The present application provides a surface-modified sodium electric precursor, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) injecting a mixed solution A, a precipitant solution and a complexing agent solution into a base solution in a cocurrent flow manner, and performing a one-step co-precipitation reaction; and (2) switching the mixed solution A into a mixed solution B, and continuing to perform a two-step co-precipitation reaction to obtain a surface-modified sodium electric precursor, wherein the mixed solution A comprises a main metal element and a doped metal element, and the mixed solution B comprises a coating metal element. In the present application, the coating modification of the surface of precursor particles is achieved by means of a heterogeneous precipitation method, such that the coating layer is more uniform and complete, and the thickness and the components are adjustable, which is beneficial to improving the stability and electrochemical performance of the material. The preparation method involved in the present application is simple and easy to implement, and is easy for industrial application.
A method for preparing iron phosphate from lateritic nickel ore hydrometallurgical slag, which obtains a high-purity ferrous ferric oxide intermediate product by means of phase regulation-reduction roasting-magnetic separation, as well as wet leaching-co-precipitation, to prepare a high-purity iron phosphate product. This method realizes high-value utilization of iron in lateritic nickel ore hydrometallurgical slag, and better solves environmental problems caused by long-term storage and landfilling of lateritic nickel ore hydrometallurgical slag; the prepared iron phosphate product can be used for the preparation of lithium iron phosphate batteries, which has high economic benefits, and is conducive to promotion and application; moreover, the obtained non-magnetic substances can be used to produce building materials, cement and other additional products, and the filtrate from the precipitation reaction can be used to produce ammonium salt by-products, thereby further maximizing the utilization of lateritic nickel ore resources.
xabcde22, wherein 0.5 ≤ x ≤ 1, 0.1 ≤ a ≤ 0.4, 0.2 ≤ b ≤ 0.4, 0.01 ≤ c ≤ 0.2, 0.01 ≤ d ≤ 0.2, 0.2 ≤ e ≤ 0.5, and a + b + c + d + e = 1; Ni and Fe content gradually reduces from the center of the sodium battery inner core to the surface, while Cu, Zn, and Mn content gradually increases. Gradient doping is carried out on the sodium battery inner core of the sodium battery positive electrode material, and a Co coating layer is arranged on the surface thereof, thus significantly improving the stability of the layered oxide sodium battery positive electrode material, and facilitating widespread popularization and use.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/48 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 10/054 - Accumulateurs à insertion ou intercalation de métaux autres que le lithium, p. ex. au magnésium ou à l'aluminium
4.
CORE-SHELL SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
A core-shell sodium battery positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) concurrent flow addition of a mixed solution A, an additive solution, a precipitant solution, and a complexing agent solution into a base solution, and carrying out a one-step coprecipitation reaction; (2) switching the mixed solution A with a mixed solution B, and continuing to carry out a two-step coprecipitation reaction to obtain a core-shell sodium battery precursor; and (3) mixing the core-shell sodium battery precursor with a sodium source and carrying out sintering treatment to obtain the core-shell sodium battery positive electrode material; the mixed solution A comprises a main metal element, and the mixed solution B comprises a main metal element and an auxiliary metal element. Elemental components in the inner core and the outer shell are controlled via multi-step coprecipitation, the prepared core-shell structure material possesses high energy density, high safety and stability, etc., and the problems of quaternary or quinary phase separation, primary particles having no crystal form, and low tap density are solved.
H01M 10/054 - Accumulateurs à insertion ou intercalation de métaux autres que le lithium, p. ex. au magnésium ou à l'aluminium
H01M 4/50 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse
H01M 4/52 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer
5.
DOPED MODIFIED NICKEL-COBALT-MANGANESE-SODIUM POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
A doped modified nickel-cobalt-manganese-sodium positive electrode material, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing a doped metal M salt with a complexing agent solution to obtain an M- complexing solution; (2) injecting a nickel-cobalt-manganese mixed salt solution, a precipitant solution, ammonia and the M- complexing solution into a base solution in a concurrent flow mode, and carrying out coprecipitation reaction to obtain a precursor; and (3) mixing the precursor with a sodium source, and carrying out sintering treatment to obtain a doped modified nickel-cobalt-manganese-sodium positive electrode material. Compared with doping during sintering, directly doping the metal element in the precursor coprecipitation stage can simplify the preparation process of the positive electrode material, and can also reduce the cost consumption in material preparation.
22, wherein 0＜x≤0.6, 0＜y≤0.4, 0＜z≤0.7. The high-rate sodium battery precursor is a sodium-electric precursor material having a porous structure. The porous structure is beneficial to the transmission of sodium ions, and allows the sodium battery layered oxide material to have a lower migration barrier and a higher ion diffusion coefficient, such that high-rate charging and discharging of the sodium-ion battery can be achieved.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
Disclosed in the present invention are a method and system for determining an optimal discharge ore pulp concentration of a thickener. The method comprises: determining a first optimal discharge ore pulp concentration range of a thickener on the basis of the highest viscosity of an ore pulp; determining a second optimal discharge ore pulp concentration range of the thickener on the basis of the minimum scale removal period of a discharge pipe; determining a third optimal discharge ore pulp concentration range of the thickener on the basis of a feed ore pulp concentration of the thickener, a feed ore pulp density of the thickener, an effective volume of the thickener, a discharge amount, and an addition amount of a flocculant; and determining an optimal discharge ore pulp concentration range of the thickener. The beneficial effects of the present invention are as follows: a discharge ore pulp concentration of the thickener is constrained by means of discharge ore pulp viscosity control, scale removal period control and effective settling time control, and finally, the optimal discharge ore pulp concentration range of the thickener is obtained, so that the problems of a heavy pumping load, an excessively short scale removal period of the discharge pipe, and the overflow of the ore pulp, which are caused by an inappropriate discharge ore pulp concentration can be prevented, and the highest production efficiency and economic benefits can be achieved.
A method for electrolytic recovery of manganese using a post-second-stage nickel-cobalt precipitation liquid in laterite-nickel ore hydrometallurgy, comprising the following steps: using an alkaline neutralizer to adjust the pH value of a post-second-stage nickel-cobalt precipitation liquid in laterite-nickel ore hydrometallurgy to 7.8-8.2, then introducing air or oxygen for oxidation, and performing solid-liquid separation to obtain a manganese residue and a filtrate; using sulfuric acid to perform acid leaching on the manganese residue, and performing solid-liquid separation to obtain a manganese-containing leachate and a filter residue; using the alkaline neutralizer to adjust the pH value of the manganese-containing leachate to 6.0-6.5, carrying out primary impurity removal, and performing solid-liquid separation to obtain an iron-aluminum residue and a post-primary impurity removal liquid; adding a soluble sulfide into the post-primary impurity removal liquid, carrying out secondary impurity removal, and performing solid-liquid separation to obtain a nickel-cobalt-containing residue and a manganese-containing purified liquid; and electrolyzing the manganese-containing purified liquid so as to obtain manganese simple substance and a post-electrolysis liquid. The method recovers manganese from an originally waste post-second-stage nickel-cobalt precipitation liquid, thus achieving high economic value and benefits while reducing resource waste and environmental pollution.
C22B 3/20 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation
C25C 1/10 - Production, récupération ou affinage électrolytique des métaux par électrolyse de solutions des métaux du groupe du fer, de métaux réfractaires ou du manganèse du chrome ou du manganèse
9.
APPLICATION OF SODIUM THIOSULFATE AS AUXILIARY AGENT FOR NICKEL-COBALT PRECIPITATION
Disclosed in the present invention is an application of sodium thiosulfate as an auxiliary agent for nickel-cobalt precipitation. The application comprises the following steps: (1) adding sodium thiosulfate to a solution after iron and aluminum removal, and stirring at 50-65°C to obtain a nickel-cobalt precipitation stock solution; (2) adding an alkali to the nickel-cobalt precipitation stock solution, adjusting the pH of a system to 7.0-7.4, and maintaining the pH to allow for sufficient precipitation of nickel and cobalt to obtain precipitate; and (3) washing the precipitate to obtain mixed hydroxide precipitate (MHP). In the present invention, sodium thiosulfate is used as the auxiliary agent for nickel-cobalt precipitation, and the precipitation rate of nickel and cobalt from the solution after iron and aluminum removal is promoted by means of the addition of the auxiliary agent, reducing the content of manganese in MHP product. The present invention has good economic value and is easy for industrial application.
An in-situ coated ternary positive electrode composite material, and the preparation and use thereof. The in-situ coated ternary positive electrode composite material comprises a ternary positive electrode base material and a fast ion conductor material, which is in-situ coated on and chemically bonded to the surface of the ternary positive electrode base material, wherein the ternary positive electrode base material is LiNi1-x-yCoxMnyO2, and the fast ion conductor material is Li2TiO3, where 0.02≤x+y≤0.67. By means of wet coating followed by lithium mixed sintering, the synchronous generation of an outer layer (Li2TiO3) and an inner layer (LiNi1-x-yCoxMnyO2) is realized, and the chemical bonding between the inner layer and the outer layer is achieved while the coating uniformity is improved, such that the coated lithium ion conductor Li2TiO3 is not prone to falling off during the charging and discharging of a battery, thereby finally improving the rate capability and the cycling performance of the ternary positive electrode composite material.
The technical solution of the present invention provides a preparation device for a neutralizing agent for a laterite nickel ore acid-leaching solution, comprising a preparation part, a buffer part, and a compartment part. The preparation part is used for mixing and preparing limestone slurry; the buffer part is used for storing the produced limestone slurry; and the compartment part has one end connected to the preparation part and the other end connected to the buffer part, and is used for stepwise pouring the slurry continuously produced by the preparation part into the buffer part and using the subsequently poured slurry to impact the previously stored slurry from the periphery. According to the present invention, the compartment part stepwise pours the limestone slurry prepared in the preparation part into the buffer part, and uses the subsequently poured slurry to impact the previously stored slurry from the periphery, namely, the stepwise injection forms impact on the stored limestone slurry, thereby avoiding excessive precipitation of the limestone slurry caused by long-time standing, guaranteeing the quality of the limestone slurry stored in the buffer part, and stabilizing the properties of the limestone slurry which serves as a neutralizing agent subsequently.
Disclosed in the present invention is a lateritic nickel ore pulp thickener, comprising a thickener body and a material pressing mechanism. The thickener body has a tapered accommodating cavity. The material pressing mechanism comprises a lifting/lowering plate, a plurality of vertical plates, a plurality of sieve plates, a lifting/lowering driving member, and a posture adjusting assembly. The lifting/lowering plate is arranged in the accommodating cavity. The vertical plates are all fixed under the lifting/lowering plate. Sieve holes are uniformly and densely formed in the sieve plates. The posture adjusting assembly is connected to the sieve plates and used for driving the sieve plates to rotate. The beneficial effects of the present invention are: the posture adjusting assembly drives the sieve plates to rotate until the sieve plates are perpendicular to the vertical plates, and the lifting/lowering driving member drives the lifting/lowering plate to descend; and at this time, the sieve plates move downwards, particles in ore pulp with a particle size smaller than the size of the sieve holes can directly pass through the sieve plates, while particles in the ore pulp with a particle size greater than the size of the sieve holes are intercepted by the sieve plates and move downwards along with the sieve plates, so that settling of the particles in the ore pulp can be accelerated, and the concentration rate of the ore pulp is increased.
Provided in a technical solution of the present invention is a multi-stage countercurrent washing system for the hydrometallurgical processing of a laterite nickel ore. The multi-stage countercurrent washing system comprises a plurality of stages of washing devices, overflow pipes and buffer tanks, wherein each buffer tank is arranged on the corresponding washing device, is connected to an overflow area of the washing device at the next stage by means of the overflow pipe, and is connected to a discharging pipe at the previous stage; an end of each overflow pipe that is connected to the corresponding buffer tank is located on an outer periphery of said buffer tank; and an end of each discharging pipe that is connected to the corresponding buffer tank is located at the top of said buffer tank to form a countercurrent between a slag phase and a washing liquid. In the present invention, by means of the buffer tanks, slag washing water at the next stage and the slag phase at the previous stage form a countercurrent, and primary first-stage solid-liquid impact-based separation is created, such that the washing liquid and materials are fully impacted. By means of a liquid injection pipe, the slag phase and the slag washing water which are impacted and mixed in a buffer pipe are injected from a position below a liquid level of the washing devices, and the slag phase in the washing devices is subjected to second-stage solid-liquid impact-based separation, such that the solid-liquid separation effect is improved.
A titanium-doped layered oxide material for a sodium-ion battery, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: mixing a nickel-iron-manganese salt solution, a precipitant solution, a complexing agent solution and a titanium source solution to perform a coprecipitation reaction, so as to obtain a precursor material of which primary particles are radially packed; mixing a sodium source and the precursor material and sintering same, so as to obtain the titanium-doped layered oxide material for a sodium-ion battery. The preparation method uses titanium doping and morphology regulation to improve the structural strength and cycle performance of the material, thereby improving lattice oxygen stability during the process of high-voltage deep desodiation, suppressing multiple phase transition reactions and also improving the plateau voltage and the energy density.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
15.
COBALT-COATED SODIUM ION BATTERY PRECURSOR, AND PREPARATION METHOD AND USE THEREFOR
A cobalt-coated sodium ion battery precursor, and a preparation method and use therefor. The cobalt-coated sodium ion battery precursor sequentially comprises, from inside to outside, a core, a transition layer and an outer coating layer. The core comprises a nickel-iron-manganese precursor material. The transition layer comprises a nickel-iron-manganese-cobalt precursor material. The coating layer comprises a cobalt hydroxide material. By carrying out gradient coating of cobalt on the nickel-iron-manganese core, cobalt is sequentially increased from inside to outside, such that the surface structure stability of the nickel-iron-manganese precursor is improved, side reaction between the electrode and the electrolyte is inhibited, and the use voltage and rate capability of the sodium-ion battery are effectively improved.
Disclosed is a method for continuously preparing mixed hydroxide precipitate from a laterite nickel ore by hydrometallurgy. Primary-precipitated mixed hydroxide precipitate particles are used as crystal nuclei, by controlling precipitation process conditions, the quantity of the crystal nuclei, and reaction time of the crystal nuclei, primary mixed hydroxide precipitate crystal nuclei gradually grow, and crystal forms become larger. By controlling the number of cycles, a proportion of returned seed crystals, and a homogenization ratio with precipitants, mixed hydroxide precipitate particles with narrow particle size distribution, dense particles, and better sedimentation effect are obtained, thereby reducing a moisture content of mixed hydroxide precipitate. The preparation method in this disclosure plays a certain guiding role in practical production and has good application prospects.
bxyz1-x-y-z22, wherein 0.4 ≤ b ≤ 1.2, 0.10 ≤ x ≤ 0.50, 0.10 ≤ y ≤ 0.50, 0.10 ≤ z ≤ 0.50; the coating layer comprises a composite oxide, and the composite oxide comprises two or more metal elements. The positive electrode material is coated with the composite oxide, which significantly improves the conductivity and stability of the positive electrode material, reduces contact between the positive electrode material and an electrolyte, inhibits the occurrence of side reactions, and improves the cycle performance of the material.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 10/054 - Accumulateurs à insertion ou intercalation de métaux autres que le lithium, p. ex. au magnésium ou à l'aluminium
18.
DOPED COATED SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
bxyzk22, where 0.6≤b≤1.2, x+y+z+k=1, 0.1≤x≤0.5, 0.01≤y≤0.10, 0.2≤z≤0.6, 0.1≤k≤0.5, and M comprises a transition metal element; and the shell comprises a transition metal oxide. As for the sodium battery positive electrode material, by means of doping, the stability of oxygen in the material is improved, and oxygen vacancies and structural recession are inhibited; and by means of being coated with a metal oxide shell, metal ions are prevented from being dissolved out, thereby improving the air stability and cycle performance of the material, such that the capacity retention rate of a battery can still reach 80% or above after 4000 cycles.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/48 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques
19.
NICKEL-IRON-MANGANESE-ZINC PRECURSOR PREPARATION METHOD THEREFOR, AND USE THEREOF
A nickel-iron-manganese-zinc precursor, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: concurrent flow addition of a nickel-iron-manganese-zinc salt solution, a precipitant solution, and a complexing agent solution into a base solution, and carrying out a coprecipitation reaction to obtain the nickel-iron-manganese-zinc precursor; wherein the complexing agent comprises sodium oxalate and/or sodium citrate. A certain amount of zinc is evenly doped in a metal layered oxide positive electrode material, and at least one among sodium oxalate and sodium citrate is selected during the preparation of the precursor to replace common the complexing agent aqueous ammonia, thus solving the problem of inconsistent precipitation speeds of ferrous ions with other metal ions when ammonia water is used as a complexing agent; simultaneously, the complexing speed is regulated and controlled by means of controlling reaction temperature, thus controlling metal ion precipitation speeds, thereby realizing further control of precursor morphology.
H01M 4/50 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse
H01M 4/52 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer
20.
PROCESS FOR INHIBITING SILICON LEACHING DURING HIGH-PRESSURE LEACHING OF LATERITE-NICKEL ORE
Disclosed in the present invention is a process for inhibiting silicon leaching during high-pressure leaching of laterite-nickel ore. The process comprises the following steps: performing first-stage high-pressure acid leaching on a laterite-nickel ore mixed ore slurry, and then performing second-stage medium-pressure acid leaching, the temperature of the first-stage high-pressure acid leaching being 230-260℃, and the temperature of the second-stage medium-pressure acid leaching being 150-200℃. In the present invention, high-pressure acid leaching is performed on laterite-nickel ore at a temperature of 230-260℃ to ensure that valuable metal nickel and cobalt can be effectively leached out while impurity metals such as iron and aluminum can be hydrolyzed as much as possible, and then second-stage medium-pressure acid leaching is performed at a temperature of 150-200℃ to promote hydrolysis of silicon to the maximum extent and greatly reduce the content of impurity silicon in the liquid obtained after leaching, thereby greatly reducing the content of silicon in subsequent MHP products, and further greatly improving the efficiency of an acid leaching procedure during the preparation of nickel sulfate crystals.
A nickel-cobalt-manganese ternary precursor having a high specific surface area, and preparation and a use thereof. The preparation comprises the following steps: S1, in an inert atmosphere, introducing in parallel a mixed metal salt solution containing nickel, cobalt and manganese, a strong alkaline solution, and ammonia water into a reaction kettle base solution, and carrying out a nucleation stage reaction in a coprecipitation process to obtain a first slurry containing seed crystals; S2, in the inert atmosphere, reducing the pH value in the first slurry by 1.0-2.0, carrying out stirring, and carrying out a stage I growth reaction to obtain a second slurry containing stage I crystal grains; and S3, in an oxygen-containing atmosphere, reducing the pH value in the second slurry by 0.4-0.6, carrying out stirring, and carrying out a stage II growth reaction to obtain a second slurry containing stage II crystal grains, wherein the stage II crystal grains are the nickel-cobalt-manganese ternary precursor having a high specific surface area, and the D50 of the stage I crystal grains is 1/2-4/5 of the D50 of the stage II crystal grains. The specific surface area of the nickel-cobalt-manganese ternary precursor is increased, and the structural uniformity of the nickel-cobalt-manganese ternary precursor is maintained.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
22.
APPARATUS FOR INCREASING SOLID-LIQUID RATIO OF THICKENER UNDERFLOW
The present invention relates to an apparatus for increasing the solid-liquid ratio of a thickener underflow, comprising an outer cylinder, a centrifugal assembly, and a backflow assembly. The centrifugal assembly comprises an inner cylinder, a screen, and a driving member. The inner cylinder is disposed in the outer cylinder and is rotationally connected to the outer cylinder; the screen is arranged at an opening formed in the outer wall of the inner cylinder; a feed port connected to an upper-stage thickener underflow and a lower-stage thickener overflow is formed in the top of the inner cylinder, a discharge port is formed in the bottom of the inner cylinder, and the outer wall of the inner cylinder above the screen is provided with an overflow port; the driving member is mounted on the outer cylinder, an output end of the driving member is connected to the inner cylinder; and the backflow assembly is communicated with the gap between the outer cylinder and the inner cylinder. Light and heavy ore particles can be separated so as to increase the solid content of ore pulp, thereby improving the washing efficiency of thickeners. The apparatus can decrease the number of stages of thickeners and reduce the water absorption ratio, thereby effectively saving costs.
Provided are a doped and coated sodium-ion positive electrode material, a preparation method therefor and a use thereof. The doped and coated sodium-ion positive electrode material comprises a core and a coating layer located on the surface of the core; the core comprises a nickel-iron-manganese sodium-ion positive electrode matrix and a titanium element doped in the nickel-iron-manganese sodium-ion positive electrode matrix; and the coating layer comprises a titanium-containing oxide. According to the provided sodium-ion positive electrode material, by synergistically combining bulk doping of titanium in the core with a titanium-containing oxide surface coating, the voltage decay is mitigated while the capacity is increased.
H01M 4/485 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques d'oxydes ou d'hydroxydes mixtes pour insérer ou intercaler des métaux légers, p. ex. LiTi2O4 ou LiTi2OxFy
H01M 4/50 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse
H01M 4/52 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer
H01M 10/054 - Accumulateurs à insertion ou intercalation de métaux autres que le lithium, p. ex. au magnésium ou à l'aluminium
24.
MAGNETIC SEPARATION APPARATUS FOR IRON-BEARING SUBSTANCES IN HYDROMETALLURGICAL TAILINGS FOR LATERITE NICKEL ORE
A magnetic separation apparatus for iron-bearing substances in hydrometallurgical tailings for a laterite nickel ore. The magnetic separation apparatus comprises: a tube (1) which is configured to allow tailings to be poured from the top end of the tube, wherein a plurality of vertical flat holes (101) running through the tube (1) are provided in an outer side of the tube (1); a magnetic separation member (2) comprising an electromagnetic plate (21) and a sliding sleeve (22), wherein the electromagnetic plate (21) is arranged in the flat hole (101), the sliding sleeve (22) is sleeved on an outer side of the electromagnetic plate (21) and can shuttle back and forth in the flat hole (101) along the electromagnetic plate (21), and by means of the electromagnetic plate (21), iron-bearing substances are magnetically attracted to the sliding sleeve (22) in an area where the electromagnetic plate overlaps with the sliding sleeve (22); a driving member (3) which is configured to drive the sliding sleeve (22) to shuttle back and forth in the flat hole (101); and a material guide member (4) which is configured to receive the iron-bearing substances which are brought out of the tube (1) by the sliding sleeve (22) and released from magnetic attraction and fall down.
A storage tank for neutralizer powder for a lateritic nickel ore acid leach solution, comprising a tank body (1) and a restoring apparatus (2). A feed port is formed in the top of the tank body, and a discharge port is formed in the bottom of the tank body. The restoring apparatus comprises a high-pressure air source (21) and a plurality of branch pipes (22); the high-pressure air source is located outside the tank body; the branch pipes penetrate through the tank body and are sealedly connected to the tank body; air inlet ends of the branch pipes are communicated with the high-pressure air source, air outlet ends of the branch pipes face upwards and are located in the tank body, and the air outlet ends of the plurality of branch pipes are distributed at intervals along the height direction. The storage tank is provided with the restoring apparatus, the high-pressure air source blows air into the tank body by means of the plurality of branch pipes, the branch pipes are distributed at intervals along the height direction, powder in an upper layer has the lowest density and is the first to be blown away, and after the powder in the upper layer is blown away, the pressure on powder in a lower layer is reduced and the powder can also be blown away by the airflow blown out from lower branch pipes, thereby restoring the powder in the entire storage tank to a fluffy state.
B65D 88/70 - Grands réceptacles caractérisés par des moyens pour faciliter le remplissage ou le vidage en empêchant la formation de ponts par des jets de fluide
26.
DRUM-TYPE ORE WASHING DEVICE FOR LATERITE NICKEL ORE
A drum-type ore washing device for a laterite nickel ore. The drum ore washing device comprises: a plurality of ore washing drums (1), a slurry intake structure (2), a plurality of driving mechanisms (3) and a water injection mechanism (4), wherein an ore washing cavity is formed in each ore washing drum (1); the slurry intake structure (2) is provided with a main conveying channel (21) and a plurality of material conveying channels (22), wherein a consistency measurement module (23) for measuring the consistency of slurry is provided in the main conveying channel (21); the plurality of driving mechanisms (3) are respectively connected to the plurality of ore washing drums (1); and the water injection mechanism (4) is arranged in each washing cylinder (1). The drum ore washing device for a laterite nickel ore can convey and wash, on the basis of the consistency condition of raw materials, the raw materials in a targeted manner; for a slurry with a large consistency, due to the high mud content, the slurry needs to be fed into a first-stage ore washing drum; and for a slurry with a relatively small consistency, the slurry is conveyed into a subsequent ore washing drum on the basis of a consistency setting condition of the slurry, thus reducing the number of ore washing steps relatively, ensuring that ores can be fully cleaned, and facilitating an increase in the ore washing efficiency.
B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations
B08B 3/10 - Nettoyage impliquant le contact avec un liquide avec traitement supplémentaire du liquide ou de l'objet en cours de nettoyage, p. ex. par la chaleur, par l'électricité ou par des vibrations
B08B 13/00 - Accessoires ou parties constitutives, d'utilisation générale, des machines ou appareils de nettoyage
27.
REACTION KETTLE FOR NEUTRALIZATION AND IMPURITY REMOVAL OF LATERITE NICKEL ORE
The present invention belongs to the technical field of metallurgy. Disclosed is a reaction kettle for the neutralization and impurity removal of a laterite nickel ore. The reaction kettle comprises a kettle body, a feeding device, a detection device and a stirring device, wherein a plurality of reaction layers are formed inside the kettle body in a height direction of the kettle body; the feeding device comprises a plurality of output portions, wherein outlets of the plurality of output portions are respectively in communication with the plurality of reaction layers, and an inlet of each output portion is in communication with both a slurry conveying unit for conveying slurry and a neutralizer conveying unit for conveying a neutralizer, and a first valve and a second valve are provided between pipelines which are in communication with the slurry conveying unit and the neutralizer conveying unit; and the detection device is provided with a plurality of detection members, each reaction layer being internally provided with at least one detection member. The present invention provides layered control and adjustment of the pH value of the slurry in the kettle body, such that the pH value of the slurry at each position in the kettle body is kept within a proper range, thus avoiding large differences in pH values and local over-alkalinity.
A high-pressure leaching flash tank for a laterite nickel ore. The high-pressure leaching flash tank comprises a tank body, a buffer assembly and a stirring assembly, wherein a steam outlet is provided at an upper end of the tank body, a liquid discharge port is provided at a lower end of the tank body, and a liquid inlet is provided at a side portion of the tank body; the buffer assembly comprises a housing, a rotating shaft and an impeller, wherein the housing is arranged in the tank body, and is provided with a cavity and an inlet and an outlet which are in communication with the cavity; the outlet is located at the bottom of the housing, the inlet is connected to the liquid inlet, an upper end of the rotating shaft is rotationally mounted in the cavity, a lower end of the rotating shaft extends out of the cavity from the outlet, and the impeller is located in the cavity and connected to the upper end of the rotating shaft; and the stirring assembly is mounted at the lower end of the rotating shaft, and is configured to extend into a slurry. By providing the buffer assembly and the stirring assembly, the method can avoid scouring and abrasion of the tank body by a high-speed slurry; and a high-speed liquid flow can also be used to do work, so as to stir the bottom of the slurry.
A tank-type ore washer for a laterite nickel ore. The tank-type ore washer comprises a rack (1), a rotating shaft (2), a blade (3), a locking member (4) and a power device (6), wherein the rack (1) is provided with a washing tank (11); the rotating shaft (2) is rotationally mounted in the washing tank (11), and the rotating shaft (2) is provided with a cavity (23) and a slot (221) in communication with the cavity (23); a locking hole (321) is provided in one end of the blade (3), the blade (3) is adapted to the slot (221), and the end of the blade (3) provided with the locking hole (321) is inserted into the slot (221); the locking member (4) is movably mounted in the cavity (23) in a direction moving close to and away from the blade (3), such that when the locking member (4) is close to the blade (3), the locking member (4) passes through the locking hole (321), so as to limit separation of the blade (3) from the slot (221); and the power device (6) is connected to the rotating shaft (2) and configured to drive the rotating shaft (2) to rotate. Dismounting and mounting can be completed by means of driving the locking member (4), the replacement speed is high, the operation is simple, and the maintenance time of an apparatus is greatly shortened, so that the production efficiency is effectively increased.
A method for low-cost extraction and separation of battery-grade nickel and cobalt from laterite-nickel ore, comprising the following steps: adjusting a pH value of a laterite-nickel ore high-pressure leachate to 2.5 or above to obtain a leachate A; introducing the leachate A into a continuous ion exchange resin device to adsorb nickel to obtain a nickel-adsorbed resin and a resin adsorption tail liquid; desorbing the nickel-adsorbed resin to obtain a first nickel salt solution; performing extraction, washing and back-extraction on the first nickel salt solution by means of an extraction organic phase to obtain a battery-grade nickel solution of a target concentration; adding a reducing agent into the obtained resin adsorption tail liquid, adding a precipitant after the reaction to adjust the pH value of the resin adsorption tail liquid to 7-8, and performing pressure filtration to obtain a cobalt hydroxide intermediate product; and preparing a battery-grade cobalt salt solution of a target concentration by using the cobalt hydroxide intermediate product as a raw material. According to the method, nickel and cobalt are separated at an early stage of a metallurgical process, thereby solving the problem of a tedious process flow of nickel and cobalt extraction and separation, saving a large amount of usage of a flocculant and liquid alkali, and reducing costs.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/62 - Emploi de substances spécifiées inactives comme ingrédients pour les masses actives, p. ex. liants, charges
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
32.
TWO-STEP EXTRACTION PROCESS FOR PREPARING BATTERY-GRADE NICKEL FROM LATERITE-NICKEL ORE HIGH-PRESSURE LEACH SOLUTION
The present invention relates to a two-step extraction process for preparing battery-grade nickel from a laterite-nickel ore high-pressure leach solution, comprising the following steps: preparing an extraction organic phase; mixing the extraction organic phase with a laterite-nickel ore high-pressure leach solution having a pH value of 2-5 and performing extraction to obtain a first nickel-loaded organic phase; using a pickling acid to wash the first nickel-loaded organic phase to obtain a second nickel-loaded organic phase; using a first stripping acid to strip Ni from the second nickel-loaded organic phase to obtain a first-stage stripped solution; adding an acid solution to the first-stage stripped solution to prepare a second stripping acid, and introducing the second stripping acid into a stripping section for second-stage stripping to obtain a second-stage stripped solution; and subjecting the second-stage stripped solution to a saponification-based impurity removal extraction line to obtain a battery-grade nickel solution. In the present invention, the battery-grade nickel is prepared by utilizing a two-step extraction process of segmented stripping and subsequent saponification-based extraction and impurity removal. The problem that extraction agents are not acid-resistant is solved, and the concentration of nickel in the final stripped solution is guaranteed; in addition, by placing the extraction and impurity removal step at the end, nickel is effectively enriched, the subsequent crystallization cost is reduced, and the resulting nickel-enriched solution is purified.
C22B 3/26 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques
33.
METHOD FOR RECOVERING MN, MG, NI, AND CO FROM LATERITE-NICKEL ORE TAILINGS
Disclosed in the present invention is a method for recovering Mn, Mg, Ni, and Co from laterite-nickel ore tailings. The method comprises the following steps: adding concentrated sulfuric acid to an underflow from thickened laterite-nickel ore tailings for first-stage leaching to obtain a magnesium sulfate solution and tailings with magnesium preliminarily removed; slurrying the tailings with magnesium preliminarily removed and then adding concentrated sulfuric acid and hydrogen peroxide for second-stage leaching to obtain a crude manganese solution; adjusting the pH of the solution to 5-7 to undergo a reaction to remove impurities such as Fe, Al, Sc, and Si from the crude manganese solution, and carrying out pressure filtration to obtain a manganese solution subjected to preliminary impurity removal; and then adding a sulfide for deep impurity removal to remove Ni and Co, and carrying out filtration to obtain a qualified manganese electrolyte solution and cobalt nickel sulfide residue. The present invention creatively proposes a method for recovering Mn, Mg, Ni, and Co from laterite-nickel ore tailings. The recovery process does not need heating and has a small consumption of auxiliary materials, and a low cost. The extracted manganese sulfate solution can completely meet the requirements for electrolytic manganese.
Disclosed in the present invention is a method for reducing the water content of an MHP product of laterite-nickel ore and increasing the manganese content thereof. The method comprises the following steps: (1) using concentrated sulfuric acid to adjust the pH of a solution obtained after two-stage neutralization for iron-aluminum removal to 2-4.5; (2) adding hydrogen peroxide to the system of step (1) for reaction, upon completion of the reaction, adding an alkali to adjust the pH of the system to 6.5-7.5, and performing primary nickel-cobalt precipitation, so as to obtain a primary nickel-cobalt precipitate solution; and (3) settling in a thickener the primary nickel-cobalt precipitate solution of step (2), and performing pressure filtration on a bottom flow obtained after the thickening, so as to obtain an MHP product. By means of jointly controlling the pH of the solution obtained after two-stage neutralization for iron-aluminum removal and the amount of hydrogen peroxide, the present invention can obviously increase the manganese content in MHP; additionally, the method will not additionally introduce other impurities and can obviously reduce the water content of the MHP product, thus reducing the volume and freight charges, and solving the industrial technical problem of high water contents of MHP.
Provided are a modified P2-type sodium battery positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: concurrent flow addition of a nickel-manganese salt solution, a precipitant solution, and a complexing agent solution into a base solution, and carrying out a coprecipitation reaction to replace the nickel-manganese salt solution with a cobalt salt solution; continuing to carry out a coprecipitation reaction to obtain a sodium battery precursor; mixing and sintering the sodium battery precursor and a sodium source, and separately coating a carbon layer and a metal oxide. The modified P2-type sodium battery positive electrode material prepared using the present method is a P2-type manganese-based layered oxide structure; the battery has excellent cycle performance, rate capability, and material stability, the battery can reduce side reactions with the electrolyte at high potentials, lowers material dissolution and electrolyte consumption, and improves the cycle performance of a material.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/62 - Emploi de substances spécifiées inactives comme ingrédients pour les masses actives, p. ex. liants, charges
36.
COMPREHENSIVE RECYCLING METHOD FOR LATERITE NICKEL ORE HYDROMETALLURGICAL SLAG
A comprehensive recycling method for laterite nickel ore hydrometallurgical slag. The method is mainly to perform operations such as acid leaching, alkali leaching, and calcining on laterite nickel ore hydrometallurgical slag, and in the process of recovering iron concentrates and/or iron phosphate products, sodium silicate, calcium sulfate, magnesium oxide, and aluminum oxide products can also be recovered, so that comprehensive recycling of the laterite nickel ore hydrometallurgical slag is achieved to the maximum extent, thereby achieving comprehensive development and utilization of laterite nickel ore resources; and the method results no three-waste emissions, the process is green and environment-friendly, and the method is simple and feasible, and is conducive to popularization and application.
C22B 7/00 - Mise en œuvre de matériaux autres que des minerais, p. ex. des rognures, pour produire des métaux non ferreux ou leurs composés
C22B 3/06 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés par lixiviation dans des solutions inorganiques acides
C22B 3/12 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés par lixiviation dans des solutions inorganiques alcalines
C22B 3/46 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés chimiques par substitution, p. ex. par cémentation
0.67xy(1-x)(1-y)(1-x)22; wherein 0＜x≤0.01, 0.2≤y≤0.4, and the M element comprises any one or a combination of at least two of Zn, Mg, Cr, Ti or Al. The provided P2 type nickel-manganese binary sodium battery positive electrode material, by means of doping and modification of specific metal elements, can reduce the capacity degradation rate in the battery cycling process, and prolong the service life of the battery. In addition, the preparation process is simplified, the raw material cost is reduced, the economic benefit is improved, and commercial application is facilitated.
H01M 4/485 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques d'oxydes ou d'hydroxydes mixtes pour insérer ou intercaler des métaux légers, p. ex. LiTi2O4 ou LiTi2OxFy
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 10/054 - Accumulateurs à insertion ou intercalation de métaux autres que le lithium, p. ex. au magnésium ou à l'aluminium
H01M 4/38 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'éléments simples ou d'alliages
38.
COPPER-IRON-MANGANESE-BASED SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD AND USE THEREFOR
A copper-iron-manganese-based sodium battery positive electrode material, and a preparation method and use therefor. The preparation method comprises the following steps: mixing a copper-iron-manganese-based precursor, a sodium source, a transition metal source and a solvent, removing the solvent, and sintering, so as to obtain the copper-iron-manganese-based sodium battery positive electrode material. The preparation method can achieve doping and coating of the positive electrode material in one step, specifically, metal ions are doped into the positive electrode material, the surface of the positive electrode material is coated with a metal fast ion conductor layer, such that the cycling stability, the gas generation performance and the sodium ion conductivity of the positive electrode material are improved, and the sliding of the inner core transition metal layer is also inhibited.
A treatment method for laterite nickel ore by curing and roasting-water leaching-atmospheric pressure acid leaching is provided. The treatment method includes the following steps: mixing a laterite nickel ore dry powder, concentrated sulfuric acid, and sodium fluoride uniformly, performing curing and roasting under a reducing atmosphere to obtain a cured material; performing water leaching on the cured material to obtain a water leaching solution and a water leaching slag after filtration; and performing atmospheric pressure acid leaching on the water leaching slag to obtain an acid leaching solution and an acid leaching slag after filtration.
A process and system for recovering manganese from a high-pressure leaching system of laterite nickel ore, including the following steps: S1. adding limestone to the high-pressure leaching solution of the laterite nickel ore for pre-neutralization to obtain first-stage carbon dioxide and a neutralization solution, adding limestone for precipitation of iron and aluminum to obtain second-stage carbon dioxide and a slurry, and adding liquid alkali to the slurry for precipitation of nickel-cobalt-manganese to obtain nickel-cobalt-manganese hydroxide and a nickel-cobalt-manganese precipitated lean solution; S2. collecting first-stage carbon dioxide and second-stage carbon dioxide and passing same into a nickel-cobalt-manganese precipitated lean solution, adjusting the pH value of the nickel-cobalt-manganese precipitated lean solution to 5-6.5 by liquid alkali, and then performing a precipitation reaction to obtain a crude manganese carbonate; S3. dissolving the crude manganese carbonate with sulfuric acid to obtain a dissolution liquid and third-stage carbon dioxide, then removing calcium and magnesium from the dissolution liquid to obtain a manganese sulfate solution and then evaporating and crystallizing to obtain manganese sulfate crystals; recycling the third-stage carbon dioxide and introducing same into a nickel-cobalt-manganese precipitated lean solution; the recovery rate and utilization rate of manganese is high, and the carbon emission from laterite nickel ore leaching process is reduced.
C22B 3/26 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques
C22B 3/44 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés chimiques
41.
Wastewater treatment process in production of nickel cobalt hydroxide
A wastewater treatment process in the production of nickel cobalt hydroxide includes the following steps: S1. subjecting a laterite nickel ore acid-leaching solution successively to iron-aluminum removal and nickel-cobalt precipitation to obtain wastewater; S2. subjecting the wastewater successively to chromium ions, manganese ions, and silicon ion removal treatments to obtain a suspension; and S3. reusing portion of the suspension and continuing iron-aluminum removal; subjecting the remaining suspension successively to homogenizing, alkali adjusting, standing still, CCD counter-current washing, and solid-liquid separation to obtain a supernatant and a residue phase, collecting the residue phase, and discharging the supernatant after neutralization. This method used to treat the laterite nickel ore wastewater can meet the discharge standard, with high safety.
C02F 9/00 - Traitement en plusieurs étapes de l'eau, des eaux résiduaires ou des eaux d'égout
C02F 1/26 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par extraction
C02F 1/52 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par floculation ou précipitation d'impuretés en suspension
C02F 1/54 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par floculation ou précipitation d'impuretés en suspension utilisant des produits organiques
C02F 103/16 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de procédés métallurgiques, c.-à-d. de la production, de la purification ou du traitement de métaux, p. ex. déchets de procédés électrolytiques
42.
High-pressure reactor acid adding system for laterite nickel ore hydrometallurgy
A high-pressure reactor acid adding system for laterite nickel ore hydrometallurgy includes: an acid liquor supply tank, an acid adding pipe, an acid adding pump, a pressure stabilizer, and a high-pressure reaction kettle, where one end of the acid adding pipe is communicated with the high-pressure reaction kettle, the other end thereof is communicated with the acid liquor supply tank, and the acid adding pump is disposed on the acid adding pipe and is configured to pressurize and pump acid liquor in the acid liquor supply tank to the high-pressure reaction kettle through the acid adding pipe; and the pressure stabilizer is disposed on the acid adding pipe and is configured to dynamically accommodate or discharge the acid liquor, to reduce pressure fluctuation in the acid adding pipe. Compared with the prior art, according to this disclosure, the pressure stabilizer is disposed on the acid adding pipe.
Disclosed is an automatic descaling system for high-pressure reactor of laterite nickel ore, which comprises a high-pressure reactor, multiple mixing devices, multiple detection devices, and a scale removal assembly; within the reactor, multiple partition plates are arranged sequentially along the material flow direction, dividing the internal cavity of the reactor into multiple compartments. Multiple mixing devices are correspondingly installed within the multiple compartments, and multiple detection devices are correspondingly installed in the multiple compartments as well. The scale removal assembly comprises an acid storage tank, multiple first connecting pipes, and multiple first control valves. Multiple first control valves are correspondingly installed on the multiple first connecting pipes. This disclosure finely adjusts the amount of acid injected based on the thickness of the scale, not only achieving a better descaling effect but also correspondingly reducing the usage of acid, thereby lowering the production costs for enterprises.
A dynamic optimization method for acid-to-ore ratio in high-pressure leaching of laterite nickel ore includes: obtaining a feed ore composition, a pulp concentration, a pulp flow rate, a leaching temperature and a pulp duration time in an autoclave, and setting a target leaching rate of nickel; setting a flow rate of sulfuric acid; obtaining a relationship between a hydrogen ion concentration in a solution and a reaction time; obtaining a theoretical leaching rate of nickel when a leaching time reaches the pulp duration time in the autoclave; comparing the theoretical leaching rate of nickel with the target leaching rate of nickel; adjusting the set flow rate of the sulfuric acid until the theoretical leaching rate of nickel is equal to the target leaching rate of nickel, calculating a corresponding optimal acid-to-ore ratio; and adjusting an opening degree of a sulfuric acid flow regulating valve of the autoclave.
A method for green and low-cost extraction of nickel-cobalt from laterite nickel ore includes: (1) iron removing pretreatment: adding an iron removing agent to a high-pressure leaching solution of the laterite nickel ore to reduce an iron concentration to less than 0.2 g/L to obtain a laterite nickel ore leaching solution; (2) nickel adsorption: adsorbing and enriching nickel in the laterite nickel ore leaching solution using a first resin adsorption process to obtain a nickel adsorption resin and a nickel adsorption tail liquid; wherein the nickel adsorption resin is desorbed to obtain a crude nickel solution; (3) cobalt adsorption: subjecting the nickel adsorption tail liquid to cobalt adsorption and enrichment by a second resin adsorption process to obtain a cobalt solution by desorbing; (4) copper adsorption: subjecting the crude nickel solution to a third resin adsorption process for removing copper to obtain a purified nickel solution.
B01D 15/18 - Adsorption sélective, p. ex. chromatographie caractérisée par des caractéristiques de structure ou de fonctionnement relatives aux différents types d'écoulement
B01D 15/20 - Adsorption sélective, p. ex. chromatographie caractérisée par des caractéristiques de structure ou de fonctionnement relatives au conditionnement de la matière adsorbante ou absorbante
B01D 15/42 - Adsorption sélective, p. ex. chromatographie caractérisée par le mode de développement, p. ex. par déplacement ou par élution
C22B 3/00 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés
C22B 3/24 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques par adsorption sur des substances solides, p. ex. par extraction avec des résines solides
46.
Limestone slurry and lime milk preparing device for hydrometallurgy of laterite nickel ore
Disclosed is a limestone slurry and lime milk preparing device for hydrometallurgy of laterite nickel ore, comprising a limestone slurry preparation assembly and a lime milk preparation assembly. The limestone slurry preparation assembly comprises a first feeding machine, a grinding mill, a mixing machine, a first transfer pump, and a first buffer tank, connected sequentially. When the weight of the limestone slurry in the first buffer tank is not within a first preset range, the first feeding machine, grinding mill, mixing machine, and first transfer pump can adjust their respective operating speeds. The lime milk preparation assembly comprises a lime kiln, a second feeding machine, a nitrifying machine, a third transfer pump, and a second buffer tank, connected sequentially. The entire production line can respond in coordination, with overall automated adjustment of production efficiency and a high level of intelligence.
B01J 8/08 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés avec des particules mobiles
B01J 8/00 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés
B01J 8/10 - Procédés chimiques ou physiques en général, conduits en présence de fluides et de particules solidesAppareillage pour de tels procédés avec des particules mobiles mues par des agitateurs ou par des tambours rotatifs ou par des récipients tournants
Disclosed is a combined heat exchange system of flash tank and preheater for laterite nickel ore leaching. The system comprises a high-pressure reactor, preheating towers, and flash tanks. The preheating tower is connected to the feed inlet of the high-pressure reactor. The flash tank is connected to the discharge outlet of the high-pressure reactor, and it is also connected to the preheating tower. Inside the flash tank, there is a pressure relief chamber and a buffering mechanism. The buffering mechanism comprises a buffering component and a connecting structure that are interconnected. In this disclosure, the buffering component of the pressure relief chamber is equipped with a central bulge and a buffering tank, materials falling from the pressure relief chamber can sequentially pass over the central bulge and slide from one end of the buffering tank to the other, then slide upwards out of the tank, achieving a buffering effect.
A system for optimizing duration time of high-pressure leaching of laterite nickel ore, includes a data collecting module, an actual duration time calculating module configured to obtain an actual duration time of the pulp in the autoclave during the high-pressure leaching process, an optimal duration time determining module configured to obtain an optimal duration time corresponding to a maximum income value, according to the qualities of the pulp, and a duration time control module configured to compare an actual duration time with the optimal duration time under this condition, and control opening degrees of a feed valve and a discharge valve of the autoclave by using a feedback control system, to ensure the actual duration time of the pulp in the autoclave is within the optimal duration time all the time.
Disclosed is a treatment system for removing iron-aluminum-chromium reaction products in leaching solution of laterite nickel ore, comprising a reaction tank, a lifting assembly, a flushing assembly, and a receiving box. The lifting assembly comprises a rotating shaft, a net pouch, and a connecting rod. The rotating shaft is rotatably connected to the reaction tank and is connected to the net pouch via the connecting rod; the rotation path of the net pouch covers and adheres to the inner bottom wall of the reaction tank, and it can be rotated to a first position and a second position; the receiving box can slide to a position directly below the net pouch at the second position. This solution addresses the current issues of requiring multiple thickeners for solid-liquid separation, which results in large equipment size and inconvenience in use.
Disclosed is a treatment system for the slag phase after removing iron-aluminum-chromium from leaching solution of laterite nickel ore, comprising a filtering module, a refining module, a feeding module, and a measurement module. The filtering module comprises a material suction component and a filtering assembly. The filtering assembly is connected to the outlet of the material suction component and features a filter residue outlet and a filtrate outlet. The refining module is connected to the filter residue outlet. The feeding module consists of a material pipe and a material guiding drive component. The material pipe has an inlet end connected to the outlet of the refining module. This setup enables the timely filtration of the generated slag phase, followed by refinement processing, and allows for the controlled metering of the returned filter residue. Consequently, it enhances the subsequent acid leaching and dissolution efficiency of the slag phase.
Disclosed is a precipitation system for hydrometallurgical processing of laterite nickel ore, comprising a reaction tank, a feeding assembly, and a discharging assembly. Inside the reaction tank, there is a holding chamber; the feeding assembly comprises a first inlet pipe and a second inlet pipe; the discharging assembly comprises a material lifting pipe and a gas conduit; the gas conduit extends into the material lifting pipe below the liquid level. By introducing gas into the material lifting pipe through the gas conduit, bubbles are entrained in the solid-liquid mixture within the material lifting pipe, the liquid level within the material lifting pipe rises, ultimately causing the solid-liquid mixture at the bottom of the holding chamber to be discharged through the material lifting pipe. This allows for the direct extraction of precipitates from the bottom of the holding chamber, extending the period between manual cleanings of the reaction tank.
Disclosed is a system and method for regulating aluminum precipitation during high-pressure acid leaching of laterite nickel ore, the system comprises an autoclave, a subsequent processing equipment, and a control device; the autoclave comprises a kettle body, a first feeding pipe, a second feeding pipe, and a discharge pipe, the subsequent processing equipment is connected to the discharge pipe and is used to process the reactants; the control device comprises a first valve, a second valve, a first pressure sensor, a second pressure sensor, an aluminum ion detection device, and a control unit. This disclosure can maintain the aluminum ion concentration in the leachate within an appropriate range, effectively reducing fluctuations in the production process, achieving stable production, and lowering production and maintenance costs.
The present application relates to a sodium-ion battery precursor, a positive electrode material, a preparation method therefor, and a use thereof. The preparation method comprises the following steps: adding a mixed metal salt solution, a precipitant solution, a complexing agent solution, and an anion solution to a base solution in parallel, and performing a coprecipitation reaction to achieve a first target particle size; and continuing to add a ferrous sulfate solution, a diammonium hydrogen phosphate solution, the complexing agent solution, and the anion solution in parallel, performing a coprecipitation reaction to achieve a second target particle size, and performing solid-liquid separation, washing, and drying to obtain the sodium-ion battery precursor, wherein metal salts in the mixed metal salt solution include a nickel salt, a ferrous salt, a copper salt, a manganese salt, and a salt modified by means of doping; and the salt modified by means of doping includes a zirconium salt and/or a tungsten salt. By means of the use of the salt modified by means of doping and the anion solution, the sodium-ion battery precursor provided by the present application prevents an irreversible phase change, thereby improving the structural stability, so that the electrochemical performance of a corresponding positive electrode material is improved.
2 2 ab1-a-b-cc22; wherein 0.1≤a＜0.5, 0.2≤b＜0.4, 0＜c＜0.08. The sodium battery positive electrode material can reduce the difficulty in embedding and removing sodium ions, increase the transportation and diffusion rate of same, such that the specific capacity of the battery is improved, the stability of the material crystal structure is improved, the cycle performance of the battery is improved, the service life of the battery is prolonged, and large-scale promotion and application are facilitated.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/62 - Emploi de substances spécifiées inactives comme ingrédients pour les masses actives, p. ex. liants, charges
55.
ANION-CATION DUAL-DOPED BATTERY PRECURSOR, POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD AND USE
The present application relates to an anion-cation dual-doped battery precursor, a positive electrode material, a preparation method and a use. The preparation method comprises the following steps: mixing a precipitant solution, a complexing agent solution, a boron source solution and a mixed salt solution, subjecting the resulting mixture to a coprecipitation reaction until a target particle size is reached, and performing solid-liquid separation, washing and drying, so as to obtain the anion-cation dual-doped battery precursor. In the present application, by means of dual doping with molybdenum cations and boron anions, the electrochemical performance of the obtained anion-cation dual-doped battery precursor is improved; moreover, by means of a mode of feeding the mixed salt solution and the boron source solution, redundant procedures are reduced, the preparation cost is reduced, and the content of Mo and B can be stabilized, thereby achieving uniform doping with Mo and B.
The present application relates to a sodium-ion battery precursor, a positive electrode material, a preparation method, and a use. A complexing agent solution used for preparing the sodium-ion battery precursor comprises a first complexing agent and a second complexing agent, wherein the first complexing agent comprises any one of or a combination of at least two of oxalic acid, sodium oxalate, or potassium oxalate, and the second complexing agent comprises any one of or a combination of at least two of citric acid, sodium citrate, or potassium citrate. In the present application, by providing the specific complexing agents, the prepared sodium-ion battery precursor has a relatively high specific surface area, thereby facilitating the intercalation of sodium ions when sintering and preparing a positive electrode material, so that the electrochemical performance of the sodium-ion battery positive electrode material can be significantly improved.
H01M 4/52 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer
H01M 4/50 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse
57.
PREHEATING DEVICE AND METHOD FOR HIGH-PRESSURE LEACHING SYSTEM FOR LATERITE NICKEL ORE
A preheating device and method for a high-pressure leaching system for laterite nickel ore, belonging to the technical field of metallurgy. The preheating device comprises a preheater (1), a steam turbine (2), a generator (3), a first-stage heater (4) and a second-stage heater (5). The first-stage heater (4) is provided with a first feeding end (41) connected to an ore pulp feeding pipe, and a first discharging end (42) connected to a second feeding end (51) of the second-stage heater (5). The second-stage heater (5) is provided with a second discharging end (52) connected to a third feeding end (11) of the preheater (1). A steam inlet (21) of the steam turbine (2) is communicated with a steam outlet (12) of the preheater (1). The steam turbine (2) is connected to the generator (3), a steam discharge end (22) of the steam turbine (2) being connected to the first-stage heater (4) so as to provide the first-stage heater (4) with a heat source by using discharged steam as a heating medium for raw materials. The generator (3) is connected to the second-stage heater (5) so as to supply power to the second-stage heater (5). The preheating device can use generated steam cyclically to enable ore pulp to be rapidly heated to a set temperature, thereby saving energy and lowering costs.
The technical solutions of the present invention provide a whole-zone coordinated water supply system, comprising water supply units and a balance unit. Each water supply unit is arranged close to a water use end, communicates with a main water supply line, and is used for storing a water source and directly conveying the stored water source to the water use end. The balance units are arranged between the plurality of water supply units and are used for communicating adjacent water supply units. In the present invention, by using the water supply units for storing the water source at positions close to water use devices, buffer spaces are provided at the ends of the water supply line, and pressure differences and flow fluctuation generated in the water pipeline are counteracted, such that the water use devices are stably supplied with water. When a single water supply unit experiences a reduced water use rate, and the water use rate is greater than the water supply rate, by means of the balance units and the nearby water supply units, the stored water source is conveyed to the water supply unit, so that multiple paths of water supply supplement is formed, the insufficient water supply rate is replenished in time, and the water supply stability for the water devices is maintained.
A multi-stage hybrid high-pressure reactor for high-pressure leaching of nickel laterite, belonging to the technical field of metallurgy. The multi-stage hybrid high-pressure reactor comprises a reactor body (1), a plurality of overflow assemblies (2) and a plurality of flow guide members (3). A material inlet pipe (11) and a material outlet pipe (12) are respectively arranged at the two ends of the reactor body (1). The plurality of overflow assemblies (2) is sequentially arranged in the reactor body (1) in the material flowing direction, so as to divide the inside of the reactor body (1) into a plurality of reaction areas (13). Each overflow assembly (2) comprises a first overflow plate (21), a second overflow plate (22) and a material pushing member (23). The material pushing member (23) is provided with a material pushing end arranged between the first overflow plate (21) and the second overflow plate (22). The plurality of flow guide members (3) is arranged at the overflow outlets (221) in a one-to-one correspondence manner. The reactor can promote the flowing and mixing of materials, so that the materials do not easily sink to the bottom. By promoting the flow of the materials, scaling can be delayed, and the slurry mixing and reaction efficiency can be improved.
Disclosed is cylindrical ore washer for hydrometallurgical smelting of laterite nickel ore, comprising a mounting bracket, a screening component, a regulator, and an ore-washing component. The screening component comprises a frame, a cylinder body, a screening cylinder, and a driving component. The cylinder body is rotatably mounted on the frame along an axis oriented in a first direction. The screening cylinder is housed within the cylinder body, with a feed inlet and a discharge outlet located at opposite ends along the first direction, respectively. The cylindrical wall of the screening cylinder is provided with multiple screen holes, and an inner side wall of the screening cylinder protrudes to form a baffle plate. This disclosure is capable of impeding the movement of ore towards the discharge outlet, thereby prolonging the residence time of the ore within the screening cylinder and enhancing both the ore-washing efficiency and cleaning effectiveness.
B03B 9/04 - Disposition générale d'un atelier de séparation, p. ex. schéma opératoire spécialement adapté aux résidus de foyers, scories de fusion ou de fonderie
B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations
61.
SYSTEM FOR PREPARING NEW ENERGY NI-CO-MN RAW MATERIAL FROM LATERITE NICKEL ORE
The present disclosure discloses a system for preparing new energy Ni—Co—Mn raw material from laterite nickel Ore. The system includes a raw auxiliary material supply module, a leaching reaction module, a neutralization and purification module, a neutralization and purification module, a Ni—Co—Mn mixed hydroxide synthesis module, a valuable metal recovery module, a crystal manufacturing module, a ternary precursor manufacturing module, and a ternary positive material manufacturing module. The present disclosure overcomes the defects of prior art and process, and is a green technology and process for simultaneous extraction of nickel, cobalt and manganese from low-grade laterite nickel ore, which not only realizes simultaneous and efficient extraction of nickel, cobalt and manganese, but also adopts energy-saving and emission reduction green technology and clean production technology to effectively recycle and safely dispose of waste water, waste residue and waste gas.
Provided are a cobalt-bromine co-coated positive electrode material, and a preparation method and use therefor. Metal salt solutions with different concentration gradients are used, such that NFM ternary precursors with different ferronickel concentration gradient distributions in the radial direction can be prepared, and the content of the metal nickel is gradually reduced from inside to outside. Then, the surface of the ternary precursors is coated with cobalt ions and bromine ions by using an atomic layer deposition technique, so as to obtain a cobalt-bromine co-coated sodium ion battery positive electrode material having low cost, high rate and high stability.
H01M 4/136 - Électrodes à base de composés inorganiques autres que les oxydes ou les hydroxydes, p. ex. sulfures, séléniures, tellurures, halogénures ou LiCoFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/1391 - Procédés de fabrication d'électrodes à base d'oxydes ou d'hydroxydes mixtes, ou de mélanges d'oxydes ou d'hydroxydes, p. ex. LiCoOx
64.
HIGH-PRESSURE ACID LEACHING TEST SYSTEM FOR LATERITE NICKEL ORE ACID
A high-pressure acid leaching test system for a laterite nickel ore acid, comprising a reaction kettle (100) and a feeding assembly (200). The feeding assembly (200) comprises two feeding boxes (210), two door plates (220), and two discharging members (230); the two door plates (220) are hingedly connected to openings formed in the bottoms of the two feeding boxes (210), respectively, and are used for opening and closing the openings; the two feeding boxes (210) are fixedly connected; the two feeding boxes (210) are slidably and sealedly connected to through grooves formed in the reaction kettle (100); when one of the feeding boxes (210) slides till the door plate (220) at the bottom of the feeding box (210) is located in the reaction kettle (100), the other feeding box (210) slides till the door plate (220) at the bottom of the feeding box (210) is located outside the reaction kettle (100); the two discharging members (230) are respectively arranged in the two feeding boxes (210) and can move through the openings in the vertical direction; and the discharging members (230) are used for carrying laterite nickel ores. In the moving process of the feeding boxes (210), it can be guaranteed that the reaction kettle (100) is always in a high pressure state during material changing, and pressure relief is not needed, so that the test cycle is effectively shortened; moreover, the removal of a solid phase in the previous reaction and the feeding step of the laterite nickel ores in the next reaction are synchronously carried out, so that the test cycle is further shortened.
An ore pulp thickening system for laterite-nickel ore, the system comprising an extrusion-type thickening device (1), a speed measurement system (2), and a control system (3), wherein the extrusion-type thickening device (1) comprises an inner barrel (11), an outer barrel (12) and a thickening mechanism (13), the inner barrel (11) is vertically arranged inside the outer barrel (12), has an upper part connected to an ore pulp feeding pipe (111) and a lower part connected to an ore pulp discharging pipe (112), and is provided with a concentration sensor (114), and a filtering surface is formed on a surface thereof; the speed measurement system (2) comprises a first speed measurement device (21) and a second speed measurement device (22) which are respectively arranged on the ore pulp discharging pipe (112) and a water drainage pipe (113); and the control system (3) comprises a first controller (31) and a second controller (32), and the first controller (31) is electrically connected to the speed measurement system (2) and a feeding valve (116). The system enables efficient concentration of ore pulp so as to save on the area occupied by apparatuses and costs.
Disclosed is a turbulent structure of a reactor, the turbulent structure comprising a reactor body (1), a main shaft (2), and a drive assembly (5), wherein the main shaft (2) is rotatably connected to the reactor body (1) and is provided with a shaft rod (201) transversely extending at a bottom end thereof, a transmission member (3) is arranged between the shaft rod (201) and the interior of the main shaft (2), a propeller-type agitator (4) is provided at an output end of the transmission member (3) to drive the propeller-type agitator (4) to rotate, the propeller-type agitator (4) rotates eccentrically around the central axis of the main shaft (2), and the propeller-type agitator (4) is used for propelling fluid upward. The main shaft (2) and the shaft rod (201) drive the propeller-type agitator (4) to perform a circular motion around the axis of the main shaft (2), expanding the area for upward agitation at the bottom, thereby creating a fluid motion inside the reactor body (1) with upward floating on one side and gradual sinking on the other side, resulting in a differential speed between the two sides of the reactor body (1). During rotation, when a blade moves into the differential region of sinking, the upward-floating fluid collides with the sinking fluid, resulting in turbulence.
B01J 3/00 - Procédés utilisant une pression supérieure ou inférieure à la pression atmosphérique pour obtenir des modifications chimiques ou physiques de la matièreAppareils à cet effet
B01J 3/04 - Récipients sous pression, p. ex. autoclaves
B01J 19/18 - Réacteurs fixes avec éléments internes mobiles
67.
HIGH-PRESSURE LEACHING REACTION KETTLE AND CONTROL METHOD THEREFOR
A high-pressure leaching reaction kettle and a control method therefor. The high-pressure leaching reaction kettle comprises a kettle body (1), a plurality of stirring mechanisms (2), and a plurality of baffle assemblies (3). Each stirring mechanism (2) comprises a stirring rod (21), a stirring drive member (22), a plurality of stirring blades (23), and a plurality of pressure measurement members (24), each pressure measurement member (24) being disposed on one stirring blade (23) and being used for measuring the pressure on the blade surface of the corresponding stirring blade (23) during rotation; and each baffle assembly (3) comprises a fixed baffle (31), a telescopic baffle (32), and a baffle height adjustment member (33). The technical solution has the beneficial effects of enabling determination of whether ore slurry has been uniformly mixed in each mixing cavity, and when the ore slurry is uniformly mixed, lowering the height of the telescopic baffle (32) so as to actively reduce the residence time of the ore slurry in each mixing cavity, thereby improving production efficiency while ensuring uniform mixing, and achieving a balance between the leaching reaction rate and the overall production efficiency.
A vanadium gradient doped sodium battery positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) mixing a vanadium source and a complexing agent solution to obtain a vanadium-containing mixed solution, conducting concurrent flow addition of a nickel-copper-iron-manganese mixed salt solution, the vanadium-containing mixed solution, a precipitating agent solution, and a complexing agent solution into a base solution, performing a co-precipitation reaction, and obtaining a sodium battery precursor; and (2) mixing the sodium battery precursor with a sodium source, performing sintering, and obtaining the vanadium gradient doped sodium battery positive electrode material; wherein during the co-precipitation reaction, the feed rate of the vanadium-containing mixed solution gradually increases while the feed rate of another solution remains unchanged. By means of first dissolving a vanadate in a complexing agent and then carrying out precipitation during a reaction, wet preparation of a vanadium-doped precursor is implemented, and by means of vanadium gradient doping, the prepared positive electrode material acquires better long cycle performance.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
69.
COATING-MODIFIED IRON-COPPER-MANGANESE-BASED PRECURSOR, PREPARATION METHOD THEREFOR, AND USE THEREOF
abc22, and then using the coprecipitation method again for a coating reaction to obtain the coating-modified iron-copper-manganese-based precursor coated with a zirconium source and an aluminum source. The addition of zirconium can improve the stability of a positive electrode material in a high-voltage area, and the addition of aluminum can improve the cycling performance of the positive electrode material. The synergistic effect of zirconium and aluminum ensures the electrochemical performance of the obtained coating-modified iron-copper-manganese-based precursor. In addition, the preparation method is simple to operate, the obtained coating layer is uniform, and the coating amount is controllable. The preparation method is suitable for industrial production.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01G 11/34 - Électrodes caractérisées par leur matériau à base de carbone caractérisées par la carbonisation ou l’activation de carbone
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
71.
TERNARY PRECURSOR OF CORE-SHELL STRUCTURE, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides a ternary precursor of a core-shell structure, and a preparation method therefor and a use thereof. The preparation method for the ternary precursor comprises the following steps: introducing, in a concurrent flow, a ternary mixed salt solution, a precipitant solution and a complexing agent solution into a base solution, and carrying out a coprecipitation reaction until a target particle size, so as to obtain the ternary precursor of a core-shell structure, wherein the base solution comprises a metal-doped molecular sieve material. The ternary precursor of the core-shell structure obtained by the preparation method provided in the present application has a nickel-rich core and a manganese-rich shell, and a positive electrode material prepared from the ternary precursor has good rate performance and cycle performance and high initial specific capacity. In addition, the preparation method provided in the present application involves simple process steps, and does not need complex steps such as secondary sintering or secondary coating, thereby facilitating industrial popularization.
C10G 53/00 - Traitement des huiles d'hydrocarbures, en l'absence d'hydrogène, par plusieurs procédés de raffinage
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/48 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/52 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer
72.
FULL-CONCENTRATION GRADIENT PRECURSOR MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
A full-concentration gradient precursor material, a preparation method therefor, and a use thereof. The full-concentration gradient precursor material comprises an inner core and an outer shell, wherein the inner core comprises a nickel-cobalt-manganese precursor material containing a doping element, and the outer shell comprises a nickel-cobalt-manganese precursor material free of a doping element; and from the center of the inner core to an outer surface of the outer shell in the full-concentration gradient precursor material, the content of the element nickel has a decreasing gradient, and the contents of the elements cobalt and manganese have increasing gradients. By means of a combination of a doped core-shell structure and a full-concentration gradient structure, the full-concentration gradient precursor material solves the problem of interface compatibility between the inner core and the outer shell and improves the power performance and cycle performance of the material.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/131 - Électrodes à base d'oxydes ou d'hydroxydes mixtes, ou de mélanges d'oxydes ou d'hydroxydes, p. ex. LiCoOx
H01M 4/1391 - Procédés de fabrication d'électrodes à base d'oxydes ou d'hydroxydes mixtes, ou de mélanges d'oxydes ou d'hydroxydes, p. ex. LiCoOx
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
73.
POSITIVE ELECTRODE MATERIAL OF BROAD PARTICLE SIZE DISTRIBUTION, PREPARATION METHOD THEREFOR, AND USE THEREOF
A positive electrode material of a broad particle size distribution, a preparation method therefor, and the use thereof. The positive electrode material of a broad particle size distribution satisfies: 1 ≤ (D90-D10)/D50 ≤ 1.5; the positive electrode material comprises a positive electrode matrix material and a coating layer coating in situ the surface of the positive electrode matrix material, the coating layer comprising lithium aluminum titanium phosphate. The provided positive electrode material has a relatively broad particle size distribution; the in-situ coating of lithium aluminum titanium phosphate allows for more tight coating and a firmer connection to the positive electrode matrix material, thereby reducing the internal transport impedance of lithium ions, facilitating the transfer and transport of lithium ion charges, effectively increasing the energy density of batteries, and improving the electrochemical performance of the batteries.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/62 - Emploi de substances spécifiées inactives comme ingrédients pour les masses actives, p. ex. liants, charges
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
74.
POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
axy22, wherein A comprises Na and/or Li; 0.6≤a≤1, 0.1≤x≤0.4, 0.2≤y≤0.6, and x+y=1; and Me comprises a transition metal element. The coating layer comprises sodium niobate. The distribution of elements in the positive electrode material is uniform; and after coating with sodium niobate, not only is the effect of isolating the positive electrode material from an electrolyte achieved, but the dynamic performance and safety performance of the positive electrode material are also improved.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
75.
DOPED AND COATED PRECURSOR MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present application are a doped and coated precursor material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: mixing a nickel-cobalt-manganese mixed salt solution, a doping solution, a precipitant solution and a complexing agent solution, or mixing a nickel-cobalt-manganese mixed salt solution containing doping ions, a precipitant solution and a complexing agent solution, or mixing a nickel-cobalt-manganese mixed salt solution containing doping ions, a doping solution, a precipitant solution and a complexing agent solution, subjecting same to a co-precipitation reaction, stopping the feeding of the nickel-cobalt-manganese mixed salt solution, the nickel-cobalt-manganese mixed salt solution containing doping ions and the doping solution when a target particle size is achieved during the co-precipitation reaction, replacing same with a coating solution and continuing the reaction, so as to obtain a doped and coated precursor material. In the preparation method of the present application, doping and coating are directly performed in one step during the co-precipitation process, which makes up for the defects of a ternary material in different application scenarios, and improves the performance of the ternary material.
Provided in the present application are a concentration-gradient iron-based sodium battery positive electrode precursor, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: mixing a nickel-iron-manganese salt solution, an M salt solution, a complexing agent solution and a precipitant solution in a parallel flow manner, and subjecting same to a co-precipitation reaction until the particle size of the resulting reaction product reaches a target particle size, so as to obtain a concentration-gradient iron-based sodium battery positive electrode precursor, wherein during the process of the co-precipitation reaction, the flow ratio of the nickel-iron-manganese salt solution to the M salt solution gradiently decreases. By means of the gradient doping of elements, the structural stability and compaction density of the positive electrode precursor material provided in the present application can be improved, and the cycle performance and electric capacity of a corresponding positive electrode material can be enhanced, making the positive electrode material have relatively high electric capacity and good cycling performance; and the positive electrode precursor is suitable for large-scale mass production.
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
H01M 10/054 - Accumulateurs à insertion ou intercalation de métaux autres que le lithium, p. ex. au magnésium ou à l'aluminium
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/485 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques d'oxydes ou d'hydroxydes mixtes pour insérer ou intercaler des métaux légers, p. ex. LiTi2O4 ou LiTi2OxFy
78.
MODIFIED LITHIUM-RICH MANGANESE-BASED POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
A modified lithium-rich manganese-based positive electrode material, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) injecting a mixed metal salt solution, a precipitant, a complexing agent, a cationic dopant and an anionic dopant into a reaction device in a parallel flow manner, and subjecting same to a co-precipitation reaction; (2) washing the product of the co-precipitation reaction, so as to obtain a modified lithium-rich manganese-based precursor; and (3) mixing the modified lithium-rich manganese-based precursor with a lithium source, and sintering same, so as to obtain a modified lithium-rich manganese-based positive electrode material. By means of the co-precipitation reaction, uniform atom-scale co-doping of anions and cations is achieved, the content of doping atoms is precise and controllable, and the problems of introduction of impurities, element segregation and even component deviation caused by traditional solid-phase reactions are avoided.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/50 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse
H01M 4/48 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques
A method for dynamically controlling high-pressure leaching reaction condition of laterite nickel ore includes: setting a target temperature and a target pressure of an high-pressure reactor; obtaining the heat power required for heating the feeding pulp to the target temperature; obtaining the heat power brought by the acid; obtaining the required new steam thermal power; obtaining the required new steam flow; adjusting the real-time flow of the new steam to the required flow of the new steam, and adjusting the exhaust valve opening degree and discharge flow rate of the high-pressure reactor to make the real-time pressure of the high-pressure reactor equal to the target pressure, and adjusting the flow rate of the new steam to make the real-time temperature of the high-pressure reactor equal to the target temperature.
A treatment method and application for laterite nickel ore leaching solution with high calcium and magnesium content, comprising the following steps: S1. preparing an extracted organic phase from the 2-hexyldecanoic acid and the HBL110/HBL116 extractant; S2. performing nickel-cobalt co-extraction on the extracted organic phase and a laterite nickel ore leaching solution with a high calcium and magnesium content to obtain a first loaded organic phase and a raffinate; in a laterite nickel ore leaching solution with a high calcium and magnesium content; S3. washing the first loaded organic phase with a washing solution to obtain a second loaded organic phase and washing water, wherein the washing water is refluxed to a laterite nickel ore leaching solution with high calcium and magnesium content; S4. adding a reverse extracting solution to the second loaded organic phase for reverse extracting to obtain a nickel-cobalt salt solution and a reverse extracted organic phase; S5. saponifying the reverse extracted organic phase to obtain a regenerated extracted organic phase; this scheme is applicable to the environment with high calcium and magnesium, can prevent calcium and magnesium from forming a third phase, and the effect of separating and purifying nickel and cobalt is good.
C22B 3/06 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés par lixiviation dans des solutions inorganiques acides
The disclosure discloses a method for preparing a battery-grade nickel-cobalt-manganese sulfate solution from low nickel matte. The method includes the following steps: grinding low nickel matte, then adding the ground low nickel matte to concentrated sulfuric acid, and carrying out atmospheric pressure leaching to obtain a first slag phase and a first liquid phase; carrying out evaporation concentration-cooling crystallization on the first liquid phase to obtain ferrous sulfate crystals; adding concentrated sulfuric acid to the first slag phase, and carrying out oxygen pressure leaching to obtain a second slag phase and a second liquid phase; adjusting pH of the second liquid phase to 3-4 to generate a precipitate, and removing the precipitate by filtration to obtain a filtrate; carrying out adsorption treatment on the filtrate by adopting chelating resin; washing the adsorbed chelating resin with a first sulfuric acid solution to obtain a washing solution containing Mg and Mn, and then washing the chelating resin with a second sulfuric acid solution to obtain a nickel-cobalt sulfate solution; and mixing the nickel-cobalt sulfate solution with the washing solution containing Mg and Mn to obtain the nickel-cobalt-manganese sulfate solution. According to the method of the disclosure, the battery-grade nickel-cobalt sulfate solution is prepared from the low nickel matte as a raw material, so that the recovery rate of nickel and cobalt is increased, and the acid consumption is reduced.
C22B 3/24 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques par adsorption sur des substances solides, p. ex. par extraction avec des résines solides
84.
Method for preparing battery-grade nickel-cobalt-manganese sulfate crystals from low nickel matte
The disclosure discloses a method for preparing battery-grade nickel-cobalt-manganese sulfate crystals from low nickel matte, which includes the following steps: S1, sequentially performing high-pressure leaching, iron-aluminum removal and nickel-cobalt-manganese precipitation treatment on laterite nickel ore to obtain an underflow containing nickel-cobalt-manganese hydroxide, wherein the pH value of the underflow is 7-8; S2, performing oxygen-pressure leaching on the low nickel matte using sulfuric acid and oxygen to obtain a leached slurry containing residual acid, adding the underflow into the leached slurry to obtain a mixed slurry, and adjusting the pH value of the mixed slurry to be 3-5 using the underflow; and S3, performing filter pressing on the mixed slurry to obtain filtrate and tailings, and performing nickel-cobalt-manganese co-extraction, concentration and crystallization on the filtrate to obtain the nickel-cobalt-manganese sulfate crystals. The method has the advantages of high utilization rate of nickel, cobalt and manganese, few impurities, reduced reagent consumption and technological processes, and high transportation efficiency.
C22B 3/26 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par extraction liquide-liquide utilisant des composés organiques
85.
LITHIUM-RICH MANGANESE-BASED CARBONATE PRECURSOR, POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD
The present application relates to a lithium-rich manganese-based carbonate precursor, a positive electrode material and a preparation method. The preparation method for the precursor comprises the following steps: (1) mixing a metal sulfate solution, a precipitant, a complexing agent solution and a reducing agent solution, continuously adding the resulting mixture into a reaction kettle, reacting same under the protection of an inert atmosphere until a target particle size is obtained, and stopping the reaction; and (2) leaving the reaction slurry to stand, then removing the supernatant, then mixing the reaction slurry with a carbonate solution, subjecting the mixture to aging, solid-liquid separation, washing and drying, so as to obtain a lithium-rich manganese-based carbonate precursor. The preparation method can synthesize a lithium-rich manganese-based carbonate precursor having a high specific surface area, and increases the specific surface area to 40-200 m2/g, thereby facilitating promoting the diffusion of a lithium source during a mixed lithium sintering process, and significantly improving the discharge capacity of the corresponding positive electrode material.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
86.
CONCENTRATION GRADIENT PRECURSOR, POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD FOR CONCENTRATION GRADIENT PRECURSOR
Disclosed are a concentration gradient precursor, a positive electrode material, and a preparation method for the concentration gradient precursor. The concentration of nickel, cobalt and manganese in the concentration gradient precursor is in a gradient transition between a core and a shell. The preparation method for the concentration gradient precursor comprises the following step: in a protective atmosphere, mixing a nickel source solution, a cobalt source solution, a manganese source solution, a precipitating agent, and a complexing agent for coprecipitation reaction to obtain the concentration gradient precursor, wherein during the coprecipitation reaction, the total flow rate of the nickel source solution, the cobalt source solution and the manganese source solution remains unchanged, and the nickel source solution, the cobalt source solution and the manganese source solution gradually change on the basis of the gradient transition. The concentration gradient precursor structure provided by the present application can effectively avoid core-shell separation, and effectively improve the cycle safety performance of high-nickel materials, the preparation method is simple, the metal content at each point of spherical particles can be accurately controlled, the product consistency is high, and industrialization is easy to achieve.
A positive electrode precursor and a preparation method therefor, a positive electrode material, and a battery. The preparation method comprises the following steps: adding a nickel-cobalt-manganese mixed salt solution, a dopant solution, a complexing agent solution and a precipitant solution into a base solution by means of concurrently flowing for a first-stage coprecipitation reaction, after a first target particle size is reached, stopping adding the nickel-cobalt-manganese mixed salt solution and the dopant solution, and adding a coating agent solution for a second-stage coprecipitation reaction to obtain a positive electrode precursor having the target particle size. In the process of preparing a precursor by means of coprecipitation, element doping and coating are carried out simultaneously, the present application is suitable for doping and coating of various elements, and the morphology, the doping amount, the particle size and the like of the precursor can be effectively regulated and controlled, so as to obtain a positive electrode precursor material having a stable structure, so that a positive electrode material has multiple properties.
C10G 53/00 - Traitement des huiles d'hydrocarbures, en l'absence d'hydrogène, par plusieurs procédés de raffinage
H01M 4/134 - Électrodes à base de métaux, de Si ou d'alliages
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
A curing roasting-water leaching-normal pressure acid leaching treatment method for a lateritic nickel ore, relating to the technical field of metal smelting. The treatment method comprises the following steps: uniformly mixing lateritic nickel ore dry powder, concentrated sulfuric acid and sodium fluoride, and then carrying out curing roasting in a reducing atmosphere to obtain a cured material; carrying out water leaching on the cured material, and filtering to obtain a water leaching solution and water leaching residues; and carrying out normal-pressure acid leaching on the water leaching residues, and filtering to obtain an acid leaching solution and acid leaching residues. The treatment method has the characteristics of controllable reaction, short reaction period, low reaction energy consumption and relatively low production cost; and compared with a conventional high-pressure acid leaching treatment process, the treatment method can significantly reduce the acid consumption, reduce the loss of valuable metals such as cobalt and nickel, increase the metal recovery rate and improve the economic benefit of production. The treatment method can reduce the corrosion of a strong oxidant to equipment, reduce the emission of a waste liquid in the leaching process and reduce the production cost while effectively guaranteeing the cobalt-nickel leaching rate.
A lateritic-nickel-ore hydrometallurgy waste gas treatment apparatus, comprising a treatment tower (1), a multi-stage spraying structure (2) and a proportioning assembly (3). A gas discharge port (101) is formed in the top of the treatment tower (1), and a gas inlet pipe (102) is provided on the treatment tower (1); the multi-stage spraying structure (2) comprises a main spraying assembly (21), auxiliary spraying assemblies (22) and first gas acidity detectors (23); the main spraying assembly (21) and the plurality of auxiliary spraying assemblies (22) are sequentially arranged in the treatment tower (1) from bottom to top, and the plurality of first gas acidity detectors (23) are disposed in the treatment tower (1) and are respectively located below the auxiliary spraying assemblies (22). According to the treatment apparatus, when waste gas is introduced, the waste gas is sprayed in the treatment tower (1) by the multi-stage spraying structure (2), the acidity of the waste gas is detected once at each stage, subsequent spraying is started or not started according to situations, and a sprayed alkaline solution is sequentially diluted from bottom to top, the degree of dilution corresponding to waste gas acidity detection at each stage. Waste gas treatment is carried out by means of refined multiple spraying and multi-stage coverage, thereby avoiding the situation in which final waste gas emission does not meet standards.
A slag phase treatment system for a lateritic nickel ore leaching solution after iron-aluminum-chromium removal, relating to the technical field of slag phase treatment for lateritic nickel ores. The system comprises a filter module (1), a refining module (2), a feed module (3), and a measurement module (4); the filter module (1) comprises a material suction assembly (11) and a filter assembly (12); the material suction assembly (11) is used for a slag phase precipitation area provided in a multi-section iron-aluminum-chromium removal unit (63), and a material suction port of the material suction assembly (11) is communicated with the slag phase precipitation area; the filter assembly (12) is connected to a discharge port of the material suction assembly (11); the filter assembly (12) is provided with a filter residue outlet, and a filtrate outlet connected to the multi-section iron-aluminum-chromium removal unit (63); the refining module (2) is connected to the filter residue outlet; the feed module (3) comprises a material pipe (31) and a material guide driving member (32); the material pipe (31) is provided with a feed end connected to a discharge port of the refining module (2); and the measurement module (4) is connected to the material guide driving member (32) and a circulating leaching pulp neutralizing unit (61). According to the system, a generated slag phase can be filtered out in time and refined, and returned filter residues are subjected to quantity control, so that the subsequent acid-leaching dissolution efficiency of the slag phase can be improved.
A process and system for recovering manganese in a system for high-pressure leaching of nickel laterite ore, comprising the following steps: S1. adding limestone to a high-pressure leaching solution of nickel laterite ore for pre-neutralization, to obtain first-stage carbon dioxide and a neutralization solution, adding limestone to precipitate iron and aluminum, to obtain second-stage carbon dioxide and a slurry, and adding liquid caustic soda to the slurry to precipitate nickel, cobalt and manganese, to obtain nickel, cobalt and manganese hydroxide, and a nickel, cobalt and manganese precipitation barren liquor; S2. collecting the first-stage carbon dioxide and the second-stage carbon dioxide, and introducing same into the nickel, cobalt and manganese precipitation barren liquor, adjusting the pH value of the nickel, cobalt and manganese precipitation barren liquor to 5-6.5 using liquid caustic soda, and then performing a precipitation reaction to obtain a crude manganese carbonate; S3. dissolving the crude manganese carbonate with sulfuric acid to obtain a dissolution solution and third-stage carbon dioxide, and then performing calcium and magnesium removal treatment on the dissolution solution to obtain a manganese sulfate solution, and evaporating and crystallizing to obtain a manganese sulfate crystal; reusing the third-stage carbon dioxide and introducing same into the nickel, cobalt and manganese precipitation barren liquor. The manganese recovery rate and utilization rate are high, and carbon emissions of the nickel laterite ore leaching process are reduced.
A method for recycling battery-grade nickel and cobalt in a short process from lateritic nickel ore, comprising the following steps: (1) iron removal pretreatment: adding an iron removal agent into a lateritic nickel ore high pressure leachate to obtain a lateritic nickel ore feed liquid; (2) nickel-cobalt adsorption: using a resin adsorption technology to adsorb nickel and cobalt in the lateritic nickel ore feed liquid, and then carrying out desorption to obtain a preliminarily-enriched crude nickel-cobalt solution; (3) nickel-cobalt co-extraction: carrying out co-extraction treatment on the crude nickel-cobalt solution to obtain a nickel-cobalt enriched liquid containing copper impurities; and (4) copper adsorption: adsorbing and removing copper in the nickel-cobalt enriched liquid to obtain battery-grade nickel and cobalt. The technological process is short; the procedures of MHP precipitation, acid dissolution, etc. are removed; the consumption of a large amount of reagents and the energy consumption are saved; the production costs of nickel and cobalt recycling are reduced; the purity of nickel-cobalt products is improved; and the problems that in the extraction stages of existing technologies, extracting agents are prone to being poisoned, reverse extraction is difficult, and the amount of water is large are solved.
C22B 3/24 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés physiques, p. ex. par filtration, par des moyens magnétiques par adsorption sur des substances solides, p. ex. par extraction avec des résines solides
A green and low-cost method for extracting nickel and cobalt from laterite nickel ore, comprising the following steps: (1) iron removal pretreatment: adding an iron removal agent into a high-pressure leaching solution of laterite nickel ore to reduce the concentration of iron to 0.2 g/L or less, so as to obtain a laterite nickel ore feed liquid; (2) nickel adsorption: adsorbing and enriching nickel in the laterite nickel ore feed liquid by using a first resin adsorption process, so as to obtain a nickel-adsorbent resin and a nickel-adsorbent tail liquid; and desorbing the nickel-adsorbent resin to obtain a crude nickel solution; (3) cobalt adsorption: adsorbing and enriching cobalt in the nickel-adsorbent tail liquid by using a second resin adsorption process, and performing desorption to obtain a cobalt solution; and (4) copper adsorption: removing copper from the crude nickel solution by using a third resin adsorption process, so as to obtain a purified nickel solution. The present invention involves green and environmentally-friendly processes, and short procedures, saves a large number of reagents, and reduces the comprehensive recovery cost of nickel and cobalt. The amount of water when the resin removes copper to purify a nickel sulfate solution is greatly reduced, and the production efficiency is improved.
H01M 4/505 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de manganèse d'oxydes ou d'hydroxydes mixtes contenant du manganèse pour insérer ou intercaler des métaux légers, p. ex. LiMn2O4 ou LiMn2OxFy
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
96.
IRON-BASED SODIUM BATTERY POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
xabcdee, wherein 0.5≤x≤1.5, 0.15≤a≤0.6, 0.05≤b≤0.5, 0.15≤c≤0.78, 0＜d≤0.4, 1.8≤e≤2.2, and M is derived from laterite-nickel ore and comprises any one or a combination of at least two of Li, B, F, P, Si, Mg, Al, Ca, Ti, V, Cu, Zn, Co, Cr, Rb, Sr, Y, Zr, Nb, Mo, Cd or La. By means of element doping, the structural stability of the iron-based sodium battery positive electrode material can be improved, and the increase of the material capacity is promoted, such that the iron-based sodium battery positive electrode material has a relatively high capacity and good cycling performance; in addition, large-scale mass production can also be achieved.
H01M 4/525 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques de nickel, de cobalt ou de fer d'oxydes ou d'hydroxydes mixtes contenant du fer, du cobalt ou du nickel pour insérer ou intercaler des métaux légers, p. ex. LiNiO2, LiCoO2 ou LiCoOxFy
H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
344; moreover, in a roasting process, aluminum oxide reacts with alkali to be converted into sodium aluminate that is easily dissolved in water, and efficient separation of aluminum in the roasted material can be subsequently realized by means of water leaching; in addition, zinc phosphide and manganese phosphide react with alkaline so as to promote conversion of iron oxide from non-magnetism to magnetism, and efficient recovery of iron can be realized in a subsequent magnetic separation process.
A lateritic nickel ore pulp thickener, comprising a thickener body (1), a plurality of turbidity measurement members (2), and a supernatant discharge mechanism (3). The thickener body (1) has a tapered accommodating cavity, a lateritic nickel ore pulp is introduced into the accommodating cavity, a discharge port (11) is formed in the bottom end of the thickener body (1), and a water discharge port (12) is formed in the lower end of the thickener body (1); the turbidity measurement members (2) are used for measuring the turbidities of the pulp at different depths in the accommodating cavity; and the supernatant discharge mechanism (3) comprises a lifting/lowering pipe (31), a connecting hose (32), and a lifting/lowering driving member (33). The height of the lifting/lowering pipe (31) is controlled by means of the lifting/lowering driving member (33), so that the height of a water inlet (311) of the lifting/lowering pipe (31) is equal to the corresponding height of the pulp having a preset turbidity, thereby preventing pulp waste caused by the over-high concentration of a discharged supernatant, and avoiding the technical problem of affecting the pulp thickening efficiency when the supernatant discharge rate is low caused by the height of a supernatant discharge port being too high.
A system for treating a reaction product from iron, aluminum and chromium removal of a lateritic nickel ore leachate, comprising a reaction tank (100), a fishing assembly (200), a flushing assembly (300), and a receiving box (400); the fishing assembly (200) comprises a rotating shaft (210), a net bag (220), and connecting rods (230); the rotating shaft (210) is rotatably connected to the reaction tank (100) and is connected to the net bag (220) via the connecting rods (230); the net bag (220) is open in the rotation direction thereof and is recessed in the direction opposite to the rotation direction thereof to form a fishing cavity; a rotation path of the net bag (220) covers and is attached to the inner bottom wall of the reaction tank (100), and the net bag (220) can rotate to a first position and a second position; when the net bag (220) rotates to the first position, an opening of the net bag (220) is inclined upwards, and when the net bag (220) rotates to the second position, the opening of the net bag (220) is inclined downwards; a flushing end of the flushing assembly (300) is arranged directly opposite the net bag (220) at the first position; and the receiving box (400) can slide to be directly below the net bag (220) at the second position. The system solves the problems in the prior art of needing to use a plurality of thickeners arranged sequentially for solid-liquid separation, large sizes of devices, and inconvenient use.
The present utility model relates to a multi-layer hydraulic shaking table for ore dressing. The multi-layer hydraulic shaking table comprises a plurality of shaking table units and a material conveyor, wherein the plurality of shaking table units are sequentially spaced apart in a height direction, every two adjacent shaking table units are in communication by means of the material conveyor, and each shaking table unit is provided with a screening surface for screening ores and a discharging end for discharging the ores obtained through screening; and the material conveyor comprises a feeding portion and a discharging pipe, wherein the feeding portion is provided with a material channel with an opening at the upper end, discharging ends of the upper adjacent shaking table units face the opening, one end of the discharging pipe is in communication with the lower end of the material channel, and the other end of the discharging pipe is parallel to the screening surface of the lower adjacent shaking table units. Compared with the prior art, the multi-layer hydraulic shaking table for ore dressing provided in the present utility model is provided with a material conveyor between every two adjacent shaking table units, and a discharging pipe of the material conveyor is parallel to a screening surface of each shaking table unit, such that ores can be in contact with the screening surface at a very small included angle, thereby greatly reducing the splashing amplitude of the ores.
B03B 5/04 - Lavage de matériaux en grains, en poudre ou en grumeauxSéparation par voie humide en utilisant comme moyens principaux de séparation, des lits secoués, pulsés ou agités sur des tables à secousses
brevets
