A stirring device for stirring a particulate material and a grinding media in a grinding mill includes one or more protective elements that extend outwardly from a body to deflect said particulate material and said grinding media from the body.
A stirring impeller (1), an arrangement, and a use. The impeller (1) comprises a hub disc (2) comprising a shaft attachment structure (3) arranged centrally in the hub for receiving a shaft (4) centrally and perpendicularly from an upper side of the hub disc (2), a plurality of upper blades (5) arranged on the upper side of the hub disc (2), and a plurality of lower blades (6) arranged on a lower side of the hub disc (2). At least one of said plurality of upper blades (5) is arranged to have jet angle (Ju) of 5°- 45°, and the lower blades (6) have a jet angle (Jl) that is different than said jet angle (Ju) of least one of said plurality of upper blades.
B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
B01F 7/22 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a vertical axis with propellers
B01J 8/22 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
Described is a coated electrode comprising a conductive substrate and a coating, wherein the coating comprises an outer coating composition forming at least one outer coating layer and comprising manganese and iridium. The molar ratio of iridium is at least 10 mol-% and below 40 mol-%, and manganese and iridium are in the form of their oxides. Disclosed is also a method for preparing the coated electrode and use related thereto.
C25B 11/073 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material
C25B 11/053 - Electrodes comprising one or more electrocatalytic coatings on a substrate characterised by multilayer electrocatalytic coatings
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
2333 in concentrated sulfuric acid in an intermediate and a final absorber stage. Therein, the intermediate absorber stage features a pre-absorber and a post-absorber. These two absorbers arranged such that the not-absorbed SO3 leaving the pre-absorber is supplied to a post-absorber and such that the sulfuric acid leaving the post-absorber is split into two streams of which the first stream is recirculated back in the pre-absorber and the second stream is at least partly passed into the post-absorber. The first stream is uncooled directly injected into the pre-absorber with a temperature between 80 and 200 °C, preferably between 100 and 150°C and the second stream passes a cooling and is at least partly fed into the post-absorber with a temperature between 60 and 90 °C.
The invention is directed to a plant and its relating method for producing sulfuric acid. It comprises a source (10), wherein ore and/or a gas is thermally treated to produce amongst others a raw gas containing sulfur dioxide with a concentration below 3.5 vol.-%. Further, it contains a blower (122) for the cleaned gas and a converter (160) with at least one stage filled with a catalyst to convert the contained sulfur dioxide into sulfur trioxide. At least one cooling stage (40) is foreseen, which is arranged upstream the blower (122) to cool the gas to a temperature below 30 °C to reduce its water content, as well as a at least one first heat exchanger (150) arranged between blower (122) and converter (160) or inside the converter (160) to heat the gas such that it enters the converter (160) at elevated temperature, preferably with a temperature above 400 °C. Moreover, it contains a second heat exchanger (20), whereby the heat transfer medium of the second heat exchanger (20) is used to heat the first heat exchanger (150).
B01D 53/00 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
Presented is a fluidizing nozzle (1) for introducing fluid into a fluidized bed reactor (2) and a fluidized bed reactor (2). The fluidizing nozzle comprises a nozzle tube (3) limiting at least a part of a feed channel (4) in which fluid is configured to flow, at least one fluid discharge opening (5) arranged near a downstream end (6) of the nozzle tube (3), and a pot-like hood (7), which sealingly closes the nozzle tube (3) with a hood cover (8) of the pot-like hood (7) at the downstream end (6) of the nozzle tube (3) at which said at least one fluid discharge opening (5) is provided. The feed channel (4) is provided with a flow restriction element (10) defining at least one flow restriction feed channel (11) upstream of said at least one fluid discharge opening (5).
A mixing arrangement (100) for mixing two solutions, a mixer settler unit (200) and a use. The mixing arrangement (100) comprises a mixing device (1) arranged in the mixing space (6) for rotating therein, the mixing device (1) comprising at least two helical bars (2a, 2b) supported around a shaft (3) and rising upwards from the bottom section of the mixing space (6), the helical bars (2a, 2b) being fixed to the shaft (3) with support spokes (4). The ratio of the diameter (D) of the mixing device to the average diameter (T) of the mixing space, that is D/T, is 0.47 at most.
B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
B01F 7/16 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a vertical axis
B01F 7/32 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a vertical axis with openwork frames or cages
C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
A cyclone separator arrangement (100), comprising a preceding apparatus (1) having an outlet (2), and a cyclone separator (3) having an inlet (4). The arrangement (100) further comprises a crossover duct (5) connected to the outlet (2) and the inlet (4) for supplying gas flow comprising particles from the preceding apparatus (1) to the cyclone separator (3). The preceding apparatus (1) has a horizontal inner diameter (D),and a flow channel (6) having a cross-section having a height (H) and a width (d), said width (d) relating to the inner diameter (D) such that 0.15 x D < d < 0.6 x D. The width (d) is a dimension of the flow channel (6) in a horizontal plane crossing the centre of gravity (CF) of a flow-through area of the flow channel (6) at the outlet (2) of the preceding apparatus. The inner diameter (D) is a width of the preceding apparatus (1) in a horizontal plane crossing the centre of gravity (CP) of a flow-through area of the preceding apparatus (1) and being parallel to the width (d) of the flow channel (6). The flow channel (6) is arranged asymmetrically in a horizontal cross-section of the preceding apparatus (1).
B04C 5/103 - Bodies or members, e.g. bulkheads, guides, in the vortex chamber
B04C 9/00 - Combinations with other devices, e.g. fans
B01D 53/24 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by centrifugal force
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
B01J 8/24 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique
F23J 15/02 - Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
9.
ENHANCED RECOVERY OF NICKEL AND COBALT FROM LATERITES
The present invention relates to an arrangement and method for extracting metals from nickel-containing laterites, comprising the acid treatment of a ground laterite material, the separate heat treatment of an obtained acid-containing laterite mixture by adding super-heated steam, the leaching of a heat-treated laterite mixture, the separation of remaining solids from the pregnant leach solution (PLS), one or more precipitations, in order to form one or more product fractions, and the recovery of one or more product fractions.
Described is a method and a system for treating fluid (3). The method comprises a fluid feeding step for feeding fluid (3) in a fluid feeding pipe (1) into a fluid reactor vessel (2), a bubbles feeding step for feeding bubbles of first fluid mixture (4) containing first carrier fluid and first active fluid into fluid (3) flowing in the fluid feeding pipe (1) by means of a sparger apparatus (5). The method comprises a fluid mixture analyzing step for measuring the relative content of first active fluid in the first fluid mixture (4) with a first fluid analyzer (22) and controlling a first active fluid source (23) with the first fluid analyzer (22) in response to the relative content of first active fluid in the first fluid mixture (4) as measured by the first fluid analyzer (22).
C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
C02F 1/78 - Treatment of water, waste water, or sewage by oxidation with ozone
C02F 1/32 - Treatment of water, waste water, or sewage by irradiation with ultraviolet light
B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
B01F 3/04 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed gases or vapours with liquids
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
11.
DOUBLE SHAFT PADDLE MIXER AND ARRANGEMENT AND METHODS FOR PRODUCING PASTE
Described is double shaft paddle mixer, comprising a barrel chamber (1), and a first paddle screw (2) and a second paddle screw (3). The first paddle screw (2) is provided with first paddles (4) and the second paddle screw (3) is provided with second paddles (5). The barrel chamber (1) comprising a crushing zone (6) and a mixing zone (7). The crushing zone (6) is partly separated from the mixing zone (7) by a partition member (8). A first inlet (9) is connected to the crushing zone (6) and a second inlet (10) is connected to the mixing zone (7) and an outlet (11) connected to the mixing zone (7). Described is also an arrangement and methods for producing paste.
B01F 7/02 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
B01F 7/04 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles or arms
B29B 7/48 - MixingKneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
12.
A VENTURI ABSORBER TUBE FOR ABSORBING SULFUR TRIOXIDE IN SULFURIC ACID
The invention relates to a venturi absorber tube for absorbing sulfur trioxide in sulfuric acid. Said venturi features a converging section (20), a throat section (30) and a diverging section (40) as well as a first conduit (21) at its top through which hot pro-cess gas containing sulfur trioxide is introduced. Further, the venturi shows a device for introducing sulfuric acid (22) by spraying sulfuric acid co-currently to the sulfur trioxide gas stream, a conduit (52) to withdraw liquid parts and a conduit (51) to withdraw gaseous parts. As the essential part of the invention, an internal device (60) located in or below the diverging section (40), which is a sieve tray, a multi-venturi array or a self-supporting dome featuring a convex shape.
B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
The invention relates to an apparatus for treating aluminum comprising at least one device for mixing (20, 22, 30. 40) aluminum ore with limestone and sodium and/or potassium carbonate to obtain a mixture and a calcination reactor (60) for producing the calcine. A circulating fluidized bed reactor (50) is arranged between the device for mixing(20, 22, 30. 40) and the calcination reactor (60) and in which the mixture is pre-calcined.
B01J 8/20 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles with liquid as a fluidising medium
B01J 8/22 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
14.
ARRANGEMENT AND METHOD FOR RECOVERING LITHIUM HYDROXIDE
The present invention relates to an arrangement and a method for recovering lithium hydroxide from a fresh feed comprising a mineral raw material containing lithium or a raw material containing lithium carbonate, or a mixture of these raw mate- rials,combined with a recycled solution and/or slurry containing lithium, by pulping the feed in the presence of water and alkali metal carbonate,leaching the obtained slurry twice, first at an elevated temperature, and secondly in an aqueous solution containing alkali earth metal hydroxide, separating the thus obtained slurry into solids that may be discarded,and a solution containing lithium hydroxide,whereby lithium hydroxide mono hydrate can be recovered from the solution by crystallising, and finally separating the solution and/or slurry obtained during the crystallization from the process and recycling it to one or more previous step, including the pulp- ing step,and optionally the first leaching step.
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
A method for treating process water of a flotation arrangement (1) is disclosed, the flotation arrangement comprising flotation arrangement (1) comprising a mineral flotation line (10) and a process water treatment arrangement (20) for treating underflow of the mineral flotation line. The method comprises the steps of a) dewatering underflow from the flotation in a gravitational solid-liquid separator (21); b) subjecting supernatant (221) from step a) to cleaning flotation for collecting at least fine particles and residual flotation chemicals, for separating at least fine particles and residual flotation chemicals from the supernatant into cleaning flotation overflow (232), and for forming purified process water (231) as cleaning flotation underflow; c) removing cleaning flotation overflow (232) as tailings, and d) recirculating purified process water (231) into the mineral flotation line (10).
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
An autoclave (100) for pressure oxidation of a slurried material comprising at least one sulfide material, and a method.The autoclave (100) comprises a pressure vessel (1) for receiving said slurried material. The pressure vessel (1) comprises compartments (2a –2d) being arranged horizontally one after the another and separated by divider (s) (3). The divider (3) is provided with an upper edge (4) or at least one opening that defines level (L) of the slurried material in the compartment (2a -2d). An inlet (15) is arranged for feeding oxygen containing gas into the pressure vessel (1). An agitator arrangement (6a – 6d) is arranged for agitating said slurried material in at least one of the compartments (2a –2d), the agitator arrangement (6a –6d) comprising at least an upper impeller (7) and a lower impeller (8), the impellers arranged in a vertically aligned shaft (9). The upper impeller (7) arranged at a height above the mid-level (M) of said one of the compartments (2a –2d), and the upper impeller (7) is an upward pumping axial or mixed flow impeller.
A feedwell apparatus trough, plant and use. The apparatus is adapted to materials comprising liquids carrying suspended particles, such as slurry containing minerals. The feedwell apparatus (100) comprises - a supply channel (1) for receiving the material, - a trough (2), a first end (2a) of which being connected in fluid communication with the supply channel (1), the trough (2) comprising a curved shape that turns in one direction, and - plurality of through-openings (3) in the wall(s) (4) of the trough (2).The through- openings (3) are arranged in the trough (2) in unequal pattern such that area of the through-openings (3) in proportion to the corresponding area of the walls (4) has its minimum value in portion of the trough (2) close to the first end (2a) thereof, and said relation being arranged to grow with the distance from the first end (2a).
A flotation cell for treating particles suspended in slurry is disclosed. The flotation cell comprises a fluidized bed (10), a recovery zone(20) at the upper part (13) of the flotation cell, a launder lip (26) and a recovery launder (24), and a tailings outlet (12). A primary slurry feed (100) comprising fresh slurry is arranged to be fed into the flotation cell by a first feed inlet (14) at a first position (P); and a secondary slurry feed (200) comprising at least slurry recirculated from a flotation cell is arranged to be fed into the fluidized bed by a second feed inlet (15) at a second position (S), below the first position. The slurry recirculated from the flotation cell is obtained at a third position (R) between the recovery launder and the tailings outlet. A use of the flotation cell as well as a method for treating particles suspended in slurry are also disclosed.
A flotation cell (1) for treating particles suspended in slurry is disclosed. The flotation cell comprises a fluidized bed (10);a recovery zone (20) at an upper part (13) of the flotation cell; a launder lip (26) and a recovery launder (24); a tailings outlet (12) arranged below the recovery launder;and a first feed inlet (14) arranged to supply a primary slurry feed (100) comprising fresh slurry into the fluidized bed at a first position (P). The flotation cell has a height (H) measured from the bottom (110) of the flotation cell to the launder lip. The flotation cell is characterized in that it comprises an agitator (18) arranged adjacent to the bottom of the fluidized bed.
A flow distributor (1) is disclosed,comprising a number of vertically stacked modules (10); openings (12) defining a fluid flow conduit (13) through the flow distributor, the openings formed between at least some of the modules stacked adjacent to each other; and at least one supporter (11). A module (10) comprises a connector (14) for aligning and releasably connecting a module (10a) to an adjacent module (10b, 10c) to form a vertical stack of inter- changeable modules (10) held together by the supporter. Further, a method for manufacturing a flow distributor, a tank comprising at least one flow distributor, as well as uses of a flow distributor, are disclosed.
A reactor for gas-liquid mass transfer between a gas and a liquid or slurry includes a tank for receiving the liquid or slurry having a wall; a drive shaft; an upward pumping impeller; and an aerating apparatus disposed above the upward pumping impeller and extending between the drive shaft and the wall of the tank at a first distance (d1) from the drive shaft and at a second distance (d2) from the wall of the tank, the aerating apparatus encircling the drive shaft at least partially. The aerating apparatus has an outward inclined or curved inner surface for directing at least a part of the flow over the inner surface.
The disclosure relates to a horizontal plate pressure filter (1), comprising a plurality of superimposed filter plates (2) for forming filter chambers between at least two adjacent filter plates An opening actuator arrangement (5) provides an opening movement and a closing movement, and an opening mechanism (6) is coupled to the opening actuator arrangement (5) and is configured to mechanically transmit the opening movement and the closing movement. Particularly, the opening mechanism (6) extends vertically at a plurality of distinct positions, (4), and the opening actuator (5) arrangement comprises an electric motor (5a) mechanically operationally coupled to the opening mechanism (6), at a plurality of distinct positions thereof.
A horizontal plate pressure filter (1), comprising a plurality of superimposed filter plates (2) for forming a filter chamber between at least two adjacent filter plates. An opening actuator arrangement (5) provides an opening movement and a closing movement, and an opening mechanism (6) configured to mechanically transmit the opening movement and the closing movement. Particularly, the opening actuator arrangement (5) comprises an electric motor (5a). The horizontal plate pressure filter further comprises a tail plate (8) arranged below the lowermost filter plate (2), and a press actuator arrangement (9) for pressing the tail plate (8) towards the filter plates (2) so as to compress the filter plates (2) between the head plate (3) and tail plate (8) in order to seal said filter chambers.
A horizontal plate pressure filter (1), comprising a plurality of superimposed filter plates (2) for forming a filter chamber between at least two adjacent filter plates. An opening actuator arrangement (5) provides an opening movement and a closing movement, and an opening mechanism (6) configured to mechanically transmit the opening movement and the closing movement. Particularly, the opening actuator arrangement (5) comprises an electric motor (5a). The horizontal plate pressure filter further comprises a tail plate (8) arranged below the lowermost filter plate (2), and a press actuator arrangement (9) for pressing the tail plate (8) towards the filter plates (2) so as to compress the filter plates (2) between the head plate (3) and tail plate (8) in order to seal said filter chambers.
The disclosure relates to a horizontal plate pressure filter (1), comprising a plurality of superimposed filter plates (2) for forming filter chambers between at least two adjacent filter plates An opening actuator arrangement (5) provides an opening movement and a closing movement, and an opening mechanism (6) is coupled to the opening actuator arrangement (5) and is configured to mechanically transmit the opening movement and the closing movement. Particularly, the opening mechanism (6) extends vertically at a plurality of distinct positions, (4), and the opening actuator (5) arrangement comprises an electric motor (5a) mechanically operationally coupled to the opening mechanism (6), at a plurality of distinct positions thereof.
The invention deals with a plant with at least two of parallel reactors each being fed with at least one reactant with a time depending feed rate and its relating control unit. The control unit is configured to communicate at least one control variable to the reactors. The control variable comprises a feed target, which is a threshold value regarding the specific feed rate of each reactor, while a total feed target is stored in the control unit as an upper boundary value. The sum of the feed targets communicated to reactors is lower or equal to the total feed target. The control unit is configured to read actual feeds from the plurality of reactors, and depending on the actual feed rate and the feed target, to interpret each reactor as inquiring a higher, the same or a lower feed target, and to decrease the feed target for a reactor that inquires a lower feed target and increase the feed target for a reactor that inquires a higher feed target under the condition that the sum of the feed targets does not exceed the total feed target. The invention also covers the relating method.
In a method for removing Si based compounds from a leaching liquor, the method comprises supplying the leaching liquor (2) from a leaching step (1) to a gravitational solid-liquid separator (3) for separating an overflow (4) and an underflow (15), supplying an overflow (4) from the gravitational solid-liquid separator (3) to a reactor (6) for forming a treated liquor (9), adding a source of aluminium (5) as a first coagulant to the overflow (4) in the reactor (6) for forming aluminium silicate containing particles in the treated liquor (9), adding at least a flocculant (7) to the treated liquor (9) after the reactor (6) for increasing particle size of the aluminium silicate containing particles, and supplying the treated liquor (9) to cleaning flotation in which at least 90 % of the flotation gas bubbles display a size from 0.2 to 250 pm in a cleaning flotation unit (10) for collecting at least the aluminium silicate containing particles, for separating at least the aluminium silicate containing particles from the treated liquor (9) into a cleaning flotation overflow and for forming a purified liquor (11) as a cleaning flotation underflow.
A method of treating process water of a flotation plant (1) is disclosed. The flotation plant (1) comprises a mineral flotation line (10) and a process water circuit (20) for treating underflow and/or overflow of the flotation line. The process water circuit comprises a gravitational solid-liquid separator (21) for dewatering underflow and/or overflow of the mineral flotation line to separate sediment (212) from supernatant (211) comprising at least water and unrecovered fine particles comprising valuable material; and a recover water tank (25) for collecting process water (500). According to the method, prior to leading supernatant (211) from the gravitational solid-liquid separator (21) into the recover water tank (25), it is subjected to cleaning flotation, in which at least 90 % of the flotation gas bubbles have a size from 0,2 to 250 µm, in a cleaning flotation unit (23). An arrangement for treating process water of a flotation plant, and its use arealso disclosed.
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
31.
Automatic quick response temperature measurement for rotary kilns
A device for measuring the temperature in a rotary kiln through which solid material passes being heated to elevated temperatures. The device features a drive as well as an elongated hollow body with means to fix a thermocouple, whereby the drive and the elongated hollow body are mounted such that they rotate jointly with the rotary kiln. The drive can move the elongated hollow body together with thermocouple through an opening in and out of the rotary kiln interior for measuring the temperature inside the rotary kiln during operation.
F27B 7/42 - Arrangement of controlling, monitoring, alarm or like devices
F27D 9/00 - Cooling of furnaces or of charges therein
G01K 7/02 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using thermoelectric elements, e.g. thermocouples
F27D 21/00 - Arrangement of monitoring devicesArrangement of safety devices
The invention describes a method for controlling pellet quality in iron ore production, comprising the steps of mixing water, binder and iron ore particles in at least one mixer to form a mixture (step (i)) and pelletizing the mixture into green pellets (step (ii)). Between step (i) and step (ii), a part of the mixture is taken in a sampling operation, formed into a test specimen and subjected to a test.
22, fine particles, microbes, and residual flotation chemicals; b) subjecting the supernatant (211) to cleaning flotation, in which at least 90 % of the flotation gas bubbles have a size from 0,2 to 250 μm, in a cleaning flotation unit (23) for collecting at least silica-containing particles, for separating at least silica-containing particles from the supernatant into cleaning flotation overflow (232), and for forming purified process water (231) as cleaning flotation underflow; c) removing cleaning flotation overflow (232) as tailings; and d) recirculating purified process water (231) into the mineral flotation circuit (10). A process water treatment arrangement (20) is also disclosed.
An open-ended grinding mill (1) comprises a drum (2) comprising a cylindrical shell (3), wherein the longitudinal axis (4) of the drum is arranged in a substantially horizontal position in a use position of the grinding mill (1). The drum (2) comprises a first end (5) at the feed end of the shell and a second end (6) at the discharge end of the shell. The grinding mill further comprises a bearing (8) supporting the drum at the second end, and a support structure (9) to connect the drum (2) to the bearing (8). The support structure is configured to provide a wall external to the shell, whereby the shell and the support structure provide a double-wall structure separating the bearing from the inside of the drum.
B02C 17/18 - Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls Details
35.
AN INSULATOR ELEMENT FOR SPACING ADJACENT ELECTRODE PLATES, AN ELECTRODE PLATE AND AN ELECTOLYSIS CELL
An insulator element (1) for spacing adjacent electrode plates from each other, comprising an engaging portion (2) having a longitudinal groove (2a) for receiving an edge portion (4a) of an electrode plate (4), and a spacing portion (3) adjacent to the engaging portion (2), extending from the engaging portion (2) towards a direction opposite to an opening direction of the groove (2a), for spacing electrode plates (4) from each other. The spacing (3) portion has a width, defined in a direction between opposite sides of the groove, being greater than that of the groove (2a). Particularly the groove (2a) is equipped with at least one locking stud (5) resiliently extending from at least one opposite side (2a'; 2a'') of the groove (2a) towards the other (2a''; 2a'), for engaging a corresponding recess (4b) on the electrode plate (4). An electrode plate (4) and an electrolysis cell (8) are also concerned.
A flotation cell (1) for treating particles suspended in slurry and for separating the slurry into an underflow (400) and an overflow (500) is disclosed. The flotation cell comprises a flotation tank (10) comprising a centre (11), a perimeter (12), a bottom (13), and a side wall (14); and a launder (2) and a launder lip (21) surrounding the perimeter (12) of the flotation tank. The flotation tank further comprises blast tubes (4) for introducing slurry infeed (100) into the flotation tank. A flotation line, as well as a use of the flotation line is also disclosed.
The invention describes a reactor for the combustion of sulfur. The reactor's walls (23) form a symmetrical base area b, whereby at least two burners (2, 2') are mounted each with a burner holding device (22). All burner holding devices (22) have the same distance to each other and each burner holding device (22) has the same distance to the a center point z of the base area b. At least one burner holding device (22') is arranged such that during operation the flame of said burner (2') shows an angle a between 0 and 45° to a center axis a, which is defined as the shortest connection between this burner holding device (22') and the center point z.
A flotation cell (1) for treating particles suspended in slurry and for separating the slurry into an underflow (400) and an overflow (500) is disclosed. The flotation cell comprises a flotation tank (10) with a centre (11), a perimeter (12), a bottom (13), and a side wall (14); and a launder (2) and a launder lip (21) surrounding the perimeter (12) of the flotation tank. The flotation tank further comprises blast tubes (4) for introducing slurry infeed (100) into the tank, a blast tube comprising an inlet nozzle (41), an inlet (42) for pressurized gas, an elongated chamber (40) and an outlet nozzle (43). The outlet nozzle is positioned at a vertical distance (L5) from the launder lip, the distance (L5) being at least 1,5 m. In addition, a flotation line and use of the flotation line are disclosed.
A flotation line for treating mineral ore particles suspended in slurry is disclosed. The flotation line (10) comprises a scavenger part (12) and a scavenger cleaner part (13). The flotation line is characterized in that the scavenger part (12) or the scavenger cleaner part (13) comprises a flotation cell (200) with blast tubes (4) for introducing slurry infeed (100) into the flotation cell; or in that the scavenger part (12) or the scavenger cleaner part (13) is followed by a flotation cell (200) with blast tubes (4) for introducing slurry infeed (100) into the flotation cell.Further, a use of the flotation line is presented, as well as a flotation plant (1) comprising a flotation line (10) according to the invention.
fff) towards the launder lip (21); as well as blast tubes (4) for introducing slurry infeed (100) into the flotation tank. In addition, a flotation line and use of the flotation line are disclosed.
A flotation cell (1) is disclosed for treating particles suspended in slurry and for separating the slurry into an underflow (400) and an overflow (500). The flotation cell comprises a flotation tank (10) with a centre (11), a perimeter (12), a substantially horizontal level bottom (13), and a side wall (14); a launder (2) and a launder lip (21) surrounding the perimeter (12) of the tank (11); and a bottom structure (7) arranged on the bottom (13), and having a shape that allows particles suspended in slurry to be mixed in a mixing zone (A) over the bottom structure, and to settle down in a settling zone (B) surrounding the bottom structure. The flotation tank further comprises blast tubes (4) for introducing slurry infeed (100) into the tank. In addition, a flotation line and use of the flotation line are disclosed.
The invention is directed a device for cooling a fine-grained solid, comprising a fluidized bed cooler / heater (10) with or without cooling elements in which the solid is fluidized with a fluidizing gas and thereby releases energy in the form of heat Within the cooler / heater (10) at least two cyclones (20 a, 20b, 20c) which are connected in parallel. The cyclones (20a, 20b, 20c) are arranged such that after the fluidization of the solid the fluidizing gas passes through the cyclones (20a, 20b, 20c) so contained particles are removed.
B01J 8/26 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
F27B 15/00 - Fluidised-bed furnacesOther furnaces using or treating finely-divided materials in dispersion
B01J 8/18 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles
B01D 45/12 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
A method and arrangement for recovering lithium hydroxide from a raw material containing lithium, which method comprises pulping (1) the raw material containing lithium in the presence of water and an alkali metal carbonate for producing a first slurry containing lithium from the raw material containing lithium. After pulping the lithiumcontaining first slurry is leached (2) for a first time thus producing a second slurry containing lithium carbonate, followed by a second leaching (3) for producing a third slurry containing lithium hydroxide. After pulping and said two leaching steps the method comprises a separation (31) of the solids from the solution. Crystals of lithium hydroxide monohydrate are then recovered by crystallizing (4).
The present invention relates to a method and arrangement for recovering lithium hydroxide from a mineral containing lithium, by pulping the raw material containing lithium in the presence of water and an alkali metal carbonate,leaching the obtained slurry twice, first at an elevated temperature, and secondly in an aqueous solution containing an alkali earth metal hydroxide, separating the thus obtained slurry into solids and a solution containing lithium hydroxide, the latter being purified, whereby lithium hydroxide monohydrate can be recovered from the purified solution by crystallising, and finally separating the solution obtained during the crystallization from the process and recycling it to one or more of the previous process steps.
A flotation cell for treating particles suspended in slurry is disclosed. The flotation cell comprises a flotation tank (10) comprising a centre (11), a perimeter (12), and a sidewall (13); a launder (2) and a launder lip (21) surrounding the perimeter (12) of the tank (11); and a downcomer (4). Aheight- to-diameter ratio of the flotation cell is 0,9 or lower. The downcomer (4) comprises an inlet nozzle (41) for feeding slurry infeed into the downcomer; an inlet (42) for pressurized air; an elongated chamber (40) arranged to receive under pressure the slurry infeed; and an outlet nozzle (43) configured to restrict the flow of slurry infeed from the outlet nozzle, and to maintain slurry infeed in the elongated chamber under pressure.In addition, a flotation line and use of the flotation line is disclosed.
An X-ray fluorescence analyser comprises an X-ray tube (402) for emitting incident X-rays (206) in the direction of a first optical axis (204). A slurry handling unit (201) is configured to maintain a constant distance between a sample (202) of slurry and said X-ray tube. A first crystal diffractor (601) is located in a first direction from said slurry handling unit (201), and configured to separate a predefined first wavelength range from fluorescent X-rays (207) that propagate into said first direction. It is configured to direct the fluorescent X-rays in the separated predefined first wavelength range to a first radiation detector (602, 505). The input power rating of said X-ray tube (402) is at least 400 watts. The first crystal diffractor (601) comprises a pyrolytic graphite crystal (603). The optical path between said X-ray tube (402) and said slurry handling unit (201) is direct with no diffractor therebetween.
G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
B03B 13/06 - Control arrangements specially adapted for wet- separating apparatus or for dressing plant, using physical effects using absorption or reflection of radioactive emanation
G21K 1/06 - Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction, or reflection, e.g. monochromators
An X-ray fluorescence analyzer comprises an X-ray tube (402) for emitting incident X-rays (206) in the direction of a first optical axis (204). A slurry handling unit (201) is configured to maintain a constant distance between a sample (202) of slurry and said X-ray tube. A first crystal diffractor (601) is located in a first direction from said slurry handling unit (201),and configured to separate a predefined first wavelength range from fluorescent X-rays (207) that propagate into said first direction. The first crystal diffractor is configured to direct the fluorescent X-rays in the separated predefined first wavelength range to a first radiation detector (602, 1505). The first crystal diffractor (601) comprises a pyrolytic graphite crystal (603, 802, 804) that has a diffractive surface (801, 803, 805),which is a simply connected surface. Said first radiation detector (602) is a solid-state semiconductor detector.
G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
B03B 13/06 - Control arrangements specially adapted for wet- separating apparatus or for dressing plant, using physical effects using absorption or reflection of radioactive emanation
G21K 1/06 - Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction, or reflection, e.g. monochromators
X-ray fluorescence analyzer system comprises an X-ray tube (402),a slurry handling unit (201),and a crystal diffractor (601) located in a first direction from said slurry handling unit (201). The crystal diffractor (601) separates a predefined wavelength range from fluorescent X-rays (207) that propagate into said first direction, and directs the fluorescent X-rays in the separated predefined wavelength range to a radiation detector (602, 1605). The crystal diffractor (601) comprises a pyrolytic graphite crystal (603). Said predefined wavelength range comprises characteristic fluorescent radiation of a predefined element of interest with its atomic number Z between 41 and 60 the ends included. An energy resolution of said radiation detector (602, 1605) is better than 600 eV at the energy of said characteristic fluorescent radiation.
G01N 23/207 - Diffractometry, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
G21K 1/06 - Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction, or reflection, e.g. monochromators
An X-ray fluorescence analyzer comprises an X-ray tube (402) for emitting incident X-rays (206) in the direction of a first optical axis (204). A slurry handling unit (201) is configured to maintain a constant distance between a sample (202) of slurry and said X-ray tube. A first crystal diffractor (601, 1501) is located in a first direction from said slurry handling unit (201). It comprises a first crystal (603, 1502) and a first radiation detector (602, 1505) configured to detect fluorescent X-rays diffracted by said first crystal (603, 1502) at a first energy resolution. A second crystal diffractor (1511) is located in a second direction from said slurry handling unit (201). It comprises a second crystal (1512) and a second radiation detector (1515) configured to detect fluorescent X-rays diffracted by said second crystal (1512) at a second energy resolution. Said first crystal (603, 1502) is a pyrolytic graphite crystal, said second crystal (1512) is of a material other than pyrolytic graphite, and said first and second crystal diffractors are configured to direct to their respective radiation detectors characteristic fluorescent radiation of a same element.
G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
B03B 13/06 - Control arrangements specially adapted for wet- separating apparatus or for dressing plant, using physical effects using absorption or reflection of radioactive emanation
G21K 1/06 - Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction, or reflection, e.g. monochromators
A method for thermal treatment of bulk material, whereby the bulk material passes in at least one drying zone, one preheating zone, one firing zone and a cooling zones via a travelling grate chain. The travelling grate chain is capable of revolving in direction of movement comprising an endless travelling grate with moveable links. It features a plurality of grate carriages each consisting of a frame with wheels and grate rods being arranged on crossbars. Gas flows through the grate carriages and their grate rods from or into wind boxes. From a wind box in the cooling zone, which is installed downwards of a first wind box of the cooling zone and which sucks the cooling gas medium in, the cooling gas is recirculated via a recycling conduit featuring at least one fan into one wind box of the drying zone. Downwards of the fan, parts of the cooling gas are branched off via a bypass conduit and led back into the wind box of the first cooling zone blowing the gas medium. The cooling gas in the recycling and the bypass conduit is controlled with at least one pressure control valve, which enables draining of cooling gas as an exhaust.
A froth flotation cell (10) for treating mineral ore particles suspended in slurry (100) is presented,comprising a tank (11),a gas supply (12), a first froth collection channel (21), a second froth collection channel (22) arranged between the centre (111) of the tank (11) and the first froth collection channel (21), and a radial froth collection launder (23) comprising a radial froth overflow lip (123a), and extending from the first froth collection channel (21) towards the second froth collection channel (22). The froth flotation cell (10) further comprises a radial froth crowder (31) comprising a crowding sidewall (310), and extending from the second froth collection channel (22) to the first froth collection channel (21).Further, a froth flotation line (1), its use and a froth flotation method are presented.
A flotation line (10) for treating mineral ore particles suspended in slurry is disclosed. The flotation line (10) comprises a rougher part (11) with at least one rougher flotation cell (111 a, 111 b) from which overflow is arranged to flow directly into a cleaner flotation line; and a scavenger part (12) with at least two scavenger flotation cells (112a, 112b) from which overflow is arranged to flow back into a rougher flotation cell (111 a, 111 b), or into a regrinding step (91) and then into a cleaner flotation line. Underflow from a last scavenger flotation cell is arranged to be removed from the flotation line (10) as tailings. At least 75 % of the flotation cells comprise a mechanical agitator (70) comprising a system for introducing flotation gas into the flotation cell. The flotation cells are connected in series and arranged in fluid communication. A subsequent flotation cell is arranged to receive underflow from a previous flotation cell. At least one of the flotation cells of the flotation line comprising a mechanical agitator (70) comprises a microbubble generator (60) for introducing microbubbles into the slurry.
A reactor (1) for gas-liquid mass transfer between a gas (2) and a liquid or slurry (3) is disclosed, the reactor comprising a tank (4) for receiving the liquid or slurry, the tank having a wall (5); a drive shaft (6) extending vertically in the tank and rotatable about a vertical axis (7); an upward pumping impeller (8) for creating a flow of the liquid or slurry received in the tank generally upward and at the surface (9) of the liquid or slurry; and an aerating apparatus (10) disposed above the upward pumping impeller and extending between the drive shaft and the wall of the tank at a first distance (d1) from the drive shaft and at a second distance (d2) from the wall of the tank, the aerating apparatus encircling the drive shaft at least partially. The aerating apparatus has a lower edge (11) and an upper edge (12) and, extending between the lower edge and the upper edge, an outward inclined or curved inner surface (13) for directing at least a part of the flow over the inner surface outward from the vertical axis and over the upper edge.
B03D 1/22 - Flotation machines with impellersSubaeration machines with external blowers
B01J 19/18 - Stationary reactors having moving elements inside
B01J 8/22 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
B01F 3/04 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed gases or vapours with liquids
C02F 1/24 - Treatment of water, waste water, or sewage by flotation
A method for recovering at least one precious metal from an aqueous solution containing the metal and particularly to recovery of silver and optionally one or more other precious metals from overflow of a sedimentation unit such as a thickener, a clarifier or a pond includes subjecting the aqueous solution to a micro and/or nanobubble flotation, wherein the pH of the aqueous solution is at most 1.5.
222 is quenched prior to passing into a packed bed tower and is then fed into at least one electrostatic precipitator. The condensate from the at least one electrostatic precipitator is separately withdrawn and guided into a effluent water treatment plant.
B01D 53/32 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by electrical effects other than those provided for in group
Process for thermal decomposition of aluminium chloride hydrate into aluminium oxide and gaseous hydrogen chloride comprising step (i)of partially decomposing the aluminum chloride hydrate into a decomposition reactor by heating to a temperature between 600 and 800 °C and step (ii) of calcining the partially decomposed aluminum chloride hydrate in the calcining zone to aluminium oxide at a temperature between 850 and 1200 °C. The aluminium oxide is passed from step (ii) to step (i) where it is used as a heat transfer medium.
A backfill slurry sampling apparatus (1), in which a sample portion of a backfill slurry flow is conducted to a sampling line (3) via a sampling valve (4). A sample positioning means (5) is provided, comprising a plurality of receptacle holders (6) for detachably receiving and carrying sample receptacles (5a, 5b, 5c), said sampling positioning means being arranged for selectively positioning each of receptacle holders (6) separately between a feed position (6a), and a stowed position (6b, 6c). Control means (7) are provided for operating the sampling valve (4) and the sample positioning means (5). An engaging member (4a) of the sampling valve (4) is positioned, when the fluid communication between the backfill feed line (2) and the sampling line (3) is closed, within an interaction-region of the backfill slurry flow in the backfill feed line (2), thus preventing backfill slurry build-up forming on said engaging member (4a).
G01N 1/20 - Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
E21F 15/08 - Filling-up hydraulically or pneumatically
E21B 33/13 - Methods or devices for cementing, for plugging holes, crevices or the like
G01N 35/02 - Automatic analysis not limited to methods or materials provided for in any single one of groups Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
B28C 9/00 - General arrangement or layout of plant
G01N 1/10 - Devices for withdrawing samples in the liquid or fluent state
The invention relates to a device (10) for measuring the temperature in a rotary kiln (30) through which solid material passes being heated to elevated temperatures. Said device (10) features a drive (20) as well as an elongated hollow body (11) with means to fix a thermocouple (12), whereby the drive (20) and the elongated hollow body (11) are mounted such that they rotate jointly with the rotary kiln (30). The drive (20) can move the elongated hollow body (11) together with thermocouple (12) through an opening (31) in and out of the rotary kiln interior (32) for measuring the temperature inside the rotary kiln (30) during operation.
The invention is directed to a method and its related plant for the thermal treatment of iron containing oxide, in which fine-grained solids are heated in a preheating calcining stage and are exposed to a reduction gas in a subsequent reduction stage. Off-gas from the reduction stage is guided through a separation device wherein the water originating from the reduction stage is separated. The off-gas from the preheating calcining stage is guided through a venturi scrubber and a packed bed section downstream of the venturi scrubber to condense water vapor.
Presented is a feed mixture distribution device (1) configured to evening out a feed of feed mixture in an annular feed mixture feed channel (2) of a burner (3). The feed mixture distribution device (1) comprises a cylindrical member (4) having a cylindrical wall (5), a first end (6), a second end (7), and a longitudinal central axis X. The cylindrical member (4) is at the first end (6) provided with rectangular flat plate means (8), which extend radially from the cylindrical wall (5) of the cylindrical member (4) and which are arranged symmetrically about the longitudinal central axis X of the cylindrical member (4). The cylindrical wall (5) of the cylindrical member (4) is between the rectangular flat plate means (8) and the second end (7) provided with helical plate means (10) arranged symmetrically about the longitudinal central axis X of the cylindrical member (4).
Described is a liquid filtration apparatus comprising a series of upright filter plates (1) forming a filter plate pack. Filtering spaces (2) are formed in the filter plate pack. The liquid filtration apparatus comprises in at least one filtering space (2) a filter chamber (3) that is at least partly limited laterally by a filter media (4). Said at least one filtering space (2) has an elongated bottom discharge opening (5) at a level below the filter chamber (3). The elongated bottom discharge opening (5) is provided with a first openable and closable hatch arrangement (7) and with a second openable and closable hatch arrangement (12) extending across the elongated bottom discharge opening (5).
The disclosure relates to a liquid filtering apparatus (1), having a gravitationally dischargeable filter chamber (3) that is immovable at least during discharge of a filter cake. A filter medium element (4) is provided comprising: a jacket (4a) having, when in use, a vertically extending closed circumference defining an inner space, so as to at least laterally limit the filter chamber (3), and a feed opening (4b) and a discharge opening (4c). A drainage arrangement (2a) is also provided, configured to receive filtrate from the filter chamber (3) through the filter medium element (4), and a compression arrangement (2b) configured to apply compression to the filter chamber (3) externally of the filter medium element (4). A key (5), a filter medium element (4), and methods for operating and servicing are also concerned.
B01D 25/28 - Leaching or washing filter cakes in the filter
B01D 25/133 - Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands with compression of the filter cake, e.g. by inflatable membranes
B01D 25/168 - Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates with compression of the filter cake, e.g. by inflatable membranes
B01D 29/11 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
Described is a liquid filtration apparatus comprising a series of upright filter plates (1) forming a filter plate pack. Filtering spaces (2) are formed in the filter plate pack. The liquid filtration apparatus comprises in at least one filtering space (2) a filter chamber (3) that is at least partly limited laterally by a filter media (4). Each filtering space (2) has an elongate bottom discharge opening (5) limited by two first opposite side walls (38) and is provided with a first inflatable and deflatable hose seal (7) extending across the elongate bottom discharge opening (5) and configured to selectively open and close the elongate bottom discharge opening (5) at the first inflatable and deflatable hose seal (7). The first inflatable and deflatable hose seal (7) in the elongate bottom discharge opening (5) is fastened at one of the first opposite side walls (38) of the elongate bottom discharge opening (5).
Described is a liquid filtration apparatus comprising a series of upright filter plates (1) forming a filter plate pack in which filtering spaces (2) are formed. Each of the filtering spaces (2) has an elongate bottom discharge opening (5) limited by two first opposite side walls (38) and provided with a first inflatable and deflatable hose seal (7). The first inflatable and deflatable hose seal (7) is configured to selectively open and close the elongate bottom discharge opening (5). The liquid filtration apparatus furthermore comprises an inflating and deflating system (17) configured to inflate and deflate the first inflatable and deflatable hose seal (7). The inflating and deflating system (17) comprises a top tank (20) which is arranged at a level above the first inflatable and deflatable hose seal (7) and configured to fill the first inflatable and deflatable hose seal (7) by gravity with fluid.
The disclosure relates to a method of operating a filter press (1), wherein filter material is fed into a filter chamber (2) so as to form a filter cake between at least two sides of a flexible filter medium (3). Filtrate is received from the filter chamber (2) and a filter cake formed in the filter chamber (2) is discharged. Prior to discharging the filter cake, compression is applied on the filter cake formed within the filter chamber by providing compression fluid gas at a compression pressure exceeding a prevailing pressure within the filter chamber, directly on a side of the filter medium (3) exterior to the filter chamber (2), so as to exert said compression pressure directly on said side of the filter medium, thereby causing the filter medium (3) to yield against the filter cake. A filter press is also concerned.
B01D 25/12 - Filter presses, i.e. of the plate or plate and frame type
B01D 25/133 - Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands with compression of the filter cake, e.g. by inflatable membranes
B01D 25/168 - Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates with compression of the filter cake, e.g. by inflatable membranes
66.
FACILITY FOR LONGITUDINAL SEALING UP WIND BOXES IN TRAVELLING GRATE FACILITIES
A device for thermal treatment of bulk material, comprising a travelling grate chain being capable of revolving in the direction of movement consisting of an endless travelling grate (1) with movable links. Such a travelling grate chain features a plurality of pallet cars (3), each consisting of a frame (30) with end pieces (33), on which carrying wheels (31) are fixed, and grate rods (35) arranged on crossbars (32). Further, wind boxes (41, 43) are arranged such that from at least one wind box (41, 43) gas flows through the pallet cars (3) and their grate rods (35) from or into the wind boxes (41, 43). At each pallet car (3) of the travelling grate (1) at least one sealing blade (60) each is mounted in parallel to the moving direction and flush with the pallet car (3), whereby at least one sealing box (50) is foreseen in at least one section of the travelling grate (1) in parallel to the moving direction. A liquid medium can be filled into the at least one sealing box (50), wherein the sealing box (50) is arranged such that the sealing blade (60) is immersed in the liquid (L).
Described is a rotary bed-type electric furnace, comprising a rotary bed (1) configured to carry material (2), and a rotator (3) configured to rotate the rotary bed (1) so that material (2) carried on the rotary bed (1) passes through peripheral zones of the rotary bed-type electric furnace. The peripheral zones comprises a feeding zone (4) configured to receive material (2) on the rotary bed (1), a drying zone (8) configured to dry and heat material (2) by means of electrical energy, a heating zone (12) configured to heat material (2) by means of electrical energy, a cooling zone (17) configured lower the temperature of the material (2) and configured to release gases from the material (2), and a discharging zone (19) configured to discharge material (2) from the rotary bed (1) of the furnace.
C21B 13/12 - Making spongy iron or liquid steel, by direct processes in electric furnaces
C21B 13/08 - Making spongy iron or liquid steel, by direct processes in rotary furnaces
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C22B 5/10 - Dry processes by solid carbonaceous reducing agents
F27B 9/16 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatmentFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
F27D 11/00 - Arrangement of elements for electric heating in or on furnaces
The present invention is directed to drawdown cone (1) with a convergent housing (2) comprising a main material inlet (3) on a top side of the drawdown cone (1) and a main material outlet (4) on a bottom side of the drawdown cone (1). At least one rooftop-shaped divider (5, 6) is arranged inside the drawdown cone (1), dividing the drawdown cone (1) into at least two sub-sections.
Described is a sparger apparatus (1) for feeding a first fluid into a second flowing fluid. The sparger apparatus comprises a hollow tube member (2) defining a straight duct flow space (3) having an upstream inlet end (4) and a downstream outlet end (5), and nozzles (6) in the straight duct flow space (3). The nozzles (6) are configured to feed first fluid into second flowing fluid configured to flow in a direction of flow B in the straight duct flow space from the upstream inlet end (4) to the downstream outlet end (5). The openings (10) of the nozzles (6) are distributed at several positions along the direction of flow B so that the openings (10) forms upstream openings and downstream openings and so that each upstream opening is unfollowed by a downstream opening in the direction of flow B.
C02F 1/24 - Treatment of water, waste water, or sewage by flotation
C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
C02F 1/74 - Treatment of water, waste water, or sewage by oxidation with air
C02F 1/78 - Treatment of water, waste water, or sewage by oxidation with ozone
B01J 19/26 - Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
B05B 1/02 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops
B05B 1/14 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openingsNozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with strainers in or outside the outlet opening
70.
SPARGER APPARATUS AND METHOD FOR EXTRACTING PARTICLES
Described is a sparger apparatus (1) for feeding a first fluid into a second flowing fluid. The sparger apparatus comprises a hollow tube member (2) defining a straight duct flow space (3) having an upstream inlet end (4) and a downstream outlet end (5), and nozzles (6) in the straight duct flow space (3). The nozzles (6) are configured to feed first fluid into second flowing fluid configured to flow in a direction of flow X in the straight duct flow space from the upstream inlet end (4) to the downstream outlet end (5). The openings (10) of the nozzles (6) are distributed at several positions along the direction of flow X so that the openings (10) forms upstream openings and downstream openings and so that each upstream opening is unfollowed by a downstream opening in the direction of flow X.
The invention comprises a froth flotation arrangement and method for treating mineral ore particles suspended in slurry. The froth flotation arrangement comprising a flotation cell (1) for separating the slurry (2) into an underflow (3) and an overflow (4), wherein the arrangement comprises: a primary line (18) comprising at least three flotation cells (1) connected in series, wherein each subsequent flotation cell (1) is arranged to receive the underflow (3) from the previous flotation cell (1), the flotation cell (1) comprising a tank (5), and the flotation cell (1) comprising an impeller (7) within the tank (5), and the flotation cell (1) comprising a gas supply (8) within the tank (5), the tank (5) comprising a volume of at least 200 m3, the flotation cell (1) comprising a froth collection launder (15) capable to receive the overflow (4), the froth collection launder (15) comprising a froth overflow lip (14), the flotation cell (1) having an available froth surface area (A froth), the flotation cell having a pulp area (A pulp), where the pulp area (A pulp) is calculated as an average from the cross sectional areas of the tank (5) at the height (hi) of the impeller (7). A ratio between a height (h) from a bottom (13) of the tank (5) to the froth overflow lip (14) of the froth collection launder (15) and the diameter (D) of the tank (5) at the height (hi) of the impeller (7) (h/D ) is less than 1,5. The third flotation cell (1) or subsequent flotation cell (1) in the series has a ratio between an available froth surface area and the pulp area (A froth/A pulp) less than 0,45.
The invention is based on the idea of a froth flotation method for treating mineral ore particles suspended in slurry, comprising a flotation tank for separating the slurry into an underflow (19) and an overflow (20). The arrangement comprises a primary line comprising at least three flotation tanks connected in series, wherein each subsequent flotation tank is arranged to receive the underflow (19) from the previous flotation tank. The method comprising the steps of: feeding a slurry (8) to a tank (2) through a slurry inlet (15), the tank (2) has at least 200 m3frothtottotA frothtottot) in horizontal direction (x) and a square root of an available froth surface area (A froth) is 4-20. The method further comprises the steps of: causing the froth (12) to flow over the froth overflow lip (6) of the froth collection lauder (7) by controlling the froth level (14), wherein the froth overflow lip (6) of the third tank or subsequent tank in the series comprises an edge portion (13) with variable height (h) in the vertical direction (y), and controlling the froth level (14) to be vertically higher than the vertically lowest edge height (h1) of the lip (6) and vertically lower than the vertically highest edge height (h2) of the lip (6), and controlling the slurry level (17) to be lower than the vertically lowest edge height (h1) of the lip (6). The application also relates to a froth flotation arrangement.
A froth flotation unit (10) for treating mineral ore particles suspended in slurry (1) is disclosed. The froth flotation unit comprises a tank (11), a gas supply for introducing flotation gas (2) into the slurry to form froth (3), and a first froth collection launder (21) comprising a first froth overflow lip (121a) facing towards the centre (111) of the tank (11). The froth flotation unit has a pulp area (A) of at least 15 m² measured at a mixing area (140). The froth flotation unit further comprises a second froth collection launder (22) with a first froth overflow lip (122a) facing the perimeter (110) of the flotation tank (11), and a froth blocker (31) arranged between the first froth overflow lip (121a) and the second froth overflow lip (122a). A froth flotation line, its use, and a froth flotation method are also disclosed.
The invention relates to a cyclone for the separation of solid particles and/or at least one liquid from a fluid, featuring a housing (2, 3), an inlet opening (6) for introducing the fluid together with the solid particles and/or the at least one liquid into the housing (2, 3), a discharge port (4) for the solid particles and/or the at least one liquid, a dip tube (12) for discharging the fluid from the housing (2,3), and at least two guide vanes (10a, 10b). Each guiding vanes (10a, 10b) shows a geometrical form with at least three edges e1, e2, e3. Further, each guide vane (10a, 10b) is directly or indirectly fixed to the housing (2, 3) with at least one edge e3 at a fixing point, whereby an area a is defined as the cross-sectional area of the housing (2, 3) intersecting the fixed edges e3. In addition, each guide vane (10a, 10b) shows at least two edges e1 and e2 which are not fixed to the housing (2, 3), whereby the first edge e1 has a distance d1 and the second edge e2 has a distance d2, and whereby d1 < d2 to the centerline c of the housing (2, 3). According to the invention, the first edge e1 shows a distance 11 to the area a and the second edge e2 shows a distance 12, whereby 12 > 1,25*11.
B04C 5/13 - Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamberDischarge from vortex finder otherwise than at the top of the cycloneDevices for controlling the overflow
A froth collection launder for a collection of froth from a mineral flotation, the froth collection launder (1,1a-c) comprising a first (7a) and a second sidewall (7b) which are joined to form a bottom (8) comprising a tip (9) extending along the bottom (8), the first sidewall (7a) comprising a first end (10a) and the second sidewall (7b) comprising a second end (10b) at their open ends, at least one of the first and the second ends (10a, 10b) comprises a froth overflow lip (5), and when the froth collection launder (1, 1a-c) is positioned at its operation position a centre line (11) is located in the middle of the first (10a) and the second end (10b) in the cross direction (x) of the froth collection launder (1,1a-c).The tip (9) is located between the centre line (11) and one of the first and the second end (10a, 10b) in the cross direction (x) of the froth collection launder (1,1a-c) and the tip (9) forms the lowest point of the froth collection launder (1,1a-c).
A method for the heat treatment of granular solids includes initially introducing solids into a first reactor configured as a flash reactor or fluidized bed reactor where they are brought into contact with hot gases at temperatures in the range 500° C. to 1500° C. Next, the solids are passed through a residence time reactor in which they are fluidized. The residence time reactor is configured in a manner such that it has various regions which are separated from one another, from which the solid can be withdrawn in a manner such that it is provided with a variety of residence times in the residence time reactor.
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
B01J 8/18 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles
B01J 8/26 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
B01J 8/34 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with stationary packing material in the fluidised bed, e.g. bricks, wire rings, baffles
B01J 8/36 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed through which there is an essentially horizontal flow of particles
The invention relates to a method and apparatus of preparing lithium compound(s) from lithium-containing mineral. The method comprises a) a leaching step, wherein the lithium-containing mineral is leached in aqueous leach solution containing alkaline carbonate, for liberating lithium and phosphate (s) from the lithium-containing mineral, thus obtaining leach slurry containing lithium carbonate and phosphate (s) leach slurry, b) a carbonization step, wherein the leach slurry containing lithium carbonate and phosphate(s), obtained from the leaching step, is reacted with an alkali earth metal compound in the presence of C02 for obtaining a carbonated slurry containing lithium hydrogen carbonate, and for precipitating phosphate (s) contained in the leach slurry as insoluble phosphate compound(s), c) a solid-liquid separation step, wherein the carbonated slurry obtained from carbonization step is subjected to solid-liquid separation wherein the undissolved mineral and phosphate compound(s) are separated as solids that can be recovered or discarded, thereby obtaining a solution containing lithium hydrogen carbonate.
The invention is directed to a method and the relating apparatus for combustion of gaseous or liquid fuel in a combustion chamber with a hydraulic diameter D. Fuel as well as the primary oxidant are introduced via a burner lance into the combustion chamber, whereby fuel and primary oxidant have a certain mean velocity u1 at the entry from the burner lance into the combustion chamber, and whereby a secondary oxidant with a mean velocity of u2 is introduced via a downcomer into the combustion chamber. The burner lance is arranged in a position p such that position p has a distance |d1| defined as the smallest distance between p and the combustion chamber centerline a, that the distance |d1| from position p to the intersection point i of the downcomer centerline and the intersection area S of combustion chamber and downcomer is smaller than the distance |dc| from the intersection of the combustion chamber centerline and the shortest connection between p and the combustion chamber centerline a to the intersection point i of the downcomer centerline c and the intersection area S of combustion chamber and downcomer.
F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
F23D 99/00 - Subject matter not provided for in other groups of this subclass
79.
METHOD AND ARRANGEMENT FOR CONTROLLING A BURNER OF A SUSPENSION SMELTING FURNACE
Described is a method and an arrangement for controlling a burner (1) of a suspension smelting furnace (2). The burner (1) comprises a reaction gas feeding device (5), and a fine solids feeding device (6). The fine solids feeding device (6) being at an upstream end of the fine solids feeding device (6) pivotably supported in the reaction gas feeding device (5). The burner (1) comprising by at least one first mechanical actuator (12) configured to center the fine solids feeding device (6) in the annular reaction gas outlet opening (9). Said at least one first mechanical actuator (12) being in response to receiving the control signal configured to perform a centering action to center the fine solids channel in the annular reaction gas outlet opening (9).
An outer pulp lifter element (1) for a pulp lifter (2) for a rotating drum grinding mill (3) comprises a first wall (4) directed towards the discharge end of the grinding mill, and at least one vane (6) protruding from the inner surface (12) of the first wall (4) towards the inside of the drum grinding mill (3) and comprising a guiding surface (10) on the front side of the vane (6). The outer edge (11) of the guiding surface (10) is angled in relation to the inner surface (12) of the first wall (4) in such a manner, that the angle (Θ) between the inner surface (12) of the first wall (4) and the outer edge (11) of the guiding surface (10) is smaller than 90 degrees.
B02C 17/18 - Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls Details
The invention is directed to a process and its relating plant for roasting gold bearing sulfide concentrate. Concentrate particles with a carbon content of more than 0.5 wt-% are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1000 °C in a fluidized bed to form a calcine, and wherein at least parts of the calcine are withdrawn from the roaster together with a gas stream as a solid fraction. Concentrate particles with a diameter at least 50 % smaller than the average diameter of the concentrate particles are separated as small particles and/or particles from the gas-solid-fraction are separated in at least one step as small calcine particles. The small particles and/ or at least part of the small calcine particles are pelletized, whereby at least 80 % of the pellets feature a diameter of at least 80 % of the concentrate particles average diameter and that the pellets are fed into the roaster (Fig. 1 ).
The invention describes a process for roasting of metal concentrate. Concentrate particles are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1200°C in a fluidized bed to form a calcine. At least parts of the calcine are withdrawn from the roaster together with a gas stream as a solid fraction. Concentrate particles with a diameter at least 50% smaller than the average diameter of the concentrate particles are separated as small particles and/or that particles from the gas-solid-fraction are separated in at least one step as small calcine particles and/or that particles are gained in another hydrometallurgical step as other particles. The small particles and/or at least part of the small calcine particles and/or at least parts of the other particles are pelletized, whereby at least 80 % of the pellets feature a diameter of at least 80% of the concentrate particles average diameter. The pellets are fed into the roaster.
The present invention relates to a device for feeding a continuous conveyor (20) with granular material. It comprises a first and a second continuous conveyor (10, 20) as well as a roller grate (50). The first continuous conveyor (10) is designed for the transport of material as a material bed having a mean width. With respect to both continuous conveyors (10, 20) the roller grate (50) is arranged such that the material is applied from the first continuous conveyor (10) directly onto the roller grate (50) and from the roller grate (50) directly or indirectly onto the second continuous conveyor (20). Here, the deviation between the transport directions T1, T2 and R1 of both continuous conveyors (10, 20) and the roller grate (50) is less than 10°.
A method and an apparatus for treating titanium-containing slag is disclosed. The method comprises contacting a titanium-containing slag (2) with a first sulphuric acid leach solution (4) for dissolving impurities contained in the slag to obtain a first slurry. In the method, the first slurry (8) is subjected to a solid-liquid separation (10) to obtain a first sulphuric acid leach solution containing the dissolved impurities from a first titanium-containing leach residue (12).
An electrode slipping device (1) comprises an upper holder ring (2) and a lower holder ring (3) having one or more clamping assemblies including a clamping shoe (4) and a clamping device(5). The clamping shoe (4) is operable between a clamping position and a release position. The clamping device (5) comprises a frame element (6) fixedly attachable to a holder ring (2, 3) to be stationary in relation to the holder ring, a cylinder portion (7), a plunger (8) and a pressing spring (11) arranged inside the cylindrical housing (9) of the plunger (8) for urging the plunger (8) to- wards the clamping shoe (4) and for pressing the clamping shoe (4) against the electrode (E). A tension bar (12) is releasably attached to the end plate (10) of the plunger (8). A piston element 15) is arranged movable inside the cylinder portion (7) to form a hydraulic power means (16). The clamping device (5) com- prises one and single tension bar (12) arranged centrally in relation to the frame element (6), the plunger (8), the pressing spring (11) and the piston element (15).
Described is method for sealing a vertical pressure filter (1), a vertical pressure filter (1) and an elongated sealing member for use in the method and in the vertical pressure filter (1). An elongated sealing member (10) that is used in the method and in the vertical pressure filter (1) comprising a first ridge potion (14) and at least one second ridge portion (18) that extends side by side with the first ridge portion (14).
B01D 25/127 - Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
B01D 29/09 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with filtering bands, e.g. movable between filtering operations
F16J 15/02 - Sealings between relatively-stationary surfaces
87.
METHOD FOR MOUNTING AN ELONGATE SEALING, CUTTER GUIDE, COMBINATION, AND A VERTICAL PRESSURE FILTER
Described is a method for mounting an elongate sealing strip (10) in a circumferential groove (11) in a lower surface (4) of a filter plate (3) of a vertical pressure filter (1). The method comprises placing the elongate sealing strip (10) in the circumferential groove (11) so that the opposite end portions of the elongate sealing strip (10) overlap, cutting an upper end portion (14) of the elongate sealing strip (10) so that the end portions of the elongate sealing strip (10) form a shortened overlapping section (16) forcing the opposite end portions into the circumferential groove (11) so that the end surfaces (12) of the elongate sealing strip (10) abut. Described is also a cutter guide for use in the method, a combination of a cutter and a cutter guide for use in the method, and a vertical pressure filter.
B01D 25/127 - Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
B01D 29/09 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with filtering bands, e.g. movable between filtering operations
F16J 15/02 - Sealings between relatively-stationary surfaces
B26B 29/06 - Arrangements for guiding hand cutting tools
The disclosure relates to a flotation arrangement for treating mineral ore particles suspended in slurry (11). The arrangement comprises a primary line (10) comprising at least two primary flotation cells (110a, 110b), a first secundary line (21), and a second secondary line (22) downstream (60) of the first secondary line. In the arrangement, underflow from a secondary line (42a) is arranged to flow to the last of the at least one primary flotation cells (110a) from which the primary overflow (51a) was received. The disclosure further relates a use of a flotation arrangement, to a flotation plant and to a flotation method.
A flotation arrangement for treating mineral ore particles suspended in slurry is presented. The arrangement comprises a primary flotation line (10) with a rougher part (11) and a scavenger part (12). Overflow of at least one rougher primary flotation cell (111a) is arranged to flow directly into a rougher cleaner cell (210a). Underflow (42a) from a first cleaner flotation cell is arranged to be combined into overflow (51b) from a rougher primary flotation cell downstream (111b) from the rougher primary flotation cell from which the first rougher cleaner flotation cell (210a) is arranged to receive primary overflow (51a); or into combined overflows (51b, 51c, 51d, 51e) from rougher primary flotation cells (111c, 111d, 111e) downstream from the rougher primary flotation cell from which the first rougher cleaner flotation cell is arranged to receive primary overflow; or into overflow (42b) from an additional rougher cleaner cell (210b) arranged to receive primary overflow from at least one rougher primary flotation cell downstream from the rougher primary flotation cell from which the first rougher cleaner flotation cell is arranged to receive primary overflow.
A flotation arrangement for treating mineral ore particles suspended in slurry is presented. The arrangement comprises a primary flotation line (10) with a rougher part (11) comprising at least two rougher primary flotation cells (111a, 111b) and a scavenger part (12) comprising at least two scavenger primary flotation cells (112a, 112b), and a secondary flotation line (20) comprising at least two secondary flotation cells (210a, 210b). A first secondary flotation cell (210a) is arranged to receive primary overflow (51 a) from at least one rougher primary flotation cell (111a), and a further secondary flotation cell (210b) to receive primary overflow (51 b) from at the least one further rougher primary flotation cell (111b). The further secondary flotation cell (210b) is arranged in fluid communication with a previous secondary flotation cell (210a), and underflow (42a) from a first secondary flotation cell (210a) is arranged to flow into the further secondary flotation cell (210b), or arranged to be combined with secondary underflow (42b) of the further secondary flotation cell.
This disclosure relates to an arrangement and a method for controlling a dewatering process comprising measuring values representing operating parameters of the gravitational sedimentation device and using the values as input values for a predictive multivariable model for predicting an operating state of the gravitational sedimentation device. The disclosure further relates to obtaining reference values for the operating parameters, determining at least one predicted output for an operating parameter of the gravitational sedimentation device, and comparing the predicted output to at the reference values to determine control values that will affect changes in operation of the gravitational sedimentation device.
B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
B01D 21/32 - Density control of clear liquid or sediment, e.g. optical control
B01D 21/34 - Controlling the feed distributionControlling the liquid level
G01N 1/20 - Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
A transmission assembly (1) for a slurry mixer with fluid addition via a mixer shaft (5), comprising a gear transmission device (2) having an input shaft (3) for receiving input rotation and an output shaft (4). Said assembly also comprises a slurry mixer shaft (5) fixed to the output shaft (4), extending towards a slurry mixer direction, the slurry mixer shaft (5) having an axial inner passage (5a) extending there through for conducting a fluid flow. The output shaft (4)) is a hollow tubular shaft arranged to nest a portion (5c) of the slurry mixer shaft (5), wherein the slurry mixer shaft (5) comprises, on a portion (5b) not nested by the output shaft (4), in the slurry mixer direction, a discontinuity (5b') on the mechanical structure thereof, arranged to exhibit a local maximum on internal stresses. A flotation cell (8) having such an assembly (1) is also concerned
A stirred bead grinding mill (1) comprises a substantially cylindrical grinding shell (2, 18) and a central stirring shaft (10) within the grinding shell. The central stirring shaft is provided with axially spaced stirring elements, preferably grinding discs (12), along the central stirring shaft. A replaceable grinding element (80) is provided that comprises an axial support structure (81) arranged to form the outer periphery of the grinding element adapted to fit within the grinding shell, and at least one counter disc (14) arranged to project radially inward from the axial support structure (81) to an extent separating two grinding zones in an axial direction while allowing the central stirring shaft within the grinding shell, wherein at least part of the counter disc (14) and/or the support structure (81) is provided with castellations (25A, 25B).
The present invention relates to a device for thermal treatment of bulk material, comprising a travelling grate chain being capable of revolving in direction of movement consisting of an endless travelling grate (1) with moveable links and a plurality of grate carriages (3). The grate carriages (3) each consist of a frame (30) with end pieces (33) on which carrying wheels (31) are mounted and grate rods (35) being arranged on crossbars (32). Furthermore, the device comprises wind boxes (41, 43) which are arranged such that from at least one wind box (41, 43) gas flows through the grate carriages (3) and their grate rods (35) from or into the wind boxes. At least one profile (50, 51) being pre-stressed during operation is provided which is arranged such that a component (50) during normal operation in at least one position of the travelling grate (1) is in contact with two crossbars (32).
A method and an arrangement measures electrode paste in an electrode column of an electric arc furnace. The electrode column has a steel casing, is provided with a contact shoe ring, and is filled with electrode paste introduced from above and evolving from raw paste in the upper part of the steel casing to melted paste and to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a laser beam transmitted by a first laser device. The level of the molten paste is determined with a laser beam transmitted by a second laser device. The data received from the laser devices is used for calculation of the distances of the levels of the raw paste and molten paste from the contact shoe ring.
Described is a method for producing nickel containing indurated chromite pellets. The method comprises providing a ground mixture containing iron and chromium containing material and optionally carbon and optionally additives;providing nickel bearing material comprising precipitated nickel compounds from a process for hydrometallurgical refining of nickel bearing raw material, binding agent, and optionally fluxing agent;mixing nickel bearing material, binding agent and optionally fluxing agent into the ground mixture to produce an agglomerating mixture;agglomerating the agglomerating mixture to produce green pellets;and indurating the green pellets to produce indurated chromite pellets. The method comprises heat-treating the nickel bearing material prior mixing the nickel bearing material into the ground mixture to remove sulfur, water, possible carbonates and volatiles from the nickel bearing material and to produce nickel oxides in the nickel bearing material.
The disclosure relates to a distributor valve body (1) for a vacuum filter, said distributor valve body comprising a valve chamber (2) for receiving a distribution end (11) of a filter shaft (10). The valve chamber (2) has a base surface (3), when in use, arranged to cooperate with a face surface (12) on a distributor end (11) of said filter shaft (10), so as to form a sealing interface therewith, and a circumferential rim surface (4), when in use, concentric with said filter shaft (10), for cooperating with a circumference (13) of the distributor end (11) of a filter shaft (10), so as to form a circumferential interface therewith. The circumferential rim surface (4) extends from the base surface (3), when in use, towards the distributor end (11) of a filter shaft (10) so as to at least partially cover said distribution end (11). The disclosure also concerns a combination for a distributor valve, and methods for replacing and modernizing a distributor valve.
B01D 33/21 - Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
F16K 11/02 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit
98.
SPARGER DEVICE FOR SPARGING A FLUID INTO A SLURRY TANK, FLOTATION APPARATUS AND SYSTEM HAVING SUCH SPARGER DEVICE, AND METHOD FOR SETTING CONTROL FLUID PRESSURE OF A SPARGER DEVICE
A sparger device (1) for sparging fluid into a slurry tank (10), said sparger device (1) comprising a hollow elongated body (2) having a nozzle opening (2a) for sparging a sparging fluid flow to a slurry tank (10). The device further comprises a needle (3) for opening and closing the nozzle opening (2a), and a control device (4) being arranged to actuate the needle (3). The control device (4) comprises a control chamber (5) partitioned into a first portion (5a) and second portion (5b) such that a pressure differential between the first portion (5a) and the second portion (5b) closes or opens the nozzle opening (2a). The second portion (5b) may be provided with a control fluid pressure preventing slurry backflow from the slurry tank (10). A flotation apparatus comprising a sparger device and a flotation system comprising a flotation apparatus are also discussed.
Described is a method and an arrangement for suspending a curtain (1) inside a cylindrical cooling space (2) of a cooling tower (3). The cylindrical cooling space (2) has a vertical cylindrical wall having an open upper end (5) at an upper end of the vertical cylindrical wall (4) and a closed bottom (6) at a lower end of the vertical cylindrical wall (4). The arrangement comprises lifting means (16) configured to vertically move the upper fastening means (15) inside the cylindrical cooling space (2) between a suspending position at the open upper end (5) of the cylindrical cooling space (2) and a mounting position between the open upper end (5) and the closed bottom (6) of the cylindrical cooling space (2).
F28C 1/00 - Direct-contact trickle coolers, e.g. cooling towers
F28C 1/02 - Direct-contact trickle coolers, e.g. cooling towers with counter-current only
F28F 19/01 - Preventing the formation of deposits or corrosion, e.g. by using filters by using means for separating solid materials from heat-exchange fluids, e.g. filters
100.
PROCESS AND PLANT FOR THERMAL TREATMENT IN A FLUIDIZED BED REACTOR
The invention describes a process for calcining a mineral comprising the following steps feeding a mineral into a fluidized bed reactor (i), injecting biogas as fuel into the fluidized bed reactor (ii), burning the biogas for generating heat to calcine the mineral (iii), withdrawing calcined mineral from the fluidized bed in the reactor (iv) and withdrawing a mixture of gas and solid particles from a position above the fluidized bed (v).
B01J 8/18 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles
B01J 8/24 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique
