A direct reduction plant for a direct reduction of iron oxides provided with a gas circulation circuit comprising: - a reactor (1) having a reduction area (2) adapted to be charged with said iron oxides; - an external source (20) of make-up gas; - a recovery and treatment line (10), arranged downstream of the reactor (1), to recover and treat the exhaust gas that comes out of the reactor (1); - a treatment and feeding line (11), arranged upstream of the reactor (1), to treat a process gas, obtained by mixing the make-up gas with the exhaust gas treated in the recovery and treatment line (10), and to feed the reduction area (2) of the reactor (1) with said process gas; wherein the recovery and treatment line (10) communicates downstream with said treatment and feeding line (11); wherein, in its end stretch, proximal to said treatment and feeding line (11), the recovery and treatment line (10) comprises a carbon dioxide removal device (50) to remove carbon dioxide from the exhaust gas, arranged upstream of a compressor (42) to compress the exhaust gas towards said treatment and feeding line (11).
C21B 13/00 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs
B01D 53/04 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
2.
CONTAINER, DEVICE AND METHOD FOR STORING OR PROCESSING PARTICULATE MATERIALS TO MINIMIZE OR ELIMINATE VIBRATIONS SUCH AS QUAKING OR SHAKING
A container with lower vibrations, such as quaking and shaking as well as noise effects, known also as hooting, honking or howling, and an effective and cost-competitive method and device to decrease such phenomena during the discharge of granular material particles from silos, hoppers, bins, reactors and in general containers for storing or processing such granular material particles. The container includes at least one baffle that is attached to the container wall, in the lower portion or at the bottom of the tapered discharge part of said container, protruding towards the central axis of its tapered discharge part. The baffle forms a stagnant zone in the bed of the granular material particles in contact with the container wall whereby the particles in that zone flow under the friction against other particles instead of the friction between the particles and the wall.
A plant for the production of briquettes of direct reduced iron (DRI) comprising: - a feeding line of direct reduced iron (DRI); - at least one briquetting machine (4, 4') for compacting the direct reduced iron (DRI) into briquettes, arranged downstream of said feeding line (1); wherein a carbon dosing device (5, 13), upstream of said at least one briquetting machine (4, 4'), is provided to add carbon into the direct reduced iron (DRI), whereby the carbon is compacted together with the direct reduced iron (DRI) in said at least one briquetting machine (4, 4'); wherein at least one heating device is provided, arranged upstream of said at least one briquetting machine (4, 4'), to heat the carbon; and wherein at least one recovery system (19) is provided, arranged upstream of said at least one briquetting machine (4, 4') to recover volatile substances which may be released from the carbon during heating by means of said at least one heating device.
C21B 13/00 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs
B01J 2/22 - Procédés ou dispositifs pour la granulation de substances, en généralTraitement de matériaux particulaires leur permettant de s'écouler librement, en général, p. ex. en les rendant hydrophobes par pressage dans des moules ou entre des cylindres
B30B 11/00 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes
B30B 11/16 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes utilisant des rouleaux, p. ex. utilisant deux rouleaux alvéolés associés
A direct reduction plant (10) for a direct reduction of iron oxides to produce a DRI product, comprising a reactor (11), configured to being loaded with said iron oxides, a reduction circuit (19) fluidically connected to said reactor (11), a hydrogen generator (31) able to generate a make-up gas comprising hydrogen gas and configured to receive hydrocarbons as a feed and generate, in absence of oxidant agents, said make-up gas and a product comprising carbon in solid phase. The product comprising carbon is used, inside an electric arc furnace as required for the desired steel production or is mixed with the DRI product to produce HBI products or CBI products with a controlled quantity of carbon.
The present invention provides a reduction system and method that can be operated with any proportion of gaseous hydrogen-containing gases and gaseous hydrocarbon-containing gases having the possibility of continuing its operation, ensuring an high process availability and negligible loss of production, when the gaseous hydrogen-containing gas for any reason is not available and allow the substitution of the gaseous hydrogen-containing gas with a gaseous hydrocarbon-containing gas with minor adjustments in the plant operation. The reduction system of the invention is designed to be implemented in new and already built direct reduction plants to operate efficiently and has lower capital and operation costs.
A method for producing direct reduced iron is provided. The method includes circulating a first stream of spent reducing gas exiting a reactor in a reducing gas circuit through at least one carbon dioxide removal unit and a reducing gas heater and the reactor. The method also includes mixing the first stream with reducing gas containing heavier hydrocarbons than methane.
The present invention provides a reduction system and method that can be operated with any proportion of gaseous hydrogen-containing gases and gaseous hydrocarbon-containing gases having the possibility of continuing its operation, ensuring an high process availability and negligible loss of production, when the gaseous hydrogen-containing gas for any reason is not available and allow the substitution of the gaseous hydrogen-containing gas with a gaseous hydrocarbon-containing gas with minor adjustments in the plant operation. The reduction system of the invention is designed to be implemented in new and already built direct reduction plants to operate efficiently and has lower capital and operation costs.
A vessel for containing direct reduced iron (DRI), such as a reactor for the production of DRI, a bin or a hopper or other container for storing or feeding DRI to melting furnaces or briquetting machines, includes at least an upper zone, defined by a first lateral wall having a substantially cylindrical tubular shape, and a discharge zone, positioned below the upper zone and defined by a second lateral wall having a substantially truncated cone shape converging toward a lower discharge aperture. The second lateral wall has an internal surface at least partly lined by an internal lining.
Method for producing DRI that comprises circulating a first stream (F1) of spent reducing gas exiting a reactor (10) in a reducing gas circuit (20) through at least one carbon dioxide removal unit (38) and a reducing gas heater (42) and the reactor (10), and mix the first stream (F1) with reducing gas containing heavier hydrocarbons than methane.
A method and apparatus for producing direct reduced iron using a pre-treated make-up gas as a reducing agent in a direct reduced iron reactor are provided. The method involves pre-treating a stream of make-up gas containing heavy hydrocarbons by subjecting the stream to low temperature adiabatic reforming at a temperature between 300° C. and 600° C., prior to using the stream of make-up gas as a reducing agent for producing direct reduced iron. The method also involves adjusting the humidity content of the stream of make-up gas after the low temperature adiabatic reforming by bypassing the stream to selectively split it into a first part of the stream of make-up gas and a second part of the stream of make-up gas, subjecting the first part to water separation, and then mixing the first part with the second part to obtain a reducing stream to be sent to direct reduced iron production.
A container with lower vibrations, such as quaking and shaking as well as noise effects, known also as hooting, honking or howling, and an effective and cost-competitive method and device to decrease such phenomena during the discharge of granular material particles from silos, hoppers, bins, reactors and in general containers for storing or processing such granular material particles. The container includes at least one baffle that is attached to the container wall, in the lower portion or at the bottom of the tapered discharge part of said container, protruding towards the central axis of its tapered discharge part. The baffle forms a stagnant zone in the bed of the granular material particles in contact with the container wall whereby the particles in that zone flow under the friction against other particles instead of the friction between the particles and the wall.
A direct reduction system for a direct reduction of iron ore, comprising a reactor (1) having a reduction area (2) and being adapted to be loaded from above with said iron ore; a treatment and feeding line (11), to process the process gases, thus obtaining a reducing gas mixture, and feed said reducing gas mixture into the reduction area (2); a line (10) for recovering and treating an exhausted gas exiting the reactor (1), communicating upstream with the reactor (1) and downstream with said treatment and feeding line (11); wherein at least one bypass duct (30) is provided, adapted to divert at least one portion of reducing gas mixture from said treatment and feeding line (11) to said recovery and treatment line (10).
A vessel (10) for containing direct reduced iron (DRI), such as a reactor for the production of DRI, a bin or a hopper or other container for storing or feeding DRI to melting furnaces or briquetting machines, comprises at least an upper zone (11), defined by a first lateral wall (13) having a substantially cylindrical tubular shape, and a discharge zone (12), positioned below the upper zone (11) and defined by a second lateral wall (16) having a substantially truncated cone shape converging toward a lower discharge aperture (15). The second lateral wall (16) has an internal surface at least partly lined by an internal lining (22).
The invention provides containers with lower vibrations, such as quaking and shaking as well as noise effects, known also as hooting, honking or howling, and an effective and cost-competitive method and device to decrease such phenomena during the discharge of granular material particles from silos, hoppers, bins, reactors and in general containers for storing or processing such granular material particles. The invention comprises at least one baffle that is attached to the container wall, in the lower portion or at the bottom of the tapered discharge part of said container, protruding towards the central axis of its tapered discharge part. The baffle forms a stagnant zone in the bed of the granular material particles in contact with the container wall whereby the particles in that zone flow under the friction against other particles instead of the friction between the particles and the wall.
A method and apparatus for producing direct reduced iron, said method comprising producing direct reduced iron using a pre-treated make-up gas as a reducing agent in a direct reduced iron reactor (10), and wherein producing direct reduced iron is carried-out using a zero-reformer process in which catalytic reformation of the pre-treated make-up gas is carried-out "in situ" within the direct reduced iron reactor (10) such that the pre-treated make-up gas is subjected to no further catalytic reaction besides the catalytic reactions that occur inside said direct reduced iron reactor (10),characterized in thatsaid method comprises: - pre-treating a stream of said make-up gas containing heavy hydrocarbons by subjecting the stream of make-up gas to a low temperature adiabatic reforming at a temperature comprised between 300°C and 600°C, prior to using said stream of make-up gas as a reducing agent for producing direct reduced iron; - subjecting said pre-treated stream of make-up gas to adjusting humidity content of said stream of make-up gas after said low temperature adiabatic reforming by bypassing said stream of make-up gas to selectively split said stream into a first part (128) of said stream of make-up gas and a second part (130) of said stream of make-up gas and subjecting said first part (128) to a water separation and then mixing said first part (128) to said second part (130) to obtain a reducing stream (146) to be sent to direct reduced iron production.
A process for producing high-carbon DRI utilizing a syngas comprising hydrogen, carbon monoxide, carbon dioxide and a low content of methane, derived from the gasification of hydrocarbons, such as coal, in a reduction reactor comprising a reduction zone, a lower discharge zone and a transition zone between said reduction zone and said lower discharge zone, wherein a portion of the syngas comprising H2, CO and CO2 is treated in a methane-forming reactor to convert H2, CO and CO2 to CH4, whereby a carburizing gas stream containing more than about 20% of CH4 is produced. The carburizing gas is then introduced to the transition zone and/or to the lower discharge zone of said reactor to increase the carbon content in the DRI, mainly in the form of Fe3C. DRI with carbon content from 2% to 4.5 % may be produced by regulating the composition and flow rate of the carburizing gas.
A process for producing DRI with improved efficiency in a direct reduction plant comprising a reduction reactor, a heat exchanger, a gas humidifier, and a CO2 removal unit, wherein a coal-derived gas having a high content of CO is subject to CO conversion with H2O to H2 and CO2 resulting after passing through the CO2 removal unit in a reducing gas with an adequate composition for its use in the reduction reactor. A liquid water circuit is established to heat water in said heat exchanger using the heat content of the hot gas stream withdrawn from the reduction reactor and to evaporate hot water in the humidifier, for saturating at least a portion of the coal-derived gas stream with H2O by contact with said heated liquid water stream, thereby supplying all the H2O necessary for the CO-conversion reaction without needing additional steam injection.
Containing apparatus comprising a container (11) of material (12), and a discharge device (10) provided with at least a movement member (14) having a rotary shaft (15) inserted in said container (11) in through manner, and a plurality of blades (27) mounted radially on said rotary shaft (15) and defining corresponding containing cells (30) having the function of temporarily containing said material (12) in order to move it, due to the effect of the rotation of said rotary shaft (15) from a zone of said internal cavity (17a), disposed above said rotary shaft (15), toward a discharge aperture (24) of said container (11) disposed below said rotary shaft (15), wherein the rotary shaft (15) comprises at least two adjacent axial zones (A, B, C, D, E, F, G) along said axis of rotation (Y), and wherein in each of said axial zones (A, B, C, D, E, F, G) there is a plurality of said blades (27) that defines a corresponding wheel (26) with blades.
Containing unit of material (12) used in iron and steel process comprising a container (11) having at least one lateral wall (17) that defines an internal cavity (17a) and provided with a plurality of through lateral apertures (16); a discharge device (10) installed at least partly in said container (111) to divide said internal cavity (17a) into a first zone (13) disposed above said discharge device (10), and a discharge zone (31) disposed below said discharge device (10) and through which said material (12) is discharged, in a controlled manner, by said discharge device (10).
2-lean recycle reducing gas second effluent. The first and second effluents are fed to the reducing zone of the reduction reactor as the reducing gas reactant. The flow rate of at least the second of the two make-up gases is regulated to control the carbon content of the DRI produced.
A sealing device for a vessel to achieve a fluid-tight seal in an aperture made in the lateral wall of said vessel, into which aperture a shaft is inserted. The sealing device comprises first sealing means disposed in contact with the shaft in the zone of said aperture, and second sealing means, comprising a containing body and a flexible connection element. The first sealing means comprise a plurality of sealing rings, disposed coaxial to the shaft and in contact with the latter, and a containing tube to contain the sealing rings. The lateral wall of the vessel comprises an interface flange. A closing flange is connected to the interface flange and to a flanged end of the containing body by means of attachment means and is positioned in contact with the containing tube and with the flexible connection element to keep the first sealing means in a determinate axial position with respect to the shaft.
F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties
F16J 15/18 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques
B63B 9/00 - Méthodes de tracé, de construction, d'entretien, de conversion, de radoubage, de réparation ou de détermination des caractéristiques des navires, non prévues ailleurs
F27D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
22.
Method and apparatus for production of direct reduced iron (DRI) utilizing coke oven gas
Direct reduction process and plant for producing DRI comprising a reduction reactor and at least one reducing gas heater typically comprising a convective heating section and a radiant heating section for raising the reducing gas temperature to a level adequate for iron oxides reduction to metallic iron, typically above 850° C., wherein the reducing gas fed to the reduction reactor comprises a stream of reducing gas recycled from the reduction reactor and a make-up stream of coke oven gas containing carbon compounds which may form carbon deposits in the heating path of said heater, namely BTX and other complex carbon compounds. The heater is provided with means for feeding oxidizing agents, for example steam, steam and air and/or oxygen at predetermined heating tubes successively for eliminating the carbon deposits which may form inside the heating tubes of said heater without interrupting the operation of the plant. The make-up stream of cold COG can be combined with the recycled gas at a point in the gas heating path of the heater where the tubes have a skin wall temperature of at least 700° C., or when the mixture of recycled gas and COG is at a temperature above 700° C. for minimizing clogging or fouling of heating equipment.
2 for increasing its reduction potential and is heated to a temperature above 850° C. before being recycled thus defining a first gas flow path used during normal operation of the blast furnace. Uniquely, a second gas flow path for continued circulation of top gas selectively through the heater and a cooler during operation interruptions of the blast furnace allows time for gradual controlled cool down of the heater in a manner to avoid heat-shock damage to the tubular heater.
2 is at least partially removed for regenerating its reducing potential, with or without undergoing previous cleaning, is used for producing DRI. One inventive embodiment comprises producing DRI at high temperature giving advantageously higher productivity and energy savings when using hot DRI in an electric arc furnace lowering the capital and operational costs of steelmaking.
A direct reduction process producing DRI from iron oxide particles by reduction at a about 750 °C with a reducing gas mainly H2 and CO, that also includes CO2, H20, and methane, a the reduction reactor and the top gas effluent from the reduction reaction after cooling/scrubbing is split. The resulting first top gas portion with a first hydrocarbon-containing make-up gas passes through a catalytic reformer yielding an improved hot reducing gas first effluent. The second top gas portion passes through a CO2 removal unit and then with the second hydrocarbon-containing make-up gas passes through a heater yielding a hot CO2-lean recycle reducing gas second effluent. The first and second effluents are fed to the reducing zone of the reduction reactor as the reducing gas reactant. The flow rate of at least the second of the two make-up gases is regulated to control the carbon content of the DRI produced.
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Technical and commercial consultancy for others related to
any kind of energy, oil, gas, petrochemical, metallurgical,
iron and steel industries; business organization and
direction services; profitability studies; project and
feasibility studies and business planning; business
management in relation to hospital and medical services;
business management and consultancy for others related to
organization and management of medical and hospital
structures, sanatoriums, convalescent homes, retirement
homes, nursing homes, thermal institutes; promotion of
sanitary services provided by others; promotion and
marketing (sales services) for others of pharmaceuticals,
hygienic and cosmetics products; business management and
organization of sanitary structures; suppliers selection
services; supplying industrial plants services for others;
commercial consultancy services. Construction, installation, assembly, repair and maintenance
services related to any kind of energy, oil, gas,
petrochemical, metallurgical, iron and steel industries;
direction and supervision of building construction; starting
up of power plants; technical assistance for power plants;
building construction services. Treatment of materials related to iron and steel, and
petrochemical, metallurgical and iron and steel industry
products. Technical project services namely, projects and feasibility
studies related to any kind of energy, oil and gas and
petrochemical industries; projects and feasibility studies
related to designs and hardware; engineering services,
namely, development engineering and project engineering;
design services; laboratory tests and tests of materials;
scientific research in the fields of medicine, bacteriology,
biology, chemistry, pharmaceutical chemistry, creating and
updating of software and reconstitution of databases.
27.
SEALING DEVICE, IN PARTICULAR FOR A SHAFT INSERTED TRANSVERSELY IN A VESSEL OF FLUIDS UNDER PRESSURE OR GRANULAR MATERIAL IN MOVEMENT
A sealing device for a vessel (12) to achieve a fluid-tight seal in an aperture (14) made in the lateral wall (18) of said vessel (12), into which aperture (14) a shaft (11) is inserted. The sealing device comprises first sealing means (24) disposed in contact with the shaft (11) in the zone of said aperture (14), and second sealing means, comprising a containing body (22) and a flexible connection element (43). The first sealing means (24) comprise a plurality of sealing rings (25), disposed coaxial to the shaft (11) and in contact with the latter, and a containing tube (32) to contain the sealing rings (25). The lateral wall (18) of the vessel (12) comprises an interface flange (17). A closing flange (37) is connected to the interface flange (17) and to a flanged end (23) of the containing body (22) by means of attachment means (47, 48) and is positioned in contact with the containing tube (32) and with the flexible connection element (43) to keep the first sealing means (24) in a determinate axial position with respect to the shaft (11).
A blast furnace system is used wherein the coke rate is decreased by recycling upgraded top gas from the furnace back into its shaft section (which upgraded top gas is heated in a tubular heater prior to being recycled). The top gas, comprising CO, CO2 and H2, is withdrawn from the upper part of the blast furnace; cooled and cleaned of dust, water, and CO2 for increasing its reduction potential and is heated to a temperature above 850°C before being recycled thus defining a first gas flow path used during normal operation of the blast furnace. Uniquely, a second gas flow path for continued circulation of top gas selectively through the heater and a cooler during operation interruptions of the blast furnace allows time for gradual controlled cool down of the heater in a manner to avoid heat-shock damage to the tubular heater.
C10K 1/10 - Purification des gaz combustibles contenant de l'oxyde de carbone par lavage avec des liquidesRégénération des liqueurs de lavage avec des liquides aqueux
C21B 5/06 - Utilisation des gaz de sortie des hauts fourneaux
2). The invention provides a more efficient method and plant comprising a reactor in which particulate material of iron ore comes into contact with a high temperature reducing gas to produce DRI, with lower investment and operating costs, avoiding the need for a fired heater for the reducing gas fed into the reduction reactor. The reducing gas is heated to a temperature above 700° C. in two steps, a first step at a temperature below about 400° C. to prevent the phenomenon of metal dusting, by exchange of sensible heat supplied by the stream of hot spent gas removed from the reduction reactor; and a second step by means of partial or total combustion with oxygen, maintaining the temperature of the combustion gas below the limits established by the construction materials of the combustion chamber.
C21B 13/02 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours à cuve
C21B 13/00 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
A blast furnace where coke Is combusted with oxygen, Instead of air, and where a top gas comprising CO, CO2, H2, and without excess nitrogen is withdrawn from the upper part of the blast furnace, cleaned of dust, the H2/CO volume ratio adjusted to between 1.5 to 4.0 in a water shift reactor, water and CO2 are removed (increasing its reduction potential), heated to a temperature above 850°C, and fed back to the blast furnace above where iron starts melting (thereby Increasing the amount of metallic iron reaching the dead-man zone and decreasing the amount of coke used for reduction). Also carbon deposit problems caused by heating the CO-containing recycled gas are minimized by on-line cleaning of the heater tubes with steam without significantly affecting the reduction potential of the recycled reducing gas.
C10K 3/04 - Modification de la composition chimique des gaz combustibles contenant l'oxyde de carbone en vue de produire un carburant amélioré, p. ex. un carburant de pouvoir calorifique différent qui peut ne pas contenir d'oxyde de carbone par traitement catalytique réduisant le taux d'oxyde de carbone
31.
METHOD AND APPARATUS FOR PRODUCTION OF DIRECT REDUCED IRON (DRI) UTILIZING COKE OVEN GAS
Direct reduction process and plant for producing DRI comprising a reduction reactor and at least one reducing gas heater typically comprising a convective heating section and a radiant heating section for raising the reducing gas temperature to a level adequate for iron oxides reduction to metallic iron, typically above 850°C, wherein the reducing gas fed to the reduction reactor comprises a stream of reducing gas recycled from the reduction reactor and a make-up stream of coke oven gas containing carbon compounds which may form carbon deposits in the heating path of said heater, namely BTX and other complex carbon compounds. The heater is provided with means for feeding oxidizing agents, for example steam, steam and air and/or oxygen at predetermined heating tubes successively for eliminating the carbon deposits which may form inside the heating tubes of said heater without interrupting the operation of the plant. The make-up stream of cold COG can be combined with the recycled gas at a point in the gas heating path of the heater where the tubes have a skin wall temperature of at least 700°C, or when the mixture of recycled gas and COG is at a temperature above 700°C for minimizing clogging or fouling of heating equipment.
C21B 13/00 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs
C21B 13/02 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours à cuve
C10K 1/00 - Purification des gaz combustibles contenant de l'oxyde de carbone
C01B 3/36 - Production d'hydrogène ou de mélanges gazeux contenant de l'hydrogène par réaction de composés organiques gazeux ou liquides avec des agents gazéifiants, p. ex. de l'eau, du gaz carbonique, de l'air par réaction d'hydrocarbures avec des agents gazéifiants avec l'oxygène ou des mélanges contenant de l'oxygène comme agents gazéifiants
C10B 43/10 - Enlèvement des incrustations par flambage
C10G 9/16 - Prévention ou enlèvement des incrustations
F27D 25/00 - Dispositifs pour enlever les incrustations
32.
PROCESS FOR PRODUCING DIRECT REDUCED IRON (DRI) WITH LESS CO2 EMISSIONS TO THE ATMOSPHERE
A process for producing direct reduced iron (DRI) with lower emissions of CO2 to the atmosphere, in a direct reduction system comprising a direct reduction reactor to which iron oxides are fed in the form of pellets, lumps or mixtures thereof, wherein said iron oxides are caused to react with a reducing gas mainly composed of hydrogen and carbon monoxide at high temperature, and wherein said reducing gas is derived from the reformation of a hydrocarbon-containing gas, and wherein a first portion of the reducing gas stream effluent from said reduction reactor, which contains H2, CO, CO2 and H2O in various proportions, and which is cooled and cleaned in a cooler and which is combined with a gas containing hydrocarbons and said mixture passes through a catalytic reformer before being fed at high temperature to said reduction reactor. CO2 is removed from a portion of the gas stream effluent from said reduction reactor and the resultant gas stream is used as fuel in the reformer thus decreasing the amount of CO2 emitted to the atmosphere. The gas stream containing less CO2 but still containing CO to be used as fuel may further be reacted with water in a "shifter" reactor for converting said CO and H2O to CO2 and H2. In this way more CO2 may be removed from the fuel gas stream and therefore, the resultant fuel gas is mainly composed of hydrogen, further decreasing the amount of CO2 emitted to the atmosphere.
A process for producing direct reduced iron (DRI) from iron ores and reducing the cost and energy requirements of steelmaking, utilizing a gas produced from fossil fuels, containing sulfur compounds and BTX, wherein said gas is heated in a gas heater, wherein heat is transferred from a previously-heated solid material to the gas. The hot gas is caused to flow through a bed of DRI particles, iron oxides or equivalent material, outside of the reduction reactor, where said material adsorbs sulfur compounds and destroying the BTX. The gas resulting from this treatment, free from sulfur compounds and BTX, is combined with a reducing gas stream withdrawn from the reduction reactor after H20 and C02 have at least partially been removed for regenerating its reducing potential with or without undergoing a previous cleaning treatment.
An integrated steelmaking plant for merging continuous operation of a reduction reactor producing hot DRI with the batch operation of a DRI melting furnace(s). The reactor produces hot DRI for a DRI melting furnace or cold DRI continuously even when the DRI production exceeds the DRI consumption rate of the furnace or suffers long-term operational delays. The reduction reactor has a DRI cooling zone therein which is selectively operable for cooling DRI when the hot DRI produced in the reactor can't all be consumed by the DRI melting furnace and when the capacity of the DRI bin feeding the melting furnace is insufficient to accumulate additional hot DRI. No separate DRI cooling vessel plus its gas compressor and gas cooling-cleaning system is needed, thus decreasing capital and operational costs. This also permits a flexible and modular construction and operation of a steelmaking plant with high or low pressure reduction reactors.
C21B 13/00 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs
F27D 17/00 - Dispositions pour l'utilisation de la chaleur perdueDispositions pour l'utilisation ou pour l'élimination des gaz résiduaires
C21B 13/02 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours à cuve
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
B01D 53/22 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par diffusion
The present invention concerns a method and an apparatus for producing DRI (Direct Reduced Iron) utilizing a high-oxidation reducing gas containing carbon monoxide and hydrogen, derived directly or indirectly from the gasification of hydrocarbons or coal, with a high content of oxidants (H20 and CO2). The invention provides a more efficient method and plant comprising a reactor in which particulate material of iron ore comes into contact with a high temperature reducing gas to produce DRI, with lower investment and operating costs, avoiding the need for a fired heater for the reducing gas fed into the reduction reactor. The reducing gas is heated to a temperature above 700°C in two steps, a first step at a temperature below about 400°C to prevent the phenomenon of metal dusting, by exchange of sensible heat supplied by the stream of hot spent gas removed from the reduction reactor; and a second step by means of partial or total combustion with oxygen, maintaining the temperature of the combustion gas below the limits established by the construction materials of the combustion chamber.
A steelmaking plant including a pressurized direct reduction reactor for continuous production of hot direct reduced iron with a batch-melting furnace and a standby cooler, all three being capable of being situated side-by-side, with such DRI being able to be alternatively fed to the furnace or to the cooler. The furnace is selectively charged through a diverter valve by a pneumatic transport system with the hot DRI being entrained in a carrier gas fed into a receiving bin (having an upper DRI/gas disengagement space and a lower DRI buffer portion). A pressurized charge of the DRI accumulated in such disengaging/buffer bin is periodically fed down into a dosing/depressurization bin which in turn depressurizes the DRI and feeds a batch of DRI down into the furnace. Upon sensing that the buffer portion is full, the DRI is then pneumatically diverted to the cooler, such as during furnace maintenance shut down.
A method and apparatus for producing direct reduced iron (DRI), also known as sponge iron, by means of direct contact of iron oxides with a stream of recycled and regenerated hot reducing gases containing hydrogen and carbon monoxide. The invention provides a way for decreasing the uncontained emission of CO2 to the atmosphere produced by combustion of carbon-bearing fuels in the reducing gas heater by substituting, at least partially, a gas stream mainly composed of hydrogen in lieu of the usual carbon-bearing fuels. The hydrogen fuel stream, depleted of CO2 by means of a physical gas separation unit (which can be a PSA/VPSA type adsorption unit, a gas separation membrane unit or combination of PSA/VPSA unit and a gas separation membrane unit) is derived from at least a portion of a stream of regenerated reducing gases being recycled to the reduction reactor. The derived hydrogen fuel stream is combusted in the reducing gas heater and/or other thermal equipment in the reduction plant, thus decreasing the CO2 emissions directly to the atmosphere.
C21B 13/02 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours à cuve
B01D 53/04 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes
B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
C10K 1/00 - Purification des gaz combustibles contenant de l'oxyde de carbone
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
market analysis for the steel and petroleum industries Construction services, namely, planning and custom construction of direct reduction plants, metallurgical plants, rolling plants, steel mills, hydrotreatment units, hydrode sulfurization units, alkylation units, isomerisation units, sulfur recovery units, delayed coker units, atmospheric distillation units and vacuum units, methanol plants and polyolefine plants for the iron, steel industry, petrochemical and petroleum industries Custom design and engineering of direct reduction plants, metallurgical plants, Rolling plants, steel mills, hydrotreatment units, hydride sulfurization units, alkylation units, isomerisation units, sulfur recovery units, delayed coker units, atmospheric distillation units and vacuum units, methanol plants, and polyolefine plants for the petrochemical, iron and steel works industries
40.
INTEGRATED STEEL PLANT WITH PRODUCTION OF HOT OR COLD DRI
DANIELI & C. OFFICCINE MECCANICHE, S.P.A. (Italie)
Inventeur(s)
Becerra-Novoa, Jorge, Octavio
Lopez-Gomez, Ronald, Victor Manuel
Martinis, Alessandro
Tavano, Andrea
Abrégé
An integrated steelmaking plant design is disclosed for efficiently merging the continuous operation of a reduction reactor producing hot DRI with the batch operation of at least one DRI melting furnace. The direct reduction reactor is adapted for producing hot DRI for its consumption in a DRI melting furnace or for producing cold DRI when the continuous production of DRI will exceed the DRI consumption rate of the melting furnace or when it suffers long-term operational delays. The reduction reactor has a DRI cooling zone within the same reactor vessel which is selectively operable for cooling the DRI in the same reactor vessel when the hot DRI produced in said reactor will not be consumed by the DRI melting furnace and when the capacity of the hot DRI bin feeding the melting furnace is insufficient to accumulate the amount of hot DRI which will not be consumed. The need of a DRI cooling vessel with its associated gas compressor and gas cooling and cleaning system is dispensed with therefore decreasing the capital and operational costs of said steelmaking plant. The invention also allows for a flexible and modular construction and operation of a steelmaking plant and is applicable to reduction reactors whether designed to operate at high or low pressure.
A steelmaking plant method and apparatus which includes a pressurized direct reduction reactor for continuous production of hot direct reduced iron (ORI); feeding such DRI to a batch melting furnace or to a standby cooler. The furnace is selectively charged through a diverter valve by a pneumatic transport system with the hot DRI being entrained in a motive carrier gas fed via a first conduit into a receiving bin. A pressurized charge of the DRI accumulated in such disengaging buffer bin is periodically fed via a second conduit down into low dosing/depressurization bin which in turn depressurizes the DRI and feeds a batch of DRI down into the furnace. Upon sensing the capacity of the buffer portion of the receiving bin being filled, the DRI! is then pneumatically diverted from the reactor to the cooler, such as during shut down of the furnace for maintenance or otherwise.
H01L 29/16 - Corps semi-conducteurs caractérisés par les matériaux dont ils sont constitués comprenant, mis à part les matériaux de dopage ou autres impuretés, seulement des éléments du groupe IV de la classification périodique, sous forme non combinée
42.
Method for the direct reduction of iron oxides to metallic iron utilizing coke oven gas or the like
A process for reducing iron ore particles in a moving bed reduction reactor comprising an upper reduction zone and a lower discharge zone, wherein coke oven gas, preferably forming all the make-up for the reducing gas circulating through and reacting in the reduction zone, is first fed to the discharge (and, optionally, cooling) zone and thereafter, conditioned by the DRI in the lower zone, is withdrawn from the reactor and transferred externally into the recycle reducing gas for injection into the reduction zone; with the heavy hydrocarbons and other components of coke oven gas which cause fouling, corrosion, or deposits in the direct reduction plant being removed from coke oven gas by catalytic and/or adsorptive action of the DRI in the lower zone; preferably the gas flow rate of the coke oven gas and the externally transferred gas differs between about 100 and 200 NCM per ton of DRI produced.
A method and apparatus for producing a metallized product (DRI) in a downstream direct reduction reactor utilizing the reducing gas effluent either from an upstream reduction reactor associated with a melter-gasifier or from the melter-gasifier itself (in the absence of such upstream reduction reactor), wherein said reducing gas is reacted with water in a shifter and then CO2 is removed from a combined stream of said shifted gas with recycled gas effluent from said downstream reactor in an adsorption CO2 removal unit. Separation of CO2 produces a lean gas stream and a CO2 laden gas stream. The CO2 lean gas stream is utilized for producing DRI in said downstream reduction reactor and the CO2 laden gas stream is used as fuel in a boiler for producing steam which serves then at least to react with carbon monoxide in said shifter to produce hydrogen and preferably also for power generation with resulting overall increased plant efficiency.
Apparatus for the combustion of gas exiting from an electric arc furnace where the heat of combustion is used for the preheating of scraps entering the furnace wherein the apparatus has an insertion device for introducing comburent substance into a preheating chamber or loading tunnel for scrap metal where the loding tunnel has an inlet section for scrap metal, a seal section to prevent an uncontrolled entrance of air in the tunnel, a heating section and an unloading section for delivering scrap metal to the furnace. The insertion device for the comburent substance has one or more adjustable openings placed in the loading tunnel, and said apparatus comprises a device or a series of devices.
A direct reduction plant for the production of a metallized product (DRI) by the reduction of iron ores in lump or pellet form, wherein the reducing gas utilized in the DRI reactor contains acid gases such as sulphur compounds and carbon dioxide. The make-up reducing gases are typically produced by partial oxidation of hydrocarbons (syngas) at a high pressure while the DRI reactor is usually operated at a lower pressure. The pressure level of the reducing gas effluent from the DRI reactor (top gas), after cooling and dewatering, is increased to the pressure level of the syngas and the resulting recycle reducing gas is then combined with the make-up syngas and treated in a single acid-gas absorption unit forming a combined stream of clean upgraded reducing gas which thereafter is expanded in a turbine for lowering combined reducing gas pressure to the pressure level of the DRI reactor and is then heated to a temperature preferably above 950°C and used in the DRI reactor for producing said DRI. The compressor for raising the pressure of the initially cool recycle gas uses energy from the expansion turbine (used for lowering the pressure of the high-pressure combined reducing gas).
A hooking device (1) for moving systems of rolling cylinders comprises a lifting structure (30-32) of a cylinder (50) provided with gripping means (4) of said cylinder (50) and upper hooking means (10) suitable for keeping said device (1) in a raised position, said device (1) also comprising tilt compensation means. According to the invention, said tilt compensation means comprise a series of guides (100, 120), each guide (100, 120) being provided with at least one mass element (200, 220), said at least one mass element (200, 220) being moveable along said guide (100, 120).
A direct reduction process for producing direct reduced iron (DRI) in a reduction reactor having a reduction zone for reducing iron-oxides-containing particles, such as iron ore pellets, to DRI by reaction of said iron oxides with a high temperature reducing gas, and a cooling zone for lowering the temperature of the DRI produced in said reduction zone, wherein a stream of cooling gas, usually natural gas, is circulated through said cooling zone, a portion of said cooling gas is withdrawn from the cooling zone, cooled and cleaned in a gas cooler and a portion of the cooled gas is recycled to said reduction zone by means of an ejector utilizing the high-pressure natural gas make-up feed as the ejector's motive fluid. Using an ejector for recycling the cooling gas instead of using a mechanical compressor provides significant savings in electricity and in capital, operational and maintenance costs. A direct reduction plant having a DRI cooling zone which uses at least one ejector in recycling at least a portion of cooling gas to the cooling zone.
A direct reduction process for producing direct reduced iron (DRI) in a reduction reactor having a reduction zone for reducing iron-oxides-containing particles, such as iron ore pellets, to DRI by reaction of said iron oxides with a high temperature reducing gas, and a cooling zone for lowering the temperature of the DRI produced in said reduction zone, wherein a stream of cooling gas, usually natural gas, is circulated through said cooling zone, a portion of said cooling gas is withdrawn from the cooling zone, cooled and cleaned in a gas cooler and a portion of the cooled gas is recycled to said reduction zone by means of an ejector utilizing the high-pressure natural gas make-up feed as the ejector's motive fluid. Using an ejector for recycling the cooling gas instead of using a mechanical compressor provides significant savings in electricity and in capital, operational and maintenance costs. A direct reduction plant having a DRI cooling zone which uses at least one ejector in recycling at least a portion of cooling gas to the cooling zone.
A process for reducing iron ore particles in a moving bed reduction reactor comprising an upper reduction zone and a lower discharge zone, wherein the coke oven gas, preferably forming all the make-up for the reducing gas circulating through and reacting in said reduction zone, is first fed to said discharge (cooling) zone and thereafter said coke oven gas, conditioned by the DRI in the lower zone, is withdrawn from the reactor and fed preferably into the recycled reducing gas for injection into the reduction zone of the reactor. Heavy hydrocarbons and other components of coke oven gas which may otherwise cause fouling, corrosion, or deposits in the direct reduction plant are removed from coke oven gas by catalytic and/or adsorptive action of the DRI present in said lower zone, before being externally transferred to the reduction zone of the reduction reactor.
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
35 - Publicité; Affaires commerciales
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Lines, installations and machinery for the iron and steel industry and metallurgical industry, for the manufacture of metal tapes, for the manufacture of rubber and plastics, for the recycling and recovery of valuable materials from scrap, slag, off-cuts and other materials recoverable from steel works, for roll shops in steel works, for the manufacture of fibres from rock and glass and for the manufacture of tempered glass in curved sheets, including continuous scrap loaders for EAFs, components for steel works including nozzles and rollers for high temperatures, machines for loading, unloading and transporting bulk materials from yards or ships, machines for handling loose materials at docks and in steel works, grinding and transporters of rolling cylinders, with exclusion of submersible pumps (parts of machines). Electronic systems for smoke analysis, control and automatic operation of steel works processes and lines;electronic systems for the control and management of fuel for iron and steel furnaces;electronic systems for the control, operation and management of heating processes;electronic systems for the control of pollutant emissions into the atmosphere;electronic systems for the control, operation and management of roll shops and grinding machines;electronic systems for the control, operation and management of loose materials at ports and steel works and of lines, installations and machinery for such handling;electronic systems for the control and management of steel works materials;electronic systems for the control and management of processes for the manufacture of rubber and plastics and production lines therefor;electronic systems for the control, operation and management of lines for the manufacture of operating rolled sections and machines and processes for their production;electronic systems for the control, operation and management of production lines for fibreglass and rock wool;electronic systems for the control, operation and management of production lines for sheets of tempered and curved glass;apparatus and instruments for transforming and distributing electricity and power with exclusion of connectors, fuses, electric relays, couplings (electric), electric couplings, electric cables, switchboxes (electricity), chips (integrated circuits), electrical conductors, connectors, connections (electric), switchboards, fibre-optical cables; anti-pollution devices, namely devices for analysing and controlling waste gases from high-temperature furnaces and incinerators. Industrial installations and components therefor for the iron and steel and metallurgical industry, namely furnaces for the production of molten metal, smelting furnaces and processing furnaces, preheaters for scrap, rotary hearth furnaces, electric arc furnaces, furnaces and equipment for heating, heat treating, calcinating, firing and directly reducing products and materials for the metallurgical industry, burners and burners for furnaces;industrial furnaces and ovens and parts therefo;equipment for reducing environmental impact, namely purifiers;equipment for the treatment of smoke and water;decarbonisation containers and parts therefor, namely iron and steel and metallurgical furnaces for controlling carbon in metal whether in solid or liquid state;tempering apparatus and parts therefor;installations for atmospheric gas and parts therefor, namely controlled atmosphere furnaces for use in the iron and steel and metallurgical industries. Technical and business consultancy. Construction, installation, repair and maintenance for the iron and steel and metallurgical industries. Treatment of materials in relation to iron and steel and metallurgical industry goods. Design, feasibility studies provided for the iron and steel and metallurgical industries.
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
35 - Publicité; Affaires commerciales
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Lines, installations and machinery for the iron and steel industry and metallurgical industry, for the manufacture of metal tapes, for the manufacture of rubber and plastics, for the recycling and recovery of valuable materials from scrap, slag, off-cuts and other materials recoverable from steel works, for roll shops in steel works, for the manufacture of fibres from rock and glass and for the manufacture of tempered glass in curved sheets, including continuous scrap loaders for EAFs, components for steel works including nozzles and rollers for high temperatures, machines for loading, unloading and transporting bulk materials from yards or ships, machines for handling loose materials at docks and in steel works, grinding and transporters of rolling cylinders, with exclusion of submersible pumps (parts of machines). Electronic systems for smoke analysis, control and automatic operation of steel works processes and lines;electronic systems for the control and management of fuel for iron and steel furnaces;electronic systems for the control, operation and management of heating processes; electronic systems for the control of pollutant emissions into the atmosphere; electronic systems for the control, operation and management of roll shops and grinding machines;electronic systems for the control, operation and management of loose materials at ports and steel works and of lines, installations and machinery for such handling; electronic systems for the control and management of steel works materials; electronic systems for the control and management of processes for the manufacture of rubber and plastics and production lines therefor; electronic systems for the control, operation and management of lines for the manufacture of operating rolled sections and machines and processes for their production; electronic systems for the control, operation and management of production lines for fibreglass and rock wool; electronic systems for the control, operation and management of production lines for sheets of tempered and curved glass; apparatus and instruments for transforming and distributing electricity and power with exclusion of fuses, electric relays, couplings, electric; couplings; electric couplings; electric cables; switchboxes (electricity); chips (integrated circuits); electrical conductors; connectors, connections (electric); switchboards; fibre-optical cables, photovoltaic cells, pumping; telemetry; chargers; transformars; accumulators; batteries; controllers; indicators; anti-pollution devices, namely devices for analysing and controlling waste gases from high-temperature furnaces and incinerators. Industrial installations and components therefor for the iron and steel and metallurgical industry, namely furnaces for the production of molten metal, smelting furnaces and processing furnaces, preheaters for scrap, rotary hearth furnaces, electric arc furnaces, furnaces and equipment for heating, heat treating, calcinating, firing and directly reducing products and materials for the metallurgical industry, burners and burners for furnaces;industrial furnaces and ovens and parts therefo;equipment for reducing environmental impact, namely purifiers;equipment for the treatment of smoke and water;decarbonisation containers and parts therefor, namely iron and steel and metallurgical furnaces for controlling carbon in metal whether in solid or liquid state;tempering apparatus and parts therefor;installations for atmospheric gas and parts therefor, namely controlled atmosphere furnaces for use in the iron and steel and metallurgical industries; with exclusion of solar collectors. Technical and business consultancy. Construction, installation, repair and maintenance for the iron and steel and metallurgical industries only in relation to lines, installations and machinery for the iron and steel industry and metallurgical industry, for the manufacture of metal tapes, for the manufacture of rubber and plastics, for the recycling and recovery of valuable materials from scrap, slag, off-cuts and other materials recoverable from steel works, for roll shops in steel works, for the manufacture of fibres from rock and glass and for the manufacture of tempered glass in curved sheets, including continuous scrap loaders for EAFs, components for steel works including nozzles and rollers for high temperatures, machines for loading, unloading and transporting bulk materials from yards or ships, machines for handling loose materials at docks and in steel works, grinding and transporters of rolling cylinders with exclusion of submersible pumps (parts of machines), electronic systems for smoke analysis, control and automatic operation of steel works processes and lines, electronic systems for the control and management of fuel for iron and steel furnaces, electronic systems for the control, operation and management of heating processes, electronic systems for the control of pollutant emissions into the atmosphere, electronic systems for the control, operation and management of roll shops and grinding machines, electronic systems for the control, operation and management of loose materials at ports and steel works and of lines, installations and machinery for such handling, electronic systems for the control and management of steel works materials, electronic systems for the control and management of steel works materials, electronic systems for the control and management of processes for the manufacture of rubber and plastics and production lines therefore, electronic systems for the control, operation and management of lines for the manufacture of operating rolled sections and machines and processes for their production, electronic systems for the control, operation and management of production lines for fibrerglass and rock wool, electronic systems for the control, operation and management of production lines for sheets of tempered and curved glass, apparatus and instruments for transforming and distributing electricity and power with exclusion of fuses, electric relays, couplings, electric, couplings, electric couplings, electric cables, switchboxes (electricity), chips (integrated circuits), electrical conductors, connectors, connections (electric), switchboards, fibre-optical cables, photovoltaic cells, pumping, telemetry, chargers, transformers, accumulators, batteries, controllers, indicators, scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking (supervision), life-saving and teaching apparatus and instruments, apparatus for recording, transmission or reproduction of sound or images, magnetic recording carriers, phonograph records, automatic distribution machines and mechanisms for pre payment apparatus, cash registers, calculating machines, equipment for data processing and computers, fire extinguishing apparatus, anti-pollution devices, namely devices for analysing and controlling waste gases from high-temperature furnaces and incinerators, industrial installations and components therefore for the iron and steel and metallurgical industry, namely furnaces for the production of molten metal, smelting furnaces and processing furnaces, preheaters for scrap, rotary hearth furnaces, electric arc furnaces, furnaces and equipment for heating, heat treating, calcinating, firing and directly reducing products and materials for the metallurgical industry, burners and burners for furnaces, industrial furnaces and ovens and parts therefore, equipment for reducing environmental impact, namely purifiers, equipment for the treatment of smoke and water, decarbonisation containers and parts therefore, namely iron and steel and metallurgical furnaces for controlling carbon in metal whether in solid or liquid state, tempering apparatus and parts therefore, installations for atmospheric gas and parts therefore, namely controlled atmosphere furnaces for use in the iron and steel and metallurgical industries, with exclusion of solar collectors. Treatment of materials in relation to iron and steel and metallurgical industry goods. Design, feasibility studies provided for the iron and steel and metallurgical industries.
Gas burner (1) comprising a main metal body (6), an inner lance (11) for combustible gas, at least two outer lances (10) for combustible gas, a single duct (8) for conveying pre-heated air, a regulation system for the combustible gas, a refractory unit (30), characterized in that said gas burner (1) comprises a series of nozzles (20) for the injection of the preheated air into the combustion chamber, and in that, by operating on the gas regulation system, it is possible to switch, with continuity, from a flame functioning mode of the burner to a flameless functioning mode, the latter characterized by low emissions of polluting agents.
F23C 6/02 - Appareils à combustion caractérisés par la combinaison d'au moins deux chambres de combustion disposées parallèlement
F23C 7/06 - Amenées d'air ne traversant pas le brûleur pour le réchauffage de l'air entrant
F23D 5/08 - Brûleurs dans lesquels le combustible liquide se vaporise dans l'enceinte de combustion, avec ou sans transformation chimique du combustible vaporisé à film liquide sur une ou plusieurs surfaces planes ou convexes sur des surfaces en cascade
F23D 5/00 - Brûleurs dans lesquels le combustible liquide se vaporise dans l'enceinte de combustion, avec ou sans transformation chimique du combustible vaporisé
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Lines, installations and machinery for the iron and steel industry, for the manufacture of metal strips, for the production of rubber and plastic, for the recycling and the recovery of valued materials from scraps, slags, disposals, and other items discharged from steelmaking processes, for roll shop lines, for the production of fibrous materials from glass and rocks, as well as for the production of tempered curved glass sheets; electric arc furnace continuous scrap loaders; components for the steelmaking industry, namely, lances and high temperature rolls; plants for loading, unloading and transporting materials in bulk from parks and ships; machines for movement on wharf and in steel plant of disjointed materials, grinders and rolls loaders; equipment, machinery and plants for thermal processes and their parts, namely, direct reduction plants, melt shops, roll grinders, automatic roll shops, glass and rock plants and bulk material handling systems.
(2) Electronic systems for the analysis of off-gasses in high temperature treatment plants, namely energy production plants and concrete and ceramic plants; electronic systems for the control and automatic conduction of steelmaking lines and processes; electronic systems for the control and conduction of materials for the feeding of siderurgical furnaces, namely, steelmaking furnaces; electronic systems for the control, conduction and management of heating processes during iron and steel processing; electronic systems for the control of greenhouse gas emissions during iron and steel processing and production; electronic systems for the control, conduction and management of roll shops and roll grinders in steel and iron processing and production plants; electronic systems for the control, conduction and management of bulk and loose materials handling on wharfs and in steel plants, as well as lines, installations and machinery for handling the same; electronic systems for the control and management of steel processing and production; electronic systems for the control and management for the production of rubber and plastic and related lines; electronic systems for the control, conduction and management of lines for the production of metal strips and machines and processes to obtain them; electronic systems for the control, conduction and management of lines to produce mineral wool and fibreglass; electronic systems for the control, conduction and management of lines for the production of tempered and curved glass sheets; apparatus and instruments for the transformation and distribution of electricity and energy.
(3) Components for the steelmaking industry, namely, burners; industrial equipment and their components for obtaining, treating and finishing metals, namely furnaces for the production of metal; smelting and treating furnaces, regenerators for scrap metal, rotary table ovens, electric arc furnaces; kilns and equipment for heating, heat treating, calcinating, firing and for the direct reduction of products and materials belonging to metallurgical industry and oven burners; industrial kilns and furnaces and their parts; apparatus for air cleaning, namely, depurators and devices for abatement of pollution emission in strip line and fiberglass and mineral wool plants; decarburizing vessels and their parts; hardening apparatus and their parts, namely, heat treatment furnaces for use in the metal processing industry; degassing equipment and their parts for use in liquid metal treatment and in glass and mineral wool plants; apparatus for filtering off-gasses and for water treatment for use in metal processing plants. (1) Construction, installation, repair and maintenance services of goods related to metallurgical, iron and steel industry.
(2) Treatment of materials related to goods of metallurgical and iron and steel industry for the purpose of obtaining rough, semi-finished and finished intermediate parts such as bars, tubes and strips, glass fibres and mineral wool compositions; technical and commercial consultancies services to support clients in up-grading existing equipment, lines and plants, optimize production cycles and improve performance in metal making, waste recovery, glass/rock fibre processes, energy/electricity and chemical production plants and the transportation of bulk materials.
(3) Feasibility studies for metallurgical and iron and steel industry.
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
06 - Métaux communs et minerais; objets en métal
07 - Machines et machines-outils
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
12 - Véhicules; appareils de locomotion par terre, par air ou par eau; parties de véhicules
19 - Matériaux de construction non métalliques
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Produits chimiques destinés à l'industrie, la science, la
photographie, l'agriculture, l'horticulture, la
sylviculture; engrais pour les terres (naturels et
artificiels); compositions extinctrices; trempes et
préparations chimiques pour la soudure; produits chimiques
destinés à conserver les aliments; matières tannantes;
substances adhésives destinées à l'industrie. Métaux communs bruts et mi-ouvrés et leurs alliages; ancres,
enclumes, cloches; matériaux à bâtir laminés et fondus;
rails et autres matériaux métalliques pour les voies
ferrées; chaînes (à l'exception des chaînes motrices pour
véhicules); câbles et fils métalliques non électriques;
serrurerie; tuyaux métalliques; coffres-forts et cassettes;
billes d'acier; fers à cheval; clous et vis; autres produits
en métal (non précieux) non compris dans d'autres classes;
minerais; installations de stockage (entrepôts) et quais de
chargement de trains dans les mines; ouvrages portuaires. Installations pour la production de boîtes (en tôle);
machines et machines-outils; moteurs (excepté pour
véhicules); accouplements et courroies de transmission
(excepté pour véhicules); grands instruments pour
l'agriculture; couveuses; installations et machines de
transport, de chargement et de déchargement de matières
premières; installations et machines de dépôt, de
rechargement et de traitement de matières premières pour
carrières et mines, installations sidérurgiques,
cimenteries, ainsi que pour industries chimiques;
installations et machines d'agglomération pour la sidérurgie
et les industries chimiques; installations et machines de
pelletage; installations d'enrichissement et de traitement
des minerais; lignes d'usinage et de traitement des tôles;
installations de tournage de cylindres; laminoirs à chaud et
à froid; lignes de traitement et de revêtement pour bandes,
tôles, profilés, tuyaux, pièces forgées et autres produits
sidérurgiques; installations pour la production de l'énergie
électrique; installations complètes pour la production des
métaux non-ferreux (zinc et aluminium); machines de
cokeries; installations pour la fabrication des engrais;
installations pour la production des colorants; machines de
cimenteries; chargeurs de navires, déchargeurs de navires;
centrales thermiques industrielles pour la production
d'énergie électrique; installations hydrauliques
industrielles et civiles; stations de prise et de pompage
d'eau; installations pour le bitumage de tuyaux;
installations de réfection de rigoles, installations de
réfection de chariots torpilles; machines pour couler la
fonte; installations pour la granulation de la fonte;
installations sidérurgiques de réduction directe;
installations et machines pour l'homogénéisation de matières
premières; installations pour le traitement des boues des
eaux industrielles et civiles et pour le concassage du
minerai par voie humide. Appareils et instruments scientifiques, nautiques,
géodésiques, électriques (y compris la radio),
photographiques, cinématographiques, optiques, de pesage, de
mesurage, de signalisation, de contrôle (inspection), de
secours (sauvetage) et d'enseignement; appareils
automatiques déclenchés par l'introduction d'une pièce de
monnaie ou d'un jeton; machines parlantes; caisses
enregistreuses, machines à calculer; appareils extincteurs;
installations pour la transformation et la distribution de
l'énergie; systèmes de contrôle et d'automatisation des
procédés; installations de distribution de l'électricité;
installations pour le traitement d'émulsions huileuses;
installations de dessalage d'eaux salées. Installations d'éclairage, de chauffage, de production de
vapeur, de cuisson, de réfrigération, de séchage, de
ventilation, de distribution d'eau et installations
sanitaires; hauts fourneaux, fours pour aciéries et
installations de coulée continue; installations pour le
traitement des eaux; installations anti-pollution;
installations de dessalement; fours de réchauffage pour la
sidérurgie et la métallurgie; fours de traitement thermique;
installations pour l'élimination de la poussière et
l'épuration des fumées; installations de récupération des
gaz et d'élimination des gaz polluants; installations de
distillation de l'ammoniaque; installations pour le
traitement biologiques des eaux résiduaires et des eaux
d'égout; installations pour l'épuration des eaux résiduaires
industrielles et des eaux d'égouts; installations pour la
production d'oxygène à usages industriels; installations
pour la production d'un courant d'air à souffler dans les
hauts fourneaux; installations pour la production de vapeur
à usages industriels. Véhicules, appareils de locomotion par terre, par air et par
eau; pièces pour automobiles; culbuteurs de wagons. Installations de stockage (entrepôts) et (quais) de
chargement de trains dans les mines; ouvrages portuaires;
cheminées. Construction, pour compte de tiers, d'installations
industrielles en général; montage et installation, pour
compte de tiers, de machines, de moteurs et d'appareils;
construction d'usines d'entretien pour installations
industrielles; construction de cokeries; construction de
cimenteries et de manufactures pour chaux; construction de
chantiers navals, de manufactures d'automobiles. Étude et projet, pour compte de tiers, d'installations
industrielles en général; étude et projet, pour compte de
tiers, de machines, de moteurs et d'appareils; étude et
projet d'usines d'entretien pour installations
industrielles; étude et projet de cokeries; étude et projet
de cimenteries et de manufactures pour chaux; étude et
projet de chantiers navals et de manufactures d'automobiles.
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Services de conseils pour l'organisation et la direction des
affaires, études de rentabilité. Constructions et réparations; installation d'industrie,
direction et supervision des travaux de construction,
montage (construction), mise en marche d'installations,
entretien et assistance technique d'installations
d'exploitation. Traitement de matériaux. Services de conseils en construction, étude de projets pour
installations industrielles; sélection de fournisseurs,
essais de matériaux.
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
12 - Véhicules; appareils de locomotion par terre, par air ou par eau; parties de véhicules
18 - Cuir et imitations du cuir
19 - Matériaux de construction non métalliques
Produits et services
Métaux en barres, feuilles, plaques, fils, tubes, débris;
accessoires pour constructions navales, matériaux fixes pour
chemins de fer, charpenterie. Outils, machines-outils pour travailler les bois, les
pierres et les métaux; machines et appareils divers et leurs
parties, accessoires pour constructions navales. Outils, accessoires pour constructions navales. Machines et appareils divers et leurs parties, accessoires
pour constructions navales. Machines et appareils divers et leurs parties, accessoires
pour constructions navales. Constructions navales et accessoires, constructions
aéronautiques, matériaux roulants pour chemins de fer,
tramways et chemins de fer, funiculaires; carrosserie,
automobiles, vélocipèdes et leurs parties. Sellerie. Charpenterie; chaux, gypse, ciment, briques, tuiles, marbre,
bois et d'autres matériaux pour construire, travaillés ou
coupés.
57.
EQUIPMENT FOR MEASUREMENT AND CONTROL OF LOAD MATERIAL OR SCRAP FEEDING INTO A FURNACE AND RELATIVE METHOD
An equipment for the measurement and control of load material and scrap metal feeding into an electrical arc furnace, including an automatic control device for feeding control of load material or scrap according to the energy supplied to the bath, and a measuring device for the added load material, in correlation with the automatic control device, comprising a weighing device for the furnace shell, its contents and any other components it may support.
B65G 47/51 - Dispositifs pour décharger les objets ou matériaux des transporteurs avec distribution, p. ex. automatique, aux points voulus selon des signaux non programmés, p. ex. répondant à la situation de l'approvisionnement au point de destination
C21B 13/12 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours électriques
C21C 5/52 - Fabrication de l'acier au four électrique
C21C 5/56 - Fabrication de l'acier par d'autres méthodes
F27B 3/18 - Aménagement des dispositifs de chargement
F27B 3/28 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
F27D 3/00 - ChargementDéchargementManutention des charges
F27D 3/12 - Supports ou réceptacles pour charges, mobiles ou à translation
F27D 19/00 - Aménagement des dispositifs de commande
A direct reduction system for a direct reduction of iron ore, comprising a reactor (1) having a reduction area (2) and being adapted to be loaded from above with said iron ore; a treatment and feeding line (11), to process the process gases, thus obtaining a reducing gas mixture, and feed said reducing gas mixture into the reduction area (2); a line (10) for recovering and treating an exhausted gas exiting the reactor (1), communicating upstream with the reactor (1) and downstream with said treatment and feeding line (11); wherein at least one bypass duct (30) is provided, adapted to divert at least one portion of reducing gas mixture from said treatment and feeding line (11) to said recovery and treatment line (10).
The present invention provides a reduction system and method that can be operated with any proportion of gaseous hydrogen-containing gases and gaseous hydrocarbon-containing gases having the possibility of continuing its operation, ensuring an high process availability and negligible loss of production, when the gaseous hydrogen-containing gas for any reason is not available and allow the substitution of the gaseous hydrogen-containing gas with a gaseous hydrocarbon-containing gas with minor adjustments in the plant operation. The reduction system of the invention is designed to be implemented in new and already built direct reduction plants to operate efficiently and has lower capital and operation costs.
Gas burner (1) comprising a main metal body (6), an inner lance (11) for combustible gas, at least two outer lances (10) for combustible gas, a single duct (8) for conveying pre-heated air, a regulation system for the combustible gas, a refractory unit (30), characterized in that said gas burner (1) comprises a series of nozzles (20) for the injection of the preheated air into the combustion chamber, and in that, by operating on the gas regulation system, it is possible to switch, with continuity, from a flame functioning mode of the burner to a flameless functioning mode, the latter characterized by low emissions of polluting agents.
F23D 14/22 - Brûleurs à gaz sans prémélangeur, c.-à-d. dans lesquels le combustible gazeux est mélangé à l'air de combustion à l'arrivée dans la zone de combustion avec des conduits d'alimentation en air et en gaz séparés, p. ex. avec des conduits disposés parallèlement ou se croisant
F23D 14/66 - Préchauffage de l'air de combustion ou du gaz
61.
APPARATUS FOR THE COMBUSTION OF GAS EXITING FROM A FURNACE, FOR THE PREHEATING OF SCRAPS ENTERING THE FURNACE ITSELF AND RELATED PROCESS
An apparatus for the combustion of gas exiting from an electric arc furnace for the preheating of scraps entering the furnace has an insertion device for introducting comburent substance into a preheating chamber or loading tunnel of the scrap metal having an inlet section of the scrap metal, a seal section to prevent an
uncontrolled entrance of air in the tunnel, a heating section and an unloading
section of the scrap metal in the furnace. The insertion device for introducing the comburent substance has one or more adjustable openings placed in the loading tunnel, and the apparatus has a mechanical seal device or a series of mechanical seal devices placed in the insertion or inlet section of the scrap metal in the loading tunnel or preheating chamber.
The invention provides containers with lower vibrations, such as quaking and shaking as well as noise effects, known also as hooting, honking or howling, and an effective and cost-competitive method and device to decrease such phenomena during the discharge of granular material particles from silos, hoppers, bins, reactors and in general containers for storing or processing such granular material particles. The invention comprises at least one baffle that is attached to the container wall, in the lower portion or at the bottom of the tapered discharge part of said container, protruding towards the central axis of its tapered discharge part. The baffle forms a stagnant zone in the bed of the granular material particles in contact with the container wall whereby the particles in that zone flow under the friction against other particles instead of the friction between the particles and the wall.
