EP3581663A1 - Fabrication d'éponge de fer carburé par réduction directe à base d'hydrogène - Google Patents

Fabrication d'éponge de fer carburé par réduction directe à base d'hydrogène Download PDF

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Publication number
EP3581663A1
EP3581663A1 EP18177161.9A EP18177161A EP3581663A1 EP 3581663 A1 EP3581663 A1 EP 3581663A1 EP 18177161 A EP18177161 A EP 18177161A EP 3581663 A1 EP3581663 A1 EP 3581663A1
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EP
European Patent Office
Prior art keywords
gas
carburizing
zone
reducing
reduction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18177161.9A
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German (de)
English (en)
Inventor
Robert Millner
Christian Boehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP18177161.9A priority Critical patent/EP3581663A1/fr
Priority to PCT/EP2019/065283 priority patent/WO2019238720A1/fr
Priority to EP19728718.8A priority patent/EP3807426A1/fr
Priority to US16/972,916 priority patent/US20210246521A1/en
Priority to CA3103187A priority patent/CA3103187A1/fr
Priority to MX2020013294A priority patent/MX2020013294A/es
Priority to AU2019286552A priority patent/AU2019286552A1/en
Publication of EP3581663A1 publication Critical patent/EP3581663A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/004—Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • C21B13/0093—Protecting against oxidation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C21B13/029—Introducing coolant gas in the shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/26—Increasing the gas reduction potential of recycled exhaust gases by adding additional fuel in recirculation pipes

Definitions

  • the application relates to a method for producing direct-reduced sponge iron from iron oxide material, direct reduction using an at least predominantly H2 gas.
  • top gas Used reducing gas - called top gas - emerging from the reduction unit after direct reduction can be recirculated very easily for reduction purposes, since to a significant extent practically only dust and water have to be separated from the reducing component hydrogen H2.
  • the top gas may also contain some CO2 due to the calcination of the iron oxide material used.
  • nitrogen used for sealing purposes, the top gas can also contain some nitrogen when charging iron oxide material into the reduction unit and / or when iron sponge is discharged, for example in the form of a cyclic material lock system or dynamic lock system.
  • This task is solved by a Process for the production of carburized, directly reduced iron sponge from iron oxide material, first reducing directly by means of a reducing gas consisting at least predominantly of H2, characterized in that then the carbon content in the sponge iron is increased by means of a carburizing gas supplied, whereupon the carburizing gas consumed is at least partially withdrawn while largely avoiding mixing with the reducing gas.
  • Iron oxide material is to be understood as any material which contains iron oxide and is suitable as a feedstock for direct reduction in the production of sponge iron.
  • Direct reduction processes can be lumpy material such as ore pellets, lump ore, oxide briquettes, or fine particulate material.
  • Lumpy material is suitable, for example, for direct reduction in fixed bed reactors.
  • Fine particulate material is suitable, for example, for direct reduction in fluidized bed reactors.
  • the carbon content is at least 0.5% by weight, and up to 5.0% by weight, preferably between 1.0 and 3.5% by weight, the two limits being included.
  • the carbon can be bound as iron carbide Fe3C and / or be freely available as graphitic carbon C. Chemically bound carbon as Fe3C iron carbide is better and more effective for operating an electric arc furnace (EAF).
  • the iron oxide material is first directly reduced by means of a reducing gas consisting at least predominantly of H2, for example in a reduction zone.
  • the hydrogen content of the reducing gas can be up to 100 vol%.
  • a hydrogen content of at least 80 vol% is preferred, particularly preferably at least 90 vol%, the remainder being 100 vol%, for example nitrogen N2, carbon monoxide CO, carbon dioxide CO2, water vapor H2O, methane CH4.
  • the carbon content of the sponge iron obtained in this direct reduction is then increased, for example in a carburizing zone.
  • a carbon-containing gas called a carburizing gas is fed to increase it.
  • the carburizing gas contains carbon in carbon-containing molecules.
  • the carburizing gas can be, for example, natural gas, methane CH4, ethane C2H6, propane C3H8, butane C4H10, carbon monoxide CO.
  • the carbon-containing molecules react with the sponge iron to form iron carbide Fe3C, or they react with the release of carbon C.
  • carburizing with methane works as follows 3 Fe + CH4 ⁇ Fe3C + 2 H2
  • elemental carbon is formed by cracking methane CH4 ⁇ C + 2 H2
  • H2O water vapor
  • CH4 methane
  • CO also creates CO2 and water vapor FeO + CO ⁇ Fe + CO2 3 Fe + 2 CO ⁇ Fe3C + CO2 3 Fe + CO + H2 ⁇ Fe3C + H2O CO + H2 ⁇ C + H2O CO + H2O ⁇ CO2 + H2 2 CO ⁇ C + CO2
  • the product of this carburizing step with a higher carbon content than the product of the first step - the direct reduction - sponge iron - is called carburized sponge iron in the context of this application.
  • carburization or carburization - carburizing gas is partially converted.
  • Mixing non-hydrogen H2 gaseous products such as CO2, CO, the reactions leading to carburization, or unconverted portions of the carburizing gas such as N2, with the reducing gas consisting mainly of H2 introduced into the reduction unit may make effort when recirculating top gas necessary for separation.
  • the carburizing gas used is at least partially withdrawn while largely avoiding mixing with the reducing gas.
  • the so-called spent carburizing gas which is at least partially, preferably completely, drawn off, contains both gaseous products of the carburizing reactions and unreacted portions of the carburizing gas.
  • the withdrawal is carried out in such a way that mixing of the carburizing gas used with the reducing gas is largely, preferably completely, avoided.
  • the proportion of carbon-containing gases - such as CO, CO2, CH4 or higher hydrocarbons - in the top gas is overall less than 20 vol%, preferably less than 10 vol%, particularly preferably less than 5 vol%.
  • the used carburizing gas is therefore at least partially, preferably completely, drawn off before it is mixed with the reducing gas.
  • the goal is to have very little or no gas flows from the carburizing zone to the reduction zone. This can be achieved, for example, by withdrawing so much used carburizing gas from the carburizing zone and separating so much used carburizing gas from a circuit of the carburizing gas that an upward flow from the carburizing zone into the reduction zone does not take place.
  • the spent carburizing gas is practically led out laterally, for example, from an upper area of the carburizing zone before it reaches the reduction zone above it.
  • a CO2 reduction in the top gas intended for recirculation for example by means of CO2 scrubbing or CO2 / H2O reformer, is dispensed with.
  • the process is also carried out without reducing the CO2 in the top gas intended for recirculation if the top gas also contains some CO2 due to the calcination of the iron oxide material used.
  • a first subset of the top gas is excluded from the recirculation and discharged from the circuit. If appropriate, this first subset is used, for example for use as fuel gas. The less the carburizing waste gas mixes with the reducing gas, the less top gas has to be excluded from recirculation - and the more energy-efficient it is to produce the carburized, direct-reduced sponge iron.
  • a first subset of the used carburizing gas after processing - such as dedusting - combined with fresh carburizing gas components is used again as carburizing gas to increase the carbon content of the sponge iron.
  • the carburization can be carried out in a more resource-efficient and economical manner, since unreacted components present in the used carburizing gas once again have the opportunity to contribute to the carburization.
  • the carburizing gas or the processed spent carburizing gas is heated before or after being combined with fresh carburizing gas components before it comes into contact with the sponge iron.
  • the carburization reactions run better at higher temperatures. Accordingly, the efficiency of the carburization is increased by the temperature increase.
  • the reducing gas is heated before it comes into contact with the iron oxide material.
  • a second subset of the carburizing gas used possibly after dedusting, is used as a fuel gas for heating the reducing gas.
  • Components with a calorific value in the carburizing gas used are used within the process; this reduces the necessary use of resources and increases the cost-effectiveness of the process.
  • the use within the method can also include a steam generator or a power plant, for example.
  • the reducing gas is preferably heated to over 700 ° C. by indirect heat exchange.
  • a one-stage heating is preferably carried out by indirect heat exchange, that is to say heating while maintaining the reduction potential of the reducing gas, or without oxidative destruction of the reducing potential of the reducing gas.
  • the reduction gas can also be heated in several stages, in which one stage is indirect heat exchange.
  • one stage is indirect heat exchange.
  • first stage of heating be heated to a temperature above 700 ° C by indirect heat exchange, and then in a second stage direct heating by means of another type of heating - for example by partial oxidation - to achieve an even higher temperature.
  • a further subset of the used carburizing gas is used as a fuel gas for heating the carburizing gas.
  • Components with a calorific value in the carburizing gas used are used within the process; this reduces the necessary use of resources and increases the cost-effectiveness of the process.
  • the heating of the reducing gas and the heating of the carburizing gas are carried out in the same heating unit. This requires less equipment and makes the process easier to carry out.
  • used reducing gas is withdrawn as top gas, and a first portion of the top gas is used for use as fuel gas for heating the reducing gas and / or the carburizing gas.
  • Components with a calorific value in the top gas are used within the process; this reduces the necessary use of resources and increases the cost-effectiveness of the process.
  • the carburizing gas contains components which react exothermally with the directly reduced sponge iron.
  • the carburization reactions run better at higher temperatures. Accordingly, the efficiency of the carburization is increased by the temperature increase.
  • the sponge iron is heated before and / or while the carburizing gas is being supplied.
  • the carburization reactions run better at higher temperatures. Accordingly, the efficiency of the carburization is increased by the temperature increase.
  • solid carbon C is added to the sponge iron before and / or during and / or after the carburizing gas is supplied. This complements the increase in carbon content using the carburizing gas.
  • the solid carbon can be anthracite, for example.
  • elemental carbon can be added in a metered form - for example by means of a metering screw or cellular wheel.
  • it can also be mixed with the sponge iron - for example in a mixing chamber or a mixer in order to obtain thorough mixing and an increased proportion of iron carbide.
  • a mixer is understood to mean an assembly with moving internals, whereas a mixing chamber has no moving internals.
  • the size of the second subset of the carburizing gas used is regulated as a function of the CO2 and / or CO and / or CH4 content in the top gas.
  • the regulation preferably takes place as a function of the content at the outlet from the reduction zone.
  • Mixing of the used carburizing gas with the circuit of the reducing gas should largely, preferably completely, be avoided.
  • Monitoring the top gas for components that indicate mixing has taken place - CO2 and / or CO and / or CH4 - warns of mixing.
  • Increasing the second subset of the carburizing gas used helps to prevent any mixing that may take place.
  • the size of the first portion of the top gas is regulated as a function of N2 and / or CO2 and / or CO and / or CH4 content in the top gas.
  • An enrichment of these components in the recirculated top gas would be disadvantageous for the efficiency of the direct reduction. Such components should therefore at least partially be removed from the recirculation cycle.
  • Monitoring of the top gas for components that are due to a mixing of used carburizing gas and Indicating reducing gas - CO2 and / or CO and / or CH4 - warns of mixing.
  • the negative effects of any mixing of carburizing gas or carburizing gas used with the reducing gas can be reduced by increasing the first portion of the top gas.
  • the use of the discharged gas as the first subset allows it to be used for heating purposes. Components with a calorific value in the top gas are used within the process; this reduces the necessary use of resources and increases the cost-effectiveness of the process.
  • a gas heating device is present in the carburizing gas supply line and / or in the recirculation line.
  • the carburization reactions run better at higher temperatures. Accordingly, the efficiency of the carburization is increased by the temperature increase.
  • a reducing gas heating device is present in the reducing gas feed line. It is preferably a one-stage reduction gas heating device. It is preferably an indirect heat exchanger. However, it can also be a multi-stage heating device in which one stage is an indirect heat exchanger.
  • the carburizing exhaust gas line and / or the recirculation device starts with a fuel gas line opening into the reducing gas heating device.
  • the carburizing exhaust gas line and / or the recirculation device starts with a fuel gas supply line which opens into the gas heating device. It is preferably a single-stage gas heating device. It is preferably an indirect heat exchanger. Components with a calorific value present in the used carburizing gas can then be used within the process; this reduces the necessary use of resources and increases the cost-effectiveness of the process.
  • the reducing gas heating device and the gas heating device are both integrated in a heating device, and the fuel gas line and / or the fuel gas supply line and / or open into the heating device. This requires less equipment.
  • the plant for the production of carburized, direct-reduced sponge iron from iron oxide material comprises a top gas line for withdrawing used reducing gas from the reduction zone.
  • the top gas line opens into a recycling device for processing and recycling top gas into the reducing gas feed line.
  • a recycling device can, for example, contain at least one dedusting device for processing - preferably a dry dedusting device, since in this case, in comparison to a likewise possible wet dedusting device, there is no need for complex cleaning of process waste water from the wet dedusting.
  • Such a recycle device comprises a recirculation line which opens into the reducing gas supply line in order to make processed top gas available as a subset of the reducing gas.
  • the plant for producing carburized, direct-reduced sponge iron from iron oxide material also comprises one of the Topgastechnisch and / or the recycle device outgoing fuel line, which opens into the reducing gas heating device and / or into the gas heating device and / or the heating device. Components with a calorific value in the top gas can then be used within the process; this reduces the necessary use of resources and increases the cost-effectiveness of the process.
  • the fuel line viewed in the flow direction of the top gas, extends from the reduction zone after the dedusting device. This saves parts of the system that have passed through later, such as compressors.
  • a heating system for heating the directly reduced product is present in the carburizing zone.
  • a carbon addition device is present between the reduction zone and the carburization zone.
  • a carbon addition device is present in the carburizing zone.
  • a carbon addition device is present behind the carburizing zone, viewed from the reduction zone in the direction of flow of the directly reduced product.
  • the carbon addition device is suitable for adding solid carbon. It can include metering devices such as a metering screw or cellular wheel. According to a preferred embodiment, it also comprises mixing devices such as, for example, a mixing chamber or mixer, in order to enable thorough mixing and an increased proportion of iron carbide.
  • the system according to the invention also comprises a regulating device for regulating the gas flow in the fuel gas line and / or the fuel gas feed line as a function of measured values obtained from the top gas.
  • a control device can be one of the devices for avoiding mixing of reducing gas with carburizing gas and / or used carburizing gas.
  • the system according to the invention also includes a regulating device for regulating the gas flow in the fuel line as a function of measured values obtained from the top gas.
  • the system according to the invention does not include a device for reducing the CO2 of the top gas intended for recycling.
  • the system according to the invention comprises a discharge line for discharging top gas from the recycling.
  • the reduction zone and the carburization zone are accommodated within one unit.
  • the aggregate can be a shaft in the upper part of which the reduction zone is located and in the lower part of which the carburizing zone is located. Iron oxide material is fed into the shaft at the top and travels downward due to gravity. It is reduced directly. After passing through the reduction zone, the directly reduced product enters the carburizing zone. After passing through the carburizing zone, it emerges from the shaft.
  • the reduction zone and the carburization zone are accommodated in different units.
  • the direct reduced product can be from a product containing the reduction zone Direct reduction unit are removed and then introduced into a separate carburizing unit containing the carburizing zone.
  • the directly reduced product is sponge iron.
  • Direct reduction unit and carburizing unit are connected via a delivery line for the delivery of sponge iron into the carburizing unit.
  • the at least one device for avoiding mixing of reducing gas with carburizing gas and / or used carburizing gas can be present in the delivery line, for example. It can also be present in the end of the direct reduction unit on the delivery line side. It can also be present in the end of the carburizing unit on the delivery line side, it can also be present on the end of the delivery line facing the direct reduction unit, or on the end of the delivery line facing the carburizing unit.
  • Figure 1 schematically shows a variant of a system 1 according to the invention for producing carburized, direct-reduced sponge iron from iron oxide material 2. It comprises a reduction zone 3 for the direct reduction of input iron oxide material 2 to the directly reduced product by means of reducing gas consisting predominantly of H2. It also includes a reduction gas gas feed line 4 opening into the reduction zone 3. It also comprises a carburizing zone 5 for carburizing the directly reduced product.
  • a carburizing gas supply line 6 opens into the carburizing zone 5.
  • a carburizing exhaust gas line 7 extends from the carburizing zone 5 for withdrawing used carburizing gas from the carburizing zone 5.
  • the system also includes at least one device for avoiding mixing of reducing gas with carburizing gas and / or spent carburizing gas, here a blower 8 in the carburizing exhaust gas line 7.
  • the blower 8 transports used carburizing gas at least partially out of the carburizing zone and thereby mixing it with the reducing gas largely avoided.
  • the direct reduced product sponge iron enters the carburizing zone 5 following the force of gravity, where the carbon content in the direct reduced product sponge iron is increased by means of a supplied carburizing gas, while it is passed from top to bottom following the force of gravity.
  • Carburizing gas consumed in the process is withdrawn from the carburizing zone 5 via the carburizing exhaust gas line and conducted out, at least partially, by mixing with the reducing gas. Removal of carburized sponge iron from the carburizing zone is indicated by a block arrow.
  • Figure 2 shows schematically another variant of a system 1 according to the invention for producing carburized, direct-reduced sponge iron from iron oxide material 2.
  • carburization zone 5 and reduction zone 3 are accommodated in different units.
  • the direct reduced product sponge iron is removed from a direct reduction unit containing the reduction zone - in the case shown a fixed bed reactor 9 - and then introduced via the delivery line 10 into a separate carburizing unit 11 containing the carburizing zone.
  • the delivery line 10 there may also be an additional conveying element, such as a cellular wheel sluice, or a dynamic gas barrier.
  • an additional conveying element such as a cellular wheel sluice, or a dynamic gas barrier.
  • the device for avoiding mixing of reducing gas with carburizing gas and / or spent carburizing gas - represented by the blower 8 in the illustrated case - could be present in the delivery line instead of or in addition to the arrangement shown in the carburizing exhaust gas line, or in the delivery line end of the direct reduction unit, or be present in the end of the carburizing unit on the delivery line side, or on the end of the delivery line facing the direct reduction unit, or on the end of the delivery line facing the carburizing unit. For better clarity, these variants are not shown. Removal of carburized sponge iron from the carburizing zone is indicated by a block arrow.
  • Figure 3 shows an example of a section of the Figure 2 largely analogous representation, such as the carburizing exhaust gas line 7 Figure 2 in a recirculation device 12 for processing - such as cleaning, compression, heating - and recirculation of used carburizing gas opens into the carburizing gas supply line 6.
  • a first subset of the used carburizing gas is used again after processing - such as for example dedusting - combined with fresh carburizing gas components via the recirculation line 13 as carburizing gas to increase the carbon content of the sponge iron.
  • the feed of the fresh carburizing gas components is indicated by the arrow 14. Removal of carburized sponge iron from the carburizing zone is indicated by a block arrow.
  • Figure 4 shows one example Figure 1 largely analogous representation of how a reducing gas heating device is present in the reducing gas feed line, in the illustrated case an indirect heat exchanger 16 for the one-stage heating of the Reduction gas before it comes into contact with the iron oxide material 2.
  • a second subset of the used carburizing gas is supplied after processing for use as fuel gas for heating the reducing gas.
  • the recirculation device 12 starts with a fuel gas line 17 opening into the reducing gas heating device 16.
  • Figure 5 shows in a modification of the representation in Figure 4 how a recirculation device 12 emanates a fuel gas supply line 18 opening into the gas heating device 15.
  • a further subset of the carburizing gas used is supplied for use as fuel gas for heating the carburizing gas.
  • Figure 6 points to one Figure 1 largely analogous representation of how a top gas line 19 proceeds for withdrawing used reducing gas from the reduction zone.
  • a fuel line 20 starts from it and can - for better clarity not shown separately - in a gas heating device 15 or a reducing gas heating device such as in the Figures 3 and 4 shown lead to supply a first portion of the top gas for use as a fuel gas for heating the reducing gas and / or the carburizing gas.
  • Figure 7 indicates based on Figure 2 schematically, how can be heated by means of a heating system 21 in the delivery line 21 sponge iron before entering the carburizing zone.
  • Figure 8 indicates based on Figure 2 schematically how carbon can be entered into the carburizing zone 5 by means of a carbon addition device 22.
  • Figure 9 shows schematically a conventional method for producing direct-reduced sponge iron from iron oxide material, wherein direct reduction is carried out by means of a reducing gas consisting of H2.
  • the H2 reduction gas is introduced into the reduction reactor 24 via the reduction gas feed line 23.
  • Sponge iron 25 is removed from the reduction reactor 24 below.
  • Reducing gas consumed after the reduction is removed as top gas via the top gas line 26 from the top of the reduction reactor 24.
  • the top gas is largely recirculated in a scrubber 27 after condensation of water and cleaning, while a subset is used as fuel Reduction gas furnace 28 is fed.
  • Fresh hydrogen 29 is mixed into the recirculated top gas. After preheating with exhaust gas from the reduction gas furnace 28, heating is carried out in the reduction gas furnace 28 and then introduced into the reduction unit. CO2 removal is not necessary in the recirculation cycle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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EP18177161.9A 2018-06-12 2018-06-12 Fabrication d'éponge de fer carburé par réduction directe à base d'hydrogène Withdrawn EP3581663A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP18177161.9A EP3581663A1 (fr) 2018-06-12 2018-06-12 Fabrication d'éponge de fer carburé par réduction directe à base d'hydrogène
PCT/EP2019/065283 WO2019238720A1 (fr) 2018-06-12 2019-06-12 Fabrication d'éponge de fer carburée par réduction directe à base d'hydrogène
EP19728718.8A EP3807426A1 (fr) 2018-06-12 2019-06-12 Fabrication d'éponge de fer carburée par réduction directe à base d'hydrogène
US16/972,916 US20210246521A1 (en) 2018-06-12 2019-06-12 Method for Carburization of HDRI produced in H2 based Direct Reduction Process
CA3103187A CA3103187A1 (fr) 2018-06-12 2019-06-12 Methode de carburation de fer de reduction-fusion produit par un procede de reduction directe base sur l'hydrogene (h2)
MX2020013294A MX2020013294A (es) 2018-06-12 2019-06-12 Produccion de hierro esponja carburizado mediante reduccion directa basada en hidrogeno.
AU2019286552A AU2019286552A1 (en) 2018-06-12 2019-06-12 Producing carburized sponge iron by means of hydrogen-based direct reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18177161.9A EP3581663A1 (fr) 2018-06-12 2018-06-12 Fabrication d'éponge de fer carburé par réduction directe à base d'hydrogène

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EP3581663A1 true EP3581663A1 (fr) 2019-12-18

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EP18177161.9A Withdrawn EP3581663A1 (fr) 2018-06-12 2018-06-12 Fabrication d'éponge de fer carburé par réduction directe à base d'hydrogène
EP19728718.8A Pending EP3807426A1 (fr) 2018-06-12 2019-06-12 Fabrication d'éponge de fer carburée par réduction directe à base d'hydrogène

Family Applications After (1)

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EP19728718.8A Pending EP3807426A1 (fr) 2018-06-12 2019-06-12 Fabrication d'éponge de fer carburée par réduction directe à base d'hydrogène

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US (1) US20210246521A1 (fr)
EP (2) EP3581663A1 (fr)
AU (1) AU2019286552A1 (fr)
CA (1) CA3103187A1 (fr)
MX (1) MX2020013294A (fr)
WO (1) WO2019238720A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113373274A (zh) * 2021-06-15 2021-09-10 中冶赛迪工程技术股份有限公司 用于全氢竖炉的煤气处理工艺
WO2022253683A1 (fr) * 2021-06-02 2022-12-08 Thyssenkrupp Steel Europe Ag Procédé de réduction directe de minerai de fer
SE2150742A1 (en) * 2021-06-11 2022-12-12 Hybrit Dev Ab Process for the production of carburized sponge iron
WO2023043358A1 (fr) * 2021-09-20 2023-03-23 Plagazi Ab Procédé de production d'acier
EP4389918A1 (fr) * 2022-12-19 2024-06-26 Primetals Technologies Austria GmbH Réglage de la teneur en carbone dans du fer à réduction directe
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WO2024132797A1 (fr) * 2022-12-19 2024-06-27 Primetals Technologies Austria GmbH Ajustement de la teneur en carbone dans du fer à réduction directe

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EP3807426A1 (fr) 2021-04-21
US20210246521A1 (en) 2021-08-12

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