WO2019238720A1 - Herstellung von karburiertem eisenschwamm mittels wasserstoffbasierter direktreduktion - Google Patents
Herstellung von karburiertem eisenschwamm mittels wasserstoffbasierter direktreduktion Download PDFInfo
- Publication number
- WO2019238720A1 WO2019238720A1 PCT/EP2019/065283 EP2019065283W WO2019238720A1 WO 2019238720 A1 WO2019238720 A1 WO 2019238720A1 EP 2019065283 W EP2019065283 W EP 2019065283W WO 2019238720 A1 WO2019238720 A1 WO 2019238720A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- carburizing
- zone
- reduction
- sponge iron
- 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.)
- Ceased
Links
Classifications
-
- 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.
- WO2014040989 Used reducing gas - called top gas - emerging from the reduction unit after the direct reduction can be used for
- Iron oxide material also contain some C0 2 .
- the top gas can be used when sealing nitrogen when charging iron oxide material into the
- the use of strongly hydrogen-containing reducing gas means that, compared to conventional direct reduction using carbon monoxide, CO or other carbon-containing gases such as methane CH 4 , for example in a natural gas-based direct reduction system, the carbon content in the sponge iron is very low. That can happen with the further
- 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
- 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 e. 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 hydrogen H 2 , 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% by volume is preferred, particularly preferably at least 90% by volume, the remainder to 100% by volume being, for example, nitrogen N 2 , carbon monoxide CO, carbon dioxide CO 2 , water vapor H 2 O, methane CH 4 .
- the carburizing gas supplied.
- the carburizing gas contains carbon in
- the carburizing gas can be, for example, natural gas, methane CH 4 , ethane C 2 H 6 , propane C 3 H 8 , butane CH 10 , carbon monoxide CO, or a mixture of several of these gases.
- the carbon-containing molecules react with that
- carburizing with methane works as follows
- elemental carbon is formed by cracking methane Due to the subsequent reduction reaction of the hydrogen H 2 formed with iron ore, water vapor (H 2 0) arises after the following reaction and this also reacts with the methane (CH 4 ) present, for example, via a reforming reaction:
- the product of this carburizing step with increased carbon content compared to 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 of non-hydrogen Fl 2 gaseous products such as C0 2 , CO, the reactions leading to carburization, or of unconverted portions of the carburizing gas such as N 2 with the reducing gas consisting predominantly of hydrogen Fl 2 introduced into the reduction unit makes one Recirculation of top gas may require separation effort.
- the carburizing gas used is at least partially withdrawn while largely avoiding mixing with the reducing gas.
- 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 removal is done in such a way that
- 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 flow from the carburizing zone to the
- 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 C0 2 reduction of the top gas intended for recirculation for example by means of C0 2 washing or C0 2 / H 2 0 reformer, is dispensed with.
- the process is also carried out without a CO 2 reduction in top gas intended for recirculation if the top gas also contains some CO 2 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 necessary, this first subset is used,
- a first portion of the used carburizing gas is combined with fresh carburizing gas components after processing - such as dedusting - again as carburizing gas
- Carburizing gas components are heated before contacting the sponge iron. So at least one member of the group consisting of the two members is heated
- Treated spent carburizing gas before or after being combined with fresh carburizing gas components before contacting the sponge iron Treated spent carburizing gas before or after being combined with fresh carburizing gas components before contacting the sponge iron.
- 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.
- Use within the process can for example also include a steam generator or a power plant.
- 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. For example, in a first stage of heating by indirect heat exchange to a temperature above 700 ° C, and then in a second stage direct heating using another type of heating - for example by partial oxidation - to set an even higher
- 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
- 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 e 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. This also supports the desired goal of keeping the carbon content in the sponge iron constant - for example, when using it later in an EAF, constant carbon content is desired.
- 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.
- elemental carbon can be added in a metered form - for example by means of a metering screw or cellular wheel.
- Sponge iron are mixed - 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 dependent on carbon dioxide C0 2 and / or
- Carbon monoxide CO and / or methane CH 4 content in the top gas regulated Carbon monoxide CO and / or methane CH 4 content in the top gas regulated.
- the regulation preferably takes place as a function of the content at the outlet from the
- Reducing gas should largely, preferably completely, be avoided.
- the size of the first subset of the top gas is dependent on nitrogen N 2 and / or carbon dioxide C0 2 and / or
- Carbon monoxide CO and / or methane CH 4 content in the top gas regulated Carbon monoxide CO and / or methane CH 4 content in the top gas regulated.
- used carburizing gas 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.
- Another object of the present application is a plant for producing carburized, direct-reduced sponge iron from iron oxide material
- the facility also includes
- a carburizing zone for carburizing the direct reduced product, with a carburizing gas supply line opening into the carburizing zone and one of the
- Carburizing zone outgoing carburizing exhaust gas line for withdrawing spent carburizing gas from the carburizing zone, and at least one device for avoiding mixing of reducing gas with carburizing gas and / or spent carburizing gas.
- Reducing gas with carburizing gas and / or spent carburizing gas may be present.
- Carburizing gas and / or used carburizing gas can, for example, be designed as follows:
- control element such as a control valve, in the carburizing exhaust gas line
- the carburizing exhaust gas line opens into a recirculation device for processing - such as cleaning, compression, heating - and recirculation of used carburizing gas into the
- Such a recirculation device can contain, for example, at least one dedusting device for processing.
- Such a recirculation device comprises a recirculation line which opens into the carburizing gas feed line in order to provide processed, used carburizing gas as a subset of the carburizing gas.
- a gas heating device is present in the carburizing gas supply line and / or in the recirculation line.
- Reduction gas heating device available. 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.
- Recirculation device from a fuel gas line opening into the reducing gas heating device.
- an outlet opens into the gas heating device
- Fuel gas supply line off It is preferably a one-stage
- Gas heating apparatus 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; that reduces the necessary
- 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.
- Iron oxide material includes a top gas line for withdrawing used
- the top gas line opens into a recycling device for processing and recycling top gas into the reducing gas feed line.
- Such a recycling device can, for example, process at least one dedusting device - preferably a dry dedusting device, since in it If, in comparison to a likewise possible wet dedusting device, complex cleaning of process waste water from the wet dedusting can be dispensed with - included.
- Such a recycling device comprises a recirculation line, which in the
- Reduction gas supply leads to the treated top gas as a subset of the
- carburized direct reduced sponge iron made of iron oxide material also a fuel line starting from the top gas line and / or the recycle device, which leads 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; that reduces the necessary
- Carburizing zone a heating system for heating the direct reduced product before entering the carburizing zone.
- a heating system for heating the directly reduced product is present in the carburizing zone.
- Carburization zone a carbon addition device available.
- a carbon addition device is present in the carburizing zone.
- 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 includes mixing devices such as, for example, a mixing chamber or a mixer for thorough mixing and an increased proportion
- 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 plant according to the invention does not include a device for reducing the CO 2 of the top gas intended for recycling.
- the system according to the invention comprises a discharge line for discharging top gas from the recycling.
- Carburization zone housed within an aggregate For example, that Aggregate be a shaft, in the upper part of which is the reduction zone, and in the lower part of which is the carburizing zone. 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.
- Carburization zone housed in different units.
- the direct reduced product can be from a product containing the reduction zone
- Direct reduction unit can be removed and then in a separate, the
- Carburizing zone containing carburizing unit are introduced.
- Directly reduced product is sponge iron.
- Carburizing units 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 spent carburizing gas can be present in the delivery line, for example. It can also be in the delivery line end of the
- Direct reduction units are available. It can also be present in the end of the carburizing unit on the delivery line, it can also be on the
- Direct reduction unit facing the end of the delivery line, or on the
- Carburizing unit facing the end of the delivery line.
- FIG. 1 schematically shows a variant of a plant according to the invention for producing carburized, direct-reduced sponge iron from iron oxide material.
- FIG. 2 schematically shows another variant of a plant according to the invention for producing carburized, direct-reduced sponge iron from iron oxide material.
- Figures 3 to 8 show various variants based on Figures 1 and 2.
- FIG. 9 schematically shows a conventional method for producing
- FIG. 1 schematically shows a variant of a system 1 according to the invention for producing carburized, directly reduced iron sponge from iron oxide material 2.
- Iron oxide material 2 to directly reduced product by means of reducing gas consisting predominantly of H 2 . It also includes one opening into the reduction zone 3
- Reduction gas gas supply line 4 It also comprises a carburizing zone 5 for carburizing the direct reduced product. One opens into the carburizing zone 5
- Carburizing gas supply line 6 One goes from the carburizing zone 5
- Carburizing exhaust gas line 7 for withdrawing spent 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.
- To produce carburized, direct-reduced iron sponge from iron oxide material 2 it is first reduced directly by means of the reducing gas, which consists at least predominantly of H 2 , while it travels through the reduction zone 3, following gravity, from top to bottom.
- the direct reduced sponge iron product enters the carburizing zone 5 following gravity, where the carbon content in the directly reduced sponge iron product is increased by means of a supplied carburizing gas, while following gravity from top to bottom is going through.
- Carburizing gas consumed in the process is largely reduced
- Avoidance of mixing with the reducing gas is at least partially withdrawn from the carburizing zone 5 via the carburizing exhaust gas line and conducted out by means of the blower 8. Removal of carburized sponge iron from the carburizing zone is indicated by a block arrow.
- FIG. 2 schematically shows 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 directly reduced product sponge iron is made from a direct reduction unit containing the reduction zone - in the case shown
- Direct reduction unit or in the delivery line end of the
- Carburizing unit be present, or at the end of the delivery line facing the direct reduction unit, or at 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.
- FIG. 3 shows, by way of example in a representation largely analogous to a section of FIG. 2, how the carburizing exhaust gas line 7 from FIG
- Recirculation device 12 for processing - such as cleaning, compression, heating - and recirculation of spent carburizing gas into the
- Carburizing gas supply line 6 opens. A first subset of the used
- Carburizing gas is recombined with fresh carburizing gas components via the recirculation line 13 after processing - such as dedusting, for example used as carburizing gas to increase the carbon content of the sponge iron.
- processing - such as dedusting, for example used 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.
- Carburizing gas supply line 6 is present. Instead, or in addition, it could also be present in the recirculation line 13. The carburizing gas is heated before it comes into contact with the sponge iron.
- FIG. 4 shows, by way of example, in a representation largely analogous to FIG. 1, 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
- Part of the used carburizing gas is supplied after processing for use as a fuel gas for heating the reducing gas. This goes from the
- Recirculation device 12 from a fuel gas line 17 opening into the reduction gas heating device 16.
- Figure 5 shows a modification of the illustration in Figure 4, as of the
- Recirculation device 12 opens into the gas heating device 15
- Fuel gas supply line 18 goes out. Another subset of the used up
- Carburizing gas is used as a fuel gas for heating the
- FIG. 6 shows in a representation largely analogous to FIG. 1 how a top gas line 19 for withdrawing used reducing gas emerges 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
- Reduction gas heating device as shown for example in Figures 3 and 4 open 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.
- FIG. 7 shows, based on FIG. 2, schematically how sponge iron 21 present in the delivery line 10 can be used to heat sponge iron before entering the carburizing zone.
- Figure 8 shows schematically based on Figure 2, as by means of a
- Carbon adding device 22 carbon can be input into the carburizing zone 5.
- FIG. 9 schematically shows a conventional method for the production of
- Directly reduced sponge iron made of iron oxide material with direct reduction using a reducing gas consisting of Fi 2 .
- the Fi 2 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.
- Most of the top gas is recirculated in a scrubber 27 after condensation of water and cleaning, while a portion is fed as fuel to a reducing gas furnace 28.
- 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. C0 2 removal is not necessary in the recirculation circuit.
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Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/972,916 US12180554B2 (en) | 2018-06-12 | 2019-06-12 | Method for carburization of HDRI produced in H2 based direct reduction process |
| MX2020013294A MX2020013294A (es) | 2018-06-12 | 2019-06-12 | Produccion de hierro esponja carburizado mediante reduccion directa basada en hidrogeno. |
| EP19728718.8A EP3807426A1 (de) | 2018-06-12 | 2019-06-12 | Herstellung von karburiertem eisenschwamm mittels wasserstoffbasierter direktreduktion |
| CA3103187A CA3103187A1 (en) | 2018-06-12 | 2019-06-12 | Method for carburization of hdri produced in h2 based direct reduction process |
| AU2019286552A AU2019286552B2 (en) | 2018-06-12 | 2019-06-12 | Producing carburized sponge iron by means of hydrogen-based direct reduction |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18177161.9 | 2018-06-12 | ||
| EP18177161.9A EP3581663A1 (de) | 2018-06-12 | 2018-06-12 | Herstellung von karburiertem eisenschwamm mittels wasserstoffbasierter direktreduktion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019238720A1 true WO2019238720A1 (de) | 2019-12-19 |
Family
ID=62620700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2019/065283 Ceased WO2019238720A1 (de) | 2018-06-12 | 2019-06-12 | Herstellung von karburiertem eisenschwamm mittels wasserstoffbasierter direktreduktion |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12180554B2 (de) |
| EP (2) | EP3581663A1 (de) |
| AU (1) | AU2019286552B2 (de) |
| CA (1) | CA3103187A1 (de) |
| MX (1) | MX2020013294A (de) |
| WO (1) | WO2019238720A1 (de) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021230307A1 (ja) | 2020-05-14 | 2021-11-18 | 日本製鉄株式会社 | 還元鉄の製造方法 |
| WO2021241272A1 (ja) | 2020-05-28 | 2021-12-02 | 日本製鉄株式会社 | 還元鉄の製造方法 |
| WO2022169392A1 (en) | 2021-02-03 | 2022-08-11 | Hybrit Development Ab | Bleed-off gas recovery in a direct reduction process |
| WO2023282824A1 (en) | 2021-07-07 | 2023-01-12 | Hybrit Development Ab | Iron briquettes |
| EP4335940A4 (de) * | 2021-06-18 | 2025-07-30 | Baoshan Iron & Steel | Vorrichtung und verfahren zur herstellung von vorreduzierten pellets auf basis gerader roste |
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| SE546651C2 (en) * | 2020-05-04 | 2025-01-07 | Hybrit Development Ab | Process for the production of carburized sponge iron |
| SE544421C2 (en) | 2020-06-26 | 2022-05-17 | Greeniron H2 Ab | Method and device for producing direct reduced metal |
| DE102021112922A1 (de) * | 2021-06-02 | 2022-12-08 | Thyssenkrupp Steel Europe Ag | Verfahren zur Direktreduktion von Eisenerz |
| SE545624C2 (en) * | 2021-06-11 | 2023-11-14 | Hybrit Development Ab | Process for the production of carburized sponge iron |
| CN113373274B (zh) * | 2021-06-15 | 2023-01-31 | 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 |
| SE545831C2 (en) * | 2021-09-20 | 2024-02-13 | Plagazi Ab | Method for Producing Steel |
| SE545863C2 (en) * | 2022-02-21 | 2024-02-27 | Hybrit Development Ab | A method and an arrangement for the production of sponge iron from iron ore |
| SE2250421A1 (en) | 2022-04-01 | 2023-10-02 | Luossavaara Kiirunavaara Ab | Method for producing steel and sponge iron manufacturing process |
| EP4389918A1 (de) * | 2022-12-19 | 2024-06-26 | Primetals Technologies Austria GmbH | Einstellung des kohlenstoffgehalts in direktreduziertem eisen |
| CN120380173A (zh) * | 2022-12-19 | 2025-07-25 | 首要金属科技奥地利有限责任公司 | 调节直接还原铁中的碳含量 |
| SE546870C2 (en) * | 2023-03-17 | 2025-03-04 | Hybrit Development Ab | A method for the production of carburized sponge iron |
| US20250163526A1 (en) * | 2023-11-22 | 2025-05-22 | Midrex Technologies, Inc. | Electric gas heating system and method in a direct reduction plant utilizing hydrogen or natural gas |
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- 2019-06-12 WO PCT/EP2019/065283 patent/WO2019238720A1/de not_active Ceased
- 2019-06-12 MX MX2020013294A patent/MX2020013294A/es unknown
- 2019-06-12 US US16/972,916 patent/US12180554B2/en active Active
- 2019-06-12 AU AU2019286552A patent/AU2019286552B2/en active Active
- 2019-06-12 EP EP19728718.8A patent/EP3807426A1/de active Pending
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021230307A1 (ja) | 2020-05-14 | 2021-11-18 | 日本製鉄株式会社 | 還元鉄の製造方法 |
| WO2021241272A1 (ja) | 2020-05-28 | 2021-12-02 | 日本製鉄株式会社 | 還元鉄の製造方法 |
| WO2022169392A1 (en) | 2021-02-03 | 2022-08-11 | Hybrit Development Ab | Bleed-off gas recovery in a direct reduction process |
| EP4335940A4 (de) * | 2021-06-18 | 2025-07-30 | Baoshan Iron & Steel | Vorrichtung und verfahren zur herstellung von vorreduzierten pellets auf basis gerader roste |
| WO2023282824A1 (en) | 2021-07-07 | 2023-01-12 | Hybrit Development Ab | Iron briquettes |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2019286552B2 (en) | 2025-01-23 |
| AU2019286552A1 (en) | 2020-12-17 |
| EP3807426A1 (de) | 2021-04-21 |
| CA3103187A1 (en) | 2019-12-19 |
| MX2020013294A (es) | 2021-02-22 |
| US12180554B2 (en) | 2024-12-31 |
| EP3581663A1 (de) | 2019-12-18 |
| US20210246521A1 (en) | 2021-08-12 |
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