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EP4599096A1 - Masse fondue de fer issue d'aggloméré - Google Patents

Masse fondue de fer issue d'aggloméré

Info

Publication number
EP4599096A1
EP4599096A1 EP23777290.0A EP23777290A EP4599096A1 EP 4599096 A1 EP4599096 A1 EP 4599096A1 EP 23777290 A EP23777290 A EP 23777290A EP 4599096 A1 EP4599096 A1 EP 4599096A1
Authority
EP
European Patent Office
Prior art keywords
reduction
iron
containing material
sinter
iron oxide
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.)
Pending
Application number
EP23777290.0A
Other languages
German (de)
English (en)
Inventor
Bernhard Hiebl
Hanspeter Ofner
Norbert Rein
Johann Wurm
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
Original Assignee
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
Publication of EP4599096A1 publication Critical patent/EP4599096A1/fr
Pending legal-status Critical Current

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
    • C21B13/0073—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
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C21B13/002—Reduction of iron ores by passing through a heated column of carbon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/143—Injection of partially reduced ore into a molten bath
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Definitions

  • the application relates to methods and devices for producing an iron melt from iron oxide-containing material which comprises sinter, wherein a reducing gas containing at least hydrogen is used for pre-reduction of the iron oxide-containing material and the product of the pre-reduction is melted.
  • Hydrogen can be used as the only reducing gas, or in combination with other gases based on carbon from natural gas or on coal or coke, for example.
  • the ratio of their contribution to the reducing gas can be changed by mixing different amounts.
  • the treatment optionally also comprising adjustment of a carbon content in the melt.
  • the reducing gas contains at least 60 vol% hydrogen as a reducing component. It can also consist of hydrogen. If necessary, the reducing gas also contains one or more gaseous carbon carriers as an additional reducing component or components. Carbon carriers are provided, for example, by natural gas; these are, for example, carbon monoxide CO or methane CH 4 introduced by natural gas or produced from natural gas.
  • Green hydrogen is produced, for example, by electrolysis of water using electricity from renewable energies, or by gasification or fermentation of biomass, or steam reforming of biogas - what all types of green hydrogen production have in common is that it is produced CO2-free.
  • blue hydrogen the CO2 produced during production is stored so that it does not enter the atmosphere; for example, if it was produced by sequestering the carbon dioxide CO2 that is produced.
  • turquoise hydrogen CO2 is produced by separating the carbon dioxide that is produced.
  • pink hydrogen hydrogen is produced using nuclear power.
  • grey hydrogen it is produced from fossil fuels - for example from natural gas using steam reforming - with the CO2 produced being predominantly released into the atmosphere.
  • the ratio of the proportions of hydrogen and carbon carriers in the Reducing gas can be varied, for example, by combining different amounts when preparing the reducing gas. For example, it can be varied so that the proportion of hydrogen in the reducing gas increases.
  • the reducing gas is the gas introduced into the reduction reactor with its composition and temperature at the time of introduction. Before this composition and temperature are given, a precursor of the reducing gas is present, on the basis of which the reducing gas is prepared.
  • the preparation can include, for example, the addition of further components, heating, reforming.
  • the preparation can also include chemical reactions taking place in the precursor without external intervention, which, for example, change the chemical composition or the temperature. If the preparation is changed, the proportion of hydrogen in the reducing gas can change.
  • the iron melt produced according to the invention preferably has a carbon content of 1.0 mass% - 5 mass%. It consists predominantly of iron - it is a liquid, pig iron-like product; the term liquid, pig iron-like product is used in this application as a synonym for the term iron melt for the iron melt produced according to the invention.
  • the liquid, pig iron-like product preferably with a carbon content of 1.0 mass% - 5 mass%, is "similar" to pig iron from a blast furnace from the perspective of a steel production process - for example LD/BOF - that is, it can be processed largely in the same way as pig iron from a blast furnace, i.e. following the blast furnace route of steel production with the exception of the blast furnace.
  • the carbon content of the liquid, pig iron-like product is particularly preferably at least 2.0% by mass, very particularly preferably at least 2.5% by mass.
  • the carbon content of the liquid, pig iron-like product is particularly preferably up to 4.7% by mass, very particularly preferably up to 4.5% by mass.
  • the carbon carriers can be solid carbon carriers and/or liquid carbon carriers and/or gaseous carbon carriers.
  • the carbon carriers can include, for example, coal dust, coke breeze, graphite dust or natural gas.
  • the carbon carriers can also come partly or entirely from carbon-neutral sources, for example from biomass such as charcoal; this improves the CO2 balance of the process.
  • the carbon carriers can be introduced via lances or underbath nozzles, for example.
  • the particle size of the sinter according to ISO4701 Third edition 2008 10 01 is preferably in the range 5 mm - 40 mm, particularly preferably in the range 8 mm - 32 mm, very particularly preferably in the range 10 mm - 25 mm, whereby the limits of the range specifications are included with a sieving efficiency of up to 5%.
  • the sieving efficiency is also referred to as sieving efficiency or sieving quality.
  • the grain stability of the sinter is such that the result of an RDI test carried out on a sample of the sinter in accordance with ISO 4696-1 Third edition 2015-09-01 shows that the proportion of particles with a particle size of less than 3.15 mm is less than or equal to 30%.
  • the grain stability is determined using the RDI test in accordance with ISO 4696-1 Third edition 2015-09-01; RDI stands for reduction degradation index. With such grain stability, poor gassing and unstable process control during pre-reduction as a result of grain disintegration can be avoided.
  • the sinter has a basicity B2 greater than 1.
  • the basicity B2 is preferably up to 2.5, particularly preferably up to 2.2.
  • the basicity B2 is given by the ratio of the weight percentages of calcium oxide CaO and silicon dioxide SiO2 in a sample.
  • Basicity B2 CaO/SiO2 (each weight percentage in a sample).
  • the slag produced in the melting plant preferably has a basicity B2, which lies in a range of values from 0.9 to 1.2, including the two limit values.
  • Basicity B4 (CaO + MgO)/(SiO2+AI2O3) (each weight percentage in a sample).
  • the iron oxide-containing material is introduced into the reduction reactor in an input area largely uniformly over the cross-sectional area of the input area.
  • the relevant cross-sectional area is the cross-sectional area perpendicular to the direction of movement of the iron oxide-containing material as it passes through the reduction reactor from an input area for the input of the iron oxide-containing material to a removal area for the removal of the iron oxide-containing material obtained during the pre-reduction. solid pre-reduced product.
  • a largely uniform input leads to a largely uniform gassing of the fixed bed and thus a largely uniform reduction in the fixed bed. This helps to avoid local differences in the degree of metallization and in the stability of the particles in the fixed bed. This helps to ensure that the iron oxide-containing material migrates through the reduction reactor largely evenly.
  • the aim is to achieve uniform migration, but deviations will still occur during operation for operational reasons, which are largely covered by the formulation. Local material blockages are thus largely avoided; the aim is to avoid local material blockages entirely; however, local material blockages can still occur during operation for operational reasons, which are largely avoided and covered by the formulation.
  • the solid pre-reduced product obtained during pre-reduction is removed from the reduction reactor in a removal area.
  • removal takes place over the entire cross-sectional area of the removal area, for example over several discharge screws that largely cover the cross-sectional area of the removal area.
  • Over the entire cross-sectional area is to be understood as the opposite of selectively at one location or in a limited part of the cross-sectional area; removal should therefore not take place selectively at one location or in a limited part of the cross-sectional area, so that there is an increased reduction in the amount of material at this location or this limited part, but rather removal should take place largely evenly over the entire cross-sectional area, so that the material level is largely constant everywhere across the cross-sectional area.
  • the relevant cross-sectional area is the cross-sectional area perpendicular to the direction of movement of the iron oxide-containing material from an input area for the input of the iron oxide-containing material to a removal area for the removal of the solid pre-reduced product obtained in the pre-reduction.
  • the reducing gas is introduced into the reduction reactor in an introduction area.
  • the reducing gas is introduced into the reduction reactor largely uniformly over the cross-sectional area of the introduction area.
  • Uniformly across the cross-sectional area is to be understood as the opposite of selectively at one location or in a limited part of the cross-sectional area.
  • largely uniform means that reducing gas is not only introduced selectively or in a limited part, for example at the edge of the reduction reactor, but also away from the edge towards the middle or in the middle of the reduction reactor. This can be achieved, for example, by gas distribution pipes that reach into the interior of the reduction reactor or that cross the interior - in the case of a round cross-sectional area of the interior, for example diametrically or as a secant.
  • the relevant cross-sectional area is the cross-sectional area perpendicular to the direction of movement of the iron oxide-containing material from an input area for input of the iron oxide-containing material to a removal area for removal of the solid product of the direct reduction process.
  • the introduction can be implemented, for example, as shown in WO2013156548A1.
  • the solid pre-reduced product obtained during the pre-reduction is fed from the reduction reactor into the melting device via a bunker device, whereby the bunker device acts as a pressure lock.
  • the bunker device acts as a pressure lock. This means that a change in the pressure of the atmosphere surrounding the solid product is carried out. This takes place in the bunker device, which can be operated as a pressure lock. This can prevent reduction gas from the reduction reactor from entering the melting device, or that gas flows from the melting device into the reduction reactor.
  • a further subject matter of the present application is a process for producing steel, wherein the production of steel is carried out on the basis of an iron melt produced according to the invention.
  • the LD/BOF process is used in the production of steel.
  • a further subject matter of the present application is a reduction reactor for pre-reduction of the iron oxide-containing material, which is designed as a reduction shaft, characterized in that the reduction shaft has an input area for input of the iron oxide-containing material; a removal area for removal of the solid pre-reduced product obtained in the pre-reduction, an inlet area for introducing reducing gas, wherein the reduction shaft is conical below the inlet area with a wall angle to the vertical of less than 20°, preferably less than 10°, wherein it narrows from the inlet area to the removal area.
  • the input area is in the upper area of the reduction shaft and the removal area is in the lower area of the reduction shaft.
  • the introduction area is located between the input area and the removal area. Below the introduction area, the reduction shaft is conical and narrows towards the removal area; the diameter therefore becomes smaller towards the removal area.
  • the conical design with a small wall angle counteracts the formation of bridges and thus uneven migration through the reduction shaft. What is desired is largely uniform migration, which in connection with bulk materials is also referred to as mass flow. Local material jams are thus largely avoided. Largely uniform migration leads to largely uniform Gassing of the fixed bed and thus largely uniform reduction in the fixed bed. This helps to avoid local differences in the degree of metallization and in the stability of the particles in the fixed bed. It has been shown that the conical design with a small wall angle of the reduction shaft below the inlet area counteracts the occurrence of problems with uniform removal of the solid product. It is therefore possible to achieve a stable process even with the sintering portion of the iron oxide-containing material and the hydrogen portion of the reduction gas according to the process according to the invention.
  • a process according to the invention can be carried out using such a reduction reactor.
  • the reduction shaft above the introduction area is largely conical, with a wall angle of less than 3° to the vertical, preferably at least 1° to the vertical; it widens towards the introduction area.
  • largely conical means that there can be cylindrical sections as well as conical sections. This design counteracts the formation of bridges and shaft hangers and thus uneven movement through the reduction shaft. If the longitudinal axis of the reduction shaft is arranged vertically, the input area is in the upper area of the reduction shaft, the removal area in the lower area of the reduction shaft. The introduction area is located between the input area and the removal area.
  • the reduction reactor comprises an input device for inputting iron oxide-containing material, which is suitable for largely uniform input over the cross-sectional area of the reduction shaft in the input region.
  • the input device includes a gimbal distributor as shown in WQ2006056350A1.
  • the relevant cross-sectional area is the cross-sectional area perpendicular to the direction of movement of the iron oxide-containing material as it travels through the reduction shaft from the input area for input of the iron oxide-containing material to the removal area for removal of the solid product of the direct reduction process. This is also perpendicular to the longitudinal axis of the reduction shaft.
  • the input device is suitable for input while largely avoiding segregation of the iron oxide-containing material according to the size and/or density of its particles.
  • the input device preferably comprises a control and/or regulating device which is designed for flexible regulation and/or control of the input.
  • a regulating device can, for example, automatically use measurement data from thermocouples suitable for determining the gas temperature above the bed in the reduction shaft, and measurement data from thermocouples suitable for determining the gas temperature in the bed in the reduction shaft for regulation.
  • the operator can specify a distribution profile which is then implemented in a controlled and/or regulated manner.
  • a discharge device is present in the removal area, which is suitable for removal over the cross-sectional area of the reduction shaft in the removal area.
  • the discharge device comprises several discharge screws that largely cover the cross-sectional area of the removal area.
  • the relevant cross-sectional area is the cross-sectional area perpendicular to the direction of movement of the iron oxide-containing material from an input area for input of the iron oxide-containing material to a removal area for removal of the solid product of the direct reduction process. This is also perpendicular to the longitudinal axis of the reduction shaft.
  • the inlet device comprises several inlet pipes that largely cover the cross-sectional area of the extraction area.
  • the relevant cross-sectional area is the cross-sectional area perpendicular to the direction of movement of the iron oxide-containing material from an input area for input of the iron oxide-containing material to a discharge area for discharge of the solid product of the direct reduction process. This is also perpendicular to the longitudinal axis of the reduction shaft.
  • a further subject matter of the present application is a plant for carrying out the process according to the invention for producing an iron melt, characterized in that it comprises a reduction reactor for the direct reduction of iron oxide-containing material according to one of claims 12 to 13, a melting device, an addition device for introducing solid product of the process for direct reduction into the melting device.
  • the melting device comprises devices for supplying electrical energy.
  • the addition device comprises a bunker device acting as a pressure lock.
  • the system for carrying out the method according to the invention also comprises a device for adjusting the carbon content; for example, a device for adding carbon-containing material to the melting device, or a device for adding oxygen to the melting device.
  • a device for adjusting the carbon content thus acts, for example, by adding carbon-containing material to the melting device and/or reducing carbon-containing material present in the melting device - for example in the solid product fed into the melting device and/or in the molten iron.
  • the reduction can be carried out, for example, by means of a reaction with oxygen; gases produced can be extracted from the molten iron or the melting device.
  • a further subject matter of the present application is a machine-readable program code for a signal processing device, characterized in that the program code has control and/or regulating commands which cause the signal processing device to carry out a method according to the invention.
  • a further subject matter is a computer program product comprising commands for a signal processing device which, when the program for the signal processing device is executed, cause it to carry out the method according to one of claims 1 to 11.
  • a further subject matter of the present application is a storage medium with a machine-readable program code according to the invention stored thereon.
  • a further subject matter is a storage medium with a computer program stored thereon for carrying out a method according to one of claims 1 to 11.
  • Figure 1 shows schematically a system according to the invention.
  • FIG. 1 shows a schematic diagram of a plant 10 which comprises a reduction reactor 20 for the direct reduction of iron oxide-containing material 30, a melting device 40 and an addition device 50 for feeding solid product produced in the reduction reactor 20 into the melting device 40.
  • a bunker device 60 which acts as a pressure lock and is included in the addition device 50.
  • a device for adjusting the carbon content 70 - which can be, for example, a device for adding carbon-containing material to the melting device 40, or a device for adding oxygen to the melting device 40.
  • a reducing gas 90 containing more than 60% by volume of hydrogen H2 is fed to the reduction reactor 20 containing the iron oxide-containing material 30 for pre-reduction.
  • the particle size of the sinter is, for example, in the range 8 mm - 32 mm. Its basicity B2 is preferably greater than 1.
  • the temperature of the iron oxide-containing material 30 fed into the reduction reactor 20 is below the temperature of the reducing gas 90, it is heated in the reduction reactor 20 by the reducing gas 90; a heating rate of, for example, 10°C per minute is favorable.
  • the solid pre-reduced product obtained during the pre-reduction in the reduction reactor 10 still contains iron oxides. Preferably, it is metallized to at least 70%. It is fed from the reduction reactor 20, optionally via the optional bunker device 60, into the melting device 40. There, the iron melt is produced from it, preferably with a carbon content of 1 - 5 mass%.
  • the treatment for producing the iron melt 80 comprises at least energy supply for producing a melt and reducing at least a portion of the iron oxides contained in the solid pre-reduced product. Optionally, it also comprises adjusting a carbon content in the melt using the optional device for adjusting the carbon content 70.
  • the energy supply comes mainly from electricity.
  • a slag 100 is produced, the basicity B2 of which is preferably between 0.9 and 1.2.
  • the representation of an optional The existing addition device for adding additives to the melting device 40 is omitted for reasons of clarity.
  • Figure 2 shows a schematic enlarged view of the reduction reactor 20 for pre-reduction of the iron oxide-containing material 30. It is designed as a reduction shaft, having an input area A for input of the iron oxide-containing material 30, a removal area B for removal of the solid pre-reduced product obtained during the pre-reduction, and an inlet area C for the introduction of reducing gas 90.
  • the reduction shaft 20 is conical below the inlet area C. Its wall angle to the vertical is less than 20°, and it narrows from the inlet area C to the removal area B.
  • the reduction shaft above the inlet area is conical with a wall angle between 1° and 3° to the vertical - not exaggerated to scale here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

L'invention concerne un procédé de production d'une masse fondue de fer (80) à partir d'un matériau contenant de l'oxyde de fer (30), un gaz de réduction (90) contenant au moins de l'hydrogène étant introduit dans un réacteur de réduction (20), contenant le matériau contenant de l'oxyde de fer (30), pour une préréduction. Le matériau contenant de l'oxyde de fer (30) comprend au moins 35 % en masse d'aggloméré, et le gaz de réduction (90) comprend au moins 60 % en volume d'hydrogène H2. Le produit solide préréduit obtenu lors de l'étape de préréduction est alimenté depuis le réacteur de réduction (20) dans un dispositif de fusion (40) et est soumis à un traitement comprenant au moins les étapes suivantes : - introduire de l'énergie pour générer une masse fondue, ladite énergie étant introduite sensiblement sous la forme d'électricité, et - réduire au moins certains des oxydes de fer contenus dans le produit préréduit solide. Le traitement peut également comprendre l'ajustement d'une teneur en carbone dans la masse fondue. Un réacteur de réduction (20) pour préréduction est réalisé sous la forme d'un arbre de réduction qui comporte une région d'alimentation (A) pour l'alimentation dans le matériau contenant de l'oxyde de fer (30) ; - une région de retrait (B) pour retirer le produit pré-déduit solide obtenu dans l'étape de préréduction ; et - une région d'introduction (C) pour introduire un gaz de réduction (90), l'arbre de réduction étant conique au-dessous de la région d'introduction (C), avec un angle de paroi à la verticale inférieur à 20°, et s'effilant de la région d'introduction à la région de retrait (B). Un système de mise en œuvre du procédé selon l'invention comprend : - un réacteur de réduction (20) pour la réduction directe de matériau contenant de l'oxyde de fer ; - un dispositif de fusion (60) ; et - un dispositif d'alimentation (50) pour alimenter le produit solide obtenu par le procédé de réduction directe dans le dispositif de fusion (60).
EP23777290.0A 2022-10-05 2023-09-27 Masse fondue de fer issue d'aggloméré Pending EP4599096A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22199799.2A EP4350010A1 (fr) 2022-10-05 2022-10-05 Fonte de fer en frittage
PCT/EP2023/076751 WO2024074375A1 (fr) 2022-10-05 2023-09-27 Masse fondue de fer issue d'aggloméré

Publications (1)

Publication Number Publication Date
EP4599096A1 true EP4599096A1 (fr) 2025-08-13

Family

ID=83598308

Family Applications (2)

Application Number Title Priority Date Filing Date
EP22199799.2A Withdrawn EP4350010A1 (fr) 2022-10-05 2022-10-05 Fonte de fer en frittage
EP23777290.0A Pending EP4599096A1 (fr) 2022-10-05 2023-09-27 Masse fondue de fer issue d'aggloméré

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP22199799.2A Withdrawn EP4350010A1 (fr) 2022-10-05 2022-10-05 Fonte de fer en frittage

Country Status (6)

Country Link
EP (2) EP4350010A1 (fr)
JP (1) JP2025536139A (fr)
KR (1) KR20250086667A (fr)
CN (1) CN119998467A (fr)
TW (1) TW202430654A (fr)
WO (1) WO2024074375A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625127C2 (de) * 1996-06-12 1998-04-30 Voest Alpine Ind Anlagen Vorrichtung und Verfahren zur Erzeugung von Eisenschwamm
AT407400B (de) * 1998-10-07 2001-02-26 Voest Alpine Ind Anlagen Verfahren und anlage zum herstellen von eisen, insbesondere stahl
AT410324B (de) * 2001-07-13 2003-03-25 Voest Alpine Industrianlagenba Verfahren und anlage zur metallerzeugung, vorzugsweise zur stahlerzeugung, aus feinkörnigem metalloxid
EP1662009A1 (fr) 2004-11-26 2006-05-31 VAI Industries (UK) Ltd. Dispositif pour la distribution de matériau à un four
EP2653568A1 (fr) 2012-04-18 2013-10-23 Siemens VAI Metals Technologies GmbH Dispositif et procédé de gazage de surface dans un puits de réacteur à réduction
EP2821509A1 (fr) * 2013-07-01 2015-01-07 Siemens VAI Metals Technologies GmbH Désulfurisation de gaz dans la fabrication de fonte brute
EP3150729A1 (fr) 2015-10-02 2017-04-05 Primetals Technologies Austria GmbH Procede et dispositif de chargement de poutres en fer
EP3239306A1 (fr) * 2016-04-27 2017-11-01 Primetals Technologies Austria GmbH Procédé et appareil de fabrication de produits de fonte brute liquide
DE102020205493A1 (de) * 2020-04-30 2021-11-04 Sms Group Gmbh Verfahren zum Herstellen von flüssigem Roheisen aus einem DRI-Produkt
EP3992309A1 (fr) * 2020-10-30 2022-05-04 Primetals Technologies Austria GmbH Fabrication de fer en fusion

Also Published As

Publication number Publication date
WO2024074375A1 (fr) 2024-04-11
CN119998467A (zh) 2025-05-13
EP4350010A1 (fr) 2024-04-10
KR20250086667A (ko) 2025-06-13
TW202430654A (zh) 2024-08-01
JP2025536139A (ja) 2025-10-31

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