EP4058607A1 - Production d'acier brut à partir d'une matière fondue - Google Patents

Production d'acier brut à partir d'une matière fondue

Info

Publication number
EP4058607A1
EP4058607A1 EP20801325.0A EP20801325A EP4058607A1 EP 4058607 A1 EP4058607 A1 EP 4058607A1 EP 20801325 A EP20801325 A EP 20801325A EP 4058607 A1 EP4058607 A1 EP 4058607A1
Authority
EP
European Patent Office
Prior art keywords
pig iron
liquid
iron
furnace
solid
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
EP20801325.0A
Other languages
German (de)
English (en)
Inventor
Jens Apfel
Jens Kluge
Peter Oertelt
Steffen Wiedner
Jennifer Anne ALEXANDER
Michiel VAN DER WEES
Roland Jan Snijders
Sander Martijn WILLEMSEN
Patricia Rodriguez ABELEDO
Robert STEMMER
Elisabeth Maria Beunder
Arent Willem OVERBOSCH
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
Tata Steel Ijmuiden BV
Original Assignee
Primetals Technologies Austria GmbH
Tata Steel Ijmuiden BV
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, Tata Steel Ijmuiden BV filed Critical Primetals Technologies Austria GmbH
Publication of EP4058607A1 publication Critical patent/EP4058607A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/562—Manufacture of steel by other methods starting from scrap
    • 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
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a method for producing a feed melt for converter treatment and a method for producing liquid crude steel using such a feed melt and a crude steel production plant.
  • the work step of charging scrap into a converter vessel takes time and also extends the necessary cycle time.
  • the amount of heat introduced by the liquid pig iron as sensible heat and as chemical heat must primarily provide the required energy.
  • liquid pig iron and solid scrap In order to avoid temperatures that are too high or too low during the converter treatment, there is limited scope for the conventional methods usable amounts of liquid pig iron and solid scrap.
  • the liquid pig iron is produced in conventional processes by means of blast furnace routes or smelting reduction plants from oxidic iron carriers using carbon as a reducing agent, which results in considerable CO 2 emissions.
  • a minimum amount of liquid pig iron therefore also means a minimum amount of C02 emissions for such a way of producing the liquid crude steel.
  • scrap-based crude steel production for example in an electric arc furnace
  • such production of liquid crude steel with pig iron from the blast furnace route or smelting reduction plants is significantly more polluted with C02 emissions. With regard to the requirements associated with C02 emissions, this increases the costs of production and reduces profitability.
  • Converter treatment characterized in that by combining liquid pig iron from a blast furnace and / or a smelting reduction plant with at least one of the components from the group consisting of
  • - Liquid pig iron is produced from a Submerged Are Furnace (SAF), a premelt.
  • SAF Submerged Are Furnace
  • the feed melt is a melt that is fed into a converter vessel in order to be subjected there to a process for the production of crude steel - here called converter treatment.
  • a converter vessel is to be understood as any type of metallurgical treatment vessel for converting feed melt to crude steel, for example steel works converters such as LD converters, OBM converters, KMS converters.
  • a smelting reduction plant is, for example, a COREX plant or a FINEX plant.
  • Converter treatment does not take place in the converter vessel in which the converter treatment is carried out; it takes place in a vessel different from the converter vessel in which the converter treatment is carried out.
  • the production of the feed melt for a converter treatment thus takes place in a different vessel or at a different location than the converter treatment itself; it is therefore carried out separately from the converter treatment. Only after hers
  • the feed melt is fed into the converter vessel in which the converter treatment is carried out.
  • a premelt is first produced in order to produce a feed melt for a converter treatment.
  • liquid pig iron from a blast furnace and / or a smelting reduction plant is used with at least one of the components from the group consisting of
  • solid pig iron or solid sponge iron from an induction furnace, it applies that the solid pig iron or the solid sponge iron in the induction furnace is heated to the ambient temperature, and the respective components in the heated state serve as components in the combination for the production of the premelt.
  • liquid pig iron from a blast furnace and / or a smelting reduction system - if necessary after treatment steps - essentially corresponds to the feed melt introduced into the converter vessel.
  • the production of the feed melt is accordingly burdened with high direct C02 emissions.
  • a feed melt according to the invention differs from liquid pig iron from a blast furnace and / or smelting reduction plant, since such liquid pig iron according to the invention has at least one of the components mentioned is combined to produce the so-called premelt.
  • an amount of feed melt produced using the premelt for the converter treatment or the crude steel obtained from it is also contaminated with fewer C02 emissions.
  • a premelt according to the invention in the production of the feed melt for the converter treatment, despite further use of liquid pig iron from possibly already existing blast furnaces and / or smelting reduction systems, it is possible to reduce the direct C02 emissions in the production of crude steel.
  • the arc furnace is, for example, an AC type, a DC type, an RP type, an HP type, a UHP type.
  • the converter treatment is used to produce liquid crude steel;
  • the crude steel is preferably a carbon steel, not a stainless steel.
  • the premelt is already the feed melt for the converter treatment; no further treatment measures are carried out on the premelt before it is fed into a converter, which change their composition and / or temperature after the combination.
  • the feed melt for the converter treatment is thereby used obtained that the premelt is subjected to at least one treatment measure; one or more further treatment measures are carried out on the premelt before it is fed into a converter, which change their composition and / or temperature after the combination.
  • the treatment measure includes desulfurization.
  • the components or the liquid pig iron can contain different amounts of accompanying elements such as sulfur, phosphorus, silicon, vanadium. These accompanying elements are introduced into the premelt when they are combined.
  • sulfur can be introduced into the premelt especially via the liquid pig iron from a blast furnace and / or a smelting reduction plant.
  • liquid pig iron from a blast furnace and / or a smelting reduction plant.
  • the lowest possible sulfur content is generally aimed for.
  • Other treatment measures such as dephosphorization, devanadization, desilicon removal or combinations of several treatment measures can also be carried out.
  • liquid crude steel from an electric arc furnace is based on solid scrap, or on a mixture of solid scrap with at least one component from the group consisting of
  • Emissions from the production of the liquid crude steel from an electric arc furnace may not be fully included as direct C02 emissions.
  • the CO2 balance is also more favorable than the CO2 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant.
  • the C02 balance of the liquid crude steel from an electric arc furnace is also favorably influenced when using sponge iron.
  • Liquid crude steel from an induction furnace is based, for example, on solid scrap or on a mixture of solid scrap with at least one component from the group consisting of
  • the C02 balance of the liquid crude steel from an induction furnace is possibly more favorable than the C02 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant, since the C02 emissions that occurred during the production of the raw material for the scrap in the production of the liquid crude steel from an induction furnace may not be fully included as direct C02 emissions.
  • the CO2 balance is also more favorable than the CO2 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant.
  • the C02 balance of the liquid crude steel from an induction furnace is also favorably influenced when using sponge iron.
  • Liquid pig iron from an electric arc furnace is based, for example, on solid sponge iron or on a mixture of solid sponge iron with at least one component from the group consisting of
  • the CO2 balance is more favorable than the CO2 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant. Accordingly, the C02 balance of liquid pig iron from a Electric arc furnace favorably influenced when using sponge iron.
  • the C02 balance of liquid pig iron from an electric arc furnace is possibly more favorable than the C02 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant, since the C02 emissions that occur during the production of the raw material for the scrap contribute the production of the liquid pig iron in the electric arc furnace may not be fully included as direct C02 emissions.
  • Liquid pig iron from an induction furnace is based, for example, on solid sponge iron or on a mixture of solid sponge iron with at least one component from the group consisting of
  • the CO2 balance is more favorable than the CO2 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant. Accordingly, the C02 balance of liquid pig iron from an induction furnace is favorably influenced when using sponge iron.
  • the C02 balance of liquid pig iron from an induction furnace is possibly more favorable than the C02 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant, since the C02 emissions that occur during the production of the starting material for the scrap contribute the manufacture of the liquid pig iron in the induction furnace may not be fully included as direct C02 emissions.
  • Liquid pig iron from a Submerged Are Furnace is based, for example, on solid sponge iron or on a mixture of solid sponge iron with at least one component from the group consisting of
  • an SAF can also be designed as an Open Slag Bath Furnace OSBF.
  • the CO2 balance is more favorable than the CO2 balance of liquid pig iron from a blast furnace and / or a smelting reduction plant.
  • the C02 balance of liquid pig iron from an SAF is favorably influenced when using sponge iron.
  • any quantity ratio of liquid pig iron from a blast furnace and / or a smelting reduction plant and the components used is possible when combined for premelting.
  • the quantitative ratios in the combination for the production of the premelt are selected as a function of the energy balance of the converter treatment to which the feed melt is to be subjected.
  • the proportions of liquid pig iron and components can be set.
  • the quantitative ratio of the different types can also be used can be adjusted to each other.
  • the quantitative ratio of the different types - for example in the sense of analyzes which also include the temperature - can be set to one another. If different components are used, the ratio of the various components to one another can also be adjusted.
  • the energy balance of the converter treatment depends, for example, on what type of crude steel - for example in terms of analyzes, which also the
  • Include temperature - is to be produced, and which additions to the converter or which reactions are necessary in order to achieve the goal based on the feed melt.
  • the additions or the reactions can have a cooling or heating effect.
  • Another subject matter of the present application is a process for the production of liquid crude steel by converter treatment, characterized in that a feed melt produced according to the invention is introduced into a converter vessel and there combined with further components for the production of liquid crude steel.
  • the production of the feed melt for a converter treatment does not take place in the converter vessel in which the converter treatment is carried out; it takes place in a vessel different from the converter vessel in which the converter treatment is carried out.
  • the production of the feed melt for a converter treatment thus takes place in a different vessel or at a different location than the converter treatment; it is therefore carried out separately from the converter treatment. Only after it has been produced is the feed melt added to the converter vessel in which the converter treatment is carried out.
  • the crude steel is preferably a carbon steel, not a stainless steel.
  • the union can take place before and / or during the treatment steps of the converter treatment. Treatment steps that can be used in the converter treatment for the production of crude steel from an insert melt are known to the person skilled in the art and are therefore not described in detail here.
  • Quantity ratios in the combination for the production of the premelt depending on the energy balance of the converter treatment apply, inter alia, the following aspects.
  • the feed melt produced according to the invention can have a higher temperature than conventional pig iron from a Process for the production of liquid crude steel using a blast furnace and / or a smelting reduction plant.
  • the additional advantage that, for example, those fed into the converter vessel as a whole - from the beginning of the manufacture of the premelt to the end of the converter treatment
  • Scrap amount can be increased. A higher proportion of scrap in the manufacture of the crude steel in turn leads to lower C02 emissions that are directly attributable to the crude steel.
  • the feed melt produced according to the invention has in
  • a reduced bubble time also results in a higher output because less iron oxide is produced and passes into the slag.
  • scrap can be transferred earlier in the method according to the invention for raw steel production, namely during the production of the premelt or the feed melt in the Proceedings are introduced. Providing the required amount of scrap is therefore less time-consuming, since no or less scrap has to be charged into the converter vessel. This saves time when handling the converter and thus increases productivity.
  • the procedure according to the invention also provides greater flexibility with regard to economically sensible input materials and operational modes of operation compared to a conventional procedure.
  • the procedure according to the invention makes it possible to avoid such problems because in existing steelworks it allows the existing production chain with its logistical requirements to be served with possibly manageable additional investments while continuing to use the existing facilities.
  • a heating means preferably ferrosilicon.
  • a coolant for example comprising scrap, iron ore, pig iron, iron pellets, lime, DRI.
  • Another object of the present application is a crude steel production plant for carrying out the method according to the invention, characterized in that it comprises
  • One or more pig iron feeds can be present.
  • One or more component feeds can be present.
  • One or more converter vessels can be present Converter vessels.
  • the pig iron supply is suitable for supplying liquid pig iron from a blast furnace and / or a
  • Smelting reduction plant It is, for example, a torpedo car or an open transport ladle.
  • the component supply is suitable for supplying at least one of the components from the group consisting of
  • the component supply advantageously comprises at least one member from the group consisting of - electric arc furnace,
  • the mixing device is suitable for receiving liquid pig iron from the pig iron supply or components from the component supply.
  • the mixing device comprises, for example, a pig iron mixing vessel and / or a raw steel mixing vessel and / or a vessel for producing the premelt by combining liquid pig iron and components in the vessel in question.
  • the mixing device can also comprise a plurality of said vessels.
  • the crude steel production plant also comprises a treatment device that is used to receive premelt and dispense
  • Insert melt is suitable.
  • the treatment device can comprise several treatment units for carrying out different treatment steps.
  • the vessel in which the premelt is produced for example a charging ladle - or an optionally present separate transfer vessel which is used for the transfer of premelt from the place of its production to the Serving converter vessel can serve as part of the treatment device.
  • the mixing device for combining pig iron and components is part of the pig iron supply or part of the component supply.
  • components can be inputted into a torpedo wagon leading to molten pig iron, so that the torpedo wagon, which serves as the pig iron feed, also serves as a mixing device.
  • the mixing device comprises the vessel in which the premelt or, if appropriate, the insert melt is produced.
  • the mixing device does not correspond to the converter vessel in which the converter treatment is carried out for the purpose of crude steel production.
  • the production of the premelt or the feed melt takes place in a vessel different from the converter vessel in which the converter treatment is carried out.
  • Feed melt for a converter treatment thus takes place in a different vessel or at a different location than the converter treatment; it is therefore carried out separately from the converter treatment. Only after it has been produced is the feed melt added to the converter vessel in which the converter treatment is carried out.
  • FIG. 1 shows a conventional method for producing liquid crude steel with pig iron.
  • FIG. 2 shows an embodiment of a method according to the invention for producing a premelt and an insert melt as well as producing crude steel.
  • FIG. 3 shows a further embodiment of a method according to the invention for producing a premelt and an insert melt as well as producing crude steel.
  • FIGS. 4a, 4b, 4c show various options for producing a premelt.
  • FIGS. 5a, 5b, 5c show further options for producing a premelt.
  • Figure 1 outlines a conventional process for the production of liquid crude steel with pig iron from the blast furnace route or smelting reduction plant.
  • Liquid pig iron 1 is entered into the LD converters 2a, 2b, in which converter treatment for the production of crude steel takes place.
  • the liquid pig iron 1 is taken, for example, from a torpedo wagon 3 and subjected to desulfurization before being fed into the LD converters 2a, 2b, represented by a schematically illustrated desulfurization system 4.
  • the representation of the addition of solid scrap also taking place in the LD converter 2a , 2b has been omitted for reasons of clarity.
  • FIG. 2 shows, in a similar representation, a method according to the invention for producing a premelt and an insert melt as well as producing crude steel.
  • the premelt 9 produced by the association is subjected to desulfurization, represented by a desulfurization plant 10.
  • the resulting insert melt is fed into the LD converters 11a, 11b, in which the converter treatment for the production of crude steel takes place - indicated by the blowing lances 12a, 12b.
  • FIG. 3 shows, in a representation largely analogous to FIG. 2, an embodiment in which liquid pig iron 5 'from a torpedo wagon 6' and liquid pig iron 7 'from an electric arc furnace 8' - made from DRI, which is shown schematically as circles - are combined.
  • the premelt 9 'produced by the union is fed into the LD converters 11a', 11b 'as feed melt, in which the converter treatment for the production of crude steel takes place - indicated by the blowing lances 12a', 12b '.
  • FIGS. 4a, 4b, 4c Examples of various options for producing the premelt are outlined in FIGS. 4a, 4b, 4c.
  • FIG. 4a shows a pig iron supply 13 with a torpedo cart and a charging ladle 14. Liquid pig iron is introduced from the torpedo cart into the charging ladle 14 - indicated by an arrow. The charging pan 14 partially filled with the liquid pig iron is then fed to a component feed 15, shown here as
  • Electric arc furnace transported - indicated by a block arrow - where liquid crude steel is added - indicated by a curved arrow.
  • FIG. 4b shows a component feed 16 with an electric arc furnace and a charging ladle 17.
  • Liquid crude steel is fed from the electric arc furnace into the charging ladle 17 - indicated by a curved arrow.
  • Charging ladle 17 is then transported to a pig iron supply 18, shown here as a torpedo car, where liquid pig iron is added - indicated by a Arrow.
  • premelt is produced in the charging ladles 14, 17 by combining pig iron and the raw steel component from an electric arc furnace.
  • the charging pans 14, 17 serve as a mixing device for combining pig iron and components.
  • the mixing device charging ladle 14 is part of the pig iron supply 13 in FIG. 4a.
  • the mixing device charging ladle 17 is part of the component supply 16 in FIG. 4b.
  • FIG. 4c shows how liquid crude steel from a component feed 19, shown with an electric arc furnace, is poured into a hot metal feed 20 partially filled with liquid pig iron, shown as a torpedo car - indicated by a curved arrow.
  • premelt is produced by combining pig iron and the component raw steel from an electric arc furnace. It serves as a mixing device to combine pig iron and
  • the premelt from the torpedo car is introduced into a transfer vessel 21 for the purpose of transfer to the BOF melt shop, in which the liquid crude steel is produced.
  • the transfer vessel 21 also serves as a treatment unit of a treatment device, in which desulphurization is subsequently carried out before the feed melt obtained from the premelt is fed to a converter vessel - which is not shown separately for the sake of clarity.
  • FIG. 5a shows how liquid pig iron from a
  • Pig iron feed 23 is entered into a mixing vessel 22 - indicated by a curved arrow - into which liquid crude steel from a component feed 24 is also entered - indicated by a curved arrow.
  • the premelt produced in the mixing vessel by combining liquid pig iron and liquid crude steel is entered into a transfer vessel 25 for the purpose of transfer to the BOF meltshop - represented by a dashed arrow.
  • FIG. 5b shows a variant in which liquid crude steel from the electric arc furnace 26 is introduced into a buffer vessel 27 via an intermediate vessel. If necessary, several batches of liquid crude steel from the electric arc furnace 26 are combined in the buffer vessel 27; the buffer vessel 27 is thus a crude steel mixing vessel. From the buffer vessel 27, liquid crude steel from the electric arc furnace 26 is introduced into a mixing vessel 28, into which liquid pig iron 29 from a blast furnace - delivered by the pig iron supply with torpedo cart 30 - is also entered. In the mixing vessel 28, therefore, liquid pig iron 29 and the component liquid raw steel from the electric arc furnace 26 are combined and a premelt is thereby produced.
  • FIG. 1 shows a variant in which liquid crude steel from the electric arc furnace 26 is introduced into a buffer vessel 27 via an intermediate vessel. If necessary, several batches of liquid crude steel from the electric arc furnace 26 are combined in the buffer vessel 27; the buffer vessel 27 is thus a crude steel mixing vessel. From the buffer vessel 27, liquid crude steel from the electric arc furnace 26 is introduced into
  • 5c shows a variant in which liquid pig iron from a blast furnace - delivered by the pig iron supply with torpedo cart 31 - is introduced into a buffer vessel 32 via an intermediate vessel.
  • the buffer vessel 32 if necessary combining several batches of liquid pig iron from a blast furnace; the buffer vessel 32 is thus a pig iron mixing vessel.
  • liquid pig iron from a blast furnace is entered into a mixing vessel 33, in which also liquid crude steel from the
  • Electric arc furnace 34 is entered.
  • the components of liquid crude steel from the electric arc furnace 34 and liquid pig iron are thus combined in the mixing vessel and a premelt is thereby produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)

Abstract

L'invention concerne un procédé de production d'une masse fondue d'alimentation permettant de réaliser un traitement en convertisseur, caractérisé en ce qu'une matière de pré-fonte (9, 9') est produite en combinant du fer brut liquide (5, 5') provenant d'un haut fourneau et/ou d'un système de réduction de fusion avec au moins l'un des composants du groupe constitué par : de l'acier brut liquide (7) provenant d'un four à arc électrique ; de l'acier brut liquide provenant d'un four à induction ; du fer brut liquide (7') provenant d'un four à arc électrique ; du fer brut liquide provenant d'un four à induction ; du fer brut solide provenant d'un four à induction ; du fer spongieux solide provenant d'un four à induction ; du fer brut liquide provenant d'un four à arc submergé (SAF). L'invention concerne en outre un procédé de production d'un acier brut liquide au moyen d'un traitement par convertisseur d'une masse fondue d'alimentation produite de cette manière, par combinaison de ladite masse fondue d'alimentation avec des composants supplémentaires dans une cuve de convertisseur, et un système de production d'acier brut destiné à la mise en œuvre d'un tel procédé, comprenant une alimentation en fer brut, une alimentation en composants, un dispositif de mélange permettant de combiner le fer brut et les composants, et une cuve de convertisseur.
EP20801325.0A 2019-11-13 2020-11-12 Production d'acier brut à partir d'une matière fondue Pending EP4058607A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19208916.7A EP3822371A1 (fr) 2019-11-13 2019-11-13 Fabrication d'acier brut à partir d'une préfusion
PCT/EP2020/081827 WO2021094412A1 (fr) 2019-11-13 2020-11-12 Production d'acier brut à partir d'une matière fondue

Publications (1)

Publication Number Publication Date
EP4058607A1 true EP4058607A1 (fr) 2022-09-21

Family

ID=68581442

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19208916.7A Withdrawn EP3822371A1 (fr) 2019-11-13 2019-11-13 Fabrication d'acier brut à partir d'une préfusion
EP20801325.0A Pending EP4058607A1 (fr) 2019-11-13 2020-11-12 Production d'acier brut à partir d'une matière fondue

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19208916.7A Withdrawn EP3822371A1 (fr) 2019-11-13 2019-11-13 Fabrication d'acier brut à partir d'une préfusion

Country Status (2)

Country Link
EP (2) EP3822371A1 (fr)
WO (1) WO2021094412A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021125784A1 (de) * 2021-10-05 2022-04-21 Thyssenkrupp Steel Europe Ag Verfahren zum Betreiben eines Stahlwerks

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2133571A (en) * 1935-07-24 1938-10-18 H A Brassert & Co Ltd Process for the manufacture of steel from low-grade phosphoruscontaining acid iron ores
DE10227031A1 (de) * 2002-06-17 2004-01-08 Sms Demag Ag Verfahren und Produktionsanlage zum Erzeugen von Produkten aus C-Stahl oder aus Rostfrei-Stahl

Also Published As

Publication number Publication date
WO2021094412A1 (fr) 2021-05-20
EP3822371A1 (fr) 2021-05-19

Similar Documents

Publication Publication Date Title
EP1627084B1 (fr) Procede de recuperation de scories
DE69003124T2 (de) Verfahren zur Herstellung einer Metallschmelze, enthaltend Nickel und Chrom.
EP2207905B1 (fr) Procédé de production d'acier inoxydable avec des fours de réduction directe de ferrochrome et de ferronickel sur le côté primaire d'un convertisseur
DE102007061062B4 (de) Verfahren zum Erzeugen einer bis zu 30% Mangan enthaltenden Stahlschmelze
EP3676409B1 (fr) Procédé de traitement d'une scorie
EP1194597A1 (fr) Procede pour la recuperation de chrome metallique a partir de laitier contenant de l'oxyde de chrome
EP4058607A1 (fr) Production d'acier brut à partir d'une matière fondue
WO2000075385A1 (fr) Procede de conditionnement de scories avec incorporation de residus siderurgiques, et installation correspondante
DE102014215669A1 (de) Verfahren und Produktionsanlage zur Erzeugung von Rostfrei-Stahl
DE3110787A1 (de) Stahl-herstellungsverfahren
WO2004104233A1 (fr) Procede de recuperation d'elements metalliques, notamment de chrome metallique, a partir de laitiers contenant des oxydes metalliques, dans un four a arc electrique
DE102014221397A1 (de) Verfahren und Produktionsanlage zur Erzeugung von Rostfrei-Stahl
AT502312B1 (de) Verfahren zur direkten stahllegierung
EP3018219B1 (fr) Procede de fabrication d'un acier inoxydable
DE69425190T2 (de) Verfahren zur Herstellung von geschmolzenem Stahl aus Kohlenstoffenreichem eisenhaltigen Material
EP3074540B1 (fr) Procédé de traitement de scories de désulfuration
CN108359910A (zh) 一种低碳低硅铝镇静钢复合净化剂合金制作方法
DE19545831C2 (de) Verfahren zum Betreiben einer Doppelgefäß-Lichtbogenofen-Anlage sowie Doppelgefäß-Lichtbogenofen
EP3992309A1 (fr) Fabrication de fer en fusion
DE10215594A1 (de) Verfahren zur Konditionierung von flüssiger Hochofenschlacke
DE3442245A1 (de) Verfahren zur herstellung einer legierung mit hohem chromgehalt durch schmelzreduktion
EP1117844B1 (fr) Procede permettant de produir du fer, notamment de l'acier
DE102016001246A1 (de) Verfahren und Einrichtung zur Entschwefelung einer Eisenschmelze
DE102021133577A1 (de) Verfahren zum Herstellen einer eisenbasierten Schmelze in einem elektrischen Einschmelzer
AT406691B (de) Verfahren zum entsilizieren von roheisen vor einem frischen zu stahl

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220613

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)