EP2986743A1 - Procédé et installation pour la production de ferro-alliages présentant une teneur réduite en carbone dans un convertisseur à vide - Google Patents

Procédé et installation pour la production de ferro-alliages présentant une teneur réduite en carbone dans un convertisseur à vide

Info

Publication number
EP2986743A1
EP2986743A1 EP14724289.5A EP14724289A EP2986743A1 EP 2986743 A1 EP2986743 A1 EP 2986743A1 EP 14724289 A EP14724289 A EP 14724289A EP 2986743 A1 EP2986743 A1 EP 2986743A1
Authority
EP
European Patent Office
Prior art keywords
converter
vacuum
nozzles
injected
oxygen
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.)
Granted
Application number
EP14724289.5A
Other languages
German (de)
English (en)
Other versions
EP2986743B1 (fr
Inventor
Johann Reichel
Lutz Rose
Jan Bader
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.)
SMS Group GmbH
Original Assignee
SMS Group 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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP2986743A1 publication Critical patent/EP2986743A1/fr
Application granted granted Critical
Publication of EP2986743B1 publication Critical patent/EP2986743B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Definitions

  • the vacuum converter is equipped with a valve station that allows mixing of the process and inert gases used for the top lance and bottom bath nozzles.
  • the gases are mixed as follows, especially in the case of the underbath nozzles on the process and inert gas sides

Abstract

L'invention concerne un procédé de production de ferro-alliages, en particulier d'alliages de FeCr et de FeMn présentant une faible teneur en carbone dans un convertisseur à vide. Selon l'invention, dans le convertisseur à vide, lors de la première étape, la désilisation et la décarburation principale de la masse fondue sont réalisées sur la base du procédé à convertisseur dans des conditions atmosphériques, de l'oxygène et du CO2 étant insufflés dans la masse fondue par une lance supérieure et par les buses au-dessous de la masse fondue, en particulier des buses à fente annulaire; et ensuite, dans le même convertisseur, lors d'une deuxième étape, la phase de décarburation profonde est réalisée sous vide, du CO2 ou du CmH2m+2 étant injecté du côté du gaz protecteur des buses au-dessous de la masse fondue.
EP14724289.5A 2013-04-15 2014-03-25 Procédé pour la production de ferro-alliages présentant une teneur réduite en carbone dans un convertisseur à vide Active EP2986743B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013006986 2013-04-15
DE201310014856 DE102013014856A1 (de) 2013-04-15 2013-09-02 Verfahren und Anlage zur Herstellung von Ferrolegierungen mit niedrigem Kohlenstoffgehalt in einem Vakuum-Konverter
PCT/DE2014/000164 WO2014169888A1 (fr) 2013-04-15 2014-03-25 Procédé et installation pour la production de ferro-alliages présentant une teneur réduite en carbone dans un convertisseur à vide

Publications (2)

Publication Number Publication Date
EP2986743A1 true EP2986743A1 (fr) 2016-02-24
EP2986743B1 EP2986743B1 (fr) 2017-02-01

Family

ID=51618168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14724289.5A Active EP2986743B1 (fr) 2013-04-15 2014-03-25 Procédé pour la production de ferro-alliages présentant une teneur réduite en carbone dans un convertisseur à vide

Country Status (3)

Country Link
EP (1) EP2986743B1 (fr)
DE (1) DE102013014856A1 (fr)
WO (1) WO2014169888A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111424136A (zh) * 2019-01-10 2020-07-17 宝山钢铁股份有限公司 一种rh柔性自补偿密封通道及其柔性补偿方法
EP4056720A1 (fr) 2021-03-08 2022-09-14 SMS Group GmbH Procédé de fabrication d'un ferro-alliage à faible taux de carbone
EP4056721A1 (fr) 2021-03-08 2022-09-14 SMS Group GmbH Procédé de fabrication d'un ferro-alliage à faible taux de carbone
DE102021214218A1 (de) 2021-03-08 2022-09-08 Sms Group Gmbh Verfahren zum Herstellen einer Ferrolegierung mit niedrigem Kohlenstoffgehalt
DE102021214220A1 (de) 2021-03-08 2022-09-08 Sms Group Gmbh Verfahren zum Herstellen einer Ferrolegierung mit niedrigem Kohlenstoffgehalt

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2123212A1 (en) * 1971-01-29 1972-09-08 Creusot Loire Refinement and alloying of steel - in one furnace as one sequence of operations esp for stainless steel
DE4401244C2 (de) * 1994-01-18 2002-11-07 Ald Vacuum Techn Ag Verfahren zur Entkohlung von Stahlschmelzen
JP3531218B2 (ja) * 1994-06-20 2004-05-24 大同特殊鋼株式会社 低炭素含クロム鋼の製造方法
TW564262B (en) * 2001-09-20 2003-12-01 Nippon Steel Corp A method and apparatus for refining Cr containing melt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014169888A1 *

Also Published As

Publication number Publication date
EP2986743B1 (fr) 2017-02-01
WO2014169888A1 (fr) 2014-10-23
DE102013014856A1 (de) 2014-10-16

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