EP0401530A3 - Process for decarburising chromium containing steel melts with over 10% chromium - Google Patents

Process for decarburising chromium containing steel melts with over 10% chromium Download PDF

Info

Publication number
EP0401530A3
EP0401530A3 EP19900108699 EP90108699A EP0401530A3 EP 0401530 A3 EP0401530 A3 EP 0401530A3 EP 19900108699 EP19900108699 EP 19900108699 EP 90108699 A EP90108699 A EP 90108699A EP 0401530 A3 EP0401530 A3 EP 0401530A3
Authority
EP
European Patent Office
Prior art keywords
chromium
over
containing steel
decarburising
steel melts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19900108699
Other languages
German (de)
French (fr)
Other versions
EP0401530A2 (en
Inventor
Gerhard Dr. Gross
Marian Velikonja
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0401530A2 publication Critical patent/EP0401530A2/en
Publication of EP0401530A3 publication Critical patent/EP0401530A3/en
Withdrawn legal-status Critical Current

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
    • 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
    • C21C7/0685—Decarburising of stainless steel
    • 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
    • C21C5/34—Blowing through the bath

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

Die Entkohlung chromhaltiger Stahlschmelzen mit über 10 % Cr-Gehalt erfolgt im unterbadblasenden Konverter durch Einblasen von Sauerstoff als Prozeßgas sowie Stickstoff und Argon als Behandlungsgas. Es wird ein Verfahren angegeben, bei dem Stickstoff und Argon bis zu Kohlenstoffgehalten von ca. 0,06 % durch CO₂ substituiert werden. The decarburization of chrome-containing steel melts with over 10% Cr content takes place in the under bath blowing converter by blowing in oxygen as process gas and Nitrogen and argon as treatment gas. It will be a Method specified in which nitrogen and argon up to to carbon contents of approx. 0.06% through CO₂ be substituted.

EP19900108699 1989-06-03 1990-05-09 Process for decarburising chromium containing steel melts with over 10% chromium Withdrawn EP0401530A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3918155A DE3918155A1 (en) 1989-06-03 1989-06-03 METHOD FOR CARBURIZING CHROMIUM-CONTAINED STEEL MELTS MORE THAN 10% CR CONTENT
DE3918155 1989-06-03

Publications (2)

Publication Number Publication Date
EP0401530A2 EP0401530A2 (en) 1990-12-12
EP0401530A3 true EP0401530A3 (en) 1991-03-27

Family

ID=6382010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900108699 Withdrawn EP0401530A3 (en) 1989-06-03 1990-05-09 Process for decarburising chromium containing steel melts with over 10% chromium

Country Status (4)

Country Link
EP (1) EP0401530A3 (en)
JP (1) JPH0324220A (en)
DE (1) DE3918155A1 (en)
ZA (1) ZA904209B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328045C2 (en) * 1993-08-20 2001-02-08 Ald Vacuum Techn Ag Process for decarburizing carbon-containing metal melts
DE102014205572A1 (en) * 2013-11-20 2015-05-21 Sms Siemag Ag CO and CO2 application in a steel and alloy technology
CN113614255A (en) * 2019-02-13 2021-11-05 沙特基础工业全球技术公司 Decarburization of steel with carbon dioxide
CN110257583A (en) * 2019-07-10 2019-09-20 攀钢集团攀枝花钢铁研究院有限公司 The method for reducing TFe content in converter extracting vanadium finishing slag
CN110205437B (en) * 2019-07-10 2021-03-19 攀钢集团攀枝花钢铁研究院有限公司 Method for reducing TFe content in semi-steel steelmaking converter final slag

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0005506A1 (en) * 1978-05-11 1979-11-28 BASF Aktiengesellschaft Method for treating melts of pig iron and steel or steel alloys
DE3204632A1 (en) * 1981-03-03 1982-09-16 Sumitomo Metal Industries, Ltd., Osaka METHOD FOR REFRESHING STEEL WITH A HIGH CHROME CONTENT
EP0228619A1 (en) * 1985-12-10 1987-07-15 Sumitomo Chemical Company, Limited Converter top-bottom blow smelting process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0005506A1 (en) * 1978-05-11 1979-11-28 BASF Aktiengesellschaft Method for treating melts of pig iron and steel or steel alloys
DE3204632A1 (en) * 1981-03-03 1982-09-16 Sumitomo Metal Industries, Ltd., Osaka METHOD FOR REFRESHING STEEL WITH A HIGH CHROME CONTENT
EP0228619A1 (en) * 1985-12-10 1987-07-15 Sumitomo Chemical Company, Limited Converter top-bottom blow smelting process

Also Published As

Publication number Publication date
EP0401530A2 (en) 1990-12-12
DE3918155A1 (en) 1990-12-06
ZA904209B (en) 1991-03-27
JPH0324220A (en) 1991-02-01

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