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EP1764421A3 - Device for decarbonising a steel melt - Google Patents

Device for decarbonising a steel melt Download PDF

Info

Publication number
EP1764421A3
EP1764421A3 EP06020935A EP06020935A EP1764421A3 EP 1764421 A3 EP1764421 A3 EP 1764421A3 EP 06020935 A EP06020935 A EP 06020935A EP 06020935 A EP06020935 A EP 06020935A EP 1764421 A3 EP1764421 A3 EP 1764421A3
Authority
EP
European Patent Office
Prior art keywords
molten steel
gas
decarbonising
steel melt
decarburization
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Withdrawn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
EP06020935A
Other languages
German (de)
French (fr)
Other versions
EP1764421A2 (en
Inventor
Johannes Dr. Mueller
Johannes Spiess
Yuyou Dr. Zhai
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
Voest Alpine Industrienlagenbau 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 Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP1764421A2 publication Critical patent/EP1764421A2/en
Publication of EP1764421A3 publication Critical patent/EP1764421A3/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Withdrawn legal-status Critical Current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
    • C21C5/005—Manufacture 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
    • C21C5/32—Blowing from above
    • 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
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Processing Of Solid Wastes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

Decarburization of molten steel (3), especially in stainless steel production in a metallurgical vessel (2) and particularly a converter, involves treatment with oxygen and an inert gas if required and especially argon and/or nitrogen. To decarburize molten steel with carbon content of =0.3 wt.%, the gas is introduced through an opening (5) below the molten steel level and a blower lance (6, 7) over the molten steel surface, to bring the gas into contact with the metal.
EP06020935A 2002-08-21 2003-07-15 Device for decarbonising a steel melt Withdrawn EP1764421A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0125002A AT411530B (en) 2002-08-21 2002-08-21 Decarburization of molten stainless steel in a converter involves delivering the treatment gas through an opening below the molten level and blower lances above it, to mix the gas thoroughly through the molten metal
EP03792199A EP1530648B1 (en) 2002-08-21 2003-07-15 Methods and device for decarbonising a steel melt

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP03792199A Division EP1530648B1 (en) 2002-08-21 2003-07-15 Methods and device for decarbonising a steel melt

Publications (2)

Publication Number Publication Date
EP1764421A2 EP1764421A2 (en) 2007-03-21
EP1764421A3 true EP1764421A3 (en) 2007-12-26

Family

ID=3687818

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06020935A Withdrawn EP1764421A3 (en) 2002-08-21 2003-07-15 Device for decarbonising a steel melt
EP03792199A Expired - Lifetime EP1530648B1 (en) 2002-08-21 2003-07-15 Methods and device for decarbonising a steel melt

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03792199A Expired - Lifetime EP1530648B1 (en) 2002-08-21 2003-07-15 Methods and device for decarbonising a steel melt

Country Status (8)

Country Link
EP (2) EP1764421A3 (en)
CN (1) CN100532581C (en)
AT (2) AT411530B (en)
AU (1) AU2003257462A1 (en)
DE (1) DE50307383D1 (en)
ES (1) ES2287557T3 (en)
RU (1) RU2319750C2 (en)
WO (1) WO2004018714A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009049896A1 (en) * 2009-01-22 2010-08-05 Sms Siemag Ag Pulse flushing with inert gas in the BOF and AOD converter process
DE102014222727A1 (en) * 2014-11-06 2016-05-12 Sms Group Gmbh Method and device for producing a stainless steel
WO2024100435A1 (en) * 2022-11-10 2024-05-16 Arcelormittal Post combustion lance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545786A (en) * 1978-12-26 1985-10-08 Sumitomo Metal Industries, Ltd. Apparatus for gasifying solid carbonaceous materials
JPH06158142A (en) * 1992-11-24 1994-06-07 Sumitomo Metal Ind Ltd Vacuum decarburization refining equipment for high chromium steel
US5540753A (en) * 1994-07-27 1996-07-30 Nippon Steel Corporation Method for refining chromium-containing molten steel by decarburization

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT216032B (en) * 1959-02-20 1961-07-10 Arbed Device for blowing a metal bath from above
NL6710354A (en) * 1966-07-27 1968-01-29
JPS6040486B2 (en) * 1979-07-03 1985-09-11 住友金属工業株式会社 steel refining method
JPS6063307A (en) * 1983-09-14 1985-04-11 Kawasaki Steel Corp Converter steel making method of dead soft steel
LU86322A1 (en) * 1986-02-25 1987-09-10 Arbed OXYGEN BLOWING LANCE
SU1504262A1 (en) * 1987-03-24 1989-08-30 Научно-исследовательский институт металлургии Method of melting steel in converter
LU88023A1 (en) * 1991-10-30 1993-05-17 Arbed Blow lance
KR0179394B1 (en) * 1994-06-06 1999-02-18 도자끼 시노부 Decarburization refining of chromium containing molten steel
JP3167888B2 (en) * 1995-07-27 2001-05-21 川崎製鉄株式会社 Decarburization refining method of chromium-containing molten steel and upper blowing lance for refining gas
RU2068001C1 (en) * 1995-09-29 1996-10-20 Александр Леонидович Кузьмин Method and oxygen lance for metals smelt blowing
RU2185447C2 (en) * 2000-07-03 2002-07-20 Открытое акционерное общество "Северсталь" Method of blowing metal of converter and tuyere for method embodiment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545786A (en) * 1978-12-26 1985-10-08 Sumitomo Metal Industries, Ltd. Apparatus for gasifying solid carbonaceous materials
JPH06158142A (en) * 1992-11-24 1994-06-07 Sumitomo Metal Ind Ltd Vacuum decarburization refining equipment for high chromium steel
US5540753A (en) * 1994-07-27 1996-07-30 Nippon Steel Corporation Method for refining chromium-containing molten steel by decarburization

Also Published As

Publication number Publication date
DE50307383D1 (en) 2007-07-12
ES2287557T3 (en) 2007-12-16
EP1530648B1 (en) 2007-05-30
ATA12502002A (en) 2003-07-15
ATE363546T1 (en) 2007-06-15
EP1530648A1 (en) 2005-05-18
CN100532581C (en) 2009-08-26
CN1675383A (en) 2005-09-28
AT411530B (en) 2004-02-25
WO2004018714A1 (en) 2004-03-04
AU2003257462A1 (en) 2004-03-11
RU2319750C2 (en) 2008-03-20
EP1764421A2 (en) 2007-03-21
RU2005107698A (en) 2005-09-10

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