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WO2005111247A3 - Refining molten metal - Google Patents

Refining molten metal Download PDF

Info

Publication number
WO2005111247A3
WO2005111247A3 PCT/GB2005/001857 GB2005001857W WO2005111247A3 WO 2005111247 A3 WO2005111247 A3 WO 2005111247A3 GB 2005001857 W GB2005001857 W GB 2005001857W WO 2005111247 A3 WO2005111247 A3 WO 2005111247A3
Authority
WO
WIPO (PCT)
Prior art keywords
oxygen
molten metal
primary
lance
jet
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.)
Ceased
Application number
PCT/GB2005/001857
Other languages
French (fr)
Other versions
WO2005111247A2 (en
Inventor
Andrew Miller Cameron
Andrew Peter Richardson
John Kelvin Batham
Mark A Wilkinson
Michael James Strelbisky
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 LLC
Original Assignee
BOC Group Inc
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
Priority claimed from GB0410835A external-priority patent/GB0410835D0/en
Priority claimed from GB0425540A external-priority patent/GB0425540D0/en
Priority to DE602005015575T priority Critical patent/DE602005015575D1/en
Application filed by BOC Group Inc filed Critical BOC Group Inc
Priority to JP2007512347A priority patent/JP2007537355A/en
Priority to AT05744383T priority patent/ATE437245T1/en
Priority to EP05744383A priority patent/EP1749109B1/en
Priority to BRPI0510988-4A priority patent/BRPI0510988A/en
Priority to US11/596,500 priority patent/US20090229416A1/en
Publication of WO2005111247A2 publication Critical patent/WO2005111247A2/en
Publication of WO2005111247A3 publication Critical patent/WO2005111247A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • 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

Landscapes

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

Abstract

A method of refining molten metal in a vessel by the reaction of oxygen with impurities in the molten metal comprises the steps of: a) ejecting at least one primary jet of oxygen from a lance positioned above the molten metal into the molten metal to react with impurities therein and to form a layer of molten slag; b) continuing to eject the primary jet of oxygen from the lance and thereby causing the primary bet of oxygen to pass through the slag layer into the molten metal; c) ejecting a plurality of secondary jets of oxygen from the lance, the secondary jet of oxygen travelling for a distance separately from the primary jet of oxygen; and d) entraining the secondary jets of oxygen into the primary jet of oxygen upstream of the entry of the primary jet of oxygen into the molten metal. A lance head for use in the method has at least one primary oxygen port and a plurality of secondary oxygen ports, the axis of the second oxygen port diverging in the direction of flow from the primary oxygen port at an angle of up to 45°. The method and lance head are particularly of use in the Basic Oxygen Steelmaking (BOS) process. If desired, a stirring gas such as argon may be mixed with the primary oxygen.
PCT/GB2005/001857 2004-05-14 2005-05-12 Refining molten metal Ceased WO2005111247A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US11/596,500 US20090229416A1 (en) 2004-05-14 2005-05-12 Refining Molten Metal
BRPI0510988-4A BRPI0510988A (en) 2004-05-14 2005-05-12 melting metal refining
DE602005015575T DE602005015575D1 (en) 2004-05-14 2005-05-12 FINE OF MELT LIQUID METAL
JP2007512347A JP2007537355A (en) 2004-05-14 2005-05-12 Molten metal refining
AT05744383T ATE437245T1 (en) 2004-05-14 2005-05-12 FINISHING OF MELTED METAL
EP05744383A EP1749109B1 (en) 2004-05-14 2005-05-12 Refining molten metal

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0410835.3 2004-05-14
GB0410835A GB0410835D0 (en) 2004-05-14 2004-05-14 Refining molten metal
GB0425540.2 2004-11-19
GB0425540A GB0425540D0 (en) 2004-11-19 2004-11-19 Refining molten metal

Publications (2)

Publication Number Publication Date
WO2005111247A2 WO2005111247A2 (en) 2005-11-24
WO2005111247A3 true WO2005111247A3 (en) 2006-04-13

Family

ID=35115962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/001857 Ceased WO2005111247A2 (en) 2004-05-14 2005-05-12 Refining molten metal

Country Status (8)

Country Link
US (1) US20090229416A1 (en)
EP (1) EP1749109B1 (en)
JP (1) JP2007537355A (en)
KR (1) KR20070012478A (en)
AT (1) ATE437245T1 (en)
BR (1) BRPI0510988A (en)
DE (1) DE602005015575D1 (en)
WO (1) WO2005111247A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT506984B1 (en) * 2008-06-17 2010-06-15 Siemens Vai Metals Tech Gmbh OXYGEN BLASLANT WITH PROTECTIVE ELEMENT
US9863013B2 (en) * 2011-02-22 2018-01-09 Linde Aktiengesellschaft Apparatus and method for heating a blast furnace stove
US9151492B2 (en) 2011-02-22 2015-10-06 Linde Aktiengesellschaft Heating apparatus
US10240218B2 (en) 2015-06-17 2019-03-26 Larry J Epps Coaxial material-stirring lance and method of use
US10344343B2 (en) 2016-06-15 2019-07-09 Larry J Epps Multiple chamber material-stirring lance and method
JP6733812B2 (en) * 2017-04-13 2020-08-05 日本製鉄株式会社 Water cooled lance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396182A (en) * 1980-12-22 1983-08-02 Institut De Recherches De La Siderurgi Francaise Lance for blowing an oxydizing gas, especially oxygen, onto a bath of molten metal
JPH01219116A (en) * 1988-02-26 1989-09-01 Sumitomo Metal Ind Ltd Converter refining method of improved secondary combustion ratio
JPH08246017A (en) * 1995-03-03 1996-09-24 Nippon Steel Corp A method of blowing acid over the converter with good yield
EP0756012A1 (en) * 1995-07-27 1997-01-29 Kawasaki Steel Corporation Decarburization refining process for chromium-containing molten metal, and associated top blowing lance
WO1997041270A1 (en) * 1996-05-01 1997-11-06 Ltv Steel Company Multipurpose lance
US6432163B1 (en) * 2001-06-22 2002-08-13 Praxair Technology, Inc. Metal refining method using differing refining oxygen sequence

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730505A (en) * 1970-07-01 1973-05-01 Centro Speriment Metallurg Double delivery lance for refining the steel in the converter processes
NL8104474A (en) * 1981-10-01 1983-05-02 Estel Hoogovens Bv LIQUID COOLED LANCE FOR BLOWING OXYGEN ON A STEEL BATH.
NL8400393A (en) * 1984-02-08 1985-09-02 Hoogovens Groep Bv LIQUID COOLED LANCE FOR BLOWING OXYGEN ON A STEEL BATH.
FI94152C (en) * 1992-06-01 1995-07-25 Outokumpu Eng Contract Methods and apparatus for the oxidation of fuel in powder form with two gases with different oxygen levels
US6125133A (en) * 1997-03-18 2000-09-26 Praxair, Inc. Lance/burner for molten metal furnace
US5814125A (en) * 1997-03-18 1998-09-29 Praxair Technology, Inc. Method for introducing gas into a liquid
US6932854B2 (en) * 2004-01-23 2005-08-23 Praxair Technology, Inc. Method for producing low carbon steel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396182A (en) * 1980-12-22 1983-08-02 Institut De Recherches De La Siderurgi Francaise Lance for blowing an oxydizing gas, especially oxygen, onto a bath of molten metal
JPH01219116A (en) * 1988-02-26 1989-09-01 Sumitomo Metal Ind Ltd Converter refining method of improved secondary combustion ratio
JPH08246017A (en) * 1995-03-03 1996-09-24 Nippon Steel Corp A method of blowing acid over the converter with good yield
EP0756012A1 (en) * 1995-07-27 1997-01-29 Kawasaki Steel Corporation Decarburization refining process for chromium-containing molten metal, and associated top blowing lance
WO1997041270A1 (en) * 1996-05-01 1997-11-06 Ltv Steel Company Multipurpose lance
US6432163B1 (en) * 2001-06-22 2002-08-13 Praxair Technology, Inc. Metal refining method using differing refining oxygen sequence

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 536 (C - 660) 29 November 1989 (1989-11-29) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 01 31 January 1997 (1997-01-31) *

Also Published As

Publication number Publication date
WO2005111247A2 (en) 2005-11-24
ATE437245T1 (en) 2009-08-15
EP1749109A2 (en) 2007-02-07
BRPI0510988A (en) 2007-12-04
DE602005015575D1 (en) 2009-09-03
EP1749109B1 (en) 2009-07-22
KR20070012478A (en) 2007-01-25
JP2007537355A (en) 2007-12-20
US20090229416A1 (en) 2009-09-17

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