DE602005015575D1 - FINE OF MELT LIQUID METAL - Google Patents

FINE OF MELT LIQUID METAL

Info

Publication number
DE602005015575D1
DE602005015575D1 DE602005015575T DE602005015575T DE602005015575D1 DE 602005015575 D1 DE602005015575 D1 DE 602005015575D1 DE 602005015575 T DE602005015575 T DE 602005015575T DE 602005015575 T DE602005015575 T DE 602005015575T DE 602005015575 D1 DE602005015575 D1 DE 602005015575D1
Authority
DE
Germany
Prior art keywords
oxygen
primary
molten metal
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.)
Active
Application number
DE602005015575T
Other languages
German (de)
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.)
Linde LLC
Original Assignee
Linde 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
Application filed by Linde Inc filed Critical Linde Inc
Publication of DE602005015575D1 publication Critical patent/DE602005015575D1/en
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
    • C21C5/32—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.
DE602005015575T 2004-05-14 2005-05-12 FINE OF MELT LIQUID METAL Active DE602005015575D1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0410835A GB0410835D0 (en) 2004-05-14 2004-05-14 Refining molten metal
GB0425540A GB0425540D0 (en) 2004-11-19 2004-11-19 Refining molten metal
PCT/GB2005/001857 WO2005111247A2 (en) 2004-05-14 2005-05-12 Refining molten metal

Publications (1)

Publication Number Publication Date
DE602005015575D1 true DE602005015575D1 (en) 2009-09-03

Family

ID=35115962

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602005015575T Active DE602005015575D1 (en) 2004-05-14 2005-05-12 FINE OF MELT LIQUID 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
WO2016205312A1 (en) * 2015-06-17 2016-12-22 Epps Larry J Coaxial material-stirring lance and method for 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

Family Cites Families (13)

* 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
FR2496699B1 (en) * 1980-12-22 1985-06-21 Siderurgie Fse Inst Rech BLOWING NOZZLE FOR OXIDIZING GAS, ESPECIALLY OXYGEN, FOR THE TREATMENT OF FUSED METALS
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.
JPH01219116A (en) * 1988-02-26 1989-09-01 Sumitomo Metal Ind Ltd Converter refining method of improved secondary combustion ratio
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
JP3655659B2 (en) * 1995-03-03 2005-06-02 新日本製鐵株式会社 Blow acid sending method on converter with good yield
US5865876A (en) * 1995-06-07 1999-02-02 Ltv Steel Company, Inc. Multipurpose lance
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
US5814125A (en) * 1997-03-18 1998-09-29 Praxair Technology, Inc. Method for introducing gas into a liquid
US6125133A (en) * 1997-03-18 2000-09-26 Praxair, Inc. Lance/burner for molten metal furnace
US6432163B1 (en) * 2001-06-22 2002-08-13 Praxair Technology, Inc. Metal refining method using differing refining oxygen sequence
US6932854B2 (en) * 2004-01-23 2005-08-23 Praxair Technology, Inc. Method for producing low carbon steel

Also Published As

Publication number Publication date
KR20070012478A (en) 2007-01-25
BRPI0510988A (en) 2007-12-04
EP1749109A2 (en) 2007-02-07
WO2005111247A3 (en) 2006-04-13
US20090229416A1 (en) 2009-09-17
EP1749109B1 (en) 2009-07-22
ATE437245T1 (en) 2009-08-15
WO2005111247A2 (en) 2005-11-24
JP2007537355A (en) 2007-12-20

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