ATE256755T1 - Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken - Google Patents

Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken

Info

Publication number
ATE256755T1
ATE256755T1 AT00970328T AT00970328T ATE256755T1 AT E256755 T1 ATE256755 T1 AT E256755T1 AT 00970328 T AT00970328 T AT 00970328T AT 00970328 T AT00970328 T AT 00970328T AT E256755 T1 ATE256755 T1 AT E256755T1
Authority
AT
Austria
Prior art keywords
slag
carbon
calcium nitrate
foaming
added
Prior art date
Application number
AT00970328T
Other languages
English (en)
Inventor
Petter Tuvnes
Thorvald Abel Engh
Original Assignee
Norsk Hydro As
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 Norsk Hydro As filed Critical Norsk Hydro As
Application granted granted Critical
Publication of ATE256755T1 publication Critical patent/ATE256755T1/de

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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/54—Processes yielding slags of special composition
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
    • 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
    • C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
    • 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
    • C21C5/36—Processes yielding slags of special composition
    • C21C2005/366—Foam slags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
AT00970328T 1999-10-18 2000-10-18 Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken ATE256755T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19995072A NO311226B1 (no) 1999-10-18 1999-10-18 Skumming av slagg
PCT/NO2000/000345 WO2001029271A1 (en) 1999-10-18 2000-10-18 Method and use of calcium nitrate for foaming of steel-making slags

Publications (1)

Publication Number Publication Date
ATE256755T1 true ATE256755T1 (de) 2004-01-15

Family

ID=19903873

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00970328T ATE256755T1 (de) 1999-10-18 2000-10-18 Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken

Country Status (14)

Country Link
EP (1) EP1230404B1 (de)
JP (1) JP2003512523A (de)
KR (1) KR20020042721A (de)
CN (1) CN1206373C (de)
AT (1) ATE256755T1 (de)
AU (1) AU7972700A (de)
BR (1) BR0014781A (de)
CA (1) CA2387597A1 (de)
DE (1) DE60007355T2 (de)
ES (1) ES2213049T3 (de)
NO (1) NO311226B1 (de)
RU (1) RU2241046C2 (de)
WO (1) WO2001029271A1 (de)
ZA (1) ZA200202602B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050478A1 (de) 2007-10-23 2009-04-30 Sms Demag Ag Verfahren zur Rostfreistahlerzeugung mit Direktreduktionsöfen für Ferrochrom und Ferronickel auf der Primärseite eines Konverters
DE102010004983A1 (de) 2010-01-19 2011-07-21 SMS Siemag Aktiengesellschaft, 40237 Verfahren zur Schaumschlackenerzeugung einer Rostfreischmelze in einem Konverter
KR101295067B1 (ko) * 2011-09-05 2013-08-08 주식회사 포스코 저강도 강지금 제조방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB764213A (en) * 1954-01-14 1956-12-19 Electro Chimie Metal Improvements in or relating to the desulphurisation and desiliconising of pig iron
US4528035A (en) * 1984-05-21 1985-07-09 Metro Materials Corporation Composition and process to create foaming slag cover for molten steel
SU1379317A1 (ru) * 1986-07-09 1988-03-07 Орско-Халиловский металлургический комбинат Состав дл вспенивани шлака в дуговой печи
FR2634787B1 (fr) * 1988-08-01 1991-11-29 Siderurgie Fse Inst Rech Procede d'obtention d'un laitier moussant dans un four electrique d'acierie
RU2075514C1 (ru) * 1991-04-30 1997-03-20 Акционерное общество закрытого типа "Интермет-Сервис и К" Способ выплавки стали в дуговой электропечи
EP0655508B1 (de) * 1993-11-30 1998-08-19 ACCIAI SPECIALI TERNI S.p.a. Verfahren unter Verwendung von Schaumschlacke bei der Herstellung von rostfreiem Stahl im Elektro-lichtbogenofen
JPH0841521A (ja) * 1994-08-02 1996-02-13 Nippon Steel Corp 取鍋スラグ除去方法
FR2753205B1 (fr) * 1996-09-12 1998-12-04 Usinor Sacilor Procede pour realiser un laitier moussant au-dessus d'un acier inoxydable en fusion dans un four electrique

Also Published As

Publication number Publication date
NO995072L (no) 2001-04-19
ZA200202602B (en) 2003-09-23
WO2001029271A1 (en) 2001-04-26
DE60007355T2 (de) 2004-10-07
RU2241046C2 (ru) 2004-11-27
DE60007355D1 (de) 2004-01-29
ES2213049T3 (es) 2004-08-16
KR20020042721A (ko) 2002-06-05
NO311226B1 (no) 2001-10-29
BR0014781A (pt) 2002-06-11
JP2003512523A (ja) 2003-04-02
NO995072D0 (no) 1999-10-18
AU7972700A (en) 2001-04-30
EP1230404A1 (de) 2002-08-14
EP1230404B1 (de) 2003-12-17
CN1379825A (zh) 2002-11-13
CA2387597A1 (en) 2001-04-26
CN1206373C (zh) 2005-06-15

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Legal Events

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties