DE60007355T2 - Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken - Google Patents

Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken Download PDF

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Publication number
DE60007355T2
DE60007355T2 DE60007355T DE60007355T DE60007355T2 DE 60007355 T2 DE60007355 T2 DE 60007355T2 DE 60007355 T DE60007355 T DE 60007355T DE 60007355 T DE60007355 T DE 60007355T DE 60007355 T2 DE60007355 T2 DE 60007355T2
Authority
DE
Germany
Prior art keywords
carbon
slag
calcium nitrate
foaming
added
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.)
Expired - Fee Related
Application number
DE60007355T
Other languages
English (en)
Other versions
DE60007355D1 (de
Inventor
Petter Tuvnes
Abel Engh
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.)
Yara International ASA
Original Assignee
Norsk Hydro ASA
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 ASA filed Critical Norsk Hydro ASA
Publication of DE60007355D1 publication Critical patent/DE60007355D1/de
Application granted granted Critical
Publication of DE60007355T2 publication Critical patent/DE60007355T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C21C5/52—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)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
DE60007355T 1999-10-18 2000-10-18 Verfahren und gebrauch von kalziumnitraten zum aufschäumen von stahlschlacken Expired - Fee Related DE60007355T2 (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 (2)

Publication Number Publication Date
DE60007355D1 DE60007355D1 (de) 2004-01-29
DE60007355T2 true DE60007355T2 (de) 2004-10-07

Family

ID=19903873

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60007355T Expired - Fee Related DE60007355T2 (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
RU2241046C2 (ru) 2004-11-27
WO2001029271A1 (en) 2001-04-26
NO995072L (no) 2001-04-19
JP2003512523A (ja) 2003-04-02
ATE256755T1 (de) 2004-01-15
EP1230404A1 (de) 2002-08-14
NO995072D0 (no) 1999-10-18
CN1206373C (zh) 2005-06-15
CN1379825A (zh) 2002-11-13
NO311226B1 (no) 2001-10-29
EP1230404B1 (de) 2003-12-17
DE60007355D1 (de) 2004-01-29
KR20020042721A (ko) 2002-06-05
ZA200202602B (en) 2003-09-23
AU7972700A (en) 2001-04-30
ES2213049T3 (es) 2004-08-16
CA2387597A1 (en) 2001-04-26
BR0014781A (pt) 2002-06-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: YARA INTERNATIONAL ASA, OSLO, NO

8339 Ceased/non-payment of the annual fee