BR0014781A - Método de propiciar a expansão de uma escória de produção de aço, e, uso de nitrato de cálcio - Google Patents
Método de propiciar a expansão de uma escória de produção de aço, e, uso de nitrato de cálcioInfo
- Publication number
- BR0014781A BR0014781A BR0014781-8A BR0014781A BR0014781A BR 0014781 A BR0014781 A BR 0014781A BR 0014781 A BR0014781 A BR 0014781A BR 0014781 A BR0014781 A BR 0014781A
- Authority
- BR
- Brazil
- Prior art keywords
- slag
- calcium nitrate
- carbon
- foaming
- added
- Prior art date
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)
Abstract
"MéTODO DE PROPICIAR A EXPANSãO DE UMA ESCóRIA DE PRODUçãO DE AçO, E, USO DE NITRATO DE CáLCIO". A invenção refere-se a um método para a propiciar a expansão de escórias de produção de aço, em que nitrato de cálcio é adicionado à escória isoladamente ou junto com carbono. Nitrato de cálcio e carbono podem ser alimentados à escória através de calhas ou através de lanças com gases de injeção, tais como ar, nitrogênio, dióxido de carbono ou gases inertes. Os componentes sólidos podem ser injetados separadamente com a mesma lança como uma mistura, ou injetados como grânulos pré-fundidos. Para a formação da espuma de escória em caçamba, nitrato de cálcio e carbono são adicionados a partir de acima do banho. é preferido usar uma razão entre nitrato de cálcio e carbono na faixa de 4,11 a 2: 1. Para propiciar a expansão de escória de aço inoxidável, é preferido adicionar FeSi, AI ou Mg antes de nitrato de cálcio, e carbono serem adicionados ou injetados na escória por um gás de injeção. Ar, nitrogênio, dióxido de carbono ou gases inertes podem ser usados como gás de injeção. A invenção também se refere ao uso de nitrato de cálcio como um agente para propiciar a expansão para escórias de produção de aço. A invenção pode ser usada para a propiciar a expansão de escória em caçambas e fornos elétricos a arco.
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 |
---|---|
BR0014781A true BR0014781A (pt) | 2002-06-11 |
Family
ID=19903873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0014781-8A BR0014781A (pt) | 1999-10-18 | 2000-10-18 | Método de propiciar a expansão de uma escória de produção de aço, e, uso de nitrato de cálcio |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP1230404B1 (pt) |
JP (1) | JP2003512523A (pt) |
KR (1) | KR20020042721A (pt) |
CN (1) | CN1206373C (pt) |
AT (1) | ATE256755T1 (pt) |
AU (1) | AU7972700A (pt) |
BR (1) | BR0014781A (pt) |
CA (1) | CA2387597A1 (pt) |
DE (1) | DE60007355T2 (pt) |
ES (1) | ES2213049T3 (pt) |
NO (1) | NO311226B1 (pt) |
RU (1) | RU2241046C2 (pt) |
WO (1) | WO2001029271A1 (pt) |
ZA (1) | ZA200202602B (pt) |
Families Citing this family (3)
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 (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
EP0655508B1 (en) * | 1993-11-30 | 1998-08-19 | ACCIAI SPECIALI TERNI S.p.a. | Process for using foamed slag in stainless steel production in the electric arc furnace |
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 |
-
1999
- 1999-10-18 NO NO19995072A patent/NO311226B1/no unknown
-
2000
- 2000-10-18 DE DE60007355T patent/DE60007355T2/de not_active Expired - Fee Related
- 2000-10-18 ES ES00970328T patent/ES2213049T3/es not_active Expired - Lifetime
- 2000-10-18 RU RU2002113094/02A patent/RU2241046C2/ru not_active IP Right Cessation
- 2000-10-18 CN CNB008145172A patent/CN1206373C/zh not_active Expired - Fee Related
- 2000-10-18 JP JP2001532251A patent/JP2003512523A/ja not_active Abandoned
- 2000-10-18 BR BR0014781-8A patent/BR0014781A/pt not_active IP Right Cessation
- 2000-10-18 AT AT00970328T patent/ATE256755T1/de not_active IP Right Cessation
- 2000-10-18 AU AU79727/00A patent/AU7972700A/en not_active Abandoned
- 2000-10-18 KR KR1020027004859A patent/KR20020042721A/ko not_active Application Discontinuation
- 2000-10-18 CA CA002387597A patent/CA2387597A1/en not_active Abandoned
- 2000-10-18 EP EP00970328A patent/EP1230404B1/en not_active Expired - Lifetime
- 2000-10-18 WO PCT/NO2000/000345 patent/WO2001029271A1/en active IP Right Grant
-
2002
- 2002-04-03 ZA ZA200202602A patent/ZA200202602B/en unknown
Also Published As
Publication number | Publication date |
---|---|
ATE256755T1 (de) | 2004-01-15 |
CN1206373C (zh) | 2005-06-15 |
RU2241046C2 (ru) | 2004-11-27 |
NO311226B1 (no) | 2001-10-29 |
DE60007355D1 (de) | 2004-01-29 |
AU7972700A (en) | 2001-04-30 |
ZA200202602B (en) | 2003-09-23 |
CA2387597A1 (en) | 2001-04-26 |
EP1230404A1 (en) | 2002-08-14 |
NO995072D0 (no) | 1999-10-18 |
WO2001029271A1 (en) | 2001-04-26 |
KR20020042721A (ko) | 2002-06-05 |
EP1230404B1 (en) | 2003-12-17 |
ES2213049T3 (es) | 2004-08-16 |
JP2003512523A (ja) | 2003-04-02 |
DE60007355T2 (de) | 2004-10-07 |
CN1379825A (zh) | 2002-11-13 |
NO995072L (no) | 2001-04-19 |
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Free format text: ANULADA A PUBLICACAO CODIGO 24.8 NA RPI NO 2256 DE 01/04/2014 POR TER SIDO INDEVIDA. |
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