ES2189850T3 - Metodo para uso directo de mineral de cromita en la produccion de acero inoxidable. - Google Patents

Metodo para uso directo de mineral de cromita en la produccion de acero inoxidable.

Info

Publication number
ES2189850T3
ES2189850T3 ES96118054T ES96118054T ES2189850T3 ES 2189850 T3 ES2189850 T3 ES 2189850T3 ES 96118054 T ES96118054 T ES 96118054T ES 96118054 T ES96118054 T ES 96118054T ES 2189850 T3 ES2189850 T3 ES 2189850T3
Authority
ES
Spain
Prior art keywords
bath
oxygen
lance
stage
carbon
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 - Lifetime
Application number
ES96118054T
Other languages
English (en)
Inventor
David M Kundrat
Allan M Smillie
Richard C Sussman
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.)
Armco Inc
Original Assignee
Armco 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
Application filed by Armco Inc filed Critical Armco Inc
Application granted granted Critical
Publication of ES2189850T3 publication Critical patent/ES2189850T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21C5/005—Manufacture of stainless steel
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel
    • 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
    • C21C2250/00—Specific additives; Means for adding material different from burners or lances
    • C21C2250/08—Porous plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
    • F27D2003/164—Oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material
    • F27D2027/002—Gas stirring

Landscapes

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

Abstract

UN PROCEDIMIENTO DE TRES FASES PARA OBTENER UNIDADES DE CR METALICAS IN SITU DURANTE LA PRODUCCION DE ACERO INOXIDABLE. MINERAL DE CROMITA EN BRUTO O UN CONCENTRADO PRODUCIDO A PARTIR DE MINERAL DE CROMITA ES MEZCLADO CON UN REDUCTOR CARBONOSO Y SE AÑADEN AGENTES DE ESCORIFICACION A UN BAÑO DE HIERRO (24) PARA FUNDIR Y REFINAR EN UN REACTOR DE REFINADO (10). DURANTE LA PRIMERA FASE, LA CROMITA PARCIALMENTE METALIZADA ES FUNDIDA POR CARBONO EN EL REACTOR QUE ES SOPLADO ARRIBA Y ABAJO CON OXIGENO Y GASES QUE CONTIENEN OXIGENO RESPECTIVAMENTE PARA PRODUCIR UN BAÑO DE ALEACION DE CROMO QUE TIENE UNA SATURACION BASTANTE POR DEBAJO DEL CONTENIDO DE CARBONO. EN LA SEGUNDA FASE, EL BAÑO DE ALEACION ES DESCARBURIZADO SIENDO AGITADO POR DEBAJO CON EL GAS QUE CONTIENE OXIGENO PARA LA ESPECIFICACION DE CARBONO DEL BAÑO FINAL. EN LA TERCERA FASE EL BAÑO DE ALEACION ES REDUCIDO MEDIANTE UN REDUCTOR METALOIDE COMO SILICIO O UN REDUCTOR METALICO COMO ALUMINIO Y DE NUEVO ES AGITADO POR DEBAJO PERO CON UN GAS NO OXIDANTE PARA LOGRAR UN ALTO RENDIMIENTO DE CROMO. EL REACTOR INCLUYE UNA LANZA SUPERIOR (18) QUE SE EXTIENDE HACIA UN PASAJE (14) CON UNA PORCION INFERIOR (20) DE LA LANZA QUE SE EXTIENDE A UN PUNTO JUSTO ENCIMA DEL BAÑO Y ELEMENTOS (22) COMO UN TAPON DE TOBERA O POROSO MONTADO EN O JUNTO A UN FONDO (16) Y QUE SE EXTIENDE A TRAVES DE UN FORRO REFRACTARIO (12) PARA AGITAR EL BAÑO DE HIERRO QUE CONTIENE CARBONO DISUELTO. LA LANZA (18) INCLUYE UN PASAJE CENTRAL PARA INYECTAR UN GAS DE OXIGENO DE CHORRO ENFOCADO, COMPACTO (30) QUE PUEDE ENTRAR A TRAVES DE UNA CAPA DE ESCORIA (26) PARA DESCARBURIZACION DEL BAÑO DE HIERRO Y UN PASAJE EXTERIOR PARA DESCARGAR UN GAS DE OXIGENO (28) POR ENCIMA DEL BAÑO PARA UNA COMBUSTION POSTERIOR DE CO A CO{SUB,2}. EL PASAJE INCLUYE UNA PLURALIDAD DE BOQUILLAS DE SEPARACION ANULARES SEPARADAS IGUALMENTE. LA LANZA TAMBIEN INCLUYE UN PAR DE CONDUCTOS CONCENTRICOS PARA LLEVAR UN REFRIGERANTE.
ES96118054T 1995-12-14 1996-11-11 Metodo para uso directo de mineral de cromita en la produccion de acero inoxidable. Expired - Lifetime ES2189850T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/573,316 US5702502A (en) 1995-12-14 1995-12-14 Method for direct use of chromite ore in the production of stainless steel

Publications (1)

Publication Number Publication Date
ES2189850T3 true ES2189850T3 (es) 2003-07-16

Family

ID=24291481

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96118054T Expired - Lifetime ES2189850T3 (es) 1995-12-14 1996-11-11 Metodo para uso directo de mineral de cromita en la produccion de acero inoxidable.

Country Status (16)

Country Link
US (1) US5702502A (es)
EP (1) EP0779373B1 (es)
JP (1) JP2865639B2 (es)
KR (1) KR970043113A (es)
CN (1) CN1046968C (es)
AT (1) ATE234942T1 (es)
AU (1) AU702699B2 (es)
BR (1) BR9603943A (es)
CA (1) CA2184317A1 (es)
DE (1) DE69626760T2 (es)
ES (1) ES2189850T3 (es)
IN (1) IN190534B (es)
MX (1) MX9605042A (es)
TR (1) TR199601015A2 (es)
TW (1) TW334478B (es)
ZA (1) ZA967598B (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6245289B1 (en) 1996-04-24 2001-06-12 J & L Fiber Services, Inc. Stainless steel alloy for pulp refiner plate
JPH09310126A (ja) * 1996-05-16 1997-12-02 Daido Steel Co Ltd 金属酸化物から金属を得る製造方法
JP3721154B2 (ja) * 2002-10-18 2005-11-30 新日本製鐵株式会社 クロム含有溶湯の精錬方法
KR100887859B1 (ko) * 2002-11-07 2009-03-09 주식회사 포스코 크롬 광석의 직접환원을 통한 스테인레스강 제조방법
DE10317195B4 (de) * 2003-04-15 2006-03-16 Karl Brotzmann Consulting Gmbh Verfahren zur Verbesserung der Energiezufuhr in ein Schrotthaufwerk
US7648933B2 (en) 2006-01-13 2010-01-19 Dynamic Abrasives Llc Composition comprising spinel crystals, glass, and calcium iron silicate
US7637984B2 (en) * 2006-09-29 2009-12-29 Uop Llc Integrated separation and purification process
US8377372B2 (en) * 2009-11-30 2013-02-19 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dynamic lances utilizing fluidic techniques
US8323558B2 (en) * 2009-11-30 2012-12-04 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dynamic control of lance utilizing counterflow fluidic techniques
CN102485918B (zh) * 2010-12-04 2013-09-25 山西太钢不锈钢股份有限公司 一种顶底复吹转炉冶炼不锈钢的方法
CN105154622A (zh) * 2015-10-14 2015-12-16 华北理工大学 转炉炼钢吹炼复合氧化剂
CN105443873A (zh) * 2015-12-22 2016-03-30 唐艺峰 一种不锈钢管及其制备方法
CN110431243A (zh) * 2017-03-21 2019-11-08 朗盛德国有限责任公司 制备含铁和铬的颗粒的方法
CN108893668A (zh) * 2018-08-01 2018-11-27 中冶东方工程技术有限公司 铁素体不锈钢的生产方法
CN111208259B (zh) * 2018-11-06 2022-03-22 宝武特种冶金有限公司 一种连铸结晶器保护渣的渣金反应模拟试验装置及其方法
CN109735676B (zh) * 2019-03-19 2020-11-24 山西太钢不锈钢股份有限公司 一种低磷含铬铁水的生产方法
US20230304110A1 (en) * 2020-09-10 2023-09-28 Jfe Steel Corporation Method for producing chromium-containing molten steel
EP4056720A1 (de) * 2021-03-08 2022-09-14 SMS Group GmbH Verfahren zum herstellen einer ferrolegierung mit niedrigem kohlenstoffgehalt

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8104474A (nl) * 1981-10-01 1983-05-02 Estel Hoogovens Bv Vloeistofgekoelde lans voor het blazen van zuurstof op een staalbad.
JPS58117852A (ja) * 1981-12-29 1983-07-13 Sumitomo Metal Ind Ltd フエロクロム製造方法及び装置
DE3230013C2 (de) * 1982-08-12 1985-07-25 Krupp Stahl Ag, 4630 Bochum Verfahren und Vorrichtung zur Erschmelzung von Chrom-Nickel-Stählen
US4572747A (en) * 1984-02-02 1986-02-25 Armco Inc. Method of producing boron alloy
US4565574A (en) * 1984-11-19 1986-01-21 Nippon Steel Corporation Process for production of high-chromium alloy by smelting reduction
US4961784A (en) * 1987-08-13 1990-10-09 Nkk Corporation Method of smelting reduction of chromium raw materials and a smelting reduction furnace thereof
JPS6455360A (en) * 1987-08-26 1989-03-02 Sumitomo Metal Ind Smelting reduction process for chromitite
JPH01215912A (ja) * 1988-02-24 1989-08-29 Kawasaki Steel Corp 含クロム溶鉄の製造方法
WO1990015165A1 (en) * 1989-06-02 1990-12-13 Cra Services Limited Manufacture of ferroalloys using a molten bath reactor
US5609669A (en) * 1993-11-22 1997-03-11 Brunner; Mikael Method of manufacturing stainless steel
US5567224A (en) * 1995-06-06 1996-10-22 Armco Inc. Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame
JP3165913B2 (ja) * 1997-08-28 2001-05-14 住友重機械工業株式会社 磁場分布測定装置

Also Published As

Publication number Publication date
TW334478B (en) 1998-06-21
JP2865639B2 (ja) 1999-03-08
MX9605042A (es) 1997-06-28
BR9603943A (pt) 1998-06-09
EP0779373B1 (en) 2003-03-19
CN1046968C (zh) 1999-12-01
DE69626760T2 (de) 2004-02-05
JPH09176723A (ja) 1997-07-08
IN190534B (es) 2003-08-09
DE69626760D1 (de) 2003-04-24
AU7415796A (en) 1997-06-19
CN1167837A (zh) 1997-12-17
US5702502A (en) 1997-12-30
ZA967598B (en) 1997-03-26
KR970043113A (ko) 1997-07-26
CA2184317A1 (en) 1997-06-15
AU702699B2 (en) 1999-03-04
ATE234942T1 (de) 2003-04-15
TR199601015A2 (tr) 1997-07-21
TR199601015A3 (es) 1997-07-21
EP0779373A1 (en) 1997-06-18

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