BR0006876A - Método para a refinação de aço fundido e aparelho para o mesmo - Google Patents

Método para a refinação de aço fundido e aparelho para o mesmo

Info

Publication number
BR0006876A
BR0006876A BR0006876-4A BR0006876A BR0006876A BR 0006876 A BR0006876 A BR 0006876A BR 0006876 A BR0006876 A BR 0006876A BR 0006876 A BR0006876 A BR 0006876A
Authority
BR
Brazil
Prior art keywords
molten steel
immersion tube
refining
pressure
cylindrical immersion
Prior art date
Application number
BR0006876-4A
Other languages
English (en)
Inventor
Okitomo Kunitake
Norio Omura
Wataru Sakai
Susumu Mukawa
Tadashi Imai
Original Assignee
Nippon Steel Corp
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 JP16970699A external-priority patent/JP3777065B2/ja
Priority claimed from JP21520599A external-priority patent/JP3742534B2/ja
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of BR0006876A publication Critical patent/BR0006876A/pt

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
    • 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
    • C21C7/064—Dephosphorising; Desulfurising
    • 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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • 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
    • C21C7/10—Handling in a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

Patente de Invenção:<B>"MéTODO PARA A REFINAçãO DE AçO FUNDIDO E APARELHO PARA O MESMO"<D>. Um método para a refinação de aço fundido pela imersão da extremidade de abertura inferior de um tubo de imersão cilíndrico equipado com uma lança dentro do aço fundido contido em um colherão, controle da pressão no tubo de imersão cilíndrido para uma faixa de pressão prescrita para aspirar o aço fundido, injeção de um gás de agitação da parte inferior do colherão para a superfície do aço fundido aspirado, e descarburação e refinação do aço fundido sob uma pressão reduzida, caracterizado pelo fato de que o método compreende as etapas de: controlar a pressão Pt (Torr) no tubo de imersão cilíndrico de modo a satisfazer as fórmulas seguintes (1) e (2), soprar gás oxigênio para a superfície do aço fundido através da lança, e descarburizar e refinar o aço fundido sob uma pressão reduzida; Pt >760 - 1,297 x 10^ 7^/Dc^ 2^ ...(1) K = 1,71 x D1^ 0,211^ x Dc^ 0,438^ x Wm^ -1,124^ x Qg^ 0,519 x Pt^ -0,410^ > 0,046 ...(2) onde, K : coeficiente de capacidade com relação a reação de descarburação (I/min) D1 : diâmetro interno do colherão (cm) Dc : diâmetro reduzido do círculo do tubo de imersão cilíndrico (cm) Wm : massa do aço fundido por processamento (t) Qg : quantidade de injeção do gás de agitação (Nm^ 3^/h).
BR0006876-4A 1999-06-16 2000-05-12 Método para a refinação de aço fundido e aparelho para o mesmo BR0006876A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP16970699A JP3777065B2 (ja) 1999-06-16 1999-06-16 低炭素溶鋼の減圧下粉体脱りん方法および減圧下粉体脱りん用反応容器
JP21520599A JP3742534B2 (ja) 1999-02-18 1999-07-29 減圧精錬装置およびそれを用いた低炭素鋼の溶製方法
PCT/JP2000/003075 WO2000077264A1 (fr) 1999-06-16 2000-05-12 Procede et dispositif de raffinage d'acier fondu

Publications (1)

Publication Number Publication Date
BR0006876A true BR0006876A (pt) 2001-08-07

Family

ID=26492963

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0006876-4A BR0006876A (pt) 1999-06-16 2000-05-12 Método para a refinação de aço fundido e aparelho para o mesmo

Country Status (8)

Country Link
US (1) US6432164B1 (pt)
EP (3) EP1772525A1 (pt)
KR (1) KR100422886B1 (pt)
CN (2) CN1316045C (pt)
BR (1) BR0006876A (pt)
CA (1) CA2340690C (pt)
TW (1) TW459051B (pt)
WO (1) WO2000077264A1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101188324B1 (ko) 2010-11-05 2012-10-09 주식회사 포스코 진공탈가스 설비의 보수 방법
JP5876168B2 (ja) * 2012-03-13 2016-03-02 鞍鋼股▲ふん▼有限公司Ａｎｇａｎｇ Ｓｔｅｅｌ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ． 低コストの清浄鋼の製造方法
US8853121B1 (en) * 2013-10-16 2014-10-07 Clean Diesel Technology Inc. Thermally stable compositions of OSM free of rare earth metals
CN115505682B (zh) * 2022-09-14 2023-07-25 马鞍山钢铁股份有限公司 一种缩短低碳铝镇静钢lf炉冶炼时间的方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62205221A (ja) 1986-03-04 1987-09-09 Nippon Steel Corp 溶鋼の脱ガス、脱燐方法
JPH01156416A (ja) 1987-12-11 1989-06-20 Nippon Steel Corp 脱炭特性の優れた高クロム鋼の減圧脱炭法
JPH0649896B2 (ja) 1988-10-31 1994-06-29 新日本製鐵株式会社 溶鋼の脱ガス・脱りん方法
CN2040910U (zh) * 1988-11-29 1989-07-12 北京科技大学 一种单嘴真空精炼设备
JPH04285111A (ja) 1991-03-12 1992-10-09 Nippon Steel Corp 極低炭素溶鋼の減圧脱炭方法
JPH0598340A (ja) 1991-10-07 1993-04-20 Nippon Steel Corp 極低炭素鋼の溶製方法およびその装置
JP3168437B2 (ja) 1992-05-15 2001-05-21 新日本製鐵株式会社 真空精錬方法
JP3000864B2 (ja) 1994-10-11 2000-01-17 住友金属工業株式会社 溶鋼の真空脱硫精錬方法
DE69624783T2 (de) * 1995-08-01 2003-09-25 Nippon Steel Corp Verfahren zum vakuumfeinen von stahlschmelze
JPH09157730A (ja) 1995-09-29 1997-06-17 Nippon Steel Corp 槽昇降方式の真空脱ガス設備
JP3526687B2 (ja) 1996-03-25 2004-05-17 新日本製鐵株式会社 低炭素鋼の精錬方法
JPH09287017A (ja) 1996-04-19 1997-11-04 Nippon Steel Corp 高純度鋼溶製方法
JPH09287016A (ja) 1996-04-19 1997-11-04 Nippon Steel Corp ステンレス鋼溶製方法
EP0881304B1 (en) * 1996-11-20 2002-10-23 Nippon Steel Corporation Method of vacuum decarburization/refining of molten steel and apparatus therefor
JPH1150132A (ja) 1997-07-29 1999-02-23 Harima Ceramic Co Ltd 溶鋼処理用浸漬管
JPH1161237A (ja) * 1997-08-26 1999-03-05 Sumitomo Metal Ind Ltd 極低炭素鋼の真空精錬による製造方法

Also Published As

Publication number Publication date
US6432164B1 (en) 2002-08-13
CA2340690A1 (en) 2000-12-21
TW459051B (en) 2001-10-11
CN1298868C (zh) 2007-02-07
WO2000077264A1 (fr) 2000-12-21
KR20010072682A (ko) 2001-07-31
EP1757706A2 (en) 2007-02-28
CA2340690C (en) 2005-03-15
EP1111073A4 (en) 2005-05-18
EP1757706B1 (en) 2014-10-08
EP1772525A1 (en) 2007-04-11
EP1757706A3 (en) 2007-04-04
CN1629324A (zh) 2005-06-22
CN1318108A (zh) 2001-10-17
CN1316045C (zh) 2007-05-16
KR100422886B1 (ko) 2004-03-12
EP1111073A1 (en) 2001-06-27

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Legal Events

Date Code Title Description
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/05/2000, OBSERVADAS AS CONDICOES LEGAIS.

B25D Requested change of name of applicant approved

Owner name: NIPPON STEEL AND SUMITOMO METAL CORPORATION (JP)

B25D Requested change of name of applicant approved

Owner name: NIPPON STEEL CORPORATION (JP)

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 12.05.2020