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BR0005311A - Método para tratamento da escória resultante do refino de aço inoxidável - Google Patents

Método para tratamento da escória resultante do refino de aço inoxidável

Info

Publication number
BR0005311A
BR0005311A BR0005311A BR0005311A BR0005311A BR 0005311 A BR0005311 A BR 0005311A BR 0005311 A BR0005311 A BR 0005311A BR 0005311 A BR0005311 A BR 0005311A BR 0005311 A BR0005311 A BR 0005311A
Authority
BR
Brazil
Prior art keywords
slag
stainless steel
sulfur
steel refining
treating
Prior art date
Application number
BR0005311A
Other languages
English (en)
Inventor
Hisahiro Matsunaga
Chikashi Tada
Masato Kumagai
Toshikazu Sakuraya
Original Assignee
Kawasaki Steel Co
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 Kawasaki Steel Co filed Critical Kawasaki Steel Co
Publication of BR0005311A publication Critical patent/BR0005311A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B5/00—Treatment of  metallurgical  slag ; Artificial stone from molten  metallurgical  slag 
    • C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
    • 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
    • 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
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1075—Chromium-free or very low chromium-content materials
    • 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)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Details (AREA)

Abstract

Patente de Invenção: <B>"MéTODO PARA TRATAMENTO DA ESCóRIA RESULTANTE DO REFINO DE AçO INOXIDáVEL"<D>. A presente invenção fornece um método para o tratamento da escória resultante do refino de aço inoxidável, que compreende o ajuste da escória em um estado fundido formada em uma etapa do refino do aço inoxidável de tal forma que a escória tenha uma basicidade na faixa de 1,3-4,0, e misturando-se a escória com um material contendo enxofre onde o enxofre tenha valência zero ou negativa, ajustando assim a concentração de enxofre na escória para que não seja de menos de 0,2% em peso. De acordo com a invenção, a escória é modificada de forma que seja substancial e completamente evitado que o Cr^ 6+^ saia, e a escória possa ser eficazmente utilizada como material de leito de estrada e como material de recuperação para trabalhos de engenharia civil. Em particular, neste método, a escória é apagada a uma velocidade tal de resfriamento que a temperatura da escória seja reduzida de 1200°C para 400° num período de 48 horas de forma que os efeitos notáveis são alcançados.
BR0005311A 1999-03-10 2000-03-02 Método para tratamento da escória resultante do refino de aço inoxidável BR0005311A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6275299 1999-03-10
JP2000028821A JP2000319047A (ja) 1999-03-10 2000-02-07 ステンレス鋼精錬スラグの改質処理方法
PCT/JP2000/001235 WO2000053539A1 (fr) 1999-03-10 2000-03-02 Traitement de scories d'affinage d'acier inoxydable

Publications (1)

Publication Number Publication Date
BR0005311A true BR0005311A (pt) 2001-01-30

Family

ID=26403799

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0005311A BR0005311A (pt) 1999-03-10 2000-03-02 Método para tratamento da escória resultante do refino de aço inoxidável

Country Status (9)

Country Link
US (1) US6732547B1 (pt)
EP (1) EP1094043A1 (pt)
JP (1) JP2000319047A (pt)
KR (1) KR100530197B1 (pt)
CN (1) CN1262509C (pt)
BR (1) BR0005311A (pt)
CA (1) CA2331182A1 (pt)
TW (1) TW500711B (pt)
WO (1) WO2000053539A1 (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100805057B1 (ko) * 2001-12-21 2008-02-20 주식회사 포스코 수쇄슬래그의 제조방법
KR100460096B1 (ko) * 2002-04-01 2004-12-04 주식회사 한테크 폐기물 처리 방법 및 그 폐기물 처리로 획득되는 고형화물질
KR100889685B1 (ko) * 2002-12-24 2009-03-19 주식회사 포스코 스테인레스강의 고청정 정련방법
ES2297704T3 (es) * 2004-05-18 2008-05-01 Holcim Ltd. Procedimiento para la reduccion de cr en escorias metalurgicas que contienen cr.
JP5407337B2 (ja) * 2009-01-06 2014-02-05 大同特殊鋼株式会社 還元スラグの処理方法
CN102534066B (zh) * 2011-12-13 2013-06-26 河南科技大学 一种高温液态钢渣处理方法
KR101131671B1 (ko) 2012-01-02 2012-03-28 황효규 산업폐기물의 처리방법
CN105039617B (zh) * 2015-09-08 2017-09-01 华北理工大学 堆存eaf不锈钢渣的处理方法
CN106282746B (zh) * 2016-08-19 2018-05-22 东北大学 一种渣浴还原处理电炉不锈钢渣的方法
CN113416814B (zh) * 2021-08-25 2021-11-09 天津市新天钢钢铁集团有限公司 一种lf炉精炼渣零排放的实现方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1051627A (en) * 1903-01-06 1913-01-28 Atlas Portland Cement Company Apparatus for producing cement.
US964805A (en) * 1907-07-01 1910-07-19 Atlas Portland Cement Company Apparatus for producing cement.
US980606A (en) * 1910-03-16 1911-01-03 Heinrich Colloseus Process of granulating molten slag.
US3054139A (en) * 1956-08-22 1962-09-18 George A Bartholomew Method and apparatus for pelleting molten slag
US3523775A (en) * 1967-07-10 1970-08-11 United States Steel Corp Method and apparatus for treating slag
US3594142A (en) * 1968-06-05 1971-07-20 Nat Slag Ltd Processes for the pelletization of metallurgical slag
JP2872586B2 (ja) * 1994-10-05 1999-03-17 川崎製鉄株式会社 ステンレス鋼スラグの改質方法
JP3586311B2 (ja) * 1995-05-01 2004-11-10 新日本製鐵株式会社 含クロム鋼スラグおよびその排滓処理方法
US6547959B1 (en) * 2000-09-19 2003-04-15 United Laboratories International, Llc Method for treating hazardous and corrosion-inducing sulfur compounds

Also Published As

Publication number Publication date
US6732547B1 (en) 2004-05-11
CN1262509C (zh) 2006-07-05
WO2000053539A1 (fr) 2000-09-14
CN1304387A (zh) 2001-07-18
JP2000319047A (ja) 2000-11-21
KR20010043459A (ko) 2001-05-25
TW500711B (en) 2002-09-01
KR100530197B1 (ko) 2005-11-22
CA2331182A1 (en) 2000-09-14
EP1094043A1 (en) 2001-04-25

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Legal Events

Date Code Title Description
B25D Requested change of name of applicant approved
B25G Requested change of headquarter approved
B07A Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PRESENTE PEDIDO DE PATENTE COMO INVENCAO - DE ACORDO COM O ART. 8O DA LPI.