BR0305712A - Cast Phosphorus Dephosphorization Method - Google Patents

Cast Phosphorus Dephosphorization Method

Info

Publication number
BR0305712A
BR0305712A BR0305712-7A BR0305712A BR0305712A BR 0305712 A BR0305712 A BR 0305712A BR 0305712 A BR0305712 A BR 0305712A BR 0305712 A BR0305712 A BR 0305712A
Authority
BR
Brazil
Prior art keywords
cast
dephosphorization
iron
pig iron
reducing
Prior art date
Application number
BR0305712-7A
Other languages
Portuguese (pt)
Inventor
Junichi Fukumi
Osamu Yamase
Ichiro Kikuchi
Original Assignee
Jfe Eng 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
Application filed by Jfe Eng Corp filed Critical Jfe Eng Corp
Publication of BR0305712A publication Critical patent/BR0305712A/en

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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/06—Constructional features of mixers for pig-iron

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (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)

Abstract

"MéTODO DE DEFOSFORIZAçãO DE FERRO-GUSA FUNDIDO". A presente invenção refere-se a um método de defosforização de um ferro-gusa fundido, o qual permite reduzir uma concentração de T.Fe nas escórias a cerca de 10% em massa ou menos sem usar qualquer fundente não-preferencial, tal como CaCl~ 2~, dos pontos de vista das instalações e dos ambientes, e sem aplicar uma potência de agitação excessivamente elevada, deste modo obtendo melhora na capacidade de defosforização, redução de eventos de queda da temperatura do ferro-gusa fundido através da redução da quantidade de uso da fonte de oxigênio, tal como minério de ferro, e redução dos problemas operacionais. Como meios para solução, em um aparelho de defosforização de ferro-gusa fundido que usa um equipamento para acionar um impulsor de agitação para revolver para agitar mecanicamente o ferro-gusa fundido, é realizado um processo de defosforização definindo condições que satisfaçam (profundidade cóncava calculada do ferro-gusa fundido em agitação)/(diâmetro do receptáculo do processamento) <242> 0,85."METHOD OF DEFOSPHORIZATION OF CAST IRON". The present invention relates to a method of dephosphorization of a molten pig iron which allows a concentration of T.Fe in the slag to be reduced to about 10% by weight or less without using any non-preferred flux such as CaCl From the point of view of installations and environments, and without applying excessively high stirring power, thereby obtaining improved dephosphorization capacity, reducing cast iron temperature drop events by reducing the amount of oxygen source, such as iron ore, and reducing operational problems. As a means of solution, in a cast pig iron dephosphorization apparatus that uses equipment to drive a stirring impeller to revolve to mechanically stir the cast pig iron, a dephosphorization process is performed defining conditions that satisfy (calculated concave depth stirring pig iron) / (processing vessel diameter) <242> 0,85.

BR0305712-7A 2002-08-01 2003-07-25 Cast Phosphorus Dephosphorization Method BR0305712A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002224762A JP2004068036A (en) 2002-08-01 2002-08-01 Method for dephosphorizing molten iron
PCT/JP2003/009465 WO2004013358A1 (en) 2002-08-01 2003-07-25 Method for dephosphorization of molten iron

Publications (1)

Publication Number Publication Date
BR0305712A true BR0305712A (en) 2004-09-28

Family

ID=31492138

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0305712-7A BR0305712A (en) 2002-08-01 2003-07-25 Cast Phosphorus Dephosphorization Method

Country Status (4)

Country Link
JP (1) JP2004068036A (en)
BR (1) BR0305712A (en)
TW (1) TW200408713A (en)
WO (1) WO2004013358A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4986383B2 (en) * 2004-03-31 2012-07-25 Ｊｆｅスチール株式会社 Hot metal desulfurization method
JP4998676B2 (en) * 2006-03-29 2012-08-15 Ｊｆｅスチール株式会社 Method of stirring molten metal using impeller
KR101485529B1 (en) * 2013-08-07 2015-01-22 주식회사 포스코 Refining method of molten steel and an apparatus thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5993814A (en) * 1982-11-17 1984-05-30 Nippon Steel Corp Dephosphorizing method of molten iron

Also Published As

Publication number Publication date
TW200408713A (en) 2004-06-01
JP2004068036A (en) 2004-03-04
WO2004013358A1 (en) 2004-02-12

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Legal Events

Date Code Title Description
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired