TW200741014A - Process for dephosphorizing hot metal - Google Patents

Process for dephosphorizing hot metal

Info

Publication number
TW200741014A
TW200741014A TW096106728A TW96106728A TW200741014A TW 200741014 A TW200741014 A TW 200741014A TW 096106728 A TW096106728 A TW 096106728A TW 96106728 A TW96106728 A TW 96106728A TW 200741014 A TW200741014 A TW 200741014A
Authority
TW
Taiwan
Prior art keywords
molten iron
hot metal
treatment
dephosphorization
dephosphorized
Prior art date
Application number
TW096106728A
Other languages
Chinese (zh)
Other versions
TWI318644B (en
Inventor
Akihiko Inoue
Yuichi Uchida
Shotaro Fujiki
Yasuo Kishimoto
Original Assignee
Jfe 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
Application filed by Jfe Steel Corp filed Critical Jfe Steel Corp
Publication of TW200741014A publication Critical patent/TW200741014A/en
Application granted granted Critical
Publication of TWI318644B publication Critical patent/TWI318644B/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
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for 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
    • 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
    • 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

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)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

A method in which a smelting agent consisting mainly of a CaO source and an oxygen source are added to molten iron to conduct a dephosphorization treatment. In the method, the molten iron is dephosphorized so that the slag after the treatment has a basicity of 2.2-3.5, excluding 2.2, and a total iron concentration of 10-30 mass% and that the final treatment temperature of the molten iron is 1,320 DEG C or higher. Thus, the dephosphorization can be accelerated while ensuring a high manganese yield and the molten iron can be efficiently dephosphorized.
TW096106728A 2006-02-28 2007-02-27 Process for dephosphorizing hot metal TWI318644B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006052362 2006-02-28

Publications (2)

Publication Number Publication Date
TW200741014A true TW200741014A (en) 2007-11-01
TWI318644B TWI318644B (en) 2009-12-21

Family

ID=38459204

Family Applications (1)

Application Number Title Priority Date Filing Date
TW096106728A TWI318644B (en) 2006-02-28 2007-02-27 Process for dephosphorizing hot metal

Country Status (5)

Country Link
KR (1) KR101251093B1 (en)
CN (2) CN104531948B (en)
BR (1) BRPI0708359A2 (en)
TW (1) TWI318644B (en)
WO (1) WO2007100109A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI667350B (en) * 2016-12-26 2019-08-01 日商日本製鐵股份有限公司 Pretreatment method of lyophilization and manufacturing method of extremely low phosphorus steel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956045B (en) * 2010-09-27 2012-09-05 攀钢集团钢铁钒钛股份有限公司 Refining slag and method for refining molten steel
KR101237487B1 (en) * 2010-10-07 2013-02-26 (주)유진에코씨엘 Method for dephosphorsing during pre-treating pig iron using waste materials of steel making process
KR101677341B1 (en) * 2014-12-03 2016-11-18 주식회사 포스코 Highly efficient method for hot metal pretreatment

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10237526A (en) * 1997-02-26 1998-09-08 Sumitomo Metal Ind Ltd Dephosphorization of hot metal
CN1046139C (en) * 1997-10-08 1999-11-03 冶金工业部钢铁研究总院 Pre-dephosporizing method for molten iron
JP2002309310A (en) * 1998-06-18 2002-10-23 Nkk Corp Method for producing low-phosphorous molten iron
JP2000345226A (en) * 1999-06-02 2000-12-12 Sumitomo Metal Ind Ltd Method for dephosphorizing molten iron
JP2001040409A (en) * 1999-07-30 2001-02-13 Nippon Steel Corp Method for dephosphorizing molten iron
JP2002249814A (en) * 2000-12-21 2002-09-06 Nkk Corp Method for producing low phosphorus molten iron
CN100351399C (en) * 2001-02-07 2007-11-28 新日本制铁株式会社 Method for pig iron melt dephosphorize
JP3705170B2 (en) * 2001-08-10 2005-10-12 Ｊｆｅスチール株式会社 Hot phosphorus dephosphorization method
JP4082365B2 (en) * 2004-03-23 2008-04-30 住友金属工業株式会社 Steel manufacturing method
JP5031977B2 (en) * 2004-05-31 2012-09-26 Ｊｆｅスチール株式会社 Hot metal dephosphorization method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI667350B (en) * 2016-12-26 2019-08-01 日商日本製鐵股份有限公司 Pretreatment method of lyophilization and manufacturing method of extremely low phosphorus steel

Also Published As

Publication number Publication date
BRPI0708359A2 (en) 2011-05-24
CN101389771B (en) 2015-12-16
CN104531948A (en) 2015-04-22
KR20080089650A (en) 2008-10-07
TWI318644B (en) 2009-12-21
KR101251093B1 (en) 2013-04-04
WO2007100109A1 (en) 2007-09-07
CN104531948B (en) 2017-04-12
CN101389771A (en) 2009-03-18

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