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TW200730636A - Dephosphorization process of molten iron - Google Patents

Dephosphorization process of molten iron

Info

Publication number
TW200730636A
TW200730636A TW095141467A TW95141467A TW200730636A TW 200730636 A TW200730636 A TW 200730636A TW 095141467 A TW095141467 A TW 095141467A TW 95141467 A TW95141467 A TW 95141467A TW 200730636 A TW200730636 A TW 200730636A
Authority
TW
Taiwan
Prior art keywords
molten iron
iron
oxygen source
dephosphorization
dephosphorization process
Prior art date
Application number
TW095141467A
Other languages
Chinese (zh)
Other versions
TWI310053B (en
Inventor
Yuichi Uchida
Masaru Washio
Akihiko Inoue
Yasunori Muraki
Yasuo Kishimoto
Fujiki Shotaro
Original Assignee
Jef 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 Jef Steel Corp filed Critical Jef Steel Corp
Publication of TW200730636A publication Critical patent/TW200730636A/en
Application granted granted Critical
Publication of TWI310053B publication Critical patent/TWI310053B/zh

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
    • 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
    • C21C7/0645—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
    • C21C7/072—Treatment with gases

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

Dephosphorization process of molten iron in the present invention is by adding a dephosphorization refining agent mainly composed of CaO into iron to form slag. A supply system supplies gaseous oxygen source to the liquid surface of the molten iron and the other supply system supplies solid oxygen source by using a carrier gas to the nearby liquid surface of the molten iron where gaseous oxygen source is supplied. Thus, superior dephosphorization efficiency and iron yield over the conventional method can be obtained without using fluorine-containing flux.
TW095141467A 2005-11-09 2006-11-09 Dephosphorization process of molten iron TW200730636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005324253 2005-11-09

Publications (2)

Publication Number Publication Date
TW200730636A true TW200730636A (en) 2007-08-16
TWI310053B TWI310053B (en) 2009-05-21

Family

ID=38023387

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095141467A TW200730636A (en) 2005-11-09 2006-11-09 Dephosphorization process of molten iron

Country Status (4)

Country Link
KR (1) KR101001078B1 (en)
CN (1) CN101305105B (en)
TW (1) TW200730636A (en)
WO (1) WO2007055404A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR2021011498A2 (en) * 2013-01-18 2023-01-23 Jfe Steel Corp STEEL CONSTRUCTION METHOD INSIDE THE CONVERTER.
KR101677341B1 (en) * 2014-12-03 2016-11-18 주식회사 포스코 Highly efficient method for hot metal pretreatment
JP6773135B2 (en) * 2017-01-18 2020-10-21 Ｊｆｅスチール株式会社 How to dephosphorize hot metal
WO2020195598A1 (en) * 2019-03-22 2020-10-01 Ｊｆｅスチール株式会社 Blowing control method of converter-type dephosphorization refining furnace and blowing control device
TWI737504B (en) * 2020-09-28 2021-08-21 中國鋼鐵股份有限公司 Dephosphorization method of basic oxygen furnace slag

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147506A (en) * 1982-02-27 1983-09-02 Kawasaki Steel Corp Preliminary treatment of molten iron
JPS5989710A (en) * 1982-11-11 1984-05-24 Kawasaki Steel Corp Immersion lance for treatment of molten metal
JPS59157209A (en) 1983-02-25 1984-09-06 Sumitomo Metal Ind Ltd Pretreatment of molten iron
JPS60162712A (en) 1984-02-02 1985-08-24 Nippon Steel Corp Method for blowing powder into molten iron
JPS61201712A (en) * 1985-03-02 1986-09-06 Kobe Steel Ltd Pretreatment of molten pig iron
JPH01287213A (en) * 1988-05-11 1989-11-17 Nkk Corp Method for reducing Cr ore in hot metal pretreatment
JPH11256217A (en) * 1998-03-10 1999-09-21 Nippon Steel Corp Supply method of auxiliary materials for converter
JP2001131629A (en) * 1999-11-04 2001-05-15 Nippon Steel Corp Top blow lance for hot metal dephosphorization and hot metal dephosphorization method
JP2004190101A (en) * 2002-12-12 2004-07-08 Nippon Steel Corp Hot metal pretreatment method

Also Published As

Publication number Publication date
CN101305105A (en) 2008-11-12
KR101001078B1 (en) 2010-12-14
CN101305105B (en) 2010-09-08
TWI310053B (en) 2009-05-21
WO2007055404A1 (en) 2007-05-18
KR20080059226A (en) 2008-06-26

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