JPS57169009A - Pretreatment of hot metal - Google Patents

Pretreatment of hot metal

Info

Publication number
JPS57169009A
JPS57169009A JP5471981A JP5471981A JPS57169009A JP S57169009 A JPS57169009 A JP S57169009A JP 5471981 A JP5471981 A JP 5471981A JP 5471981 A JP5471981 A JP 5471981A JP S57169009 A JPS57169009 A JP S57169009A
Authority
JP
Japan
Prior art keywords
reaction
gas
flux
hot metal
oxygen
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP5471981A
Other languages
Japanese (ja)
Inventor
Hiroyuki Katayama
Masatoshi Kuwabara
Takemasa Ono
Toshiyuki Kaneko
Tomi Inaba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
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
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP5471981A priority Critical patent/JPS57169009A/en
Publication of JPS57169009A publication Critical patent/JPS57169009A/en
Pending legal-status Critical Current

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

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)

Abstract

PURPOSE:To efficiently execute pretreatment of a hot metal, by adding CO2 of a proper quantity to oxygen-containing gas to be blasted together with a basic flux to the hot metal, and quickening a phosphorizing reaction, suppressing a decarburizing reaction. CONSTITUTION:A mixture of a flux and oxidizing gas, which are supplied from a flux feeder 7 and a gas flow rate controller 8 is blasted into a hot metal 5 in a ladle 1 through a lance 6 coated with fire-proof paint 11. Also, oxygen is supplied in the vicinity of the master surface from an oxygen gas blast device 12, and generated gas is sucked in through a hood 3. As for the gas for carrying this flux, CO2 is added to O2 so as to be CO2%/O2%=0.1-1. As a result, an ignition point cooling effect by an endothermic reaction of CO2 CO+[O]is increased, and partial pressure of gaseous CO is not lowered, therefore, an effective utilization factor to dephosphorizing reaction is raised. In this way, the effect for quickening the dephosphorizing reaction and suppressing the decarburizing reaction is stabilized.
JP5471981A 1981-04-11 1981-04-11 Pretreatment of hot metal Pending JPS57169009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5471981A JPS57169009A (en) 1981-04-11 1981-04-11 Pretreatment of hot metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5471981A JPS57169009A (en) 1981-04-11 1981-04-11 Pretreatment of hot metal

Publications (1)

Publication Number Publication Date
JPS57169009A true JPS57169009A (en) 1982-10-18

Family

ID=12978604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5471981A Pending JPS57169009A (en) 1981-04-11 1981-04-11 Pretreatment of hot metal

Country Status (1)

Country Link
JP (1) JPS57169009A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63180345A (en) * 1987-01-22 1988-07-25 Kawasaki Steel Corp Dephosphorization method for molten iron
CN114959157A (en) * 2022-04-22 2022-08-30 中国恩菲工程技术有限公司 Method and device for producing low-phosphorus molten iron by high-phosphorus reduced iron

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63180345A (en) * 1987-01-22 1988-07-25 Kawasaki Steel Corp Dephosphorization method for molten iron
CN114959157A (en) * 2022-04-22 2022-08-30 中国恩菲工程技术有限公司 Method and device for producing low-phosphorus molten iron by high-phosphorus reduced iron
CN114959157B (en) * 2022-04-22 2024-04-09 中国恩菲工程技术有限公司 Method and device for producing low-phosphorus molten iron from high-phosphorus reduced iron

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