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JPS5690914A - Molten iron treatment - Google Patents

Molten iron treatment

Info

Publication number
JPS5690914A
JPS5690914A JP16785579A JP16785579A JPS5690914A JP S5690914 A JPS5690914 A JP S5690914A JP 16785579 A JP16785579 A JP 16785579A JP 16785579 A JP16785579 A JP 16785579A JP S5690914 A JPS5690914 A JP S5690914A
Authority
JP
Japan
Prior art keywords
molten iron
furnace
blown
decarbonization
charged
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.)
Granted
Application number
JP16785579A
Other languages
Japanese (ja)
Other versions
JPS6140005B2 (en
Inventor
Tsutomu Nozaki
Kyoji Nakanishi
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP16785579A priority Critical patent/JPS5690914A/en
Publication of JPS5690914A publication Critical patent/JPS5690914A/en
Publication of JPS6140005B2 publication Critical patent/JPS6140005B2/ja
Granted 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 remove impurities advantageously by performing the processes of subjecting molten iron to light decarbonization, desiliconization, and dephosphorization simultaneously under the supply of an oxidative gas, within a bottom blown converter or resembling blown vessel. CONSTITUTION:After blast furnace molten iron is charged into a Q-BOP furnace, a desulfurizing agent ground to <=100 meshes is blown through the furnace bottom tuyere with a pure oxygen gas as a carrier gas. In this treatment, C is controlled to about 1-3%, Si to a trace, Mn to about 0.2% and P to about 0.02-0.05%. Thence, the molten iron is charged into an LD converter or Q-BOP furnace, where it is subjected to decarburization alone. Thereby, the removal of phosphorus and silicone is accomplished simultaneously with light decarbonization.
JP16785579A 1979-12-24 1979-12-24 Molten iron treatment Granted JPS5690914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16785579A JPS5690914A (en) 1979-12-24 1979-12-24 Molten iron treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16785579A JPS5690914A (en) 1979-12-24 1979-12-24 Molten iron treatment

Publications (2)

Publication Number Publication Date
JPS5690914A true JPS5690914A (en) 1981-07-23
JPS6140005B2 JPS6140005B2 (en) 1986-09-06

Family

ID=15857333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16785579A Granted JPS5690914A (en) 1979-12-24 1979-12-24 Molten iron treatment

Country Status (1)

Country Link
JP (1) JPS5690914A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953612A (en) * 1982-09-22 1984-03-28 Nippon Steel Corp Dephosphorizing method by simultaneous blowing of gaseous oxygen and dephosphorizing agent under bath surface
JP2011184753A (en) * 2010-03-09 2011-09-22 Kobe Steel Ltd Method for desiliconizing molten iron

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5199613A (en) * 1975-01-23 1976-09-02 Uss Eng & Consult
JPS5432118A (en) * 1977-08-17 1979-03-09 Sumitomo Metal Ind Ltd Manufacture of ultra low carbon steel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5199613A (en) * 1975-01-23 1976-09-02 Uss Eng & Consult
JPS5432118A (en) * 1977-08-17 1979-03-09 Sumitomo Metal Ind Ltd Manufacture of ultra low carbon steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953612A (en) * 1982-09-22 1984-03-28 Nippon Steel Corp Dephosphorizing method by simultaneous blowing of gaseous oxygen and dephosphorizing agent under bath surface
JP2011184753A (en) * 2010-03-09 2011-09-22 Kobe Steel Ltd Method for desiliconizing molten iron

Also Published As

Publication number Publication date
JPS6140005B2 (en) 1986-09-06

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