JPS5690913A - Molten iron treatment - Google Patents

Molten iron treatment

Info

Publication number
JPS5690913A
JPS5690913A JP16785479A JP16785479A JPS5690913A JP S5690913 A JPS5690913 A JP S5690913A JP 16785479 A JP16785479 A JP 16785479A JP 16785479 A JP16785479 A JP 16785479A JP S5690913 A JPS5690913 A JP S5690913A
Authority
JP
Japan
Prior art keywords
molten iron
blown
furnace
accomplished
gas
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
JP16785479A
Other languages
Japanese (ja)
Other versions
JPS6056201B2 (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 JP16785479A priority Critical patent/JPS6056201B2/en
Publication of JPS5690913A publication Critical patent/JPS5690913A/en
Publication of JPS6056201B2 publication Critical patent/JPS6056201B2/en
Expired 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)
  • Treatment Of Steel In Its Molten State (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To perform impurity removal from molten iron continuously by using a bottom blown converter or resembling blown vessel in removing Si, S, P, C from molten iron. CONSTITUTION:Blast furnace molten iron is charged into a Q-BOP furnace and pulverized lime is blown through a furnace bottom tuyere by a pure oxygen gas, whereby temperature elevation and desiliconization are accomplished. Upon ending of the desiliconization, the carrier gas is changed over to N2 and CaO is blown through the furnace bottom tuyere, whereby desulfurization is accomplished. After this, again the gas is changed over to an oxygen gas and decarbonization and dephosphorization are accomplished while a dephosphorizing agent is being blown. By this treatment, C is controlled to about 1-3%, Si to a trace, Mo to about 0.2%, P to about 0.02-0.03% and S to about 0.01%. The molten iron having undergone such treatments is charged into an LD converter or Q-BOP furnace, where it is subjected to decarbonization process.
JP16785479A 1979-12-24 1979-12-24 Hot metal processing method Expired JPS6056201B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16785479A JPS6056201B2 (en) 1979-12-24 1979-12-24 Hot metal processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16785479A JPS6056201B2 (en) 1979-12-24 1979-12-24 Hot metal processing method

Publications (2)

Publication Number Publication Date
JPS5690913A true JPS5690913A (en) 1981-07-23
JPS6056201B2 JPS6056201B2 (en) 1985-12-09

Family

ID=15857314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16785479A Expired JPS6056201B2 (en) 1979-12-24 1979-12-24 Hot metal processing method

Country Status (1)

Country Link
JP (1) JPS6056201B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63148801U (en) * 1987-03-20 1988-09-30

Also Published As

Publication number Publication date
JPS6056201B2 (en) 1985-12-09

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