JPS5741306A - Dephosphorization method of molten iron - Google Patents

Dephosphorization method of molten iron

Info

Publication number
JPS5741306A
JPS5741306A JP11796980A JP11796980A JPS5741306A JP S5741306 A JPS5741306 A JP S5741306A JP 11796980 A JP11796980 A JP 11796980A JP 11796980 A JP11796980 A JP 11796980A JP S5741306 A JPS5741306 A JP S5741306A
Authority
JP
Japan
Prior art keywords
molten iron
gaseous
na2co3
contg
cracking
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
JP11796980A
Other languages
Japanese (ja)
Other versions
JPS5755762B2 (en
Inventor
Osamu Haida
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 JP11796980A priority Critical patent/JPS5741306A/en
Publication of JPS5741306A publication Critical patent/JPS5741306A/en
Publication of JPS5755762B2 publication Critical patent/JPS5755762B2/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 obtain high dephosphorization effect by a small amount of Na2CO3 by dephosphorizing molten iron by using flux consisting essentially of Na2CO3 in the stage of maintaining the increased partial pressure of the gaseous CO to be blown into the molten iron. CONSTITUTION:In adding flux consisting essentially of Na2CO3 into molten iron, gaseous CO or a gas contg. gaseous CO is blown into the molten iron through the bottom tuyere of, for example, a reactor contg. the molten iron, and the molten iron is thoroughly stirred. For example, waste gases of converters are usable as the CO- contg. gas. The enrichment of the partial pressure of the gaseous CO in the molten iron is caused by the blowing of the gaseous CO, and the eventual decarburization reaction is suppressed. Hence, the greater part of the CO2 produced by cracking of the Na2CO3 is used for the formation of P2O5 without being used for decarburization reaction. The Na2O and P2O5 which are the other products of cracking of the Na2CO2 existing near the P2O5 are caused to react effectively to allow Na3PO4 to form which is fixed in slag, whereby dephosphorization is quickly progressed.
JP11796980A 1980-08-27 1980-08-27 Dephosphorization method of molten iron Granted JPS5741306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11796980A JPS5741306A (en) 1980-08-27 1980-08-27 Dephosphorization method of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11796980A JPS5741306A (en) 1980-08-27 1980-08-27 Dephosphorization method of molten iron

Publications (2)

Publication Number Publication Date
JPS5741306A true JPS5741306A (en) 1982-03-08
JPS5755762B2 JPS5755762B2 (en) 1982-11-26

Family

ID=14724751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11796980A Granted JPS5741306A (en) 1980-08-27 1980-08-27 Dephosphorization method of molten iron

Country Status (1)

Country Link
JP (1) JPS5741306A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63144435U (en) * 1987-03-12 1988-09-22

Also Published As

Publication number Publication date
JPS5755762B2 (en) 1982-11-26

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