JPS57140808A - Preliminary refining method of molten iron - Google Patents

Preliminary refining method of molten iron

Info

Publication number
JPS57140808A
JPS57140808A JP2493881A JP2493881A JPS57140808A JP S57140808 A JPS57140808 A JP S57140808A JP 2493881 A JP2493881 A JP 2493881A JP 2493881 A JP2493881 A JP 2493881A JP S57140808 A JPS57140808 A JP S57140808A
Authority
JP
Japan
Prior art keywords
slag
molten iron
steel making
molten
assistants
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
JP2493881A
Other languages
Japanese (ja)
Inventor
Yozo Takemura
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 JP2493881A priority Critical patent/JPS57140808A/en
Publication of JPS57140808A publication Critical patent/JPS57140808A/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 perform effective desulfurization and dephosphorization in preliminary refining of molten steel by adding the synthetic slag prepd. by adding assistants to steel making slag in a molten state and melting the same then cooling and grinding the mixture to molten iron and agitating these. CONSTITUTION:Assistants such as iron oxide, fluorite, lime, etc. are added and melted to and in steel making slab in a molten state discharged from a steel making furnace, after which the mixture is cooled and ground. The resultant synthetic slag is added under agitation to molten iron by an injection method or a mechanical agitation method, whereby the molten iron is desulfurized and dephosphorized and is thus preliminarily refined. The synthetic slag is obtained by the component control of the steel making slag, and according to experiment, the assistants are so added as to obtain T, Ca%/T, Fe%=0.5-3.0 of the synthetic slag. Further, in the stage of an injection method using an inert gas or carrier gas such as gaseous N2 or gaseous Ar or a mechanical agitation method, T.Ca%/T.Fe%=0.5-2.0 are more preferable.
JP2493881A 1981-02-24 1981-02-24 Preliminary refining method of molten iron Pending JPS57140808A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2493881A JPS57140808A (en) 1981-02-24 1981-02-24 Preliminary refining method of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2493881A JPS57140808A (en) 1981-02-24 1981-02-24 Preliminary refining method of molten iron

Publications (1)

Publication Number Publication Date
JPS57140808A true JPS57140808A (en) 1982-08-31

Family

ID=12151995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2493881A Pending JPS57140808A (en) 1981-02-24 1981-02-24 Preliminary refining method of molten iron

Country Status (1)

Country Link
JP (1) JPS57140808A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001240910A (en) * 2000-03-02 2001-09-04 Nippon Steel Corp Method for treating molten iron using decarburized slag
EP1186676A3 (en) * 2000-09-12 2003-06-04 Voest-Alpine Industrieanlagenbau GmbH & Co. Method and installation for the treatment, especially the desulfurisation and/or dephosphorisation, of metal melts, in particular of pig iron

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524487A (en) * 1978-08-11 1980-02-21 Kokoku Gomme Kogyo Kk High-sensitivity pressure sensitive resistor and manufature thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524487A (en) * 1978-08-11 1980-02-21 Kokoku Gomme Kogyo Kk High-sensitivity pressure sensitive resistor and manufature thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001240910A (en) * 2000-03-02 2001-09-04 Nippon Steel Corp Method for treating molten iron using decarburized slag
EP1186676A3 (en) * 2000-09-12 2003-06-04 Voest-Alpine Industrieanlagenbau GmbH & Co. Method and installation for the treatment, especially the desulfurisation and/or dephosphorisation, of metal melts, in particular of pig iron

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