JPS57137408A - Dephosphorization treatment of molten iron - Google Patents

Dephosphorization treatment of molten iron

Info

Publication number
JPS57137408A
JPS57137408A JP2083081A JP2083081A JPS57137408A JP S57137408 A JPS57137408 A JP S57137408A JP 2083081 A JP2083081 A JP 2083081A JP 2083081 A JP2083081 A JP 2083081A JP S57137408 A JPS57137408 A JP S57137408A
Authority
JP
Japan
Prior art keywords
molten iron
blowing
treatment
amt
charging
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
JP2083081A
Other languages
Japanese (ja)
Other versions
JPS6356286B2 (en
Inventor
Hideji Takeuchi
Toshihiko Emi
Tsutomu Nozaki
Hitoshi Morishita
Rinzo Tachibana
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 JP2083081A priority Critical patent/JPS57137408A/en
Priority to EP19810302859 priority patent/EP0043238B1/en
Priority to DE8181302859T priority patent/DE3166581D1/en
Priority to AU72345/81A priority patent/AU529793B2/en
Publication of JPS57137408A publication Critical patent/JPS57137408A/en
Publication of JPS6356286B2 publication Critical patent/JPS6356286B2/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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 a dephosphorization treatment effectively by holding the molten iron temp. during blowing in a specific range and blowing and charging a powdery refining agent, a flux, and a bottom blowing gas under specific conditions. CONSTITUTION:In a preliminary treatment for molten iron, the temp. elevation owing to the evolution of heat in accordance with the blowing treatment of the molten iron is suppressed by charging of coolants consisting of at least 1 kind of ore, mill scale, and scraps, whereby the molten iron temp. during blowing is maintained at 1,250-1,450 deg.C. A powdery refining agent is blown into the molten iron after it is so controlled with calcium carbonate which is a main component that the slag basicity CaO/SiO2 after the treatment of the molten iron is >=3. At least 1 kind of fluorite, cryolite, colemanite, and red mud which are the flux are chanrged in the state of lumps through the opening in the top part of the vessel. The bottom blowing gas is blown at about >=0.5Nm<3> feed rate per ton of the molten iron with respect to the amt of oxygen in the 8-15Nm<3> range per ton of the molten iron wherein the amt. of oxygen by charging of the coolants is taken into account but the amt. of oxygen consumed for desiliconization reaction is excluded.
JP2083081A 1980-06-28 1981-02-17 Dephosphorization treatment of molten iron Granted JPS57137408A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2083081A JPS57137408A (en) 1981-02-17 1981-02-17 Dephosphorization treatment of molten iron
EP19810302859 EP0043238B1 (en) 1980-06-28 1981-06-25 Method of dephosphorizing molten pig iron
DE8181302859T DE3166581D1 (en) 1980-06-28 1981-06-25 Method of dephosphorizing molten pig iron
AU72345/81A AU529793B2 (en) 1980-06-28 1981-06-29 Method of dephosphorizing molten pig iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2083081A JPS57137408A (en) 1981-02-17 1981-02-17 Dephosphorization treatment of molten iron

Publications (2)

Publication Number Publication Date
JPS57137408A true JPS57137408A (en) 1982-08-25
JPS6356286B2 JPS6356286B2 (en) 1988-11-08

Family

ID=12037958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2083081A Granted JPS57137408A (en) 1980-06-28 1981-02-17 Dephosphorization treatment of molten iron

Country Status (1)

Country Link
JP (1) JPS57137408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63169318A (en) * 1986-12-29 1988-07-13 Kawasaki Steel Corp Method of de-phosphorizing molten iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374693U (en) * 1989-11-21 1991-07-26

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51115219A (en) * 1975-04-02 1976-10-09 Nippon Steel Corp Process of preparing low-phosphor molten iron
JPS541221A (en) * 1977-06-06 1979-01-08 Sumitomo Metal Ind Ltd Method of dephosphorizing molten iron
JPS5475418A (en) * 1977-11-29 1979-06-16 Sumitomo Metal Ind Ltd Hot iron dephosphorization method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51115219A (en) * 1975-04-02 1976-10-09 Nippon Steel Corp Process of preparing low-phosphor molten iron
JPS541221A (en) * 1977-06-06 1979-01-08 Sumitomo Metal Ind Ltd Method of dephosphorizing molten iron
JPS5475418A (en) * 1977-11-29 1979-06-16 Sumitomo Metal Ind Ltd Hot iron dephosphorization method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63169318A (en) * 1986-12-29 1988-07-13 Kawasaki Steel Corp Method of de-phosphorizing molten iron

Also Published As

Publication number Publication date
JPS6356286B2 (en) 1988-11-08

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