JPS55164014A - Steel refining method - Google Patents

Steel refining method

Info

Publication number
JPS55164014A
JPS55164014A JP7276579A JP7276579A JPS55164014A JP S55164014 A JPS55164014 A JP S55164014A JP 7276579 A JP7276579 A JP 7276579A JP 7276579 A JP7276579 A JP 7276579A JP S55164014 A JPS55164014 A JP S55164014A
Authority
JP
Japan
Prior art keywords
oxygen
blown
steel
gas
blow
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
JP7276579A
Other languages
Japanese (ja)
Inventor
Takeyuki Hirata
Nobuhide Aoki
Isao Yamazaki
Masaharu Anezaki
Tsutomu Kajimoto
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
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP7276579A priority Critical patent/JPS55164014A/en
Publication of JPS55164014A publication Critical patent/JPS55164014A/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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To reduce iron oxides within a molten slag by a method wherein, after blow refining by an oxygen top blown method is stopped, gas blowing under a bath level is carried out in a specified condition to reinforce a stirring force of a steel bath to promote dephosphorization. CONSTITUTION:A predetermined amount of oxygen is blown into an oxygen top blown rotary converter 1 from an oxygen lance 3 and, at the same time when oxygen is blown or after said oxygen blowing is completed, a gas such as carbon dioxide or the like is blown under a bath level within 5min or less in a flow amount 0.3Nm<3>/min or less per t of molten steel from a gas blow-in nozzle 2 provided to a furnace bottom. By this steel refining method, the equilibrium promotion between molten steel-molten slag and the cooling regulation during stopping high temp. blow refining can be controlled highly precisely and, moreover, the reducing effect of T, Fe is expected.
JP7276579A 1979-06-08 1979-06-08 Steel refining method Pending JPS55164014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7276579A JPS55164014A (en) 1979-06-08 1979-06-08 Steel refining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7276579A JPS55164014A (en) 1979-06-08 1979-06-08 Steel refining method

Publications (1)

Publication Number Publication Date
JPS55164014A true JPS55164014A (en) 1980-12-20

Family

ID=13498786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7276579A Pending JPS55164014A (en) 1979-06-08 1979-06-08 Steel refining method

Country Status (1)

Country Link
JP (1) JPS55164014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623214A (en) * 1979-08-02 1981-03-05 Nippon Steel Corp Dephosphorization accelerating method in oxygen top blowing steel making method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623214A (en) * 1979-08-02 1981-03-05 Nippon Steel Corp Dephosphorization accelerating method in oxygen top blowing steel making method
JPS5847450B2 (en) * 1979-08-02 1983-10-22 新日本製鐵株式会社 Method for promoting dephosphorization in oxygen top-blown steelmaking process

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