JPS563614A - Refining method of steel - Google Patents

Refining method of steel

Info

Publication number
JPS563614A
JPS563614A JP7738979A JP7738979A JPS563614A JP S563614 A JPS563614 A JP S563614A JP 7738979 A JP7738979 A JP 7738979A JP 7738979 A JP7738979 A JP 7738979A JP S563614 A JPS563614 A JP S563614A
Authority
JP
Japan
Prior art keywords
steel bath
nozzles
stirring
converter
steel
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
JP7738979A
Other languages
Japanese (ja)
Other versions
JPS5844121B2 (en
Inventor
Nobuyoshi Hiroki
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 JP7738979A priority Critical patent/JPS5844121B2/en
Publication of JPS563614A publication Critical patent/JPS563614A/en
Publication of JPS5844121B2 publication Critical patent/JPS5844121B2/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
    • 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
    • C21C5/34—Blowing 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 let the stirring of molten metal at the end period of blowing be done sufficinetly and improve refining efficiency by making combined provision of the double pipe nozzles of the specific shape to the underside of the steel bath of an oxygen top blowing converter and performing gas blowing under the fixed conditions. CONSTITUTION:In the operation of the top blowing converter, the production of CO decreases owing to the decrease in the C content and the stirring action of the steel bath by CO decreases in the end period of refinng. In order to prevent this and improve the refining efficiency of the converter, a plurality of double pipe nozzles of such shape, size and pressure conditions as to satisfy the formulas are provided to the underside of the steel bath and one or two more kinds of inert gasses such as Ar, Kr, Xe are blown into the steel bath through the slits 5 between the inside pipes 6 and outside pipes 7. The ratio Po/Pe of the outlet pressure Po of the gasses of that time and the static pressure Pe of the steel bath around the nozzles is made 1.89 or more. The gases are blown stably without the entry of the steel bath into the nozzles, whereby the stirring of the steel bath is accomplished sufficiently and the decarburization refining, etc. are accelerated.
JP7738979A 1979-06-18 1979-06-18 steel refining method Expired JPS5844121B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7738979A JPS5844121B2 (en) 1979-06-18 1979-06-18 steel refining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7738979A JPS5844121B2 (en) 1979-06-18 1979-06-18 steel refining method

Publications (2)

Publication Number Publication Date
JPS563614A true JPS563614A (en) 1981-01-14
JPS5844121B2 JPS5844121B2 (en) 1983-10-01

Family

ID=13632527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7738979A Expired JPS5844121B2 (en) 1979-06-18 1979-06-18 steel refining method

Country Status (1)

Country Link
JP (1) JPS5844121B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61142626A (en) * 1984-12-14 1986-06-30 Toshiba Corp Impregnated cathode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61142626A (en) * 1984-12-14 1986-06-30 Toshiba Corp Impregnated cathode

Also Published As

Publication number Publication date
JPS5844121B2 (en) 1983-10-01

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