JPS57203712A - Refining method for molten iron - Google Patents

Refining method for molten iron

Info

Publication number
JPS57203712A
JPS57203712A JP8933281A JP8933281A JPS57203712A JP S57203712 A JPS57203712 A JP S57203712A JP 8933281 A JP8933281 A JP 8933281A JP 8933281 A JP8933281 A JP 8933281A JP S57203712 A JPS57203712 A JP S57203712A
Authority
JP
Japan
Prior art keywords
molten iron
lance
blowing
liquid
immersed
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
JP8933281A
Other languages
Japanese (ja)
Other versions
JPS6152211B2 (en
Inventor
Mitsuhiko Nishimura
Morikatsu Sakurada
Kiyoshi Ochi
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 JP8933281A priority Critical patent/JPS57203712A/en
Publication of JPS57203712A publication Critical patent/JPS57203712A/en
Publication of JPS6152211B2 publication Critical patent/JPS6152211B2/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
    • 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
    • C21C5/32—Blowing from above
    • 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 shorten the time required for molten iron refining and to increase the useful life of an immersed lance, by blowing liquid CO2 into a molten iron from blowing ports provided to the vicinity of the tip and the side wall of the immersed lance, and top-blowing gaseous oxygen from a multilance. CONSTITUTION:A molten iron 17 is agitated by blowing liquid CO2 from a lance 1 immersed into the molten iron 17 in a reaction vessel 16. At the same time, gaseous oxygen is top-blown by a multilance 15. At this time, the liquid CO2 is blown off from blowing ports 3, 4 and 5 provided to the tip of the lance 1 and from ports 6, 7, 8, 9, 10 and 11 provided to the side wall of said lance to agitate the molten iron 17 powerfully so as to perform decarbonization in a short time. Further, at the same time, the useful life of the lance 1 is prolonged by cooling effect due to the phase change of liquid CO2 to the gas phase.
JP8933281A 1981-06-10 1981-06-10 Refining method for molten iron Granted JPS57203712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8933281A JPS57203712A (en) 1981-06-10 1981-06-10 Refining method for molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8933281A JPS57203712A (en) 1981-06-10 1981-06-10 Refining method for molten iron

Publications (2)

Publication Number Publication Date
JPS57203712A true JPS57203712A (en) 1982-12-14
JPS6152211B2 JPS6152211B2 (en) 1986-11-12

Family

ID=13967724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8933281A Granted JPS57203712A (en) 1981-06-10 1981-06-10 Refining method for molten iron

Country Status (1)

Country Link
JP (1) JPS57203712A (en)

Also Published As

Publication number Publication date
JPS6152211B2 (en) 1986-11-12

Similar Documents

Publication Publication Date Title
ES8101648A1 (en) Converter steelmaking process.
JPS57145917A (en) Refining method for high chromium steel
JPS5623215A (en) Converter steel making method
JPS5613423A (en) Refining method for steel
JPS55158208A (en) Refining method of steel
JPS57203712A (en) Refining method for molten iron
JPS55158211A (en) Refining device of steel having gas circulating system
EP0015396B1 (en) A method for increasing vessel lining life for basic oxygen furnaces
JPS5591926A (en) Preparation of extremely low carbon nitrogen stainless steel
JPS57203711A (en) Refining method in steel making
SU795504A3 (en) Method of copper matte conversion
JPS52105515A (en) Dephosphorization of molten pig iron
JPS5760004A (en) Converter refining method
JPS5747807A (en) Simultaneous dephosphorization and desulfurization method for molten iron
JPS648211A (en) Method for pretreating molten iron
JPS5565313A (en) Steel manufacture with top blown oxygen
JPS556476A (en) Atmosphere shielding method in ladle refining
JPS5792115A (en) Dephosphorization method for molten iron
JPS5589416A (en) Preparation of nitrogen containing steel
JPS6455360A (en) Smelting reduction process for chromitite
JPS55164014A (en) Steel refining method
JPS57188609A (en) Upward and downward blowing method
JPS6452016A (en) Method for controlling molten steel temperature in vacuum ladle refining for high chromium steel
JPS57149409A (en) Refining by top and bottom blowing converter
Nilles Recent Developments in Pneumatic Steelmaking