JPS57131314A - Top and bottom blown converter - Google Patents

Top and bottom blown converter

Info

Publication number
JPS57131314A
JPS57131314A JP1375881A JP1375881A JPS57131314A JP S57131314 A JPS57131314 A JP S57131314A JP 1375881 A JP1375881 A JP 1375881A JP 1375881 A JP1375881 A JP 1375881A JP S57131314 A JPS57131314 A JP S57131314A
Authority
JP
Japan
Prior art keywords
sublance
converter
tuyeres
metal
bottom blown
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
JP1375881A
Other languages
Japanese (ja)
Other versions
JPS6140012B2 (en
Inventor
Masataka Yoshii
Makoto Wake
Nozomi Matsumoto
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 JP1375881A priority Critical patent/JPS57131314A/en
Publication of JPS57131314A publication Critical patent/JPS57131314A/en
Publication of JPS6140012B2 publication Critical patent/JPS6140012B2/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
    • C21C5/35—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 improve gaseous metal and slag metal reactivity and to achieve remarkable improvement of operating conditions such as prevention of oscillations of a top and bottom blown converter by disposing plural tuyeres and a sublance descending point in specific positions in said converter. CONSTITUTION:In a top and bottom blown converter consisting of a furnace bottom shell 1, etc., plural tuyeres 4 are disposed within an oxygen injection range 6 from a top blowing lance 8, and a sublance descending point 5 is so disposed as to be equidistant to at least two tuyeres 4-5, 4-6 near said point 5. If operations are performed with the above-mentioned converter, the total Fe in slag are reduced considerably, and the value of P2O5%/P% is increased; also, the flow deviation and collision of molten metal against the sublance is prevented, and its bending and breakage are prevented, whereby the uniformity of sampling is made sure. The effect of suppressing splashes is also high, and, for example, the frequencies for removing the base metal stuck on the furnace port are reduced to 1/2 that in the prior art.
JP1375881A 1981-02-03 1981-02-03 Top and bottom blown converter Granted JPS57131314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1375881A JPS57131314A (en) 1981-02-03 1981-02-03 Top and bottom blown converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1375881A JPS57131314A (en) 1981-02-03 1981-02-03 Top and bottom blown converter

Publications (2)

Publication Number Publication Date
JPS57131314A true JPS57131314A (en) 1982-08-14
JPS6140012B2 JPS6140012B2 (en) 1986-09-06

Family

ID=11842143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1375881A Granted JPS57131314A (en) 1981-02-03 1981-02-03 Top and bottom blown converter

Country Status (1)

Country Link
JP (1) JPS57131314A (en)

Also Published As

Publication number Publication date
JPS6140012B2 (en) 1986-09-06

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