JPS56127711A - Blast furnace operation process - Google Patents

Blast furnace operation process

Info

Publication number
JPS56127711A
JPS56127711A JP2830280A JP2830280A JPS56127711A JP S56127711 A JPS56127711 A JP S56127711A JP 2830280 A JP2830280 A JP 2830280A JP 2830280 A JP2830280 A JP 2830280A JP S56127711 A JPS56127711 A JP S56127711A
Authority
JP
Japan
Prior art keywords
molten metal
blast furnace
oxygen
trumpet
furnace bottom
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
JP2830280A
Other languages
Japanese (ja)
Other versions
JPS5748606B2 (en
Inventor
Yoshiyuki Matoba
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 JP2830280A priority Critical patent/JPS56127711A/en
Publication of JPS56127711A publication Critical patent/JPS56127711A/en
Publication of JPS5748606B2 publication Critical patent/JPS5748606B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace

Landscapes

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

Abstract

PURPOSE:To decrease the fuel ratio and Si content in molten metal in a blast furnace operation by blowing oxygen gas into molten metal accumulated in the trumpet of the furnace bottom. CONSTITUTION:Multiple oxygen-blowing nozzles 7 of refractory brick are installed, with equal intervals, on the peripheral wall 5 of blast furnace bottom trumpet zone, at locations above the level of tap hole 4 and below the level of tuyere 2. When molten metal A is accumulated in the furnace bottom trumpet, high-pressure oxygen gas is blown from the nozzles 7 into the metal. The oxygen oxidizes Si in the molten metal and maintains its content as low as 0.2-0.3%. Heat generated by Si oxidation is utilized and, as a result, coke fuel ratio is reduced. Part of the oxygen reacts with coke and C in molten metal, and produces CO, which increases the reduction capability for iron ore.
JP2830280A 1980-03-05 1980-03-05 Blast furnace operation process Granted JPS56127711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2830280A JPS56127711A (en) 1980-03-05 1980-03-05 Blast furnace operation process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2830280A JPS56127711A (en) 1980-03-05 1980-03-05 Blast furnace operation process

Publications (2)

Publication Number Publication Date
JPS56127711A true JPS56127711A (en) 1981-10-06
JPS5748606B2 JPS5748606B2 (en) 1982-10-16

Family

ID=12244820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2830280A Granted JPS56127711A (en) 1980-03-05 1980-03-05 Blast furnace operation process

Country Status (1)

Country Link
JP (1) JPS56127711A (en)

Also Published As

Publication number Publication date
JPS5748606B2 (en) 1982-10-16

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