JPS5633404A - Method for blast furnace operation - Google Patents

Method for blast furnace operation

Info

Publication number
JPS5633404A
JPS5633404A JP10751879A JP10751879A JPS5633404A JP S5633404 A JPS5633404 A JP S5633404A JP 10751879 A JP10751879 A JP 10751879A JP 10751879 A JP10751879 A JP 10751879A JP S5633404 A JPS5633404 A JP S5633404A
Authority
JP
Japan
Prior art keywords
furnace
time
blast
air blast
charges
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
JP10751879A
Other languages
Japanese (ja)
Inventor
Michiharu Hatano
Hideyuki Yamaoka
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 JP10751879A priority Critical patent/JPS5633404A/en
Publication of JPS5633404A publication Critical patent/JPS5633404A/en
Pending 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
    • C21B5/006—Automatically controlling the process

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 carry out smoothly air blast starting after stopping the air blast by stoppings a predetermined amount of charges, T hours before beginning to stop air blast by means of measuring a falling time T in the furnace supplied with charges containing a lot of Mn a predetermined time before the beginning of stopping furnace blast. CONSTITUTION:A predetermined time (for example, 24hr) before the beginning time of stopping furnace blast, such a charge that Mn content in the charge (cokes, sintered ores, pellets, iron ores etc.) may be 150% more than normal amount is supplied by one charge and a rising time of Mn concentration in an outlet pig iron is detected, and a furnace inside falling time T required for the time from charging to producing pig iron is measured. And then, T hours before beginning to stop air blast, 3 or 4 ore charges of all charges are stopped and only cokes are charged. Or ores are controlled to distribute so as concentrate in the blast furnace top center. This method prevents the molten and adhering zone near the furnace bottom wall from solidifying during air blast stop.
JP10751879A 1979-08-23 1979-08-23 Method for blast furnace operation Pending JPS5633404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10751879A JPS5633404A (en) 1979-08-23 1979-08-23 Method for blast furnace operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10751879A JPS5633404A (en) 1979-08-23 1979-08-23 Method for blast furnace operation

Publications (1)

Publication Number Publication Date
JPS5633404A true JPS5633404A (en) 1981-04-03

Family

ID=14461221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10751879A Pending JPS5633404A (en) 1979-08-23 1979-08-23 Method for blast furnace operation

Country Status (1)

Country Link
JP (1) JPS5633404A (en)

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