JPS56116806A - Operation of blast furnace - Google Patents

Operation of blast furnace

Info

Publication number
JPS56116806A
JPS56116806A JP1607080A JP1607080A JPS56116806A JP S56116806 A JPS56116806 A JP S56116806A JP 1607080 A JP1607080 A JP 1607080A JP 1607080 A JP1607080 A JP 1607080A JP S56116806 A JPS56116806 A JP S56116806A
Authority
JP
Japan
Prior art keywords
burden
blowing
amount
melt
top pressure
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
JP1607080A
Other languages
Japanese (ja)
Other versions
JPS5748602B2 (en
Inventor
Shigenori Uno
Yasushi Shiotani
Mitsuo Kamata
Nobuo Ishioka
Mitsuo Yagi
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 JP1607080A priority Critical patent/JPS56116806A/en
Publication of JPS56116806A publication Critical patent/JPS56116806A/en
Publication of JPS5748602B2 publication Critical patent/JPS5748602B2/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
    • 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 prevent blowing-through and to maintain a safety operation in low burden level or low burden-level blowing-down operation by adjusting air-blowing amount and furnace-top pressure at the time when the distance between the top layer of the melt-deposit zone and raw material burden level varies abnormally. CONSTITUTION:In the process of lowering the burden or raising the burden level, the shape of the melt-deposit zone is esitimated continuously, and when the top layer of the melt-deposit zone approaches the burden and results in a decreased amount of block-type burden just above the melt-deposit zone, an operation is performed to reduce the amount of blowing or to increase the furnace top pressure. In this process of operation, when the above distance becomes abnormally small, the furnace-top pressure is raised in advance, gas flow is suppressed, thereafter the amount of blow is decreased; in this manner, the above distance can be maintained at the specified value, and blowing-through and a large slip can be prevented. The decreased amount of air blow is properly at about 0.1Nm<3> per inside capacity; however, if there is a delay in lowering the top pressure, then, the decreased amount of air blow is preferably at about 0.15-0.20Nm<3>/min per inside capacity.
JP1607080A 1980-02-14 1980-02-14 Operation of blast furnace Granted JPS56116806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1607080A JPS56116806A (en) 1980-02-14 1980-02-14 Operation of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1607080A JPS56116806A (en) 1980-02-14 1980-02-14 Operation of blast furnace

Publications (2)

Publication Number Publication Date
JPS56116806A true JPS56116806A (en) 1981-09-12
JPS5748602B2 JPS5748602B2 (en) 1982-10-16

Family

ID=11906300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1607080A Granted JPS56116806A (en) 1980-02-14 1980-02-14 Operation of blast furnace

Country Status (1)

Country Link
JP (1) JPS56116806A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0480211U (en) * 1990-11-26 1992-07-13
JP2010280985A (en) * 2009-06-08 2010-12-16 Nippon Steel Corp Method for descending operation of blast furnace
JP2013256697A (en) * 2012-06-13 2013-12-26 Nippon Steel & Sumitomo Metal Corp Method for start-up operation of suspended blast furnace

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58184804U (en) * 1982-06-03 1983-12-08 ミツミ電機株式会社 Chip type variable resistor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0480211U (en) * 1990-11-26 1992-07-13
JP2010280985A (en) * 2009-06-08 2010-12-16 Nippon Steel Corp Method for descending operation of blast furnace
JP2013256697A (en) * 2012-06-13 2013-12-26 Nippon Steel & Sumitomo Metal Corp Method for start-up operation of suspended blast furnace

Also Published As

Publication number Publication date
JPS5748602B2 (en) 1982-10-16

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