JPS57104605A - Method for blowing out of blast furnace - Google Patents

Method for blowing out of blast furnace

Info

Publication number
JPS57104605A
JPS57104605A JP18241880A JP18241880A JPS57104605A JP S57104605 A JPS57104605 A JP S57104605A JP 18241880 A JP18241880 A JP 18241880A JP 18241880 A JP18241880 A JP 18241880A JP S57104605 A JPS57104605 A JP S57104605A
Authority
JP
Japan
Prior art keywords
furnace
pressure
blast
shell
discharging
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
JP18241880A
Other languages
Japanese (ja)
Inventor
Junji Kariya
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 JP18241880A priority Critical patent/JPS57104605A/en
Publication of JPS57104605A publication Critical patent/JPS57104605A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/14Discharging devices, e.g. for slag

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)

Abstract

PURPOSE:To permit discharging of approximately the entire amt. of residual molten iron by increasing the pressure in the furnace and seleting the position for piercing a horizontal hole for discharging at the region right under the furnace bottom in discharging the residual molten iron in the furnace. CONSTITUTION:When a blast furnace is to be blown out, first the supply of charging materials from the furnace top is stopped, after which the rate of blast is gradually decreased, thence an iron notch 5 is opened to allow molten iron and molten slag above its level to flow out. In parallel with the operation of reducing the blast, the cooling of a shell 2 is made weaker than before, and the shell is maintained at a high temp. After the notch 5 is closed, blasting is resumed through tuyeres to increase the pressure in the furnace slightly higher than the atmospheric pressure which is the pressure of the furnace outside. The position of the enroded surface of a furnace bottom 3a is forecast and operated from the temp. distribution in the furnace body height direction measured with the thermocouples buried in hearth side walls 3b or the like, and the bricks of the bottom 3a are pierced from the shell 2 side toward the position slightly lower (about 500mm.) than the above-described eroded surface in the furnace central part. When a discharge hole 6 inclining downward toward the outside of the furnace beyond the part right under the outside of the furnace beyond the part right under the conical part of the bottom 3a, is pierced hole 6 and the furnace inside are communicated by the high pressure in the furnace and the occurrence of joint breakage owing to loosening of the brick joint at the surface of the bottom 3a, and remaining molten slag is discharged.
JP18241880A 1980-12-22 1980-12-22 Method for blowing out of blast furnace Pending JPS57104605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18241880A JPS57104605A (en) 1980-12-22 1980-12-22 Method for blowing out of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18241880A JPS57104605A (en) 1980-12-22 1980-12-22 Method for blowing out of blast furnace

Publications (1)

Publication Number Publication Date
JPS57104605A true JPS57104605A (en) 1982-06-29

Family

ID=16117933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18241880A Pending JPS57104605A (en) 1980-12-22 1980-12-22 Method for blowing out of blast furnace

Country Status (1)

Country Link
JP (1) JPS57104605A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100431602B1 (en) * 2002-08-23 2004-05-17 주식회사 포스코 Drain promotion method of melting matter existing in the blast furnace when air dropping
KR100754149B1 (en) * 2001-09-06 2007-08-31 주식회사 포스코 A method for last blow working of blast furnace
JP2009124593A (en) * 2007-11-16 2009-06-04 Toa Corp Front panel for array speaker
WO2023223724A1 (en) * 2022-05-19 2023-11-23 Jfeスチール株式会社 Blast furnace operation method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100754149B1 (en) * 2001-09-06 2007-08-31 주식회사 포스코 A method for last blow working of blast furnace
KR100431602B1 (en) * 2002-08-23 2004-05-17 주식회사 포스코 Drain promotion method of melting matter existing in the blast furnace when air dropping
JP2009124593A (en) * 2007-11-16 2009-06-04 Toa Corp Front panel for array speaker
WO2023223724A1 (en) * 2022-05-19 2023-11-23 Jfeスチール株式会社 Blast furnace operation method

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