JPS55158204A - Blast furnace operating method - Google Patents

Blast furnace operating method

Info

Publication number
JPS55158204A
JPS55158204A JP6702079A JP6702079A JPS55158204A JP S55158204 A JPS55158204 A JP S55158204A JP 6702079 A JP6702079 A JP 6702079A JP 6702079 A JP6702079 A JP 6702079A JP S55158204 A JPS55158204 A JP S55158204A
Authority
JP
Japan
Prior art keywords
blast
tuyeres
closed
case
tuyere
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
JP6702079A
Other languages
Japanese (ja)
Inventor
Yoshimasa Kajiwara
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 JP6702079A priority Critical patent/JPS55158204A/en
Publication of JPS55158204A publication Critical patent/JPS55158204A/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

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 stabilize the conditions of the blast furnace by providing the plural continuous closed tuyere groups by way of three or more open tuyeres inbetween in the case of decreasing blast and subsequently opening the closed tuyere groups from the end or both ends in the case of increasing blast. CONSTITUTION:In the case of reducing the blast by closing part of tuyeres owing to the occurrence of blow-through and a large amount of deposits in the blast furnace during the blast furnace operation, plural continuous tuyere groups are closed such as tuyeres No.1-No.4 and tuyeres No.11-No.14, and at least three or more open tuyeres are provided between these, whereby the blast reduction is done. In the case of restoring the air flow to the original and increasing the blast upon stabilization of the furnace conditions, the closed tuyere groups No.1-NO.4 and No.11-No.14 are subsequently opened from the tuyere at one end or those at both ends to open all the closed tuyeres, whereby the original operating condition is restored.
JP6702079A 1979-05-30 1979-05-30 Blast furnace operating method Pending JPS55158204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6702079A JPS55158204A (en) 1979-05-30 1979-05-30 Blast furnace operating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6702079A JPS55158204A (en) 1979-05-30 1979-05-30 Blast furnace operating method

Publications (1)

Publication Number Publication Date
JPS55158204A true JPS55158204A (en) 1980-12-09

Family

ID=13332792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6702079A Pending JPS55158204A (en) 1979-05-30 1979-05-30 Blast furnace operating method

Country Status (1)

Country Link
JP (1) JPS55158204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0992753A2 (en) * 1998-08-04 2000-04-12 Linde Aktiengesellschaft Operating process for a shaft furnace and shaft furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0992753A2 (en) * 1998-08-04 2000-04-12 Linde Aktiengesellschaft Operating process for a shaft furnace and shaft furnace
EP0992753A3 (en) * 1998-08-04 2001-08-08 Linde Gas Aktiengesellschaft Operating process for a shaft furnace and shaft furnace

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