JPS5521555A - Blast method of smelting furnace - Google Patents

Blast method of smelting furnace

Info

Publication number
JPS5521555A
JPS5521555A JP9412078A JP9412078A JPS5521555A JP S5521555 A JPS5521555 A JP S5521555A JP 9412078 A JP9412078 A JP 9412078A JP 9412078 A JP9412078 A JP 9412078A JP S5521555 A JPS5521555 A JP S5521555A
Authority
JP
Japan
Prior art keywords
tuyeres
main
auxiliary
blast furnace
hot blasts
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
JP9412078A
Other languages
Japanese (ja)
Inventor
Masahiko Taniguchi
Masanori Ueda
Osami Ichiko
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 JP9412078A priority Critical patent/JPS5521555A/en
Publication of JPS5521555A publication Critical patent/JPS5521555A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres

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 this smelting furnce, by using coke with comparative, small strength by dividing the tuyeres of a blast furnace into main tuyeres and auxiliary tuyeres and by blowing in hot blasts with high oxidative component concentration from the auxiliary tuyeres in quantity less than the quantity of hot blasts from the main tuyeres. CONSTITUTION:In iron-manufacturing operation in a blast furnace, the tuyeres of the blast furnace are installed in shapes that are divided into main tuyeres 1 and auxiliary tuyeres 2. The auxiliary tuyeres 2 are located at portions lower than positions higher only by the 1/2 of an inner diameter of the blast furnace in some height of the main tuyeres 1. Hot blasts blown in from the auxiliary tuyeres 2 shall be not more than 2/3 of hot blasts from the main tuyeres 1 in the blowing-in flow rate and the quantity of blowing-in. At the same time, the oxidative components of oxygen, steam, carbon dioxide, etc. in hot blasts blown in from the auxiliary tuyeres 2 shall be concentration not less than one and a half times in the molar fraction of oxidative components in hot blasts blown in main tuyeres 1. The conditions of the blast furnace are also stabilized because the lathe ways 11 of the main tuyeres 1 become stable even if using coke that its strength is small and is powdery.
JP9412078A 1978-08-03 1978-08-03 Blast method of smelting furnace Pending JPS5521555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9412078A JPS5521555A (en) 1978-08-03 1978-08-03 Blast method of smelting furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9412078A JPS5521555A (en) 1978-08-03 1978-08-03 Blast method of smelting furnace

Publications (1)

Publication Number Publication Date
JPS5521555A true JPS5521555A (en) 1980-02-15

Family

ID=14101558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9412078A Pending JPS5521555A (en) 1978-08-03 1978-08-03 Blast method of smelting furnace

Country Status (1)

Country Link
JP (1) JPS5521555A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383144B (en) * 1983-12-12 1987-05-25 Voest Alpine Ag METHOD FOR STARTING UP AN INSULATED BLAST FURNACE AND BLAST FURNACE FOR CARRYING OUT THIS METHOD
JPH06316713A (en) * 1993-04-28 1994-11-15 Nkk Corp Operation of blast furnace
JP2002324584A (en) * 2001-04-24 2002-11-08 Toshiba Battery Co Ltd Flat nonaqueous electrolyte secondary battery with lead terminal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383144B (en) * 1983-12-12 1987-05-25 Voest Alpine Ag METHOD FOR STARTING UP AN INSULATED BLAST FURNACE AND BLAST FURNACE FOR CARRYING OUT THIS METHOD
JPH06316713A (en) * 1993-04-28 1994-11-15 Nkk Corp Operation of blast furnace
JP2002324584A (en) * 2001-04-24 2002-11-08 Toshiba Battery Co Ltd Flat nonaqueous electrolyte secondary battery with lead terminal

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