JPS57137402A - Low-silicon operation method for blast furnace in blowing of pulverized coal - Google Patents

Low-silicon operation method for blast furnace in blowing of pulverized coal

Info

Publication number
JPS57137402A
JPS57137402A JP2096181A JP2096181A JPS57137402A JP S57137402 A JPS57137402 A JP S57137402A JP 2096181 A JP2096181 A JP 2096181A JP 2096181 A JP2096181 A JP 2096181A JP S57137402 A JPS57137402 A JP S57137402A
Authority
JP
Japan
Prior art keywords
blowing
pulverized coal
iron
blast furnace
reduced
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
JP2096181A
Other languages
Japanese (ja)
Other versions
JPS5856721B2 (en
Inventor
Hisao Hamada
Nobuo Tsuchitani
Hisamitsu Koitabashi
Toshihiro Inatani
Kyoji Okabe
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP2096181A priority Critical patent/JPS5856721B2/en
Publication of JPS57137402A publication Critical patent/JPS57137402A/en
Publication of JPS5856721B2 publication Critical patent/JPS5856721B2/en
Expired 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
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C21B5/023—Injection of the additives into the melting part
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C21B5/023—Injection of the additives into the melting part
    • C21B5/026—Injection of the additives into the melting part of plastic material

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 reduce the content of Si in pig iron effectively by blowing iron oxide or reduced iron together with pulverized coal into a blast furnace through a blast tuyere. CONSTITUTION:Pulverized coal is supplied from a raw material hopper 4 through an intermediate tank 5 into a transport pipe 10 by a pressure feed tank 6, and is blown into a blast furnace 1 through a blowing nozzle 11. At the same time, iron oxide or reduced iron is blown from the hopper 7 into the furnace through the nozzle 11 of the tuyere 3 via an intermediate tank 8, a pressure feed tank 9, and the pipe 10. The iron oxide or reduced iron to be used are ground in such a way that the contents of fine particles of about <=100meshes are similarly as the pulverized coal about >=50% and the rate of its blowing is set at about 5-50kg per ton of pig iron while the ordinary rate of blowing of the pulverized coal is about 30-150kg. Thereby, the Si% of the pig iron is reduced promptly without changing the other operation conditions of the blast furnace 1.
JP2096181A 1981-02-17 1981-02-17 Low-Si operation method for blast furnace in pulverized coal injection Expired JPS5856721B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2096181A JPS5856721B2 (en) 1981-02-17 1981-02-17 Low-Si operation method for blast furnace in pulverized coal injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2096181A JPS5856721B2 (en) 1981-02-17 1981-02-17 Low-Si operation method for blast furnace in pulverized coal injection

Publications (2)

Publication Number Publication Date
JPS57137402A true JPS57137402A (en) 1982-08-25
JPS5856721B2 JPS5856721B2 (en) 1983-12-16

Family

ID=12041763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2096181A Expired JPS5856721B2 (en) 1981-02-17 1981-02-17 Low-Si operation method for blast furnace in pulverized coal injection

Country Status (1)

Country Link
JP (1) JPS5856721B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61266507A (en) * 1985-05-21 1986-11-26 Kawasaki Steel Corp Method for transporting granular particle to be blown in to blast furnace
WO2022049780A1 (en) * 2020-09-03 2022-03-10 株式会社神戸製鋼所 Pig iron production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61266507A (en) * 1985-05-21 1986-11-26 Kawasaki Steel Corp Method for transporting granular particle to be blown in to blast furnace
WO2022049780A1 (en) * 2020-09-03 2022-03-10 株式会社神戸製鋼所 Pig iron production method

Also Published As

Publication number Publication date
JPS5856721B2 (en) 1983-12-16

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