JPS55100906A - Operation of blast furnace - Google Patents

Operation of blast furnace

Info

Publication number
JPS55100906A
JPS55100906A JP738079A JP738079A JPS55100906A JP S55100906 A JPS55100906 A JP S55100906A JP 738079 A JP738079 A JP 738079A JP 738079 A JP738079 A JP 738079A JP S55100906 A JPS55100906 A JP S55100906A
Authority
JP
Japan
Prior art keywords
factors
ore
theta
furnace
blast furnace
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
JP738079A
Other languages
Japanese (ja)
Inventor
Isao Fujita
Nobuyuki Imanishi
Tadao Tsutaya
Makoto Watanabe
Takao Kawai
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP738079A priority Critical patent/JPS55100906A/en
Publication of JPS55100906A publication Critical patent/JPS55100906A/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
    • C21B5/008—Composition or distribution of the charge

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 carry out stabilizing operation at a low coke ratio by balancing three factors of an oxygen amt. charged per min. per unit volume of a blast furnace, a charging ratio of ore to coke and a rate of the reduction of the ore by a method wherein crushed ores or deformed pellets are used when the condition of the blast furnace is controlled by the three factors. CONSTITUTION:An oxygen amt. X charged per min. per unit volume of a blast furnace, a charging ratio Y of ore to coke and an average JIS reduction rate of the ore are determined as the factors of furnace heat balance variation, the operation being influenced by the factors. The three factors are composed of three parallel axes, and X, Y and Z valued are scaled. Lines l1 and l2 are drawn between the corresponding values to the factors X, Y and between the corresponding values to the factors Y, Z to form angles theta1, theta2 to the horizontal line. There is a furnace heat stabilizing zone where theta is from 150-210 deg.C when theta=theta1+theta2+180 deg.. In order to stabilize the furnace heat by decreasing the O2-charging value X, increasing the low coke ratio Y and setting theta within the above range, the ores are crushed or deformed pellets are used to increase Z value. By controlling theta within the desired range, the condition of the furnace can be stabilized.
JP738079A 1979-01-24 1979-01-24 Operation of blast furnace Pending JPS55100906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP738079A JPS55100906A (en) 1979-01-24 1979-01-24 Operation of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP738079A JPS55100906A (en) 1979-01-24 1979-01-24 Operation of blast furnace

Publications (1)

Publication Number Publication Date
JPS55100906A true JPS55100906A (en) 1980-08-01

Family

ID=11664328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP738079A Pending JPS55100906A (en) 1979-01-24 1979-01-24 Operation of blast furnace

Country Status (1)

Country Link
JP (1) JPS55100906A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014224286A (en) * 2013-05-15 2014-12-04 新日鐵住金株式会社 Method for operating blast furnace

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919174Y1 (en) * 1970-03-27 1974-05-22
JPS5170025A (en) * 1974-12-12 1976-06-17 Kosei Iwasaki OSHIDA SHISHIKIHITSUKIGU

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919174Y1 (en) * 1970-03-27 1974-05-22
JPS5170025A (en) * 1974-12-12 1976-06-17 Kosei Iwasaki OSHIDA SHISHIKIHITSUKIGU

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014224286A (en) * 2013-05-15 2014-12-04 新日鐵住金株式会社 Method for operating blast furnace

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