JPS55107706A - Operating method of blast furnace - Google Patents

Operating method of blast furnace

Info

Publication number
JPS55107706A
JPS55107706A JP1436779A JP1436779A JPS55107706A JP S55107706 A JPS55107706 A JP S55107706A JP 1436779 A JP1436779 A JP 1436779A JP 1436779 A JP1436779 A JP 1436779A JP S55107706 A JPS55107706 A JP S55107706A
Authority
JP
Japan
Prior art keywords
blast
blast furnace
factors
formula
calculated
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
JP1436779A
Other languages
Japanese (ja)
Other versions
JPS5747725B2 (en
Inventor
Kenji Tamura
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 JP1436779A priority Critical patent/JPS55107706A/en
Publication of JPS55107706A publication Critical patent/JPS55107706A/en
Publication of JPS5747725B2 publication Critical patent/JPS5747725B2/ja
Granted 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
    • C21B5/006—Automatically controlling the process

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 control the Si content in pig iron to a target value by calculating the melt dropping distance Hc of the charged iron ore from various operating factors, SiO2 activity from slag composition and CO partial pressure from blast factors, determining Si concentration estimation formula from these data and controlling operation factors, in blast furnace operation. CONSTITUTION:In blast furnace operation, the melt dropping distance Hc being the distance between the both levels of the fusion band root part of the ore charged into the blast furnace and tuyere receway is calculated from operation index factors such as tapping ratio gamma, coke ratio, heavy oil ratio, flame temperature, molten iron temperature Tp and slag composition. Also, the activity Asio2 of SiO2 in the slag is calculated from the blast furnace slag composition. Further from the rate of blast into blast furnace, blast humidity, oxygen flow rate, heavy oil flow rate and blast pressure the CO partial pressure PCO in combustion zone, are calculated and based on these values, the formula of the Si concentration in the molten iron is determined by formula (1). One or a plurality of the operation index and blast factors of the blast furnace are controlled so that the Si in this formula becomes of a target value.
JP1436779A 1979-02-13 1979-02-13 Operating method of blast furnace Granted JPS55107706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1436779A JPS55107706A (en) 1979-02-13 1979-02-13 Operating method of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1436779A JPS55107706A (en) 1979-02-13 1979-02-13 Operating method of blast furnace

Publications (2)

Publication Number Publication Date
JPS55107706A true JPS55107706A (en) 1980-08-19
JPS5747725B2 JPS5747725B2 (en) 1982-10-12

Family

ID=11859072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1436779A Granted JPS55107706A (en) 1979-02-13 1979-02-13 Operating method of blast furnace

Country Status (1)

Country Link
JP (1) JPS55107706A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173310A (en) * 1984-02-15 1985-09-06 Mitsubishi Motors Corp Combustion chamber structure of diesel engine

Also Published As

Publication number Publication date
JPS5747725B2 (en) 1982-10-12

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