JPS6465218A - Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation - Google Patents

Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation

Info

Publication number
JPS6465218A
JPS6465218A JP22098587A JP22098587A JPS6465218A JP S6465218 A JPS6465218 A JP S6465218A JP 22098587 A JP22098587 A JP 22098587A JP 22098587 A JP22098587 A JP 22098587A JP S6465218 A JPS6465218 A JP S6465218A
Authority
JP
Japan
Prior art keywords
reducing agents
solid reducing
axial center
center part
furnace bottom
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
JP22098587A
Other languages
Japanese (ja)
Other versions
JPH058248B2 (en
Inventor
Shoken Shimizu
Yoshio Kimura
Ryuichi Hori
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 JP22098587A priority Critical patent/JPS6465218A/en
Priority to CA000576240A priority patent/CA1338098C/en
Priority to DE3889399T priority patent/DE3889399T2/en
Priority to EP88114291A priority patent/EP0306026B1/en
Priority to AU21792/88A priority patent/AU613399C/en
Priority to US07/239,655 priority patent/US4963186A/en
Publication of JPS6465218A publication Critical patent/JPS6465218A/en
Publication of JPH058248B2 publication Critical patent/JPH058248B2/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
    • C21B5/008—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 adequately control the molten iron and molten slag at a furnace bottom by charging solid reducing agents at arbitrary frequencies to the axial center part of ore layers are controlling the charging ratio of the reducing agents in such a manner that the charging ratio of the reducing agents and the quantity of fluctuation in furnace bottom temp. satisfy the specific equation. CONSTITUTION:The solid reducing agents and ore are alternately charged to the blast furnace from the furnace top to laminate the solid reducing agents and the ore layers. The renewal of the furnace core solid reducing agent layers is controlled by charging the solid reducing agents at arbitrary frequencies to the axial center part of the ore layers or charging the solid reducing agents having good air permeability at arbitrary frequencies to the axial center part of the solid reducing agent layers at this time. The weight ratio of the solid reducing agents to be charged to the axial center part is controlled simultaneously in such a manner as to satisfy the relation between the weight ratio of the solid reducing agents to be charged to the axial center part (weight % to the total charge quantity of the solid reducing agents) and the quantity of fluctuation in furnace bottom temp. In the equation, RWc is the weight ratio of the solid reducing agents to be charged to the axial center part; Ts is the average temp. in the axial center part of the furnace bottom when the charge to the axial center is not operated; DELTAT is the difference between the furnace bottom temp. during the execution of the charge of the solid reducing agents to the axial center part and Ts; DELTAT/Ts is the quantity of fluctuation in furnace bottom temp. The molten iron and molten slag are thereby passed from the central part of the furnace bottom to a tap hole.
JP22098587A 1987-09-03 1987-09-03 Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation Granted JPS6465218A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP22098587A JPS6465218A (en) 1987-09-03 1987-09-03 Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation
CA000576240A CA1338098C (en) 1987-09-03 1988-08-31 Method for operating blast furnace
DE3889399T DE3889399T2 (en) 1987-09-03 1988-09-01 Process for operating a blast furnace.
EP88114291A EP0306026B1 (en) 1987-09-03 1988-09-01 Method for operating blast furnace
AU21792/88A AU613399C (en) 1987-09-03 1988-09-01 Method for operating blast furnace
US07/239,655 US4963186A (en) 1987-09-03 1988-09-02 Method for operating blast furnace by adding solid reducing agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22098587A JPS6465218A (en) 1987-09-03 1987-09-03 Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation

Publications (2)

Publication Number Publication Date
JPS6465218A true JPS6465218A (en) 1989-03-10
JPH058248B2 JPH058248B2 (en) 1993-02-01

Family

ID=16759662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22098587A Granted JPS6465218A (en) 1987-09-03 1987-09-03 Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation

Country Status (1)

Country Link
JP (1) JPS6465218A (en)

Also Published As

Publication number Publication date
JPH058248B2 (en) 1993-02-01

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