JPS55110710A - Reduction of air blowing during reduced scale blowing-down operation of blast furnace - Google Patents

Reduction of air blowing during reduced scale blowing-down operation of blast furnace

Info

Publication number
JPS55110710A
JPS55110710A JP1801879A JP1801879A JPS55110710A JP S55110710 A JPS55110710 A JP S55110710A JP 1801879 A JP1801879 A JP 1801879A JP 1801879 A JP1801879 A JP 1801879A JP S55110710 A JPS55110710 A JP S55110710A
Authority
JP
Japan
Prior art keywords
blowing
reduced scale
blast furnace
index
air blowing
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
JP1801879A
Other languages
Japanese (ja)
Other versions
JPS6160124B2 (en
Inventor
Michiharu Hatano
Koichi Kurita
Hideyuki Yamaoka
Teruhisa Shimoda
Junji Kariya
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP1801879A priority Critical patent/JPS55110710A/en
Publication of JPS55110710A publication Critical patent/JPS55110710A/en
Publication of JPS6160124B2 publication Critical patent/JPS6160124B2/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

Abstract

PURPOSE:To stabilize reduced scale operation by preventing the blowing-through by the procedure in which a furnace index of blowing-through is obtained from blast furnace model during reduced scale blowing-down operation, a limited air blowing at which the index does not exceed a fixed value is obtained for each reduced scale process, and then air sending is performed. CONSTITUTION:By using a model to grasp the dynamic behavior of blast furnace during reduced scale operation, the furnace distribution of blowing-through index is obtained from a balance between pressure loss and charging load at each portion of furnace, and then limited air blowing amount at which the blowing-through index does not exceed a fixed value is obtained for each reduced scale process. Then, air blowing is made at less than the limited air blowing amount obtained according to reduced scale operation condition. Thus, smooth reduced scale blowing-down operation can be performed without causing blowing-through of air in the final period of operation.
JP1801879A 1979-02-19 1979-02-19 Reduction of air blowing during reduced scale blowing-down operation of blast furnace Granted JPS55110710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1801879A JPS55110710A (en) 1979-02-19 1979-02-19 Reduction of air blowing during reduced scale blowing-down operation of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1801879A JPS55110710A (en) 1979-02-19 1979-02-19 Reduction of air blowing during reduced scale blowing-down operation of blast furnace

Publications (2)

Publication Number Publication Date
JPS55110710A true JPS55110710A (en) 1980-08-26
JPS6160124B2 JPS6160124B2 (en) 1986-12-19

Family

ID=11959920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1801879A Granted JPS55110710A (en) 1979-02-19 1979-02-19 Reduction of air blowing during reduced scale blowing-down operation of blast furnace

Country Status (1)

Country Link
JP (1) JPS55110710A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007254897A (en) * 2007-06-04 2007-10-04 Jfe Steel Kk Method for lowered level operation in blast furnace
JP2011144442A (en) * 2010-01-18 2011-07-28 Nippon Steel Corp Method for blow-down operation of blast furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007254897A (en) * 2007-06-04 2007-10-04 Jfe Steel Kk Method for lowered level operation in blast furnace
JP2011144442A (en) * 2010-01-18 2011-07-28 Nippon Steel Corp Method for blow-down operation of blast furnace

Also Published As

Publication number Publication date
JPS6160124B2 (en) 1986-12-19

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