JPS55122829A - Metal strip temperature controlling method in direct firing type gas combustion system continuously annealing furnace - Google Patents

Metal strip temperature controlling method in direct firing type gas combustion system continuously annealing furnace

Info

Publication number
JPS55122829A
JPS55122829A JP3017779A JP3017779A JPS55122829A JP S55122829 A JPS55122829 A JP S55122829A JP 3017779 A JP3017779 A JP 3017779A JP 3017779 A JP3017779 A JP 3017779A JP S55122829 A JPS55122829 A JP S55122829A
Authority
JP
Japan
Prior art keywords
flow rate
control
strip
temp
feedforward control
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
JP3017779A
Other languages
Japanese (ja)
Other versions
JPS5742694B2 (en
Inventor
Kazuo Maehara
Kenji Kasai
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 JP3017779A priority Critical patent/JPS55122829A/en
Publication of JPS55122829A publication Critical patent/JPS55122829A/en
Publication of JPS5742694B2 publication Critical patent/JPS5742694B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To enable accurate control of a strip annealing temp. independently of strip size and quality changes by making combined use of feedforward control and feedback control in a direct firing type gas combustion system continuously annealing furnace. CONSTITUTION:By feedforward control the flow rate of fuel gas required to maintain the desired strip temp. at the outlet side of an annealing furnace is calculated and set according to a total heat absorption rate estimating equation when a strip size or quality change point reaches the inlet side of the furnace. By feedfack control the set value of the fuel gas flow rate in feedforward control is corrected on the basis of the actual values of total heat absorption rate calculated from measured values of furnace temp., strip temp. and conveying speed every fixed time after the above-mentioned feedforward control. On the basis of the actual values of the rate the estimating equation is corrected every feedforward control, and every feedback control the flow rate of gas required is corrected according to the difference between the flow rate of gas calculated on the basis of the actual values and the flow rate of gas measured.
JP3017779A 1979-03-15 1979-03-15 Metal strip temperature controlling method in direct firing type gas combustion system continuously annealing furnace Granted JPS55122829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3017779A JPS55122829A (en) 1979-03-15 1979-03-15 Metal strip temperature controlling method in direct firing type gas combustion system continuously annealing furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3017779A JPS55122829A (en) 1979-03-15 1979-03-15 Metal strip temperature controlling method in direct firing type gas combustion system continuously annealing furnace

Publications (2)

Publication Number Publication Date
JPS55122829A true JPS55122829A (en) 1980-09-20
JPS5742694B2 JPS5742694B2 (en) 1982-09-10

Family

ID=12296466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3017779A Granted JPS55122829A (en) 1979-03-15 1979-03-15 Metal strip temperature controlling method in direct firing type gas combustion system continuously annealing furnace

Country Status (1)

Country Link
JP (1) JPS55122829A (en)

Also Published As

Publication number Publication date
JPS5742694B2 (en) 1982-09-10

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