Title:
CONTINUOUS STEEL MATERIAL HEATING FURNACE, AIR RATIO CONTROL METHOD THEREOF, AND MANUFACTURING METHOD OF STEEL MATERIAL
Document Type and Number:
Japanese Patent JP2021103074
Kind Code:
A
Abstract:
To provide a continuous steel material heating furnace provided with heat accumulation type switching combustion burners in a combustion control band, capable of controlling an air ratio for every combustion control band at an appropriate air ratio with high accuracy, an air ratio control method of the heating furnace, and a manufacturing method of steel material.SOLUTION: A continuous steel material heating furnace 1 has: an oxygen concentration detector 28 for suction exhaust gas and a flow rate detector 35 for suction exhaust gas provided at a suction exhaust gas main duct 27 for collecting the suction exhaust gases of combustion control bands 3, 4 and 5 and 6 provided with heat accumulating type switching combustion burners 10; an oxygen concentration detector 9 for furnace tail exhaust gas and a flow rate detector 34 for furnace tail exhaust gas provided at a downstream part from the combustion control band 3 being the most downstream side in the exhaust gas flow of a furnace body 2; and an air ratio control section 30 controlling the air ratio for every combustion control band, on the basis of a detection value of the oxygen concentration detector 28 for suction exhaust gas, a detection value of the flow rate detector 35 for suction exhaust gas, a detection value of the oxygen concentration detector 9 for furnace tail exhaust gas, and a detection value of the flow rate detector 34 for furnace tail exhaust gas.SELECTED DRAWING: Figure 1
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Inventors:
AKAZAWA TAKAHIRO
NISHIMURA TAKASHI
NISHIMURA TAKASHI
Application Number:
JP2020182143A
Publication Date:
July 15, 2021
Filing Date:
October 30, 2020
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
F27B9/40; F23N5/00; F27D19/00; F27D21/00
Domestic Patent References:
| JP2007285564A | 2007-11-01 | |||
| JP2019158268A | 2019-09-19 | |||
| JPS58164925A | 1983-09-29 |
Attorney, Agent or Firm:
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka
Tetsuya Mori
Ichi Hirose
Toru Miyasaka
Tetsuya Mori