| 摘要 |
PURPOSE:To make contribution to the improvement in the size and quality of products, by calculating and setting the temp. in the transverse direction of a heating furnace from the temp. of the material to be heated at the present temp., the target temp. of the material to be heated after a specified time and the prescribed temp. gradient in the longitudinal direction of the material to be heated. CONSTITUTION:Two units of control devices 61, 62 for furnace temp. are provided in the transverse direction of a furnace. When a set furnace temp. thetag1REF is given, a burner 21 is operated by a thermometer 51, a subtractor 91 and the device 61, and the temp. in the furnace is maintained at thetag1. When a set furnace temp. thetag2REF is given, a burner 22 is operated by a thermometer 52, a subtractor 92 and the device 62 and the furnace temp. is maintained at thetag2. Therefore, a furnace temp. gradient can be made in the transverse direction of the furnace. Thereupon, the above-described thetag1REF, thetag2REF are calculated and set from the temp. thetag1 of a slab 1 at the present time, the target temp. thetag2 of the slab 1 after a specified time and the prescribed temp. gradient DELTAthetaM in the longitudinal direction of the slab 1. |
