| 摘要 |
PURPOSE:To provide a titled controller which can minimize the sum of fuel consumptions in the heat holding stage and the reheating stage by controlling an ingot heating furnace at the optimum heat patterns in accordance with the outputs of a means for setting the temp. of said furnace in the heat holding stage and a calculating means for determining the economical heating time of the furnace. CONSTITUTION:When te dwell time of mills and the intended time for discharging after restoration are set, an arithmetic device 13 for the set value of the furnace temp. in the heat holding stage is excited and the current average temp. of an ingot 1 is determined tentatively as a target temp. for heat holding. The most economical heating time and min. fuel consumption for heating the ingot 1 up to the target temp. for discharging in its average temp. in the reheating stage are determined by using a generator 3 for furnace temp. models, a generator 4 for heat transfer models of ingot and a calculator 5. Thereafter, the set temp. of the furnace temp. in the heat holding stage and fuel consumption at which the fuel consumption is min. when the ingot 1 attains the target temp. for heat holding upon lapse of the required heat holding time are determined with the generators 3, 4 and the device 5. According to this optimum controller for ingot heating furnaces, the total fuel consumption in the heat holding stage and the reheating stage is minimized even when the ingot is put in the heat holding state for a long time in the heating furnace. |
