| 摘要 |
PURPOSE:To heat rear slabs of different heating loads in good precision, by previously varying furnace temp. of the objective furnace zone required by the objective slab to be heated by using furnace temp. of furnace zone at extracting side as reference. CONSTITUTION:In case high heat load slabs Si-Si+n such as that of large thickness section are charged in order behind low heat low slabs S1-Si-1 such as that of small thickness sections, these are treated as follows. Namely, at the timing when the slabs Si-Si+n reach a check point 2 set arbitrarily in zone (i-1) before arrival to zone 1 of a heating furnace 1, furnace temp. to the slabs Si-Si+n in zone 1 is previously designated. Command for lowering or rising furnace temp. is given to burner controller to control actual furnace temp. according to the required furnace temp., and timing of responsiveness of furnace temp., mainly furnace wall temp. is corrected. In this way, various sized slabs of different heating loads charged in the furnace can be heated to the aimed extraction temp. |
