| 摘要 |
PURPOSE:To prevent generation of defects of a slab by manufacturing a slab having an average sectional temp. not lower than a specific temp. by a continuous casting machine, heating the slab so that its sectional center and both sectional sides have a max. and min. temps., respectively, and edging the slab. CONSTITUTION:A slab having an average sectional temp. of >=1000 deg.C is previously manufactured at a continuous casting stage 2. The slab is charged into a furnace 5 through a transfer table 4 to be heated. In that time, a sectional temp. distribution calculation model part 10 of a combustion controller 9 controls a temp. distribution of the slab in the furnace 5 so that a max. temp. exists in the sectional center and a min. temp. is detected on both sides. Then, the slab is edged by edger mills 7, 8. Defect generation on the slab is prevented because the max. and min. temps. are positioned inside the section. |
