| 摘要 |
PURPOSE:To heat a steel slab to a predetermined temp. in a small-sized heating furnace with little heat energy by subjecting the slab to a reciprocating motion with a plurality of rollers. CONSTITUTION:Steel slab 26 heated in combustion furnace 22 for initial heating is conveyed into heating furnace 11 at a high speed by rotation of rollers 23 without being cooled. Furnace 11 is being provided with power-regulable induction heating coils 1-5 and rollers 6-9, and the length is made longer than the total of the slab length and the distance between two rollers by a predetermined length. Slab 26 is subjected to a slow reciprocating motion in furnace 11 by normal and reverse rotations of rollers 6-9. By repeating the motion slab 26 is heated to a predetermined temp. and conveyed into rolling mill 24 with rollers 25 at a high speed without being cooled. By this method slab 26 is heated to the rolling temp. in short-sized heating furnace 11 with superior thermal efficiency. |
