| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for turning a material at a suitable position in a furnace in order to achieve the decrease of uneven heat at the upper and the lower parts of a material to be heated while restraining the lowering of a furnace capacity and the increase of an equipment cost to the minimum in a walking hearth type heating furnace. SOLUTION: In the limited range of at least either one of a moving furnace hearth or a fixed furnace hearth in this walking hearth type heating furnace for a steel material, one pair or more of slopes 2 rolling down a round cross sectional material with the material dead wt., are formed and a furnace hearth in a range except the slopes is almost flattened. The shape of the slope is formed so that the length B2 in the slope horizontal direction of a side where the material steps over, is got over even in the shortest carrying pitch. Further, the length B1 of the slope on which the material rolls down, is made so as to obtain the necessary material rotation per one time. Then, the material is rolled down by laying the slope at each one time of carrying. In this way, even in the case that the interval of the material is not specially widened, the material is uniformly heated from the all surfaces in order according to the turning to decrease the uneven heat at the upper and the lower parts.
|
