| 摘要 |
PURPOSE:To efficiently feed the metallic short size hot bloom with little fluctuation of temperatures, by cutting the bloom into a desired length while heating or warming the bloom. CONSTITUTION:The long size square bloom is charged into the bloom heating furnace 1 as shown by the arrow A1, and is heated to temperatures suitable for the hot rolling pass; after that, the bloom in pushed out as shown by the arrow A2, and is rolled by one or more breakdown mills to reduce the section area; hereby, the square sectioned bloom is prepared. Next, this bloom is charged into the tunnel type heating furnace 3; while the bloom is cut by the cutter 4 into a length required by the following rolling pass, a part or whole of the trailing part is heated or warmed by the furnace 3. The length L of the tunnel type heating furnace 3 is desirable to be about 1.5-2 times of the bloom's total length. Hereby, next bloom is completely inserted into the furnace 3, so that the longitudinal irregularity of cooling or heating for the bloom is prevented. |
