| 摘要 |
<p>Steel slabs (20, 21) are heated in a reheating furnace before the hot rolling. A final zone (14) is separated from a direct heating zone (12, 13) and protective gas is conveyed to the final zone in conduits (23, 24) that lead through the direct heating zone so that the protective gas is heated before being released into the final zone. In the final zone, there are radiation heaters (22, 30) for the final heating and temperature equalisation of the slabs. In this way, the formation of scale is reduced and the profit of the scale reduction is much greater than the additional cost. This is true in particular for certain alloyed steel such as high speed cutting steel.</p> |
