| 摘要 |
PURPOSE:To manufacture efficiently a non-side hot-dipped steel plate of superior quality, by passing a steel plate coated with a hot dipping inhibitor on one side through an annealing furnace heated to a higher temp. than the set temp. in regular baking work to bake the inhibitor and by dipping the steel plate in a hot dipping vessel. CONSTITUTION:At the beginning of line operation, the amount 19' of gaseous fuel to be fed to an annealing furnace is increased as compared to the conventional amount 19 of gaseous fuel to make the furnace temp. 20' higher than the conventional furnace temp. 20. At the time 21 when a steel plate coated with a hot dipping inhibitor on one side begins to enter the annealing furnace, the furnace temp. t21 is made higher than the set furnace temp. tN in regular baking work. Conventional under baking due to a drop in the furnace temp. is prevented, and the productivity and yield can be improved. |
