| 摘要 |
PURPOSE:To always maintain a prescribed descaling state by calculating and setting at every prescribed time a projecting pressure and a strip passing speed of a wet type blast device of the pre-stage, and also calculating and setting a projecting pressure of a blast device of the post-stage. CONSTITUTION:A wet type blast device 2-1 of the pre-stage and a wet type blast device 2-2 of the post-stage are placed. In a stationary state, a projecting pressure and a strip passing speed of the wet type blast device 2-1 of the pre-stage at the time of deceleration or acceleration are calculated and set at every prescribed time by using the projecting pressure and the strip passing speed, and the maximum increase and decrease quantitites per prescribed time of the projecting pressure, of the wet type blast device 2-1 of the pre-stage. Subsequently, based on the set strip passing speed, a projecting pressure of the wet type blast device of the post-stage for obtaining a prescribed descaling state is calculated and set. |
