| 摘要 |
PURPOSE:To unify the descaling rate by controlling each operation based on the variation part of plate thickness and plate width in a mechanical scale breaker, the temperature variation part in a mechanical descaler and the variation parts of plate thickness and temperature in a chemical descaler. CONSTITUTION:In a descaling control computer 11, the plate thickness of a coil, the plate width thereof and the average value of temperature data are inputted by a computer 9 for controlling rolling. The descaling passing speed of a steel strip 2[' and operation input set values of the mechanical scale breaker 12, the mechanical descaler 13 and the chemical descaler 14 are calculated from the average value by a fixed interval, the material and specification of said coil and the operation condition of the chemical descaler. Then, set values by a certain fixed interval are inputted respectively to a line controller 15 and an instrumentation controller 16. Further, when a central speed is reduced by the line stop on the inlet and outlet side, a set value for operation input of the chemical descaler in consideration of the scale condition is calculated to be inputted to the instrumentation controller 16. |
