Improving Control Accuracy of Steel Plate Temperature by Accelerated Cooling with Columnar Water Jets

摘要

The amount of cooling water, which affects the heat transfer characteristics, and the height of residual water on the steel plate surface, the height that changes in accordance with the steel plate size, were modeled for the accelerated cooling of steel plates with cylindrically arranged multi jet. In addition, the heat transfer characteristics associated with the height of residual water were investigated by laboratory experiments to model the heat transfer coefficient, which is an index of heat transfer characteristics. Furthermore, the heat transfer coefficient model was optimized by the actual temperatures measured at multi-points on a steel plate in an actual machine, which enabled the accurate prediction of the plate temperature. A water flow rate control function was newly developed on the basis of the temperature prediction results and was introduced into the actual machine, which improved the accuracy of the plate temperature control.