Abstract
In the hot strip mill, the quality of the strip greatly depends on the cooling process between the last stand in the finishing mill and the coilers. Therefore, it is important to carefully control the temperature in the cooling process to regulate the quality of the steel. To realize high temperature accuracy, a new control system for run-out table cooling has been developed. The features of the new control system are as follows: (i) Newly developed feedback control using no vernier banks, which is constructed by using the dynamic control function. (ii) Newly developed dynamic control of cooling pattern, which achieves aimed cooling process during acceleration/deceleration of the strip on the run-out table. This system has been in operation successfully since July 2004 at Kashima Steel Works and improved the accuracy of coiling temperature considerably.
