Temperature Control System Modeling and Simulation of Finishing Mill

Abstract

The precise control for the product strip temperature is one of the effective approaches to promote the quality in the finish rolling production. The paper presents the basic features of the control strategies, temperature feedforward control and temperature feedback control for the strip temperature control system of Baosteel 2050mm finish rolling in details. Considering the strip thickness, a differential heat transfer model is proposed to calculate the heat conduction of the strip thickness direction of each node and attain multi-stand and finishing rolling exit temperature. In addition, the proposed method combined with the model prediction and feedback control, the feedforward control to adjust the rolling speed to ensure the strip head temperature hit rate dynamically adjusted using feedback control regulating water temperature of the strip full-length. The application results show that the temperature difference model prediction and feedback control accuracy is significantly improved than the original 2050mm temperature system.