热轧板带钢的超快速冷却控制系统

Ultra-fast Cooling Control System for Hot Rolling Strip

对热轧板带钢超快速冷却设备作了简要介绍.通过带钢轧制过程参数耦合控制及冷却水精度设定,使冷却水流量快速调节实现目标值±0.5m3/h的偏差.根据热轧生产工艺制度要求,对超快速冷却过程建立温度计算数学模型.通过控制系统功能间的最优化设计,采取合理的冷却策略,使中间温度及卷取温度控制精度达到目标值±15℃范围之内,使热轧板带钢超快速冷却工艺逐步稳定合理.系统投入使用后,具有高稳定性、高可靠性、高温度命中率,显著提高了带钢产品的质量和性能.

The ultra-fast cooling equipment of hot roiling strip was introduced briefly. The deviation of ＋ 0.5 m3/h of control target for cooling water flux was achieved quickly by coupling controlling the strip rolling parameters and setting cooling water precision. A calculation mathematical model of ultra-fast cooling system was constructed according to the hot rolling process requirement. The control accuracy of the intermediate and coil temperature can be limited within ±15℃ of the target values by coupling with the optimal design of the system function and reasonable cooling strategy,. Therefore, the ultra-fast cooling process of hot rolling strip becomes stable and reasonable. The field practice results showed that the system has high stability, reliability and high temperature hit rate, and it can improve significantly the quality and performance of the steels.