调节轧制速度和水流量进行终轧温度控制的比较

Comparison of the Rolling Speed and Water Flow Adjusting on the Finishing Rolling Temperature Control

结合国内某热轧带钢厂终轧温度控制模型的调试过程,分别介绍了通过调节水量和调节轧制速度进行终轧温度控制的原理;对比了轧制典型产品时采用上述两种手段调节终轧温度的轧制速度实测曲线、水量调节曲线和终轧温度实测曲线,探讨了产生不同终轧温度控制效果的原因;结合轧后冷却样本跟踪原理,分析了调节速度时对于下游轧后冷却控制过程的影响.研究结果表明:采用调节轧制速度手段的终轧温度控制精度略高;采用调节机架间水量手段时轧制速度曲线更平滑,有利于轧后冷却过程控制.

Based on the commission of the finishing rolling temperature control model of some domestic hot strip rolled mill,the principles of the temperature control by using rolling speed and water flow adjusting were introduced respectively.The measured curves of the rolling speed,water flow adjusting and finishing temperature by using the two means as mentioned previously on rolling typical products were compared.Furthermore,the difference of finishing temperatures controlled by using different control means were discussed in detail.At the same time,referring to the tracking principle of cooling control model on run-out table,the effect of rolling speed adjusting on the following cooling control after rolling was analyzed.The results showed that more accurate finishing rolling temperature control was obtained by the rolling speed adjusting method than by the water flow adjusting method,however,water flow adjusting helped to get smooth rolling speed curve and was beneficial to promoting the cooling control after rolling.