连铸板坯动态二冷控制系统开发与应用

Development and Application of Dynamic Secondary Cooling Control System on Continuous Casting Slab

摘要: 在合理假设的基础上，建立了连铸板坯一维传热跟踪模型，连铸坯表面温度和凝固坯壳厚度验证表明，模型计算精度可以满足在线应用的需要。以热跟踪模型为基础，结合连铸坯表面温度控制目标制定，采用增量PID算法建立了二冷水流量调整模型，采用模块化设计，开发了连铸板坯二冷动态控制系统。应用结果表明，二冷水量可根据拉速变化迅速调整，实现了连铸板坯表面温度的稳定控制。

Abstract: A one-dimensional heat tracing model of continuous casting slab was built based on the reasonable assumption. The validation results of the slab surface temperature and the solidified shell thickness show that, the calculation accuracy of the built model is high enough which can meet the requirement of online application. Based on the heat tracing model, a model of adjustment of sec-ondary cooling water flow rate was built via increment PID algorithm combined with planning of the control objectives of slab surface temperature, and the dynamic secondary cooling control system was established via modularity designing. Application results showed that, the flow rate of secondary cooling water can be adjusted rapidly with the casting speed, and the slab surface tem-perature can be controlled stably.