板坯动态二冷增量型PID控制研究

来源期刊：钢铁2011年第1期

论文作者：孙猛 王叶婷 徐磊 沈厚发

文章页码：34 - 38

关键词：动态二冷； 目标温度； 热塑性； 增量型PID控制

Key words：dynamic secondary water cooling； aim temperature； hot ductility； incremental PID control

摘    要：为解决连铸拉速工况变化时因使用一级水表配水控制所引起的铸坯表面温度波动的问题,建立了考虑铸坯纵向导热的板坯传热瞬态模型。通过Gleeble试验获得钢的热塑性,制定了铸坯的目标温度。采用增量型PID控制方法开发了动态二冷控制软件Visual Cast。结果表明:与传统的一级水表相比,当拉速发生变化时Visual Cast能够迅速做出反应,合理调整水量,保持铸坯表面温度不发生剧烈波动,从而保证铸坯质量,满足现场生产要求。

Abstract: A transient heat transfer model with conduction along the casting direction was applied to slab casting in order to decrease the surface temperature fluctuation with the variation of process parameters such casting speed in the traditional water table control.And a dynamic secondary water cooling control system,Visual Cast,was developed by using the incremental PID control algorithm.The slab surface aim temperatures were determined according to the hot ductility of the steel measured by the Gleeble tensile experiment.Compared with the traditional water table method,Visual Cast control system showed higher capability and sensibility in adjustmen of cooling water flowrate to maintain the slab surface temperature when casting speed was changed and it was qualified to be used in the practical production of steel slab.