【作者】 王国新； 韩占光； 钱宏智； 余兵； 张家泉； 王玉昌； 樊精彪； 兰岳光； 麻晓光； 赵殿清；

【Author】 Wang Guoxin Han Zhanguang Qian Hongzhi Zhang Jiaquan (University of Science and Technology Beijing,Beijing 100083) Wang Yuchang Fan Jingbiao Lan Yueguang Ma Xiaoguang Zhao Dianqing (Baoutou Iron &Steel Co.,Baotou 014010)

【机构】 北京科技大学； 包头钢铁集团炼钢厂；

【摘要】 本文介绍国内最新开发的大方坯连铸动态二冷与动态轻压下控制模型及其工业应用效果。该模型将铸流离散成许多切片,依据传热学理论与合理假设对每个切片建立传热微分方程；通过用有限差分法求解各切片传热微分方程,动态计算各切片的内部温度曲线,从而实现对铸坯实时温度场的动态跟踪；结合目标表面温度控制法与轻压下理论实现了大方坯连铸的动态二冷与动态轻压下控制。该控制模型已在包钢5号大方坯连铸机上线应用, 对比试验表明铸坯内质得到了明显提升。更多还原

【Abstract】 The newly developed dynamic secondary cooling and dynamic soft reduction control model for bloom caster has been introduced along with its industry application.In this model,the strand is divided into a lot of small slices,Based on the heat transfer theory and reasonable hypothesis,a differential equation of heat transfer is established for each slice.The temperature profile,which describes the temperature from the surface till the centre, is calculated cyclically by solving the equation using finite difference method,and the real-time temperature field for the dynamic tracking of the strand is realized.Combining with the target surface temperature strategy and the soft reduction theory,dynamic control for secondary cooling and soft reduction of bloom continuous casting is achieved.The control model has been put into operation on No 5 bloom caster of Baotou Steel,and the comparative experiment shows that inner quality of bloom has been obviously improved.更多还原