热轧带钢超快速冷却系统智能化控制策略研究  

Research on intelligentize control strategy for ultra-fast cooling in hot rolled strip

作　　者：李振垒[1] 陈冬 袁国[1] 尹锋 曹利芹 王国栋[1] LI Zhen-lei;CHEN Dong;YUAN Guo;YIN Feng;CAO Li-qin;WANG Guo-dong(State Key Lab.of Rolling and Automation,Northeastern University,Shenyang 110819,China;Jiangsu Shagang Group Co.,Ltd.,Zhangjiagang 215625,China;Jingye Group,Shijiazhuang 050400,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]江苏沙钢集管有限公司,江苏张家港215625 [3]敬业集团,河北石家庄050400

出　　处：《轧钢》2019年第6期69-73,92,共6页Steel Rolling

基　　金：“十二五”国家科技支撑计划资助项目(2012BAF04B01);国家自然科学基金青年科学基金资助项目(51804074).

摘　　要：超快速冷却技术因具有冷却强度高、冷却均匀性好等优点,已经成为弥补热轧带钢轧后冷却能力不足的最有效手段。但在应用过程中,带钢运行速度具有时变性,变化规律差别大,同时受轧后冷却段长度短及布置特点限制,使轧后冷却工艺温度精度控制难度增大。结合国内某现场轧后冷却系统特点,对影响轧后冷却工艺温度精度的因素进行了研究,揭示了关键因素对工艺温度精度的影响规律;首次将中间温度引入计算过程,开发了超快速冷却系统多阶计算修正智能化控制策略,结合轧制生产过程中的历史数据规律,引入数据挖掘技术,减少了上游工序工艺波动对下游工艺控制的遗传性,实现了对轧后冷却工艺温度的精确控制。现场应用表明,该控制策略增强了系统运行稳定性,卷取温度命中率提高了近3%~5%,为产品的开发及批量生产提供了技术保证。For the characteristics of high cooling strength and strong cooling uniformity,ultra-fast cooling technology has been to the most effective method to make up the cooling capacity of hot rolled strip cooling after rolling.However,during the application process,time-dependent strip velocity,big difference variation,at the same time limited by the length of the cooling section after rolling and layout characteristics,which increased the difficulty of control accuracy cooling temperature after rolling.In this paper,combined with a domestic production line cooling system characteristics,the factors affecting the temperature accuracy of the cooling after rolling were studied,the influence of key factors on temperature accuracy was revealed.The intermediate temperature was first introduced into the calculation process,intelligent control strategy for multi-stage calculation and correction of ultra-fast cooling system was developed.Combined with the historical data of the rolling process,the fluctuations of upstream process on the downstream process control heredity was decreased.The precise controlling cooling temperature after rolling was improved.Industrial applications show that the stability of system is enhanced,the hit rate of CT is increased by 3%-5%,and the technical assurance for production development and batch production was provided.

关 键 词：热轧带钢 超快速冷却 智能化控制 数据挖掘 控制策略 

分 类 号：TG335.56[金属学及工艺—金属压力加工]