中间包包型优化的数值模拟及生产应用

来源期刊：钢铁2011年第2期

论文作者：薄凤华 王凤琴 张利君

文章页码：26 - 29

关键词：中间包； RTD曲线； 停留时间； 数值模拟； 包型优化

Key words：tundish； RTD curve； residence time； numerical simulation； type optimization

摘    要：中间包包型对钢液流动有重要影响,进而影响中间包的冶金效果。利用数学模拟方法,以钢液停留时间分布曲线(RTD曲线)为评判标准,对某钢厂的中间包包型进行了优化改造,优化后出口浓度最大时间延长了200s,钢液活塞区比例由39.3%增加至69.6%,死区比例由10.11%降至4.77%,且铸余减少3.5t;包型优化后的大样电解夹杂物含量减少了72.35%。该包型于2008年12月开始在某钢厂稳定使用,提高了铸坯质量,节省了生产成本,为该钢厂创造了显著的效益。

Abstract: Tundish type has an important influence on the steel fluid flow in tundish,and furtherly influences metallurgy effect of the tundish.By the evaluation criterion of the residence time of fluid in tundish,the tundish structure of a production plant was optimized by numerical simulation method.The results show that the volume fraction of piston flow region is increased from 39.3% to 69.6%,and the dead region is decreased from 10.11% to 4.77%,and the biggest denseness time of outlet is prolonged 200 s,and casting remnant decreases 3.5 t.The total quantity of macro-inclusion is decreased by 72.35%.The optimized tundish has been used stably in this steelmaking plant since Dec 2008.The result shows that metallurgy effect of the tundish is improved greatly and production cost is cut down and distinct benefit is created for the plant.