改善多流中间包均匀性研究

Study on improvement in uniformity of a multi-strand tundish

采用水模型的方法,以一个七机七流中间包为原型,建立1∶2.5的水模型系统,对多流中间包各流的均匀性进行了分析.结果表明:多流中间包在无控流装置下,不能保证各流的均匀性,各流差异性极大;原型中间包各流均匀性较差,且死区比例高,达到45.5%;控流装置的重要性依次为U型挡墙>稳流器>梯形挡墙;优化后各流均匀性良好,死区比例由原来45.5%降低到平均23.1%,在现场应用取得很好效果.

The uniformity of a 7-stream tundish in a steel plant was studied by establishing a water model with the scale of 1∶ 2. 5.Experimental results show that the multi-stream tundish has poor uniformity with no flow control devices and the uniformity difference of each stream is obvious. The liquid steel flow of each stream in the tundish before optimization has a high dead zone proportion of45. 5%. It is found that the importance of flow control devices is U-type dams > turbulence suppressors > trapezium dams. After optimization,flow control devices have good applications in the steel plant,the uniformity of each stream improves greatly,and the proportion of the dead zone decreases to 23. 1% from 45. 5%.