三流大方坯中间包控流装置优化的水模拟研究  

Study on Water Modeling for Optimizing Flow Control Device in Tundish for Three-strand Bloom Casting

作　　者：于卓颖[1] 孙彦辉[1] 李时伟[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁钒钛》2013年第1期54-57,68,共5页Iron Steel Vanadium Titanium

摘　　要：针对中间包夹杂物超标的问题,采用1∶2的水力学模型,对三流320 mm×480 mm大方坯中间包流场进行物理模拟,研究控流装置对钢液流动特性的影响,优化中间包流场。模拟结果表明:原型中间包存在着滞止时间短、死区比例大、持续流动的液体对中间包前壁不断的冲刷侵蚀的问题。采用方案3的挡墙与挡坝,滞止时间增加了18.05 s,且两个水口的滞止时间标准差仅为0.18,死区比例降幅为30.51%,很好地改善了液体的流动特性。In view of excessive non-metallic inclusion content in a three-strand tundish for 320 mm × 480 mm bloom casting, the effect of flow control device on flow characteristics of the tundish has been studied by water modeling with a geometrical similarity ratio 1 ： 2 to optimize the tundish flow field. The results re- veal the problems with the prototype tundish such as short residence time, large dead zone and erosion in the front wall of tundish by continuous flow of molten steel. The residence time is increased by 18.05 s while standard deviation of residence time Stmin between the two nozzles is only at 0.18 and the dead zone is decreased by 30.15% by using the baffle and dam in scheme 3, which greatly improves the flow char- acteristic of liquid.

关 键 词：中间包 流场 水模拟 挡墙 挡坝 

分 类 号：TF777.2[冶金工程—钢铁冶金]