板坯连铸双流73 t中间包控流装置优化的水模型研究

根据相似原理采用1:3水模型研究了238 mm×1 500 mm板坯双流连铸73 t中间包不同控流装置对流场的影响,以便得出最佳控流组合及优化的挡墙位置和高度。结果表明,采用双层湍流抑制器和下挡墙配合使用是双流中间包控流的较优组合,当下挡墙位置在模型中距长水口685 mm,高度为152 mm时,平均停留时间相对原型中间包延长了53.5 s,死区比例由27.9%减小到13.1%,较好地改善了中间包内流体的流动形态,有利于均匀钢液温度和夹杂物上浮去除。

A study of Water Model on Optimizing Flow Control Devices in 73 t Tundish for Two-Strand Slab Casting

Based on similarity principle, the effect of different flow control device in 73 t tundish for two-strand 238 mm x 1 500 mm slab casting on flow field has been studied by using 1 : 3 water model in order to get optimum flow control device combination and optimizing dam position and height. Water modelling results show that the better flow control device combination in tundish for two-strand casting is to use double-decker turbulence inhibitor and dam, and for dam with 152 mm height and distance from long nozzle 685 mm, as compared with original tundish structure the average resident time increases by 53. 5 s and the dead area decreases from 27. 9% to 13. 1%, it is better to improve the flow status of liquid in tundish and favourable to uniform the temperature of liquid and remove the inclusions in liquid floating off.