关键词: 63t中间包, 板坯连铸, 水模型, 停留时间分布(RTD)曲线, 通道式钢液过滤器, 数值模拟

Abstract: The simulation research on liquid flow field, temperature field and inclusions moving trace in tundish for two strands slab casting with 3 kinds of structure-(a) turbulence inhibitor and wall + dam (original structure) , (b) turbulence inhibitor, wall + dam and channel filter and (c) turbulence inhibitor, wall and channel filter has been carried out by using geometric similarity 0. 29 ： 1 water model and mathematical model. Results show that in tundish with original structure (a) the plug flow area is relatively small and the dead area is rather large； by adding channel liquid filter (b) the short circuit flow basically disappears, the dead volume in tundish decreases by 6. 83% and the average resident time of liquid increases from 287. 04 s to 373. 76 s, it is available to remove the inclusions from liquid and the effect of filter on drop in temperature of liquid is not obvious ； by using the filter to replace the dam (c) the effect of optimization is particularly obvious, that is the average residence time of liquid in tundish increases from 287. 04 s to 404.26 s, the peak time increases from original 95. 4 s to 190.8 s and the dead volume decreases from 36.10% to 8.76% .