采用气幕挡墙感应加热中间包的模拟研究

Simulation on influence of gas curtain in induction heating tundish

为了研究气幕挡墙对感应加热中间包内传输行为的影响,根据实际单流双通道感应加热中间包数据,通过数值模拟的方法,建立三维非稳态数学模型研究了气幕挡墙对感应加热中间包内流动、传热及夹杂物传输行为的影响规律。结果表明,气幕挡墙能够使感应加热中间包浇注区内流场分布更合理,钢液成分更均匀,更有利于夹杂物的上浮去除;浇注区内钢液的温度场分布更均匀,温差不超过1 K,温度较低区域进一步缩小;使用气幕挡墙后夹杂物的去除率较使用前明显提高,去除率提高约41%。

In order to study the influence of gas curtain on the transfer behavior in the induction heating tundish,based on an actual one-strand channel-type induction heating tundish,a three-dimensional unsteady mathematical model was established by numerical simulation to study the influence of gas curtain on flow,heat transfer and inclusion transfer behavior in the induction heating tundish.The results show that with the use of gas curtain,the molten steel flow in the discasting chamber of induction heating tundish is more reasonable,and the composition of the liquid steel is more uniform.This phenomenon is more beneficial to inclusion removal.The temperature field in the discasting zone is more evenly distributed,the temperature difference does not exceed 1 K,and the low temperature regions decrease further.The inclusion removal rate of induction heating tundish with gas curtain is much higher than that without air curtain,which has improved by about 41%.