5流连铸中间包流场温场数学模拟

Mathematical Simulation for Velocity and Temperature Fields of Molten Steel in a 5-strand Tundish

采用数学模拟方法,研究了5流连铸中间包采用不同导流隔墙的钢液流场温场.模拟结果表明,采用原导流隔墙的中间包,钢液从导流孔流出后,直接流到中间包水口,在第一流水口上方存在大的死区,钢液温度分布不均匀,高温区和低温区温度相差10.7℃,各水口的钢液温度相差4℃.采用改进的导流隔墙,钢液流出导流孔后,大部分钢液在中间包上部流动,钢液的流动路径增加,死区体积变小,钢液温度分布比较均匀,中间包各流水口之间的温度相同.

Velocity and temperature fields of molten steel in a 5-strand tundish with different baffles were investigated by mathematical simulation.The calculation results showed that liquid steel directly moved to the outlets of tundish with original baffle after it flowed out from the holes in the baffle,and there was a large dead zone above the first outlet.Temperature distribution in the original tundish configuration was not uniform.The temperature difference between high temperature zone and low one on the liquid surface outside the pouring zone was 10.7℃ and the temperature difference among the outlets of the tundish 4℃.With the improved baffle,molten steel mainly flowed in the upper layer of tundish bath after it departed from the holes in the baffle.The flowing route of liquid steel became long and dead zone small in the tundish.Temperature field of liquid steel turned uniform and temperature of steel flowing out from the tundish outlets was the same.