Abstract: Based on geometry similar principle, the effect of shell angle (15° and 8°) of 24 t tundish for single strand slab casting on liquid flow condition has been studied by established 1:2 water model, and the water simulation results is verified by numerical simulation. Results show that the shell angle of prototype tundish (15°) is too big, of that the rate of dead zone volume in casting area is 33. 9% , the average residence time is short and the distribution of liquid temperature is uneven； and with using optimized shell angle of tundish ( 8°) the rate of dead zone volume in casting area reduces by 56. 3% , the average residence time increases by 33. 5% and the distribution of liquid temperature is more even. 10 heats commercial pilot production results show that after optimization with shell angle 8° the liquid temperature vibration extent decreases obviously and the occurrence frequency of inclusions in steel markedly reduces.

摘要： 根据相似原理,通过建立24 t中间包1:2水力学模型对单流板坯24 t中间包的外壳倾角(15°和8°)对钢液流动状态的影响进行了研究,并用数值模拟对水模拟结果进行定性验证。结果表明,原型中间包外壳倾角(15°)太大,浇铸区死区体积达到33.9%,平均停留时间短并且温度分布不均匀;通过采用优化的中间包外壳倾角(8°),死区体积降低了56.3%,平均停留时间提高了33.5%,并且使得浇铸区温度分布更加均匀。经过10炉工业试验后结果表明,外壳倾角8°优化后中间包钢水温度的波动明显降低,夹杂物出现频率亦显著降低。

关键词: 中间包外壳倾角, 钢水温度, 夹杂物数量, 水模拟, 数值模拟, 应用