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针对某钢厂中间包使用原挡坝时死区较大,流经挡坝钢液向上运动趋势不明显,流场不利于夹杂物上浮去除等问题,采用中间包水模型试验,对挡坝结构进行了优化,设置了气幕档墙。结果表明,提高挡坝高度,开向上角度通钢孔,并设置气幕挡墙,可有效消除浇注区及挡坝后死区,死区体积比降低46%;钢液向液面运动趋势增大,滞止时间提高23%,峰值时间提高16%。工业试验表明,中间包采用优化后的控流装置,夹杂物总量从14.4 mg/10 kg降为6.64 mg/10 kg,中间包钢液内大型夹杂物得到有效去除。
For a steel tundish, the dead zone is larger when the dam is used, and the upwards movement tendency of the molten steel flowing through the dam is not obvious. The flow field is not conducive to the removal of inclusions. Using the tundish water model test, Optimized, set the air curtain arch wall. The results show that increasing the height of baffle, opening up the upper angle steel hole and setting curtain wall can effectively eliminate the dead zone after pouring area and dams, the volume ratio of dead zone decreases 46% Large, stagnant time increased by 23%, peak time increased by 16%. Industrial tests show that the tundish with optimized flow control device reduces the total amount of inclusions from 14.4 mg / 10 kg to 6.64 mg / 10 kg, and effectively removes large inclusions in the tundish.