中间包V型挡墙的研究与应用

Research and Application of V-type Retaining Wall in Tundish

扫描电镜分析表明,铸坯夹杂物主要有Al2O3以及CaO-A12O3-SiO2-MgO系复合夹杂物。为了促进夹杂物在中间包内充分上浮,设计了4种挡墙进行水模对比试验,V型挡墙和20°孔洞倾角效果最好。现场应用表明,挡墙优化了中间包流场,均匀了中间包温度,促进夹杂物的积聚上浮,提高了中间包钢水的洁净度。大样电解结果表明,使用中间包挡墙后,夹杂物数量平均由35.740mg/10kg降为7.526mg/10kg。

SEM analysis showed that the inclusions in the slab are main Al2O3 and CaO-A12O3-SiO2-MgO compound inclusions. In order to promote the inclusions fully floating in tundish, four retaining walls were designed for making water model tests. The test results showed the effects of V-type wall with 20° hole inclination are best. The field application showed that the retaining wall optimized the flow field in tundish, homogenized the temperature, promoted the inclusions gathering and floating and increased the cleanliness of molten steel in tundish. Big sample electrolysis results showed that after applying the retaining wall, the inclusion amount was reduced to 7.526 mg/10 kg from 35.740 mg/10 kg averagely.