优化八流中间包内控结构的研究

Research on Optimizing Internal Control Structure of Eight Strand Tundish

摘要: 根据相似原理，以某厂八流中间包为研究对象，对不同控流元件布置结构对中间包内流场的影响开展物理模拟研究，然后在某钢厂开展了工业试验，并对6个浇次同钢种的34个样品取样分析了改进前后的钢中夹杂物的评级情况。结果表明，采用湍流控制器 + L型向上开孔挡墙的方案中间包流场结构最优，改进方案钢中B类与Ds类夹杂物均有大幅降低，其出现比例分别降低了62.5%和54.5%，夹杂物平均级别分别降低了74.3%和65.7%。改进方案对中间包夹杂物有明显的去除效果。

Abstract: According to the principle of similarity, taking the eight strand tundish of a factory as the research object, the physical simulation study was carried out on the influence of different flow control element layout structures on the flow field in the tundish. Then, an industrial test was carried out in a steel factory, and 34 samples of the same steel grade for 6 casting times were sampled to analyze the inclusion rating in the steel before and after improvement. The results show that the flow field structure of the tundish with turbulence controller and L-shaped upward opening retaining wall is optimal, and the inclusions of type B and Ds in the steel of the improved scheme are significantly reduced, with their occurrence proportions reduced by 62.5% and 54.5% respectively, and the average level of inclusions reduced by 74.3% and 65.7% respectively. The improved scheme has obvious removal effect on inclusions in tundish.