The multiphase flow, initial solidification and solute diffusion and their interactions in a mold region of 380 × 280 mm2 casting bloom under different installation positions of in-mold electromagnetic stirring (M-EMS) were analyzed and compared by a multi-physical model. The results showed that the simulated electromagnetic field and solute carbon distribution in initial solidified shell are basically consistent with measurements. As the distance from EMS center to the meniscus increases (from 0.32 to 0.62 m), the level fluctuation decrease from 7.2 to 4.5 mm, while the volume of turbulent zone clearly expands. Additionally, the solidified shell thickness at the mold outlets increase from 12.90 to 16.32 mm and from 26.41 to 28.97 mm at outlets of computational domain as EMS center moves down, while the surface temperature decreases. The maximum negative segregation deteriorates from 0.95 to 0.83 at the bloom corner while increasing from 0.84 to 0.92 in the thickness direction, and the difference between the minimum and maximum carbon concentrations at center of computational outlets is only about 0.0029 pct. The EMS should be installed around 0.42 m below the meniscus, by which the disqualified rate of non-metallic inclusions and the level fluctuations are within a low level.

中文翻译：

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电磁搅拌器位置对连铸大方坯结晶器冶金行为的影响

通过多物理模型对380×280 mm2铸坯铸坯在不同安装位置下的多相流动、初始凝固和溶质扩散及其相互作用进行了分析和比较。结果表明，模拟的电磁场和初始凝固壳中的溶质碳分布与实测基本一致。随着EMS中心到弯液面距离的增加（从0.32到0.62 m），液位波动从7.2减小到4.5 mm，而湍流区的体积明显扩大。此外，随着EMS中心向下移动，模具出口处的凝固壳厚度从12.90增加到16.32 mm，在计算域出口处从26.41增加到28.97 mm，而表面温度降低。最大负偏析在大圆角从 0.95 恶化到 0.83，而在厚度方向从 0.84 增加到 0.92，计算出口中心的最小和最大碳浓度之间的差异仅为约 0.0029 pct。EMS应安装在弯液面下方0.42m左右，非金属夹杂物不合格率和水平波动在较低水平。