全幅一段电磁制动与立式电磁制动技术模拟研究

以ANSYS14.5和FLUNET6.3为计算平台,针对全幅一段电磁制动技术和立式电磁制动技术,模拟计算了电磁制动过程结晶器内磁感应强度和流场分布.计算结果表明:全幅一段电磁制动和立式电磁制动技术在钢液中可以产生恒定有效磁场,磁感应强度主要集中于磁极覆盖区域,能够对钢液主射流起到控制作用,促进非金属夹杂物和气泡的上浮分离从而提高铸坯的纯净度;立式电磁制动能够更好地控制钢液主射流冲击铸坯窄面后的上升流,更加有效地稳定自由液面波动,克服了全幅一段电磁制动对上升流控制不力的缺点;全幅一段电磁制动对下降流控制稍好,但从整体制动效果上看,立式电磁制动技术更好,具有较全面并且良好的冶金效果.

Simulation Study of EMBr-Ruler Technology and V-EMBr Technology

In ANSYS14.5 and FLUNET6.3 computing platforms, distribution of magnetic flux density and flow field in the mold were simulated during the electromagnetic braking process of EMBr (electromagnetic brake)-Ruler and V-EMBr (vertical electromagnetic brake ), respectively. The calculation results show that EMBr-Ruler and V-EMBr can generate a constant and effective magnetic field in molten steel, and the magnetic flux density is mainly focused on the poles covered region. EMBr-Ruler and V-EMBr can control the mainstream of molten steel and promote flotation and removal of non-metallic inclusions and bubbles to improve the purity of the slab. V-EMBr can better control the upward flow which is formed after the narrow face of mold impacted by the mainstream, stabilize more effectively fluctuations of free surface and overcome the disadvantage of inadequate control upward flow with EMBr-Ruler. EMBr-Ruler can better control the downward flow, but the overall braking effect of V-EMBr and its metallurgical effect are more comprehensive and favorable.