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采用数值模拟方法研究了不同磁感应强度下电磁制动(EMBr)对某钢厂结晶器流场、传热以及夹杂物去除的影响.结果表明采用电磁制动,结晶器内流体的表面流速增加,对窄面冲击深度减少,结晶器自由表面温度升高,高温区上移而且范围扩大.随着磁感应强度增加,自由液面温度提高2～5℃,这有助于保护渣的熔化,可改善弯月面的钢液流动特性.夹杂物尺寸越大,越容易为结晶器液面所吸收去除,对于尺寸大于30μm的夹杂物,磁感应强度越大,夹杂物越容易被结晶器保护渣所吸收.
The effects of electromagnetic brake (EMBR) on mold flow, heat transfer and inclusions removal in a steel mill under different magnetic induction intensities were studied by numerical simulation. The results show that the surface velocity of the fluid in the mold increases with electromagnetic braking, Narrow impact depth reduction, mold free surface temperature increases, the high temperature range and the scope of the upper shift with the increase of the magnetic flux density, the free surface temperature increased by 2 ~ 5 ℃, which helps to protect the slag melting, can improve The flow characteristics of the liquid steel in the meniscus.The larger the inclusion size, the easier it is to be absorbed and removed by the liquid level of the mold. For the inclusions larger than 30 μm in size, the greater the magnetic flux density, the more the inclusions are absorbed by the mold powder .