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为研究水口堵塞对结晶器流场以及夹杂物去除的影响,引入滑动水口模拟实现水口部分堵塞,在水口滑板的开启方向垂直于结晶器宽面的条件下,针对板坯连铸结晶器内流场及固体夹杂物的去除率进行数值模拟。结果显示:在滑板不完全开启时,水口内钢液呈明显偏流,在滑板下方区域中有回流区,并在水口底端形成单侧撞击流,使水口的出流钢液呈旋转状流态。随钢液注流进入结晶器的夹杂物颗粒的去除率(上浮率)随其粒径增大而升高,对粒径达到0.5 mm以上者可完全去除。模拟结果显示:滑板在最佳开启率时,可有效提高夹杂物颗粒的去除率。
In order to study the influence of nozzle blockage on mold flow field and inclusions removal, a sliding nozzle was introduced to simulate the blockage of the nozzle. Under the condition that the opening direction of the nozzle slider was perpendicular to the mold surface, Field and solid inclusion removal rate of numerical simulation. The results show that when the skateboard is not fully open, the liquid steel in the water outlet is obviously offset, and there is a recirculation zone in the area below the skateboard, and a unilateral impact flow is formed at the bottom of the water outlet, . With the flow of molten steel into the mold inclusions removal rate (floating rate) increases with its particle size increases, the particle size of 0.5 mm or more can be completely removed. The simulation results show that the skateboard can effectively improve the removal rate of inclusions particles at the best opening rate.