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以某厂50tT型2流中间包为研究对象,利用大型商业软件ANSYS CFX10.0建立了三维有限体积模型,采用多相流模型对中间包内钢液的流动特性、温度分布与夹杂物去除规律进行了数值模拟,重点研究了不同堰-坝组合方式、湍流抑制器形状、拉速、夹杂物粒径等工艺参数对中间包内钢水平均停留时间、夹杂物上浮率的影响。结果表明:湍流抑制器对夹杂物的上浮去除影响不大;随着夹杂物粒径的增大,夹杂物的上浮率迅速增大;20μm以下的夹杂物则很难在中间包内上浮去除;随着拉速的增大,夹杂物的上浮率是不断减小的;采用堰A=300cm、坝B=400cm、方形瓦楞湍流抑制器、过滤器组合式控流装置时夹杂物的上浮去除效果最好。
Taking a 50tT 2-tundish tundish as a research object, a 3-D finite volume model was established by using large-scale commercial software ANSYS CFX10.0. The flow characteristics, temperature distribution and inclusion removal rules of liquid steel in tundish The effects of different weir - dam combination, shape of turbulence suppressor, pulling speed and particle size of inclusions on the average residence time of molten steel and the floating rate of inclusions in the tundish were studied emphatically. The results show that the turbulence suppressor has little effect on the floating removal of inclusions. The rising rate of inclusions increases with the increase of the inclusion size. The inclusions below 20μm are difficult to float in the tundish. With the increase of the pulling rate, the floating rate of inclusions is decreasing continuously. The effect of floating removal of inclusions in the combined flow control device with weir A = 300cm, dam B = 400cm, square corrugated turbulence suppressor, the best.