Numerical Simulation on the Flow State of Dross Layer in Tundish

In tundish, the flow state of top dross layer not only influences the oxidation of the molten steel, but also is directly related to the floating and adsorption of inclusions, and is concerned with the entrainment of steel to micro-inclusions. In this study, with the VOF method, the charging and normal casting processes are numerical simulated, two structural models of tundish being created. The results demonstrate that the flow control has significant effect on the stability of dross layer and the probability of dross entrainment. The improved structural model can effectively stabilize the dross layer and reduce the risk of entrainment. It plays an important role on the removal of inclusions, and enhances the cleanliness of molten steel.