Numerical Simulation of the Flow Field in Tundish Without Dams
A mathematical model was established to investigate the influence of nondam on flow field in tundish in a Chinese steel mill,and a water model was adopted to verify the mathematical model.The results indicate that in the tundish with dams,the colliding zones are inner-space of inhibitor and the zone between upper and lower baffles.The tundish without dams operates with large volume of ultra-low-velocity zone,enlarged dead zone and ultra-long residen-tial time.The inhibitor was modified and the diameter of hole was increased to 75 mm and the width was increased to 150 mm,which can reduce dead zone and ultra-low-velocity zone,greatly extending the average residential time.The flux rate of argon blowing in shroud can be increased to 2.5×10-4 Nm3/min without hot eye and slag entrainment,which helps to removal of inclusion.However,inclusion-easy-colliding zone is decreased abundantly after removing the dams in tundish.
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