Numerical simulation for flow characteristics of molten steel in tundish with channel type induction heater
ZHANG Han1,2, DAI Chuan-min1,2, LEI Hong1,2, ZHANG Xiu-xiang3
1. Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education, Northeastern University,Shenyang 110819,Liaoning,China; 2. School of Metallurgy, Northeastern University,Shenyang 110819,Liaoning,China; 3. Research and Development Institute,Bengang Steel Plates Company Limited,Benxi 117000,Liaoning,China
Abstract:The tundish with the channel type induction heating can effectively compensate for the temperature drop caused by the molten steel during the continuous casting process. The flow characteristics of molten steel are the key factor for the metallurgical process in the tundish with channel type induction heater. The commercial software ANSYS is used to solve the governing equations for electromagnetic field, flow field and temperature field. On the basis of the steady-state flow field and temperature field, the solute transport equation of tracer is solved to obtain the RTD curve. The results show that the temperature of the molten steel at the outlet is 20 K more than that at the ladle shroud in the case of the induction heating. Meanwhile, if the channel induction heating is applied, the overall average residence time is extended by 48 s, and the overall dead zone volume fraction is reduced to 21.5%. Meanwhile, in the tundish with the channel type induction heater, the stirring caused by the electromagnetic force is the main factor affecting the flow pattern of the molten steel, and the thermal convection caused by Joule heat is the secondary factor.
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