Numerical Simulation of Collision-Coalescence and Removal of Inclusion for the Tundish with Channel Type Induction Heating
Tundish is an intermediate vessel in continuous casting placed between the ladle and the mould,therefore,the research of tundish metallurgy process have gained more and more respect.Tundish has transform into metallurgy reactor from steel reservoir and steel distributor now.Many researchers studied fluid flow,heat transfer and inclusion behavior in the tundish.A mathematical model is developed to describe in a tundish for the molten steel flow,heat transfer,electromagnetic field and inclusion removal with and without channel induction heating.Based on ANSYS software,the electromagnetic field was obtained,and with the help of Fortran program,the Joule heat power and Lorentz force can be imported the energy and momentum equations in CFX software.The results indicate that,without channel induction heating condition,the temperature at the outlet is 8K less than that at the inlet,and the temperature is maldistribution.With channel induction heating condition,the temperature at the outlet is 20K greater than that at the inlet.The induction heating not only can be of great help in minimizing temperature maldistribution and flow maldistribution,but also enhance temperature uniformity in discharging chamber and straighten out flow in channel.Meanwhile,the removal rate of inclusion is 17.78%without channel induction heating.However,the removal rate of inclusion is 36.20%with channel induction heating.The imposition of electromagnetic field will improve the coalescence of inclusion.Particularly,there are more chance for the inclusion to collision in the channel,the greater residence time of the molten steel will help the flotation of the large particles due to collision-growth.There are three inclusion removal mechanism: free surface adsorption,channel adsorption and wall adsorption,in this case,their removal rate are 28.4%,6.6%and 10.6%respectively,so the key removal mechanism is free surface adsorption.
induction heating tundish electromagnetic removal rate flow temperature
YANG Bin LEI Hong BI Qian ZHAO Yan
School of Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China;Key Laboratory of Electr Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern Univers
国际会议
STEELSIM2017(第七届冶金过程及钢铁材料模拟及仿真国际会议)
青岛
英文
248-250
2017-08-16（万方平台首次上网日期，不代表论文的发表时间）