Effect of channel diameter on magneto-thermal conversion ratio and consistency of each strand in a multi-strand induction heating tundish
Pu Wang1, Hong Xiao1,2, Xi-qing Chen1, Hai-yan Tang1, Jia-quan Zhang1
1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2 Magnetoelectric Research Institute, Hunan Zhongke Electric Co., Ltd., Yueyang 414000, Hunan, China
Effect of channel diameter on magneto-thermal conversion ratio and consistency of each strand in a multi-strand induction heating tundish
Pu Wang1, Hong Xiao1,2, Xi-qing Chen1, Hai-yan Tang1, Jia-quan Zhang1
1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2 Magnetoelectric Research Institute, Hunan Zhongke Electric Co., Ltd., Yueyang 414000, Hunan, China
摘要 The electromagnetic, flow, heat transfer and inclusions motion model of the channel-type induction heating (IH) tundish was established, and the effect of the channel diameter on the metallurgical behavior of the tundish was studied. The results show that the magnetic field in the channel of the IH tundish tends to concentrate on the surface layer and the side near the coil. As the channel diameter is increased from 100 to 180 mm, the maximum value of magnetic flux density in the channel decreases by 0.125 T, and the maximum value of electromagnetic force decreases by 11.83 9 105 N m-3; however, the off-center distance of magnetic field increases by 9.4 mm, and the Joule heat in the channel decreases by 1004 kW, which leads to the reduction in temperature rising rate of the tundish from 1.41 to 0.59 K min-1. When the channel diameter is 100, 140 and 180 mm, the maximum velocity at the channel exit before heating is 0.59, 0.29 and 0.18 m s-1, and after heating for 1800 s, it is 1.52, 1.12 and 0.92 m s-1, respectively. In addition, the total inclusions escape ratio after heating for 1800 s with a channel diameter of 140 mm can be reduced by 12.39% compared to that before heating, and the maximum difference of escape ratios for each strand is only 4.51% and 5.32% before heating and after heating for 1800 s, respectively. Compared with the channel diameters of 100 and 180 mm, the channel diameter of 140 mm is more favorable to improve the metallurgical effect of the IH tundish.
Abstract：The electromagnetic, flow, heat transfer and inclusions motion model of the channel-type induction heating (IH) tundish was established, and the effect of the channel diameter on the metallurgical behavior of the tundish was studied. The results show that the magnetic field in the channel of the IH tundish tends to concentrate on the surface layer and the side near the coil. As the channel diameter is increased from 100 to 180 mm, the maximum value of magnetic flux density in the channel decreases by 0.125 T, and the maximum value of electromagnetic force decreases by 11.83 9 105 N m-3; however, the off-center distance of magnetic field increases by 9.4 mm, and the Joule heat in the channel decreases by 1004 kW, which leads to the reduction in temperature rising rate of the tundish from 1.41 to 0.59 K min-1. When the channel diameter is 100, 140 and 180 mm, the maximum velocity at the channel exit before heating is 0.59, 0.29 and 0.18 m s-1, and after heating for 1800 s, it is 1.52, 1.12 and 0.92 m s-1, respectively. In addition, the total inclusions escape ratio after heating for 1800 s with a channel diameter of 140 mm can be reduced by 12.39% compared to that before heating, and the maximum difference of escape ratios for each strand is only 4.51% and 5.32% before heating and after heating for 1800 s, respectively. Compared with the channel diameters of 100 and 180 mm, the channel diameter of 140 mm is more favorable to improve the metallurgical effect of the IH tundish.
Pu Wang,Hong Xiao,Xi-qing Chen, et al. Effect of channel diameter on magneto-thermal conversion ratio and consistency of each strand in a multi-strand induction heating tundish[J]. Journal of Iron and Steel Research International, 2023, 30(6): 1199-1210.
2023, Vol. 30 
