Steel flow characteristics and structure optimization for slab electromagnetic induction heating tundish
DUAN Peng-fei1,2, YANG Bin1,2, DENG An-yuan1,2, XU Xiu-jie1,2, WANG En-gang1,2
1. Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, Liaoning, China; 2. School of Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China
Abstract：The use of electromagnetic induction heating technology on the tundish can effectively compensate for the temperature drop of the molten steel, realize constant temperature and low temperature pouring. In order to make the electromagnetic induction heating tundish technology suitable for continuous slab casting, a mathematical model for the double-strand slab induction heating tundish was established, and the influence of the induction heating technology on the flow and temperature characteristics in the double-strand slab tundish was studied. The effects of dam structure and channel angle on temperature field and flow behavior of molten steel were investigated. The results show that the channel induction heating technology cannot be directly applied to double-strand slab casting, and it is necessary to optimize the tundish structure. Electromagnetic induction heating can significantly increase the temperature of molten steel in the distribution room of the tundish, but a short-circuit flow will occur. Retaining walls and dam structures are very effective in reducing short-circuit flow and uniformizing the molten steel temperature. When the distance between the dam and the nozzle is 0.5 m, the flow state of the molten steel is the best, and the temperature distribution of molten steel is relatively uniform. From the point of view of the flow behavior of molten steel, adjusting channel expansion angle is not suitable for the double-strand slab induction heating tundish. Through a reasonable heating power mode, the pouring temperature fluctuation can be controlled within 5 K.
YANG B, DENG A Y, DUAN P F, et al. “Power curve” key factor affecting metallurgical effects of an induction heating tundish[J]. Journal of Iron and Steel Research International, 2022, 29(1): 151.
YUE Q. Molten steel flow, heat transfer and inclusion distribution in a single-strand continuous casting tundish with induction heating[J]. Metals, 2021, 11(10): 1536.
Launder B E, Spalding D B. The numerical computations of turbulent flows[J]. Computer Methods in Applied Mechanics and Engineering, 1974, 3(2): 269.
[16]
Spezzapria M, Dughiero F, Forzan M, et al. Multiphysics FEM simulation of contour induction hardening process on aeronautical gears[J]. Journal of Iron and Steel Research International, 2012(s1): 95.
[17]
YANG B, DENG A Y, LI Y, et al. Numerical simulation of flow and solidification in continuous casting process with mold electromagnetic stirring[J]. Journal of Iron and Steel Research, International, 2019, 26(3): 219.
[18]
YANG B, DENG A Y, LI Y, et al. Exploration of the relationship between the electromagnetic field and the hydrodynamic phenomenon in a channel type induction heating tundish using a validated model[J]. ISIJ International, 2022, 62(4): 677.
[19]
YANG B, DENG A Y, KANG X L, et al. Numerical study on the influence of distributing chamber volume on metallurgical effects in two-strand induction heating tundish[J]. Metals, 2022, 12(3):509.
Sahai Y, Emi T. Melt flow characterization in continuous casting tundishes[J]. Transactions of the Iron and Steel Institute of Japan, 2007, 36(6): 667.
2022, Vol. 41 
