Physical simulation on optimization of baffles in an induction heating tundish
MA Zhi-min1, WANG Jia-hui2, FANG Qing2, XIAO Hong1, YI Bing1, ZHANG Hua2
1. Hunan Zhongke Electric Co., Ltd., Yueyang 414000, Hunan, China; 2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Abstract:The continuous casting process of special steel has strict requirements for the uniformity and cleanliness of liquid steel in the tundish equipped with channel induction heating technology. In this paper, aiming at the four-strand two-channel induction heating tundish of a steel plant in China, the flow field and Residence Time Distribution(RTD) curves in the tundish under the schemes of prototype (without a baffle), V-type baffle and trumpet-type baffle were investigated and compared by the water model experiments to obtain the optimum designation of baffle and diversion hole for the tundish. The research results showed that the tundish applying the trumpet-type baffle appears great advantages over the V-type baffle in terms of more average residence time and less volume fraction of dead zone. The optimum scheme is case A2, in which two diversion holes are applied on each wall of the trumpet-type baffle. The average residence time is 707.7 s, and the dead zone volume fraction is 11.86%. Compared to the cases of the prototype (without a baffle), the V-type baffle equipped with four diversion holes (Case B1 and Case B2) and two diversion holes (Case C1 and Case C2) on each wall, the average residence time under the Case A2 is prolonged by 223.4 s, 122.1 s, 117.2 s, 85.3 s, 68.4 s, and the dead zone volume fraction is reduced by 18.28%, 15.24%, 14.59%, 10.64%, 8.52%, respectively.
Mazumdar D. Review, analysis, and modeling of continuous casting tundish systems[J]. Steel Research International, 2019, 90(4): 1800279.
[2]
TANG H, WANG K, LI X, et al. Improved metallurgical effect of tundish through a novel induction heating channel for multistrand casting[J]. Metals, 2021, 11(7): 1075.
[3]
ZHAO M, WANG Y, YANG S, et al. Flow behavior and heat transfer of molten steel in a two-strand tundish heated by plasma[J]. Journal of Materials Research and Technology, 2021, 13: 561.
[4]
YANG B, DENG A, 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.
YANG B, LEI H, BI Q, et al. Fluid flow and heat transfer in a tundish with channel type induction heating[J]. Steel Research International, 2018, 89(10): 1800173.
Zhang L, Taniguchi S, Cai K. Fluid flow and inclusion removal in continuous casting tundish[J]. Metallurgical and Materials Transactions B, 2000, 31(2): 253.
[11]
WANG Q, QI F, LI B, et al. Behavior of non-metallic inclusions in a continuous casting tundish with channel type induction heating[J]. ISIJ International, 2014, 54(12): 2796.
[12]
XING F, ZHENG S, ZHU M. Motion and removal of inclusions in new induction heating tundish[J]. Steel Research International, 2018, 89(6): 1700542.
[13]
WANG P, CHEN X, XIAO H, et al. Effect of flow control devices on the distribution of magnetic-flow-heat in the channel induction heating tundish[J]. Ironmaking and Steelmaking, 2021, 48(10): 1200.
Karr U, Sandaiji Y, Tanegashima R, et al. Inclusion initiated fracture in spring steel under axial and torsion very high cycle fatigue loading at different load ratios[J]. International Journal of Fatigue, 2020, 134: 105525.