Experimental and Numerical Simulation of Fluid Flow and Inclusion Removal in the Steel Continuous Casting Tundish

Document Type : Research Article

Authors

1 yazd university

2 Mechanical Engineering/Yazd University

Abstract

During the steel continuous casting process, the tundish is the last metallurgical actuator in which there will be an opportunity for removal of impurities present in the melt. Therefore, improving of the fluid flow phenomena inside the tundish, including the type of fluid flow pattern, increasing of inclusion residence time in the tundish, decreasing of volume of stagnant fluid and increasing of fluid flow in the rotation, can improve the process of separation of the inclusion and absorbing them into slag and the preparation of clean steel. In the mathematical method, the FLUENT software is used and in the experimental method, by manufacturing of the glass tundish in 1:4 scale and molten flow physical simulation, the effect of applying the dam in the tundish, as well as the change in the height of the melt on the behavior of the flow has been investigated, and it has been determined that decreasing of the molten height in the tundish increases the separated inclusion from the molten and inclusion residence time in the tundish. Also, using the dam at the inlet nozzle with a tall dam on the sides of the tundish leads to the removal of the inclusion and improving the molten flow.

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Main Subjects


[1]  S. Lopez-Ramirez, J. Palafox-Ramos, R. Morales, J. Barreto, D. Zacharias, Modeling study of the influence of turbulence inhibitors on the molten steel flow, tracer dispersion, and inclusion trajectories in tundishes, Metallurgical and Materials Transactions B, 32(4) (2001) 615-627.
[2]  M. Alizadeh, H. Edris, Optimization of molten flow pattern in steel making tundish for cleanliness steel productin and minimum mix  production Journal of Advanced Materials and Technologies, 3(2) (2013) 11-23. (in Persian)
[3]  Y. Miki, B.G. Thomas, Modeling of inclusion removal in a tundish, Metallurgical and materials transactions B, 30(4) (1999) 639-654.
[4]  J.G. Liu, H.C. Yan, L. Liu, X. H. Wang, Water modeling of optimizing tundish flow field, Journal of iron and steel research, International, 14(3) (2007) 1420.
[5]  S.G. Zheng, M.Y. Zhu, Y.L. Zhou, S. Wang, Flow characteristics and inclusion removal in a ten-strand continuous casting tundish: Physical Modelling and Industrial Trials, Journal of Iron and Steel Research, International, 23(2) (2016) 92-97.
[6]  P.K. Jha, P.S. Rao, A. Dewan, Effect of height and position of dams on inclusion removal in a six strand tundish, ISIJ international, 48(2) (2008) 154-160.
[7]  S. Yang, L. Zhang, J. Li, K. Peaslee, Structure optimization of horizontal continuous casting tundishes using mathematical modeling and water modeling, ISIJ international, 49(10) (2009) 1551.0651
[8]  A. Kumar, D. Mazumdar, S.C. Koria, Modeling of fluid flow and residence time distribution in a fourstrand tundish for enhancing inclusion removal, ISIJ international, 48(1) (2008) 38-47.
[9]  L. Zhang, S. Taniguchi, K. Cai, Fluid flow and inclusion removal in continuous casting tundish, Metallurgical and Materials Transactions B, 31(2) (2000) 253-266.
[10] E. Martinez, M. Maeda, L.J. Heaslip, G. Rodriguez, A. Mclean, Effects of fluid flow on the inclusion separation in continuous casting tundish, Transactions of the Iron and Steel Institute of Japan, 26(8) (1986) 724-731.
[11] C. Damle, Y. Sahai, The effect of tracer density on melt flow characterization in continuous casting tundishes–a modeling study, ISIJ international, 35(2) (1995) 163-169.
[12] C. Fan, R. Shie, W.S. Hwang, Studies by mathematical and physical modelling of fluid flow and inclusion removal phenomena in slab tundish for casting stainless steel using various flow control device designs, Ironmaking & Steelmaking, 30(5) (2003) 341-347.
[13] Y. Sahai, T. Emi, Criteria for water modeling of melt flow and inclusion removal in continuous casting tundishes, ISIJ international, 36(9) (1996) 1166-1173.
[14] J. Rogler, L. Heaslip, M. Mehrvar, Physical modelling of inclusion removal in a tundish by gas bubbling, Canadian metallurgical quarterly, 44(3) (2005) 357-368.
[15] D.Y. Sheng, C.S. Kim, J.K. Yoon, T.C. Hsiao, Water model study on convection pattern of molten steel flow in continuous casting tundish, ISIJ international,38(8)(1998)843-851.
[16] S. Singh, S.C. Koria, Model study of the dynamics of flow of steel melt in the tundish, ISIJ international,33(12)(1993)1228-1237 .
[17] S. Zheng, M. Zhu, Optimisation of baffles in six strand round bloom continuous casting tundish: a physical modelling study, Ironmaking & steelmaking,33(5)(2006) 398-406.