Mathematical and physical simulation and optimization of non-isothermal flow field in channel tundish
WANG Shu-hao1, HUANG Jun1, ZHANG Rui2, ZHOU Shi-kai2, YI Bing3
1. School of Energy and Environment, Inner Mongol University of Science and Technology, Baotou 014010, Inner Mongol, China; 2. Metallurgical Equipment Research Institute, China National Heavy Machinery Research Institute Co., Ltd., Xi'an 710032, Shaanxi, China; 3. Technology Department, Hunan Zhongke Electric Co., Ltd., Yueyang 414000, Hunan, China
Abstract:In order to study the influence of the internal structure of the channel-type tundish and the non-isothermal conditions on the flow field, this study optimized the position and angle of the tundish channel and the angle of the fork to determine the optimal design of the tundish channel. This study used traditional numerical simulation and water simulation combined with advanced speed measurement methods, and based on non-isothermal water simulation experiments, quantitatively researches the characteristic parameters such as velocity field, vorticity field and RTD in the tundish. Moreover,it explored the influence of non-isothermal conditions on the flow field of the tundish. The results showed that the heating of the channels in the tundish significantly affects the distribution of the flow field and enhances the range and intensity of the turbulence distribution. From the time-averaged results of the water simulation, it can be seen that the maximum flow velocity of the liquid surface under non-isothermal conditions is 0.06 m/s, which is 50% higher than that under isothermal conditions. After comparison of the schemes, the position of the main channel was at a height of 150 mm from the center of the channel longitudinally to the bottom, and the angle with the bottom was 3°. Simultaneously, the structure with the fork and the plane of the main channel at an elevation angle of 30° was the appropriate solution for the channel tundish.
Chen C, Jonsson L T I, Tilliander A, et al. A mathematical modeling study of the influence of small amounts of KCl solution tracers on mixing in water and residence time distribution of tracers in a continuous flow reactor-metallurgical tundish[J].Chemical Engineering Science, 2015,137:914.
Alizadeh M, Edris H, Shafyei A. Fluid flow and mixing in non-isothermal water model of continuous casting tundish[J].Journal of Iron and Steel Research International, 2008,15(2):7.
[10]
TANG H, GUO L, WU G, et al. Hydrodynamic modeling and mathematical simulation on flow field and inclusion removal in a seven-strand continuous casting tundish with channel type induction heating[J].Metals-Open Access Metallurgy Journal, 2018,8:374.
Ueda T, Ohara A, Sakurai M, et al. A tundish provided with a heating device for molten steel: The European Union, EP0119853,1984-09-26.
[14]
Mabuchi M,Yoshii Y,Nozaki T, et al. Investigation of the purification of molten steel by using tundish heater: Development on the controlling method of casting temperature in continuous casting V[J].ISIJ International, 1984,70:118.
Cwudziński A. Physical and mathematical simulation of liquid steel mixing zone in one strand continuous casting tundish[J].International Journal of Cast Metals Research, 2017:30.
Joo S, Guthrie R. Inclusion behavior and heat-transfer phenomena in steelmaking tundish operations: Part I. Aqueous modeling[J].Metallurgical Transactions B, 1993,24(5):755.
[24]
He Y, Sahai Y. The effect of tundish wall inclination on the fluid flow and mixing: A modeling study[J].Metallurgical Transactions B, 1987,18:81.
Chen H S, Pehlke R D. Mathematical modeling of tundish operation and flow control to reduce transition slabs[J].Metallurgical and Materials Transactions B, 1996,27:745.
[29]
肖兴国. 冶金反应工程学[M].沈阳:东北大学出版社,1989.
[30]
Sahai Y, Emi T. Melt flow characterization in continuous casting tundishes[J].ISIJ International, 1996,36(6): 667.