控流装置对板坯中间包流场的数值模拟优化

doi:10.13228/j.boyuan.issn1005-4006.20220135

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Abstract The numerical simulation method is adopted,and the 3D mathematical model is established by ANSYS simulation software to simulate the flow behavior of molten steel in tundish with or without flow control device and different combinations of flow control device.The results show that the diversion wall and dam in tundish have a significant effect on the flow behavior of molten steel.The change of the distance between the diversion wall and dam mainly affects the liquid steel flow between the diversion wall and dam,and the liquid steel flow in the right area of the diversion dam.The height of the diversion wall mainly affects the turbulent liquid steel re-flux flow on the left side of the diversion wall and the velocity of liquid steel flowing to the nozzle.The change of the diversion dam height affects the flow of molten steel on the right side of the dam.Too low diversion dam causes the short circuit flow of molten steel in tundish.A relatively ideal optimization flow control combination is that the height of diversion wall is 550 mm,the height of diversion dam is 350 mm,the distance of diversion wall from the entrance is 800 mm,and the distance between diversion wall and dam is 400 mm.The industrial production verification shows that the optimized combination of the flow control device has an obvious upward removal effect on medium and large inclusions.The total proportion of medium and large inclusions over 20 μm is reduced from 23.7% to 9.1%,and no large inclusions over 200 μm are detected in the slab.It is expected that a series of quality defects such as internal inclusion,surface slag and nodulation of microalloyed slab can be eliminated or alleviated by optimizing the parameters of flow control device.

Key words： numerical simulation tundish flow field diversion wall diversion dam

Received: 02 August 2022

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	Articles by authors
	LIU Dong-xu
	GONG Wei
	ZHU Jiang-jiang
	CAO Rui-hong
	FAN Ding-dong
	DENG Ai-jun

Cite this article:

LIU Dong-xu,GONG Wei,ZHU Jiang-jiang等. Numerical simulation and optimization of flow field in tundish by flow control device[J]. CONTINUOUS CASTING, 2023, 42(2): 10-18.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20220135 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I2/10

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