过滤控流中间包流场及夹杂物去除的数值模拟

doi:10.13228/j.boyuan.issn1005-4006.20210080

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Abstract Taking a 60 t slab continuous casting tundish as the research object, the Roynolds-averaged Navier Stokes (RANS), the Species Transport, and the Discrete Phase Model (DPM) were used to calculate the evolution of liquid steel flow field, inclusion trajectory and removal rate in the tundish at high drawing speed. The results show that for small inclusions of 10 μm, the inclusion removal rate is increased by 10% after the porous filtration control device is adopted. Compared with the 45° dip angle filter tundish, the inclusion removal rate of the 55° porous filter tundish increases by about 5.3%, and it's top hole is horizontal, which reduces the risk of slag entrapment and molten steel exposure.According to the RTD curve, the residence time of molten steel is slightly reduced by 30-50 s, and the volume ratio of dead zone is increased by 0.03%, but the inclusion removal rate is obviously improved. Consequently, the macro trend concept of flow field characteristic parameters such as residence time and volume ratio of dead zone can not be used to evaluate precisely the removal efficiency of inclusions in tundish with filter. the micro analysis such as velocity nephogram and inclusion trajectory should be better to evaluate its metallurgical effect of inclusion revomal.

Key words： continuous casting tundish metallurgy ceramic filter flow field inclusion

Received: 05 July 2020

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	Articles by authors
	LIANG Zhen-jiang
	ZHENG Wan
	WANG Jun-chi
	WANG Qiang
	LI Guang-qiang

Cite this article:

LIANG Zhen-jiang,ZHENG Wan,WANG Jun-chi等. Numerical simulation of flow field and inclusion removal in filter controlled flow tundish[J]. CONTINUOUS CASTING, 2021, 40(5): 88-98.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20210080 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I5/88

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