控流装置对四流中间包钢水洁净度的影响

doi:10.13228/j.boyuan.issn1005-4006.20220035

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Abstract In order to study the influence of flow control device on the water cleanliness of steel tundish, the method of numerical simulation and industrial test verification was used to optimize the billet continuous casting tundish. The response time was increased by 5 s and the peak time was increased by 371 s by adding a U-shaped retaining wall to the prototype tundie, which improved the short-circuit flow phenomenon of molten steel in the tundie,and the average residence time increases by 53 s, the dead zone volume fraction decreases by 4.1%, and the piston zone volume fraction increases by 17.3%, which improves the floating condition of inclusions. The consistency level of each flow is also improved.The results of industrial tests show that the inclusion removal rate of molten steel in the tundie increases by 29.05% when the U-shaped retaining wall is added between the receiving zone and the pouring zone, the maximum size of inclusion in each zone of the tundie decreases by 26 μm, the inclusion removal rate on the billet increases by 38.42%, and the maximum size of inclusion on the billet decreases to less than 16 μm. The use of U-shaped retaining wall in tundish improves the cleanliness of molten steel and the quality of billet.

Key words： tundish U-shaped retaining wall numerical simulation industrial test cleanliness

Received: 07 March 2022

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	LIU Xi-mao

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LIU Xi-mao. Effect of flow control device on steel cleanliness in four-flow tundish[J]. CONTINUOUS CASTING, 2022, 41(5): 88-94.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20220035 OR http://www.chinamet.cn/Jweb_lz/EN/Y2022/V41/I5/88

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