水口不对称侵蚀对大方坯结晶器流场影响规律

doi:10.13228/j.boyuan.issn1005-4006.20230016

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Abstract In order to study the effect of nozzle corrosion on the flow of molten steel in the mold, the mold of 55SiCr spring steel bloom with a cross section of 300 mm×390 mm was used as a prototype, which was studied by physical simulation and numerical simulation. A 1∶1 mold physical simulation experimental device was established, and the effects of casting speed and immersion depth on the mold flow field were obtained. Combined with the anatomical morphology of the nozzle, the corrosion model at the bottom of port of the submerged nozzle was established by Fluent numerical simulation software. The flow field in the mold and the interaction behavior of steel slag interface were simulated by using the combination of k-ε turbulence model and Volume of Fluid model (VOF). The results show that when the casting speed is 0.55 m/min, the average wave height is less than 0.5 mm, and when the immersion depth is 120 mm, the average wave height difference at the measuring point is 0.545 mm. The process parameters suitable for pouring are determined as follows: the casting speed is 0.65 m/min and the immersion depth is 130 mm. Nozzle corrosion will lead to mold bias, stream impact on the wall becomes stronger, velocity uniformity of steel-slag interface becomes worse, local vortex appears, the height difference of steel-slag interface increases from 21 mm to 28 mm, and the liquid surface is exposed.

Key words： bloom mold water simulation nozzle corrosion numerical simulation

Received: 02 March 2023

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	Articles by authors
	SUN Yuqiu
	WANG Min
	ZHAO Jiaqi
	JIANG Luheng
	BAO Yanping

Cite this article:

SUN Yuqiu,WANG Min,ZHAO Jiaqi等. Influence of non-uniform corrosion of refractory material in SEN wall on flow-field of bloom[J]. CONTINUOUS CASTING, 2023, 42(6): 25-35.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20230016 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I6/25

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