钢包浇注过程中旋涡临界高度控制

doi:10.13228/j.boyuan.issn0449-749x.20200505

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Abstract To control the critical height of the sink vortex during the ladle teeming, a 1∶3 water model has been established for a 150 t industrial ladle to study the effects of the ladle initial liquid level, residence time, nozzle location and structure, and anti-vortex device on the formation and evolution of the vortex based on the similarity principle. The results show that the residence time of the ladle and the location of the nozzle will exert an important influence on the vortex formation rather than the initial liquid level. With the increase of the residence time, the starting height of the sink vortex gradually increases, while the critical penetration height first increases and then decreases; the vortex critical height gradually decreases with the increasing nozzle eccentricity. By comparing the nozzle types, it is found that the trapezoidal nozzle and square nozzle can reduce the critical height of the vortex by a small amount. A cylindrical anti-vortex device is proposed, and the critical penetration height of the vortex has been reduced by 78.2% with it. The industrial practice shows that the vortex occurrence rate at high casting speed (1.4-1.6 m/min) can be reduced from 8.6%-12% to 1.96% by using this device.

Key words： ladle casting process physical modeling sink vortex critical height

Received: 30 September 2020

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	Articles by authors
	HU Qun
	TANG Hai-yan
	LI Xiao-song
	ZHANG Jia-quan
	BAO Wei-feng
	JIANG Xian-xun

Cite this article:

HU Qun,TANG Hai-yan,LI Xiao-song等. Control on vortex critical height during a ladle teeming[J]. Iron and Steel, 2021, 56(6): 35-41.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200505 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I6/35

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