Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 666-670.DOI: 10.12068/j.issn.1005-3026.2017.05.012

• Materials & Metallurgy • Previous Articles     Next Articles

Experimental Studies on Asymmetrical Flow and Vortex Slag Entrapment in Continuous Casting Mold

LIU Zhong-qiu, LI Bao-kuan   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2015-12-09 Revised:2015-12-09 Online:2017-05-15 Published:2017-05-11
  • Contact: LIU Zhong-qiu
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Abstract:

The asymmetrical flow inside the mold and the slag entrapment induced by vortex at the top surface have great influences on the quality of continuous casting slab. One vertical-curved mold system was set to study the asymmetrical flow and slag entrapment behaviors. The results show that the asymmetrical flow in the mold is induced by the instability of the flow field itself and the flow pattern is not stationary but changed over frequently. The asymmetrical flow occurs near the bending section of the secondary cooling zone. Although the geometrical and operating conditions were made to be symmetric strictly, the vortex cannot be avoided. In the most cases, only one vortex took place and its size and position varies with time. The probability, size and strength of the symmetric vortex are very small and the durations is also short. Moreover, the effects of casting speed, gas injection rate, immersion depth of nozzle, slide gate opening, and liquid level height of tundish on the periodic asymmetrical flow and slag entrapment are analyzed.

Key words: continuous casting mold, asymmetrical flow, vortex slag entrapment, water model experiment

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