Numerical study of inclusion removal in steel continuous casting mold considering interactions between bubbles and inclusions

Qingrui Lai, Zhiguo Luo, Qinfu Hou, Tao Zhang, Xiaoai Wang, Zongshu Zou

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)


Bubble coalescence-breakup and bubble-inclusion interaction models were implemented into Eulerian-Lagrangian models of steel liquid flow and discrete particles transport, which was applied to examine the interaction and removal of discrete bubbles and inclusions during continuous casting. Bubble distribution affected by coalescence-breakup and its connection with the inclusion removal rate were analyzed. The inclusion removal rates at different initial bubble diameters and inclusion diameters were predicted. Larger inclusions have a higher removal rate and the predicted removal rates ranging from 14% to 30% agree well with industrial experiment measurements. It is also found that smaller bubbles have a higher capacity to remove inclusions and very small bubbles may cause more production defects when it is attached to inclusions. These results show that the developed model can reasonably predict the behaviors of discrete bubbles and inclusions and their interactions in molten steel. Such a model should be useful for the operation of steel continuous casting.

Original languageEnglish
Pages (from-to)2062-2070
Number of pages9
JournalISIJ International
Issue number11
Publication statusPublished - 1 Nov 2018


  • Breakup
  • Bubble coalescence
  • Bubble-particle interaction
  • Inclusion removal
  • Steel continuous casting

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