Inclusion removal by bubble flotation in continuous casting mold

Lifeng Zhang, Jun Aoki, Brian G. Thomas

Research output: Contribution to journalConference articlepeer-review


Fundamentally-based computational models are developed to quantify the removal of inclusions by bubbles during the continuous casting of steel. First, the attachment probability of inclusions on a bubble surface is investigated based on fundamental fluid flow simulations, incorporating the turbulent inclusion trajectory and sliding time of each individual inclusion along the bubble surface as a function of particle and bubble size. Then, the turbulent fluid flow in a typical continuous casting mold, trajectories of bubbles and their path length in the mold are calculated. The change in inclusion distribution due to removal by bubble transport in the mold is calculated based on the computed attachment probability of inclusion on each bubble and the computed path length of the bubbles. In addition to quantifying inclusion removal for many different cases, the results are important to estimate the significance of different inclusion removal mechanisms. This work is part of a comprehensive effort to optimize steelmaking and casting operations to lower defects.

Original languageEnglish (US)
Pages (from-to)161-177
Number of pages17
JournalMaterials Science and Technology
StatePublished - 2004
EventMaterials Science and Technology, MS and T 2004; Volume 2: AIST/TMS Proceedings - New Orleans, LA, United States
Duration: Sep 26 2004Sep 29 2004


  • Attachment Probability
  • Bubble Flotation
  • Continuous Casting Mold
  • Inclusion Removal

ASJC Scopus subject areas

  • General Engineering


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