Analyzing flotation bubble breakup behavior in stirring equipment based on SST k-ω model and VOF model

Le résumé fourni par la source

Flotation is a pivotal technique for separating fine, low-grade minerals, where bubble dynamics and breakup mechanisms critically influence efficiency and selectivity. This study employs the SST k-ω turbulence model and VOF model to explore multiphase flow characteristics in a stirring tank at various impeller speeds, analyzing bubble ascent and breakup behavior. Results show intense bubble breakup regions coincide with vortex-rich areas, highlighting the crucial role of tail vortices. Further analysis reveals that turbulent breakup mechanisms are driven by rotational flows and shear flows caused by vortex interactions. Viscous shear stress from tail vortices is identified as the primary driver 006Ff bubble breakup. The mechanisms of bubble breakup vary with location relative to the impeller, providing a theoretical basis for optimizing flotation equipment. This study enhances the recovery rates of low-grade minerals and improves the selectivity and efficiency of the flotation process.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.