Numerical investigation on particles removal by bubble flotation in swirling flow
He-nan Cui1,2, Tao Li1,2,3, Yu-lin Zhu1,2, Min Tan1,2
1 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China 2 Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing 400044, China 3 College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
Numerical investigation on particles removal by bubble flotation in swirling flow
He-nan Cui1,2, Tao Li1,2,3, Yu-lin Zhu1,2, Min Tan1,2
1 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China 2 Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing 400044, China 3 College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
摘要 The removal of particles is of great importance in many fields including effluent treatment, mineral separation, clean metal production, etc. However, most of the researchers paid their attention to the two-phase flow involving gas–liquid or solid–liquid independently. The motion and interaction between bubbles and particles in the swirling three-phase flow field were simulated by discrete phase model. The swirling flow and the collision between bubbles and particles were governed by compiling the user-defined function program. The centripetal pressure gradient force pushes the discrete phases toward the central region, where the collision rate between particle and bubbles is improved greatly. Moreover, it proved beneficially for particle removal to increase the swirling velocity, particularly for larger particles. Thus, bubble flotation is an effective method to remove particles from the fluid. The swirling velocity was optimized, which is valuable for industrial design.
Abstract：The removal of particles is of great importance in many fields including effluent treatment, mineral separation, clean metal production, etc. However, most of the researchers paid their attention to the two-phase flow involving gas–liquid or solid–liquid independently. The motion and interaction between bubbles and particles in the swirling three-phase flow field were simulated by discrete phase model. The swirling flow and the collision between bubbles and particles were governed by compiling the user-defined function program. The centripetal pressure gradient force pushes the discrete phases toward the central region, where the collision rate between particle and bubbles is improved greatly. Moreover, it proved beneficially for particle removal to increase the swirling velocity, particularly for larger particles. Thus, bubble flotation is an effective method to remove particles from the fluid. The swirling velocity was optimized, which is valuable for industrial design.
He-nan Cui,Tao Li,Yu-lin Zhu, et al. Numerical investigation on particles removal by bubble flotation in swirling flow[J]. Journal of Iron and Steel Research International, 2022, 29(6): 961-972.
2022, Vol. 29 
