Research progress of dynamic interaction process between flotation particles and bubbles

The interaction between particles and bubbles plays an important role in the flotation process, and whether effective adhesion or not is the key to determining the flotation efficiency. High-speed photography technology can directly observe the bubble-particle interaction dynamical microscopic process, which has a wide application in particle-bubble collision, adhesion, and three-phase contact line (TPC) formation, desorption and etc. This paper mainly summarizes the research progress of particle-bubble interaction based on high-speed photography technology. The particle-bubble collision and adhesion process are observed by the particle sedimentation method, and the TPC formation process is researched by the single bubble rise method, and the particle desorption process and adhesion force are found by the single-bubble driving method. These research results suggest that the shape and roughness of the particles, the size and movement speed of the bubbles, the concentration and type of surfactants, and the hydrophobicity of minerals would all have an important impact on the process of collision, adhesion and desorption between particle and bubble. © 2022, China Science Publishing & Media Ltd. All right reserved.