废旧塑料浮选回收中气泡?颗粒粘附行为的研究

In this paper………..(10 Points, Times New Roman) In order to study adhesion behavior of bubbles in the sphere, three kinds balls of plastics PP, PE, PTFE were studied in this paper. Surfactants sodium dodecyl benzene sulfonate(SDBS), Tea saponin(Tea Saponin) were chose as flotation agents in this study. Effects of parameters such as the concentration of surfactant, plastic material, etc. On adhesion behavior of a single bubble in the plastic ball were investigated in a laboratory especially designed flotation column by high-speed camera and image processing software and then find out the factors that influence the plastic flotation.Results of research showed that: ① Different plastic material had a certain influence on the bubble adhesion behavior. The visual process of single bubble impact different spherical was consistent, the change trend of the speed is the same.The difference is that bubble rebound velocity and kinetic energy dissipation were different with the difference of material, then three-phase contact time is different; ② The concentration of surfactants had a significant impact on bubble adhesion behavior. The velocity of bubble collision and rebound would decrease with the increase of SDBS solution concentration, and maximum bounce distance was reduced, there is less number of collision and rebound, bubble kinetic energy dissipation increased gradually. When the concentration reached a certain value, there is no longer three-phase contact occurring between the bubble and PP sphere