Investigation of condition-induced bubble size and distribution in electroflotation using a high-speed camera  

作　　者：Ren Liuyi Zhang Yimin Qin Wenqing Bao Shenxu Wang Peipei Yang Congren 

机构地区：[1]College of Resources and Environment Engineering,Wuhan University of Technology [2]School of Minerals Processing and Bioengineering,Central South University

出　　处：《International Journal of Mining Science and Technology》2014年第1期7-12,共6页矿业科学技术学报（英文版）

基　　金：the National Natural Science Foundation of China (No.50774094);the Ministry of Science and Technology of China (No.2011BAB05B01) for financial support

摘　　要：In the flotation process, bubble is a key factor in studying bubble-particle interaction and fine particle flo- tation. Knowledge on size distribution of bubbles in a flotation system is highly important. In this study, bubble distributions in different reagent concentrations, electrolyte concentrations, cathode apertures, and current densities in electroflotation are determined using a high-speed camera. Average bubble sizes under different conditions are calculated using Image-Pro@ Plus （Media Cybernetics@, MD, USA） and SigmaScan@ Pro （Systat Software, CA, USA） software. Results indicate that the average sizes of bubbles, which were generated through 38, 50, 74, 150, 250, 420, and 1000 μm cathode apertures, are 20.2, 29.5, 44.6, 59.2, 68.7, 78.5, and 88.8 μm, respectively. The optimal current density in electroflotation is 20 A/m2. Reagent and electrolyte concentrations, current density, and cathode aperture are important factors in controlling bubble size and nucleation. These factors also contribute to the control of fine- Particle flotation.In the flotation process,bubble is a key factor in studying bubble-particle interaction and fine particle flotation.Knowledge on size distribution of bubbles in a flotation system is highly important.In this study,bubble distributions in different reagent concentrations,electrolyte concentrations,cathode apertures,and current densities in electroflotation are determined using a high-speed camera.Average bubble sizes under different conditions are calculated using Image-ProòPlus(Media Cyberneticsò,MD,USA)and SigmaScanòPro(Systat Software,CA,USA)software.Results indicate that the average sizes of bubbles,which were generated through 38,50,74,150,250,420,and 1000 lm cathode apertures,are 20.2,29.5,44.6,59.2,68.7,78.5,and 88.8 lm,respectively.The optimal current density in electroflotation is20 A/m2.Reagent and electrolyte concentrations,current density,and cathode aperture are important factors in controlling bubble size and nucleation.These factors also contribute to the control of fineparticle flotation.

关 键 词：High-speed camera Bubble Electroflotation Fine particle Bubble production and control 

分 类 号：TD923[矿业工程—选矿]