Nanobubble generation and its application in froth flotation (part I): nanobubble generation and its effects on properties of microbubble and millimeter scale bubble solutions  

作　　者：FAN Maoming TAO Daniel HONAKER Rick LUO Zhenfu 

机构地区：[1]Department of Mining Engineering, University of Kentucky, Lexington KY40506, USA [2]CPT, Eriez Manufacturing Co., Erie PA 16514, USA [3]School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China

出　　处：《Mining Science and Technology》2010年第1期1-19,共19页矿业科学技术（英文版）

基　　金：the Florida In-stitute of Phosphate Research (FIPR);the Center for Advanced Separation Technologies (CAST);the National Natural Science Foundation of China (Nos.50921002 and 90510002) for the financial support

摘　　要：A special nanobubble generation system has been developed for evaluating the effect of nanobubble on froth flotation. In this study, an eight-factor five-level Central Composite Experimental Design was conducted for investigating eight important parameters governing the median size and the volume of nanobubbles. These process parameters included surfactant concentration, dissolved oxygen (O2) content, dissolved carbon dioxide gas (CO2) content, pressure drop in cavitation tube nozzle, <50 nm hydrophobic particle concentration, <50 nm hydrophilic particle concentration, slurry temperature and the time interval after nanobubble generation. The properties, stability and uniformity of nanobubbles were investigated. The study of the produced nanobubble’s effects on the characteristics of microbubble solutions and millimeter scale bubble solutions was performed in a 50.8 mm column.A special nanobubble generation system has been developed for evaluating the effect of nanobubble on froth flotation. In this study, an eight-factor five-level Central Composite Experimental Design was conducted for investigating eight important parameters governing the median size and the volume of nanobubbles. These process parameters included surfactant concentration, dissolved oxygen （O2） content, dissolved carbon dioxide gas （CO2） content, pressure drop in cavitation tube nozzle, 〈50 nm hydrophobic particle concentration, 〈50 nm hydrophilic particle concentration, slurry temperature and the time interval after nanobubble generation. The properties, stability and uniformity of nanobubbles were investigated. The study of the produced nanobubble＇s effects on the characteristics of microbubble solutions and millimeter scale bubble solutions was performed in a 50.8 mm column.

关 键 词：NANOBUBBLE CAVITATION Zeta potential MICROBUBBLE froth flotation 

分 类 号：O6-3[理学—化学] TD94[矿业工程—选矿]