Effects of Picobubbles by Hydrodynamic Cavitation on Coarse Phosphate Froth Flotation
In Floridas phosphate industrial practice, the most favorable upper size limit of froth flotation is 1.18 mm which corresponds to particle weight of about 2.8 mg. Conventional froth flotation is not efficient in upgrading coarse particles (+0.425-1.18 mm). A limited number of studies have been devoted to understanding and improving coarse particle flotation. We have shown that the coarse particle flotation performance can be significantly improved by the presence of picohubbles generated by hydrodynamic cavitation. In this study, the size of picobubbles produced under certain hydrodynamic conditions was measured by a laser particle size analyzer. A size-by-size flotation performance analysis of coarse phosphate froth flotation in the presence of picobubbles is conducted in terms of flotation kinetics, selectivity and recovery. It was found that picobubbles doubled the flotation rate, increased the P2O5 recovery more significantly for +0.85-1.18 mm particles than +0.4250.6 mm and +0.60-0.85 mm particles. At a given acid insolubles (A.I.) rejection, the presence of picobubbles increased the P2O5 recovery by up to about 25%.
Cavitation Coarse Phosphate Particles Flotation Picobubble
M. M. Fan D. Tao
Department of Mining Engineering, University of Kentucky, USA
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1308-1313
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）