The Effect of Particle Shape and Hydrophobicity in Flotation
The effect of particle shape on the flotation process has been investigated in laboratory experiments with rnonosized spherical ballotini and roughly ground ballotini. The particles were treated by partial methylation with trimethylchlorosilane to achieve varying degrees of hydrophobicity. In flotation, the process of film thinning and liquid drainage is critical in the formation of a stable bubble-particle attachment and this is affected by the particle shape and surface hydrophobicity. The rate of attachment affects the overall flotation rate. Flotation tests with different particle sizes at various degrees of partial methylation have been performed in a modified Denver cell. Predictions from a computational fluid dynamic model of the cell which incorporates fundamental aspects of bubble-particle attachment are compared against flotation test results. Contact angles of the particles have also been measured using the capillary rise technique to indicate surface hydrophobicity.
Flotation Particle shape Hydrophobicity Modelling
P.T.L. Koh F.P. Hao L.K. Smith T.T. Chau W.J. Bruckard
CSIRO Minerals, Australia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
979-987
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）