Air Recovery:Its Significance and Prediction
The air recovery from a flotation cell is the fraction of inlet air which overflows the weir as unbroken bubbles. The air recovery is an important factor in froth phase phenomena; such as gangue entrainment and froth recovery. Increasing the air recovery, results in a higher recovery of attached mineral particles.Air recovery can be measured experimentally on plant using image processing of the top surface of an overflowing froth. The air recovery is directly linked to froth stability and the bursting rate of the bubbles at the froth surface, making it very difficult to predict.Experimental results show a very strong correlation between the superficial velocity of the inlet air and the superficial velocity of the air leaving the cell through the froth surface due to bursting,calculated from the experimentally measured air recovery. This correlation holds over multiple banks from different plants.Development of a power law equation around the inlet air velocity and the bubble solids loading on the froth surface allows the superficial air velocity through the top surface of the froth to be predicted, and from this the air recovery. This model is valid for use when operating beyond the peak in air recovery.
Mineral Processing Froth Flotation Air Recovery
C. Smith S. Neethling J.J. Cilliers
Depanment of Earth Science and Engineering,Royal School of Mines, Imperial College London, London, United Kingdom
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
988-992
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）