Rapid Bubble-pulp Separation for Improved Coal Flotation Kinetics.
Paper in Adv in Filtration & Sep Tech Sep; 5:137-146
Coal was used to demonstrate the effectiveness of the rapid flotation system. The best operating conditions of 1.5-Ml/g air-to- ore ratio, 49-w mixing intensity, and 31-cm2 . Min/l ratio of froth separator surface area to flow rate recovered 93 pct of the coal in a concentrate containing only 8.1 pct ash. For the fine-coal material used in this study at 4.5 pct solids, the rapid flotation system was 18 times faster than the conventional coal flotation system. The mixing intensity in the air-injected hydrocyclone bubble-particle attachment unit could be adjusted to obtain the best results. In addition, there was an optimum ratio of froth separator surface area to flow rate for the froth separator. Each of the two unit operations could be independently optimized to provide a rapid flotation process with improved flotation kinetics.
Paper in Adv. in Filtration & Sep. Tech., Vol. 5. Am. Filtration Soc., PP. 137-146