4.3 Other Flotation TechniquesJun 18, 2007 . conventional flotation processes **. The main advantage of using smaller bubbles may be found in an increased recovery rate and possibly.flotation process conventional,Froth flotation - WikipediaFroth flotation is a process for selectively separating hydrophobic materials from hydrophilic. .. In a conventional mechanically-agitated cell, the void fraction (i.e. volume occupied by air bubbles) is low (5 to 10 percent) and the bubble size is.