Frothers and flotation froth

摘要: Good flotation frothers have branched hydrocarbon radicals and form loosely packed gaseous films at the liquid/gas interface. Their hydrophile-lipophile properties must be properly balanced for most good HLB values are close to 6. This allows them co-operate actively with adsorbed collector in moment of particle-to-bubble attachment. Increasing molecular weight roughly same makes more powerful while those lower selective. Frothers known reduce induction time hence make process kinctically favourable. attachment is now seen as one important mass transfer processes that determine kinetics. The other two mechanisms, non-selective mechanical entrainmcnl dropback from froth slurry depend critically on frother stability cells. In columns, these mechanisms not so since th...