Full definition
Physico-chemical mineral concentration process exploiting surface wettability differences between valuable minerals and gangue. Reagents (collectors, frothers, depressants, pH modifiers) are added to the pulp and air is injected. Hydrophobic mineral particles (coated by collector) attach to bubbles and float as froth; hydrophilic gangue sinks. Dominant for Cu, Zn, Pb, Mo, Ni. Recoveries: 80–95%. Reagent brands: Cytec Solvay, Clariant.