ABSTRACT
Flotation rate constant in pulp is very sensitive to both particle and bubble sizes. The kinetic flotation experiments were carried out under free and hindered conditions both in apparatus for frothless flotation with aerators producing single bubbles and swarms of bubbles of the specified size, and in froth flotation apparatus of a special design. As the collector dosage increases, the highest flotation rate is observed in the coarse size fractions which are in good agreement with the results obtained by many researchers. Experiments on flotation of different size fractions of coal with the co- and counter-current flows of phases demonstrated better floatability of the coarse size fractions with the parallel flows of the slurry and air, as compared to the counter-current regime. Flotation was carried out in two reagent regimes: in the first case under conventional conditions, in the second, selective flocculation of the cassiterite particles was carried out prior to flotation.
