The effect of power input on the recovery of coarse particles by flotation is experimentally studied. Complete suspension of the particles is obtained, at two power levels, by modifying the geometry, and hence the hydrodynamics, of a standard mixing vessel. Results are reported for the effect of energy dissipation on flotation recovery for particles up to 600 #mu#m (r.d. 2.5). It is found that better flotation performance is obtained in more quiescent conditions only for particles larger than 450 #mu#m. However, at a lower collector concentration, the effect of power input becomes evident at lower particle sizes.
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