The effect of froth residence time on the kinetics of flotation

摘要: Abstract Previous studies by the authors have shown that there is a strong correlation between overall flotation rate constant k and bubble surface area flux, S b , in cell, this relationship independent of impeller type. More recently it was found results obtained from 250 litre cell 3 m treating same feed could be represented k-S relationship, as long ratio froth height to superficial gas cells same. This termed residence time, τ fg . paper examines effect on kinetics flotation, re-evaluating re-interpreting these results. It decreases exponentially with but dependent size therefore not directly useful for scale-up. When divided typical dimension take into account transportation distance different sizes, “specific time” fits data better size. Finally, when are evaluated terms time calculated basis concentrate slurry flow rate, fitting od very much again. The implications relationships modelling scale-up discussed.