Abstract
In order to improve the separation of dickite from quartz finer than 2 μm, selective flocculation with the polymeric flocculant, Separan AP30, was introduced to the flotation process which includes preconditioning in diluted HCl solution containing CaCl 2. The increase in the flotation recovery of dickite occurred only when Separan AP30 was added after oleate, probably due to an increase in the probability of collision between bubbles and particles through floc formation. The results are consistent with Separan AP30 diminishing the bridging action of hydrolyzed aluminum species between dickite and quartz, resulting in satisfactory selective flotation of dickite from quartz.
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