Arsenopyrite enrichment by column flotation (original) (raw)

Arsenic-rich, gold-bearing pyrite concentrates may be further enriched in arsenic W assist subsequent Au beneficiation. Among several amines tested in refloating a local Chalkidiki pyrite concentrate, 2-coco 2-methyl ammonium chloride proved successful by raising the grade from 9% to 22%, although total solids recovery was low. The use of a frothstabilizing frother was also beneficial to the process. Optimum hydrodynamic conditions were : intermediate pulp fiowrate, low wash water and gas flowrate; the latter abated the mixing~dispersion process in the collection zone.