Collectorless Flotation in the Presence of Sodium Sulphide

Abstract

The sodium sulphide-induced collectorless flotation of several minerals are first introduced in this chapter. The results obtained are that sodium sulphide-induced collectorless flotation of sulphide minerals is strong for pyrite while galena, jamesonite and chalcopyrite have no sodium sulphideinduced collectorless flotability. And the nature of hydrophobic entity is then determined through E_h-pH diagram and cyclic voltammogram, which is element sulphur. It is further proved with the results of surface analysis and sulphur-extract. In the end, the self-induced and sodium sulphide-induced collectorless flotations are compared. And it is found that the order is just reverse in sodium sulphide-induced flotation to the one in self-induced collectorless flotation.