An electrochemical investigation on collectorless flotation of sphalerite in presence of Cu²⁺ ions

来源期刊：中国有色金属学报(英文版)2000年第z1期

论文作者：刘如意 孙水裕 宋卫锋

文章页码：56 - 60

Key words：collectorless flotation； sphalerite； copper activation； electrochemical measurement

Abstract: The collectorless flotation behaviors of sphalerite in the presence of Cu²⁺ ions have been established. The effects of pH, potential and Cu²⁺ concentration on the flotation have been studied using a micro flotation cell specially designed, where the potential can be controlled by a potentiostat. The flotation results have shown that the Cu activated sphalerite displays a good collectorless floatability in a pH range of 0～13. The higher potentials can improve the flotation recovery. The surface species formed during the Cu ion activation have been examined using a special electrochemical technique—a composite sphalerite electrode. Zinc deficient sulfide (Zn_{1- x}Cu_xS) and Cu poly sulfide (Cu_y+zS_y) species have been determined. They are responsible for the collectorless flotation of sphalerite. In additional, they can improve the conductivity of the sphalerite surface.