论文部分内容阅读
The collectorless flotation behaviors of sphalerite in the presence of Cu 2+ ions have been established. The effects of pH, potential and Cu 2+ 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 x S) and Cu poly sulfide (Cu y+z S 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.
The effects of sphalerite in the presence of Cu 2+ ions have been established. The effects of pH, potential and Cu 2+ concentration on the flotation have been studied using a micro flotation cell specially designed, where the potential can be controlled by The flotation results have shown that the Cu activated sphalerite displays a good collectorless floatability in a pH range of 0 ~ 13. The higher potential can improve the flotation recovery. The surface species formed during the Cu ion activation have been examined using a Zinc deficient sulfide (Zn 1- x Cu x S) and Cu poly sulfide (Cu y + z S y) species have been determined. They are for the collectorless flotation of sphalerite. , they can improve the conductivity of the sphalerite surface.