GALVANIC INTERACTION OF CONTACTING SULFIDE PARTICLE AND ITS EFFECT ON FLOTATION

来源期刊：中国有色金属学报(英文版)1998年第4期

论文作者：Qin Wenqing Qiu Guanzhou Xu Jing Hu Yuehua

文章页码：661 - 665

Key words：galena,　pyrite,　galvanic interaction

Abstract: Electrochemical aspects of the interaction between galena and pyrite were shown by the corrosive wear and changes in floatability. Rest potential, mixed potential, galvanic current and mixed polarization measurements were used to study the galvanic interaction of the galena and the pyrite electrode. The Evans diagrams of galena-pyrite electrode couples in the absence or the presence of butyl xanthate were given. In any galvanic combination involving these two minerals, the preferential anodic oxidation would occur on the surface of galena, and anodic corrosion rate for galena would accelerate 8~12 times. Galvanic contact between the galena and the pyrite was found to affect the floatability of them. The results of flotation test showed that the floatability of galena contacting with pyrite is improved, and the floatability of pyrite is weakened. Possible electrochemical mechanism involved are outlined.