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本文评述了金属离子活化石英等矿物的-羟基络合物假说.从溶液化学的角度,考察了氧化物矿物/水界面特性、金属离子在界面的吸附及其对ζ-电位和浮选的影响.研究表明:金属离子对氧化矿浮选的活化作用,不能简单地归因子金属离子-羟基络合物的生成,在很多情况下,金属氢氧化物表面沉淀的生成起着更重要的作用.表面沉淀的形成受界面区域金属离子的活度、界面pH值及界面溶度积的控制.金属离子在氧化矿表面的吸附及其对氧化矿ζ-电位和浮选的影响,与表面沉淀的生成条件,有相对应的关系.
This paper reviews the hydroxyl-complex hypothesis of metal-activated quartz and other minerals. From the perspective of solution chemistry, the characteristics of oxide minerals / water interface, adsorption of metal ions at the interface and their effects on ζ-potential and flotation The research shows that the activation of metal ions on the flotation of oxide ores can not be simply attributed to the formation of the metal ion - hydroxyl complex. In many cases, the formation of metal hydroxides surface precipitation plays a more important role. The formation of surface precipitation is controlled by the activity of metal ions in the interface region, the interface pH and the interfacial solubility product.The adsorption of metal ions on the surface of the oxide ore and its effect on ζ-potential and flotation of the oxide ore, Generate conditions, there is a corresponding relationship.