Abstract The dissolution behavior and surface composition of galena and pyrite in their coexisting flotation system were studied by metal ion releasing experiment and XPS analysis, to reveal the influence of galvanic interaction on their flotation. The results indicated that the dissolution of lead ions from galena surface was strongly enhanced in the presence of pyrite, significantly depending on the pyrite content. The dissolution of iron ions from pyrite surface was also enhanced in the presence of galena, but the effect of galena content was small. XPS analysis verified that the galvanic interaction enhanced the galena oxidation, leading to an increase in oxysulfide/hydroxide components on its surface. However, the galvanic interaction only had little impact on the pyrite oxidation, other than the migration and adsorption of lead ions. This work demonstrated that the galvanic interaction between galena and pyrite altered their surface components and increased the difficulty in flotation separation process.

中文翻译：

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电偶相互作用对浮选系统方铅矿和黄铁矿溶解和表面成分的影响

摘要 通过金属离子释放实验和XPS分析研究方铅矿和黄铁矿在共存浮选体系中的溶解行为和表面组成，揭示电偶相互作用对其浮选的影响。结果表明，在黄铁矿的存在下，方铅矿表面铅离子的溶解显着增强，这显着取决于黄铁矿的含量。方铅矿的存在也促进了黄铁矿表面铁离子的溶解，但方铅矿含量的影响较小。XPS 分析证实，电偶相互作用增强了方铅矿氧化，导致其表面氧硫化物/氢氧化物成分增加。然而，除了铅离子的迁移和吸附外，电偶相互作用对黄铁矿氧化的影响很小。