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摘要:
在矿物浮选过程中，矿浆中的金属离子对矿物浮选行为有重要影响。分析和总结相关文献，综述了金属离子对硅酸盐矿物抑制作用、活化作用、分散行为的影响规律及机理。在不同浮选体系中，金属离子以络合物或沉淀吸附于矿物表面，通过消耗浮选药剂，改变矿物表面电性等方式，来影响矿物浮选行为。金属离子改变矿物表面电性，影响硅酸盐分散行为，金属氢氧化物沉淀通过桥连作用促使矿物聚沉。金属离子的干扰作用一般采用沉淀、络合或屏蔽法消除。
Abstract:Metal ions existed in the pulp tend to have a significant impact on the flotation behavior of minerals in the flotation process. Based on the summary and analysis of related literatures, the influence law and underlying mechanism of metal ions on depression, activation and decentralization of silicate were reviewed in this work. Metal ions adsorb on minerals in the form of complexes or precipitates in different flotation system, and affect the mineral flotation by consuming reagents, changing surface electricity of minerals. The change of surface electrical properties of minerals by metal ions will affect the dispersion behavior of silicates. The bridging role of metal hydroxide precipitation promotes the coagulation of minerals. The interference of metal ions can be eliminated by precipitation interaction, complexing reaction and shielding effect.
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Key words:
- metal ion /
- depression /
- activation /
- dispersion /
- flotation
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