Effect of Metal Ions on Calcite and Magnesite Flotation Behavior
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摘要: 金属阳离子对盐类矿物浮选具有重要影响。通过浮选试验和动电位测试,研究了油酸钠浮选体系中五种金属阳离子( Fe2+、Fe3+、Cu2+、Ca2+和Mg2+)对常见碳酸盐矿物方解石和菱镁矿浮选行为的影响。动电位测试结果表明,五种金属离子都在方解石和菱镁矿表面发生了吸附,但其对方解石和菱镁矿浮选行为的影响不同:Fe2+、Fe3+对方解石和菱镁矿具有明显抑制作用,Cu2+、Ca2+和Mg2+对菱镁矿有一定活化作用, Mg2+抑制了方解石浮选,而Cu2+和Ca2+对方解石浮选影响较小。Abstract: Metal ions have significant effect on the flotation of salt minerals .In this study , the effect of five different metal ions on flotation behavior of two kinds of carbonate minerals , viz, calcite and magnesite was investigated by batch flotation tests and zeta potential measurement .Zeta potential re-sults showed the adsorption of all five metal ions on the surface of calcite and magnesite whereby the potential was observed to increase .But the results obtained by flotation tests showed that , the five metal ions had different effect on the flotation behavior of calcite and magnesite .Fe2+and Fe3+de-pressed calcite and magnesite flotation obviously .Recovery of magnesite was higher in the presence of Cu2+,Ca2+and Mg2+.Mg2+depressed calcite but Cu 2+,Ca2+had little influence on calcite flo-tation.
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