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| The effect of citric acid on the flotation separation of serpentine from pentlandite |
| Received:October 25, 2015 Revised:August 25, 2016 |
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| DOI： |
| KeyWord:serpentine; pentlandite; hetero-aggregation; citric acid, |
| Author | Institution |
| Feng bo |
江西理工大学 江西省矿业工程重点实验室;、西部矿业股份有限公司青海省高原矿物加工工程与综合利用重点实验室 |
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| Abstract: |
| The effect of citric acid on the flotation separation of serpentine from pentlandite were investigated through flotation experiments, sedimentation experiments, adsorption experiments, XPS analysis, zeta potential measurements and calculations of DLVO theory, and the mechanism was discussed. The results showed that the hetero-aggregation between serpentine and pentlandite results in the attachment of serpentine slimes on pentlandite surface and changed the surface characteristics of pentlandite, thus decreased the pentlandite flotation recovery. However, the serpentine leached by citric acid doesn’t influence pentlandite flotation. The mechanism studies demonstrate that citric acid can dissolve magnesium ions from serpentine surface and adjust the surface potential of serpentine, thus changes the interaction energy between serpentine and pentlandite particles from attractive energy to repulsive energy and eliminate the depression effect of serpentine to pentlandite. |
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