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| Mechanism Study of Effect of Grinding Mode on Sphalerite Inhibitors |
| Received:May 06, 2019 Revised:May 06, 2019 |
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| DOI：doi:10.3969/j.issn.1671-9492.2019.05.014 |
| KeyWord:grinding method; sphalerite; inhibition mechanism; Raman spectrum |
| Author | Institution |
| Liang Chaosheng |
Inner Mongolia University of Science and Technology |
| Wang JIanying |
Inner Mongolia University of Science and Technology |
| Zhang Xuefeng |
Inner Mongolia University of Science and Technology |
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| Abstract: |
| In the separation of chalcopyrite from sphalerite in the Cu-Zn associated mine by flotation, depression of sphalerite by inhibitors is the key. To enhance the activity of sphalerite inhibitors, two comminution methods, waterjet grinding and ball grinding, are studied for their effect on the inhibitor efficiency through single mineral flotation test and SEM and Raman spectrum analysis. Flotation result showed that at absence of inhibitors the waterjet product gives much higher yield than the ball grinding product while with presence of inhibitors waterjet product produces much lower recovery. The out-performance of waterjet grinding product over ball grinding product indicates the natural surface of sphalerite being better kept in waterjet grinding than in the ball grinding. Raman spectrum analysis showed that association of the inhibitor with sphalerite minerals was sthonger for the product of waterjet grinding. Chemical reactions are found to take place on the surfaces between mineral particles and between mineral and iron balls, generating large amount of hydrophobic hydroxyl iron compounds that interfere with the action of the inhibitors resulting in low inhibition efficiency. |
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