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| Mineralogical analysis of refractory tailings in a gold mine |
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Received:December 22, 2021
Revised:December 31, 2021
Accepted:January 06, 2022
Published Online:April 27, 2022
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| DOI： |
| KeyWord:BPMA; gold minerals; process mineralogy; occurrence; dissemination characteristics; |
| Author | Institution |
| LI Guangsheng |
Shandong Gold Group |
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| Abstract: |
| The gold grade of a quartz vein type gold mine is 7.62 g/t. After separation by gravity separation + flotation, the gold grade of its tailings is 0.75 g/t, and the total recovery is about 90.50% . In order to further study the recoverable value of gold in tailings, process mineralogy study was carried out to find out the mineralogical factors affecting the loss of gold in the process of separation. The process mineralogy of tailings was analyzed by automatic process mineralogy analyzer (BPMA) , sem eds and XRD. The results show that the gold minerals in the tailings are mainly natural gold and occasionally silver gold, and the gold minerals are mainly in the form of the bare intergrowth with Gangue, secondly in the gangue minerals, and a small amount of them are monomers In addition, a small amount of gold in the form of submicroscopic gold is distributed in pyrrhotite-based Sulfides, and the size of gold minerals is extremely fine, mostly distributed below 10 μm, and nearly half of them distributed below 5 μm. The Lost Gold Minerals exist mainly in the form of intergrowth with gangue, and the grain size is very fine. It is difficult to recover gold further by regrinding-flotation. |
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