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Outline
To improve the recovery of associated precious metal Ag from an overseas lead-zinc ore, mineral processing tests were carried out based on raw ore process mineralogy. The results show that silver mainly occurs as exposed silver sulfide and encapsulated silver in sulfides. A process consisting of decarbonization and lime-free lead flotation was adopted, with aniline dithiophosphate as a collector, and zinc depressant CB-1 and auxiliary zinc depressant W-1 added in the roughing of lead flotation. As a result, a lead concentrate grading 56.70% Pb, 8.93% Zn and 1 432.30 g/t Ag was obtained, with corresponding recoveries of 80.73%, 2.13% and 59.07%, respectively. It is concluded that compared with the original lime-based process, the recoveries of Pb and Ag can be increased by 2.80 and 4.83 percentage points respectively, while in the lead concentrate, Zn grade can be decreased by 1.30 percentage points and Ag grade up by 35.80 g/t.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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