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Aiming at problems of high mud content in tin tailings from Russia, finely disseminated particle size of cassiterite, and influence of sulfur and iron content on tin recovery rate, a combined process consisting of sulfide ore flotation, cassiterite preconcentration, and cassiterite flotation was adopted in a beneficiation test. It is found that the dominant tin mineral in tailings is cassiterite, and sulfide minerals therein include pyrite, pyrrhotite among others, while the dominant gangue includes quartz and tourmaline. The effect of sulfide ore and iron ore on subsequent cassiterite flotation can be reduced by adopting cassiterite preconcentration process for waste discarding. With the cassiterite grading 0.31% Sn, the beneficiation test with a combined process consisting of sulfide ore flotation, cassiterite preconcentration and cassiterite flotation can produce a concentrate grading 5.60% Sn at 34.01% recovery.
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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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