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Outline
The silver in a certain silver-polymetallic ore in Heilongjiang Province mainly occurs in sulfide minerals, the iron and manganese mainly occur in carbonate minerals, and a small amount of iron occurs in magnetite. In order to efficiently recover silver, iron and manganese from the ore, a combined flotation-magnetic separation process of silver flotation-iron low-intensity magnetic separation-manganese high-intensity magnetic separation was developed. The beneficiation indexes obtained from the closed-circuit test of the whole process are as follows: the silver grade of the silver concentrate is 3 287.35 g/t, and the recovery rate is 85.82%. The iron grade of the iron concentrate is 60.74%, and the recovery rate of magnetic iron is 79.85%. The manganese grade of the manganese concentrate is 15.03%, and the recovery rate is 76.65%. By optimizing reagent dosage and improving the process configuration in the pilot continuous separation tests, a silver concentrate with a silver grade of 4 120.36 g/t and a recovery rate of 88.75%, an iron concentrate with an iron grade of 62.38% and a magnetic iron recovery rate of 79.42%, and a manganese concentrate with a manganese grade of 15.06% and a recovery rate of 73.97% were obtained. The tailings water after flocculation and sedimentation with polyacrylamide is reused in the whole process, and the fluctuation of concentrate indices is less than 3.0%. The research results can provide a reference for the comprehensive utilization of similar complex mineral resources.
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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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