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Outline
Based on the problems at the Huangshaping Polymetallic Concentrator, where excessive use of sodium sulfide in the bulk flotation process led to difficulties in bismuth-sulfur separation and the accumulation of a large amount of low-grade bismuth middlings, process optimization research for molybdenum-bismuth-sulfur separation was carried out following a process mineralogy study of the raw ore. The results show that the raw ore contains 0.061％ of Mo and 0.048％ of Bi. Using reagents B11 and CK-S and adopting the process flowsheet of grinding-iron removal-molybdenum-bismuth iso-flotation-separation of Mo-Bi bulk concentrate-sulfur flotation from iso-flotation tailings, a molybdenum concentrate with a grade of 38.57％ Mo and a recovery rate of 45.10％ has been obtained, as well as a bismuth concentrate with a grade of 37.21％ Bi and a recovery rate of 68.38％. The tailings from Mo-Bi flotation can be further processed through one roughing, three cleaning, and two scavenging stages to produce a sulfur concentrate with S grade of 23.17％ and a recovery rate of 32.66％. Compared with the original process, the new process significantly increases the bismuth grade from 4.86％ to 37.21％, and adds a saleable sulfur concentrate product. Efficient recovery of bismuth and sulfur has been achieved, effectively solving the problems of low recovery rate and serious resource waste in the original process.
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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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