Full
Outline
In response to the issue that traditional beneficiation processes and direct leaching methods are difficult to achieve economically effective recovery for a certain low-grade and refractory molybdenum oxide ore, based on its process mineralogical characteristics, the application of superconducting magnetic separation for pre-enrichment of the low-grade and refractory molybdenum oxide ore was studied. The effects of magnetic separation conditions such as background magnetic field strength, slurry flow velocity, separation slurry concentration, slurry feeding method and other magnetic separation conditions on the pre-enrichment concentrate indicators were investigated. The results show that by adopting the upper feeding method and under the suitable conditions of background magnetic field strength of 4 T, slurry flow velocity of 0.025 m/s, and separation slurry concentration of 10%, the pre-enrichment concentrate has Mo grade of 0.75% and recovery rate of 64%. Through theoretical calculation and recovery mechanism analysis of the magnetic separation recovery process, a high-efficiency separation scheme is optimized and designed, which includes coarse (-0.5 mm+0.025 mm) and fine (-0.025 mm) particle size classification and separation processes, as well as the coordinated matching of high magnetic field strength (5 T) and high flow rate (0.04 m/s). The final process indicators are:Mo grade in the concentrate of 0.88%, recovery rate of 63.79%, and enrichment ratio of 3.95. The method can achieve the goal of efficient pre-enrichment of low-grade and refractory molybdenum oxide ores, meet the feed grade requirements of subsequent leaching processes, and has certain application potential.
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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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