Full
Outline
To effectively solve the dual technical problems of separation of fluorite, rare earth and minerals containing calcium, barium/strontium separation and separation of fluorite and rare earth in a fluorite-rare earth polymetallic ore in Henan Province, as well as the comprehensive utilization of low-grade molybdenum and lead, the beneficiation process was studied. The grade of CaF2 and REO in the fluorite-rare earth polymetallic ore are 21.73% and 1.56%, respectively, accompanied by molybdenum and lead, and their grades are 0.055% and 0.54%, respectively. The content of calcite and barite in the gangue component is high, and it is closely related to fluorite and rare earth. The principle process of "first flotation enrichment of molybdenum and lead, then recovery of fluorite and rare earth" and the mineral processing scheme of "fluorite and rare earth mixed flotation" + "magnetic-gravity combined separation" were adopted. Modified fatty acid collectors CK-1 and CK-2 were used in combination, and calcium, barium/strontium gangue was strengthened and inhibited by acidified water glass. The whole process closed circuit test obtained lead concentrate with a Pb grade of 55.12% and a Pb recovery rate of 33.63%; molybdenum lead intermediate ore with a Mo grade of 3.28%, a Pb grade of 7.95%, a Mo recovery rate of 56.86%, and a Pb recovery rate of 13.03%; fluorite concentrate with a CaF2 grade of 95.41% and a CaF2 recovery rate of 79.32%; rare earth concentrate with a REO grade of 56.83% and a REO recovery rate of 45.10%. The process realizes the efficient recovery of fluorite and rare earth and the comprehensive utilization of molybdenum and lead, which provides technical support for the development and utilization of the complex polymetallic ore.
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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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