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The SICOMINES copper and cobalt ore in the Democratic Republic of Congo has a Cu content of 2.47% and a Co content of 0.237%, belonging to high oxidation rate and complex mineral composition ores. In response to the high cost of single flotation beneficiation and low recovery rate of copper and cobalt, combined with the properties of the ore, a flotation-magnetic separation combined process was used for beneficiation experimental research. By conducting experiments on the types and dosages of collectors and vulcanizing agents, the optimal process parameters were determined as follows: the dosage of pentyl xanthate collector is 1 185 g/t, and the dosage of combined vulcanizing agent (sodium sulfide : sodium hydrosulfide = 1:1) is 7 000 g/t. When the grinding particle size of the raw ore is –0.074 mm accounting for 70%, the stepwise sulfurization flotation method is firstly used to recover the easily floatable copper sulfide concentrate, copper oxide concentrate, and cobalt concentrate. Then, the flotation tailings are subjected to strong magnetic separation treatment to recover the copper cobalt magnetic minerals. Finally, the total copper recovery rate is 79.83% and the total cobalt recovery rate is 54.79%, achieving the comprehensive and efficient utilization of high oxidation rate copper cobalt ore 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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