Full
Outline
In view of the problems of large dosage of reagents and high cost in the traditional lime-free sodium sulfide flotation process of copper-cobalt sulfide ore and sulfur-oxygen mixed copper ore, a study on the optimization and adjustment of the reagent system was carried out at a processing plant in the Democratic Republic of the Congo. The pH and flotation environment of pulp were adjusted by adding lime to reduce the dosage of Na2S. As the amount of lime increases, the dosage of Na2S continues to decrease, and the impact on copper-cobalt recovery is relatively small. However, when the amount of lime increases to a certain value and then increases again, the decrease in Na2S dosage is relatively small, while the cobalt recovery rate of copper-cobalt sulfide ore decreases more significantly, and the copper recovery rates of both ores also show a downward trend. For copper-cobalt sulfide ores, when the lime dosage is 500−700 g/t, the Na2S unit consumption is reduced from 637.71 g/t without lime to 312.48 g/t, and the recovery rates of copper and cobalt are 93.38% and 91.82%, respectively. For sulfur-oxygen mixed copper ore, when the lime dosage is less than 350 g/t, the Na2S unit consumption is decreased from 732.57 g/t without lime to 517.35 g/t, and the copper recovery rate is 86.01%. After the optimization of the reagent system, the cost of flotation reagent for copper-cobalt sulfide ore is reduced from the original USD 1.77 to USD 1.58 per ton, with a decrease of 10.73%. The cost of flotation reagents for sulfur-oxygen mixed copper ore is reduced from the original USD 2.12 to USD 1.74 per ton, with a decrease of 17.92%, all of which have good economic effects.
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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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