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Outline
Chengchao Mining Company adopts the principle flotation flowsheet of bulk flotation followed by separation to recover valuable resources such as copper and sulfur from iron tailings, but the copper recovery rate is relatively low. Therefore, aiming at the bulk flotation concentrate, the effects of factors such as regulators, depressants, collectors and pulp mass concentration on the separation flotation performance of copper and sulfur were studied in detail through tests. The results show that the optimal separation flotation conditions are as follows: pulp mass concentration of 30%, activated carbon dosage of 120 g/t, quicklime dosage of 6 000 g/t, and Z-200 dosage of 30 g/t. Under these flotation conditions, by adopting the process flowsheet of one roughing, two cleanings, one scavenging and sequential return of middle ore, a copper concentrate with a Cu grade of 16.00% and a Cu recovery rate of 54.87% can be obtained. A sulfur concentrate with a sulfur grade of 35.10% and a sulfur recovery rate of 33.57% can be obtained. The copper content of the flotation tailings is 0.013% and the sulfur content is 6.89%, among which the copper content in sulfides is 0.006 3%. 97.97% of the sulfur element exists mainly in sulfates, which indicates that the adopted reagent system and flotation process flowsheet can fully recover copper and sulfur from iron tailings.
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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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