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Outline
The leaching of valuable metals from low-grade lead matte using hydrochloric acid and hydrogen peroxide mixed solution was studied. The effects of initial mass concentration of hydrochloric acid, hydrogen peroxide dosage, ratio of liquid volume to solid mass, leaching temperature and time on the leaching rates of copper, iron and lead were investigated. The results show that under the optimum conditions of hydrochloric acid mass concentration of 150 g/L, hydrogen peroxide to lead matte mass ratio of 3∶1, liquid volume to solid mass ratio of 9∶1, leaching temperature of 50 ℃ and leaching time of 2 h, the leaching rates of Cu, Fe and Pb can reach 90.21%, 33.49%, 31.19%, respectively, and Au and Ag are enriched in the resiclue. Efficient separation from copper is achieved.
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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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