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The leaching of manganese from electrolytic manganese residue with sulfuric acid was studied, and the process parameters were optimized by single factor test and orthogonal test. The phase, structure, morphology and leaching kinetics of electrolytic manganese residue before and after leaching were analyzed. The leaching model was established and the leaching mechanism was explored. The results show that under the optimal conditions of particle size of 200 mesh, stirring speed of 400 r/min, leaching temperature of 95 ℃, sulfuric acid concentration of 1.5 mol/L, leaching time of 120 min and liquid volume/solid mass ratio of 11/1, the leaching rate of Mn can reach 97.90%. Manganese leaching kinetics accords with the liquid-solid shrinkage model and is controlled by chemical reaction. In the process of manganese leaching, the leaching rate of Mn can be improved by controlling the liquid volume/solid mass ratio and temperature.
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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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