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In order to comprehensively recover the valuable components from decommitted high-nickel ternary lithium batteries,lithium was selectively extracted by sulphation roasting and water leaching, and the water leaching residue was then processed by aging leaching,impurity removal and coprecipitation to prepare nickel-cobalt-manganese hydroxide. The results show that the optimum conditions of sulfation roasting are n(H2SO4)∶n(Li)=1.4∶1, roasting temperature of 600 ℃, roasting time of 1 h, and the water leaching rate of Li, Mn can reach 94.36%, 11.03%, respectively, Ni and Co hardly leaching. Under the conditions of acid-ore ratio of 1.74, curing temperature of 120 ℃, curing time of 120 min and liquid volume to solid mass ratio of 7.5 mL/1 g, the aqueous leaching slag is cured and acid leaching. The leaching rates of Li, Ni, Co, Mn, Cu, Fe and Al are 97.86%, 89.16%, 95.09%, 100%, 63.6%, 99.71% and 56.76%, respectively. Under the optimum conditions of pH=3.38, precipitation temperature of 60 ℃ and precipitation time of 60 min, the precipitation rates of Fe, Al and Cu in the solution can reach 100%, 98.07% and 82.51%, respectively. Nickel cobalt manganese hydroxide can be formed by co-precipitation after pH adjustment. Under the optimal conditions of pH=9.44, co-precipitation temperature of 55 ℃ and co-precipitation time of 120 min, the precipitation rates of Ni, Co and Mn can reach 99.6%, 100% and 98.72%, respectively.
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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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