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Outline
Aiming at the problem of low separation accuracy when recovering copper and aluminum particles from lithium iron phosphate batteries by wind specific gravity separation method, heavy liquid separation was conducted on three samples: the copper-aluminum mixture obtained after crushing and screening of battery cells from a factory's battery crushing and sorting system, as well as the copper product and aluminum product obtained from air gravity separation. The results show that at a heavy liquid density of 2.95 g/cm3 and a solid-liquid ratio of 0.35 g/mL, the aluminum recovery rates of the copper-aluminum mixture vary with particle size. For particles >0.630 mm, the Al and Cu recovery rates reach 96.99% and 99.72%, respectively; for particles of 0.630-0.104 mm, the corresponding values are 97.62% and 90.02%. The recovery rates of aluminum and copper are 96.44% and 99.83%, respectively. The aluminum recovery rate of particles greater than 0.630 mm reaches 99.66%, and the copper recovery rate reaches 98.52%. The aluminum recovery rate for particles in the 0.630-0.125 mm size range reaches 90.60%, and the copper recovery rate reaches 96.46%. Copper and aluminum can be obtained from raw materials via heavy liquid separation, and separated from raw materials using the same method. The research results provide a basis for the subsequent separation of black powder and metal particles.
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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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