| abstract |
Manganese-lithium separation and pre-extraction liquid preparation processes in comprehensive recovery of ternary battery waste, and a method for comprehensive recovery of cobalt-nickel-manganese-lithium elements from ternary battery waste, relating to a method for recycling battery waste, and solving the problem, existing in the prior art, of high recovery costs caused by the fact that extraction and reverse-extraction process routes must be performed for recovery of cobalt-nickel-manganese elements. Cobalt and nickel ions are separated, by means of a hydrolysis method, from an impurity removal solution, and ions such as manganese and lithium ions in the impurity removal solution are not subjected to an extraction process, so that most of manganese ions are separated and removed by using a wet method before extraction, preventing the manganese ions from entering the extraction system; and regarding nickel ions, an extraction process of full-extraction and full-reverse extraction is not performed, and after removal of relevant impurities only by extraction, the nickel ions are directly precipitated as nickel hydroxide. Compared with the full-extraction and full-reverse extraction technology, said process is simple, reduces the material consumption and energy consumption, reduces 18.72% of sodium hydroxide, 44.70% of sulphuric acid and 79.12% of hydrochloric acid, and reduces the overall production cost by 15% on average. |