| 초록 |
Recycling of the spent lithium-ion batteries (LIB), consisting of Li, Co, Mn, Ni metals, is essential due to its limited resources and environmental impacts. In the conventional hydrometallurgy process, an excessive amount of chemicals are required in the leaching and metal extraction process, and it leads to an increase in operating cost for chemical consumption and further purification. Herein, we proposed and simulated a short path system for high recovery of Li and other metals as following four-unit operation: thermal decomposition of battery material, selective water leaching of lithium, acid leaching, and precipitation for remaining metals. Thermal decomposition is firstly conducted to produce the metal oxide, and water leaching is conducted to selectively form the LiOH slurry. The remained metal oxides are filtered and leached in the sulfuric acid. The cobalt is firstly precipitated using oxalic acid, and the remaining metals are selectively precipitated using Na2CO3 by adjusting the pH value. Compared with the conventional process, we expected that the proposed system could reduce the operating cost for metal extraction |
