| abstract |
The present invention relates to pyrometallurgical and water smelting for recovering and recycling (recycling) lithium and vanadium compounds from materials including used lithium secondary batteries, especially lithium metal gel and solid polymer electrolyte secondary batteries. hydrometallurgical) process. The method comprises the steps of preparing the material, curing by cooling at a temperature below room temperature, grinding the cooled and cured material, and the ash obtained by incineration or the solidified salt obtained by molten acidification, resulting in the mother liquor. Or dissolving the milled material itself with acid, extracting the vanadium compound from the mother liquor, separating heavy metals and aluminum therefrom, and precipitating lithium carbonate from the remaining solution. [Selection diagram] FIG. 1A |