Sustainable Mining and Metallurgy

The spent ternary lithium batteries are recovered by pretreatment and hydrometallurgy process. The iron impurity content in the regenerated electrode material generally accounts for more than 2% , which will affect the physical and electrochemical characteristics of the regenerative material. This paper reviewed the research status of iron removal process in the recycling pretreatment and wet leaching stage of spent ternary lithium batteries, mainly including magnetic separation method in the pretreatment stage, precipitation method, solvent extraction method and ion exchange method in the leaching stage. At the same time, the research on iron removal process in the recycling process of spent ternary lithium batteries was prospected. The development direction of green environmental protection aims to provide some new ideas for lithium battery recycling and impurity removal technology.