Abstract:The method of carbon reduction roasting - water leaching was used for selective extraction of Li from waste ternary Li-ion cathode materials. Through thermodynamic analysis, combined with XRD, ICP and other detection means, the effects of roasting temperature, roasting time and carbon content on Li leaching rate were studied. The results show that Li in ternary Li-ion anode material could be preferentially extracted by carbon reduction roasting - water leaching method. Li in calcine exists as Li2CO3. The leaching rate of Li is 97.85% under the conditions including roasting temperature of 750 ℃, roasting time of 1 h, and carbon dosage of 20%, and the preferential selective extraction of Li is achieved.