PROCESSING METHOD OF USED LITHIUM ION BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a processing method for recovering fluorine contained in a used lithium ion battery efficiently.SOLUTION: A processing method of a used lithium ion battery has a thermal decomposition step for thermally decomposing the organic components and the fluorine compound of the battery by heating a used lithium ion battery, a crushing screening step for crushing the heated battery and screening into fine particles and coarse particles, a cleaning elution step for cleaning the fine particles and eluting the fluorine compound contained in the fine particles, a fluorine immobilization step for forming a fluorine-containing precipitation by adding a precipitation agent to the liquid after cleaning containing the eluted fluorine compound, and a separation recovery step for recovering the fluorine-containing precipitation while separating solid and liquid.SELECTED DRAWING: Figure 1