Method of recovering valuable resources from lithium ion secondary batteries

摘要

PROBLEM TO BE SOLVED: To provide means for recovering valuable materials such as cobalt, nickel and copper with low impurity quality and high recovery rate. A heat treatment step of heat-treating a lithium ion secondary battery, a crushing step of crushing the heat-treated product obtained in the heat treatment step, and a crushed product obtained in the crushing step are made to be 1.2 to 2.4 mm. The first-stage classification step of classifying at the classification point of, and the second-stage classification of classifying the intermediate product and the fine-grained product obtained on the narrow side in the first classification step at a classification point of 0.3 mm or less And a dry magnetic separation step in which the intermediate product obtained on the rough side in the second classification step is subjected to dry magnetic separation, and the obtained magnetic substance is again subjected to dry magnetic separation at least once. A method of recovering valuable materials from a lithium ion secondary battery. [Selection diagram] Fig. 1