METHOD FOR RECOVERING VALUABLE MATERIALS FROM LITHIUM ION SECONDARY BATTERIES

A method for recovering valuable materials from lithium ion secondary batteries includes: a step of performing a heat treatment on a lithium ion secondary battery to obtain a heat-treated product; a first classification step of classifying a crushed product is obtained by crushing the heat-treated product to obtain a coarse-particle product and a small-particle product; a step of classifying a ground product obtained by grinding the small-particle product at a classification point smaller than a classification point of the first classification step to obtain a coarse-particle product and a fine-particle product; a step of subjecting the fine-particle product to magnetic separation to obtain a magnetic component and a non-magnetic component ; a step of subjecting the non-magnetic component to magnetic separation to obtain a magnetic component and a non-magnetic component ; and a step of recovering valuable materials from the magnetic components and