Method for recovering valuable material from lithium-ion secondary battery, and recovered material containing valuable material

1. A method for recovering a valuable material from a lithium-ion secondary battery, the method comprising:

roasting a lithium-ion secondary battery containing a valuable material in a metal battery case thereof to obtain a roasted material;

stirring the roasted material with liquid to separate contents containing the valuable material from the inside of the metal battery case, wherein the stirring is performed so as not to break or crush the metal battery case; and

sorting the contents separated by the separation and the metal battery case to obtain a recovered material containing the valuable material.

2. The method for recovering a valuable material from a lithium-ion secondary battery according to claim 1 , wherein the valuable material is cobalt.

3. The method for recovering a valuable material from a lithium-ion secondary battery according to claim 1 , wherein the separation is performed by a ball mill, a rod mill, a mill using no solid media, and a rotary washing machine.

4. The method for recovering a valuable material from a lithium-ion secondary battery according to claim 1 , wherein an amount of the liquid for use in the separation is 0.5 kg to 100 kg relative to 1 kg of the roasted material.

5. The method for recovering a valuable material from a lithium-ion secondary battery according to claim 1 , wherein the sorting is performed by sieving.

6. The method for recovering a valuable material from a lithium-ion secondary battery according to claim 5 , wherein a particle size of undersize recovered material obtained by the sieving is 1 mm or smaller.