| abstract |
A method of treating a lithium ion battery scrap of the present invention comprises a leaching step of leaching a lithium ion battery scrap and performing solid-liquid separation on the leached solution obtained thereby to obtain a liquid after the first separation, A de-ironing step of adding an oxidizing agent to adjust the pH of the solution after the first separation to within the range of 3.0 to 4.0, followed by performing solid-liquid separation to remove iron in the solution after the first separation to obtain a solution after the second separation, 2 neutralization to a pH within the range of 4.0 to 6.0, followed by solid-liquid separation, to remove aluminum in the liquid after the second separation and to obtain a liquid after the third separation. |