Wet sorting process for waste lithium battery and application thereof

A wet sorting process for a waste lithium battery, comprising the following steps of:

• (1) carrying out wet ball milling on a sorting material of the waste lithium battery to obtain a ball-milled product;
• (2) screening the ball-milled product to obtain a coarse-grained screened material, a medium-grained screened material and a fine-grained screened material;
• wherein, in step (2), the coarse-grained screened material is returned to step (1) for ball milling;
• (3) carrying out wet ball milling, screening, magnetic separation and table concentration on the medium-grained screened material to obtain copper, aluminum and a steel shell;
• wherein, in step (3), a size of a sieve hole of the screening is 0.15 mm, and a screened product with a size smaller than 0.15 mm is fed into step (4) for flotation;
• and
• (4) carrying out flotation, magnetic separation and table concentration on the fine-grained screened material to obtain cathode material powder, graphite, copper and aluminum;
• wherein, in step (2), the coarse-grained screened material has a particle size of greater than 2 mm to 4 mm, the medium-grained screened material has a particle size of 0.15 mm to 2 mm, and the fine-grained screened material has a particle size of less than 0.15 mm.