Proposed are a method and a system for separating a cathode material of a waste lithium secondary battery using an oxidation reaction of an anode material and a reduction reaction of the cathode material. When lithium is heated to a level where lithium can undergo an explosive reaction using the low-temperature pyrolysis system, the binder, the electrolyte, and the separator contained in the waste lithium secondary battery are gasified into syngas by the explosive reaction of lithium and the resulting syngas is removed. The reduction reaction of the cathode material and the oxidation reaction of the anode material are promoted by the continuous explosive reaction of lithium and the stirring action of the spiral. As a result, the black powder and the current collector mixture are extracted. Therefore, it is possible to improve the recovery rate of valuable metals to more than 97%, thereby improving recycling efficiency.

Embodiments of the present invention relate to a system for processing battery waste. The system comprises a decomposing device for mechanically decomposing the battery waste to a, in particular strip-shaped or flake-shaped, lightweight portion and a heavyweight portion. The decomposing device comprises an outlet for commonly discharging the lightweight portion and the heavyweight portion. The system further comprises a separating unit for separating the lightweight portion from the heavyweight portion, wherein the separating unit is coupled with the decomposing device for receiving the lightweight portion and the heavyweight portion. The system further comprises a fiber compactor unit, wherein the fiber compactor unit is coupled with the separating unit for receiving the lightweight portion. The fiber compactor unit is configured for compacting the lightweight portion under a separation of a further active material.

Disclosed are a wet sorting process for a waste lithium battery and application thereof, which belong to the field of battery material recycling. The wet sorting process includes the following steps of: carrying out wet ball milling on a sorting material of a waste lithium battery to obtain a ball-milled product screening the ball-milled product to obtain a coarse-grained screened material, a medium-grained screened material and a fine-grained screened material, 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 and carrying out flotation, magnetic separation and table concentration on the fine-grained screened material to obtain cathode material powder, graphite, copper and aluminum.

Disclosed are a wet sorting process for a waste lithium battery and application thereof, which belong to the field of battery material recycling. The wet sorting process includes the following steps of carrying out wet ball milling on a sorting material of a waste lithium battery to obtain a ball-milled product, screening the ball-milled product to obtain a coarse-grained screened material, a medium-grained screened material and a fine-grained screened material, 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, and carrying out flotation, magnetic separation and table concentration on the fine-grained screened material to obtain cathode material powder, graphite, copper and aluminum.