Introduction

For the recycling of lithium battery cathode sheets (including rolls and trim scraps), we offer an integrated automated resource recovery solution that combines crushing, screening, grinding, separation, and dust removal. This system employs innovative multi-stage crushing and precision separation processes to effectively address the challenges of winding, clumping, and entrainment during the liberation of cathode material powder. The result is the highly efficient separation and recovery of high-purity aluminum particles and high-value black mass , achieving a black mass recovery rate of over 99%. This empowers our clients to transform waste resources into tangible economic benefits.

Recycling process

Crushing and peeling: The positive electrode of the battery to be processed first enters the crushing system through a conveyor belt for preliminary crushing treatment. The crushing disk inside the equipment drives the hammer head to cooperate with the lining plate to form various comprehensive forces such as collision, friction, and shear, causing the pole piece to be subjected to mechanical force, thereby peeling off the active substance from the aluminum foil current collector.

Graded separation: The stripped material is transported to the grading area using airflow, and centrifugal and shear forces are generated by the high-speed rotation of the grading wheel. The qualified active substance powder (black powder) enters the next process through the grading wheel, while the failed material remains in the chamber for secondary stripping.

Screening and sorting: The crushed material is subjected to vibration screening and separated based on the size and shape differences between particles. Research has shown that after crushing and screening, the grade of aluminum in the crushed material with a particle size greater than 0.250mm is 92.4%, while the grade of positive electrode material in the crushed material with a particle size less than 0.125mm is 96.6%, both of which can be directly recovered.

Airflow sorting: For materials with intermediate particle sizes (0.125-0.250mm), airflow sorting is used to achieve effective separation of aluminum and positive electrode materials. When the airflow velocity is 1.00m/s, the aluminum recovery rate reaches 92.3% and the grade reaches 84.4%.

Collection and dust removal: Black powder is collected through cyclone collectors and dust removal systems, and the material is separated from air to ensure a clean and safe production environment.

Black powder                                                                                                                          Aluminum powder

Recycling advantages

High separation efficiency: Through the combination of hammer vibration crushing, vibration screening, and airflow sorting processes, the mutual peeling of aluminum foil and positive electrode material can be effectively achieved, with a separation efficiency of over 98%.
High purity recycling: The equipment can achieve high-purity recycling of black powder, with aluminum content controlled between 100-500PPM, and a black powder recovery rate of over 97%, even 98%.
Environmental protection and energy conservation: The complete set of equipment operates under negative pressure without dust discharge. By collecting black powder mixed in the exhaust gas, it not only reduces the pollution of black powder to the environment, but also realizes the reuse of black powder.
High degree of automation: The equipment adopts PLC control to adjust and detect the entire process, which can achieve automated operation, accurately control the operating parameters of the equipment, and ensure the stability of peeling effect and product quality.
Large processing capacity: The equipment processing capacity can reach 1000-3000kg/h according to the model configuration, suitable for the needs of large-scale recycling and processing of waste lithium batteries.

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