Scrap lithium battery precious metal recycling equipment
The working principle of lithium battery positive and negative film processing equipment: the structure of lithium battery positive and negative processing equipment and the material characteristics of its constituent materials copper and carbon powder, the use of hammer vibration crushing, vibrating screening and air flow sorting combined process to negative composition materials of waste lithium batteries Carry out separation and recovery.
Lithium battery is mainly composed of outer shell, positive, negative, electrolyte and diaphragm. + is made by coating lithium cobalt oxide powder on both sides of the aluminum foil current collector through PVDF which plays a role of bonding;-structure is similar to +, and is made of carbon powder. It is formed on both sides of the copper foil current collector. Lithium-ion batteries have significant advantages such as high voltage, large specific capacity, long life and no memory effect. Since their commercialization, they have quickly occupied the power source market for portable electronic and electrical equipment, and their output has increased year by year. The service life is about 2 years. If the discarded lithium battery is improperly handled, the lithium hexafluorophosphate, carbonate organics and heavy metals such as cobalt and copper will inevitably pose a potential pollution threat to the environment. On the other hand, cobalt, lithium, copper and plastics in waste lithium batteries are precious resources and have high recycling value. Therefore, scientific and effective treatment of waste lithium batteries not only has significant environmental benefits, but also has good economic benefits.
At present, research on the recycling of waste lithium batteries is mainly focused on the recovery of valuable precious metals cobalt and lithium, and there are few reports on the separation and recovery of materials. In order to alleviate the increasingly serious resource shortage and environmental pollution caused by the rapid economic development, it has become a global consensus to realize full-component recycling of waste materials.
Features of two-piece lithium battery processing equipment:
1. The combined process of hammer crushing, vibrating screening and airflow sorting can realize the resource utilization of metal copper and carbon powder in waste lithium battery materials;
2. The material is crushed by hammer vibration, which can effectively realize the mutual peeling between the carbon powder and the copper foil, and then the copper foil and the carbon powder can be initially separated by vibrating the sieve based on the difference in size and shape between the particles;
3. For crushed particles with a particle size of 0.125~0.250 mm and a low copper grade, airflow sorting can be used to achieve effective separation between copper and carbon powder. When the airflow velocity is 1.00 m/s, a good recovery effect can be achieved. ;
4. This equipment is mainly used by lithium-ion battery manufacturers to separate aluminum and copper from the positive and negative materials in the scrapped positive and negative films for recycling purposes. The complete set of equipment operates under negative pressure, no dust leakage, and the separation efficiency can reach more than 90%.
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