Waste lithium batteries are mainly composed of casing, positive electrode, negative electrode, electrolyte and separator. The positive electrode is composed of lithium cobaltate powder coated on both sides of the aluminum foil current collector through PVDF that acts as a bond; the negative electrode structure is similar to that of the positive electrode, consisting of carbon powder bonded to both sides of the copper foil current collector. For the recycling of waste lithium batteries, the commonly used waste lithium battery recycling methods include hydrometallurgy, pyrometallurgy and mechanical physical methods. Compared with the wet method and the fire method, the mechanical physical method of the lithium battery pulverizer does not require the use of chemical reagents, and has lower energy consumption, which is an environmentally friendly method. The physical separation method is a separation method based on the difference in material properties such as particle size, density, and magnetic properties of the material. It mainly includes screening, gravity separation, flotation, and magnetic separation. Firstly, vertical shredders, wind shakers and vibrating screens are used to classify waste lithium-ion batteries. After crushing and sorting, positive electrode materials, negative electrode materials, separators, current collectors, etc. are obtained.
Lithium battery recycling equipment separates and regenerates waste lithium batteries, and separates waste lithium batteries into the raw materials we need. Separation facilities are used for separation treatment, and there are pulse dust removal facilities to collect dust generated during the separation process and subsequent processes. Form a green and high-quality closed-circuit circulation system throughout the battery life cycle. Lithium battery crushing and recycling equipment mainly uses aluminum foil, copper foil and positive and negative electrode materials in the positive and negative plates of scrap lithium batteries to separate them for recycling. The development environment of the industry is optimized, and the development prospect of lithium battery resource utilization is promising.
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