Waste lithium battery recycling process
Release Time：2022-10-25 Source：Battery Recycling Machine Share：
The recycling of used lithium batteries is mainly done by crushing and sorting through used lithium battery recycling equipment, and the main purpose is to recover the rare materials on top of used lithium batteries.
Used lithium battery is mainly composed of battery shell, positive, negative, lithium battery electrolyte and diaphragm. Positive level is based on the bonding effect of PVDF lithium cobaltate powder sizing on both sides of the aluminum platinum liquid collection; negative level structure is similar to the positive level, composed of carbon powder bonded to both sides of the copper foil liquid collection. At the present stage, the key to resource recycling of used lithium batteries is to concentrate on the recovery of precious metals cobalt and lithium in the positive. The copper foil (up to 35%) in the negative of used lithium battery is a key raw material for universal application, and the carbon powder adhered to it can be used as plastic, vulcanized rubber and other additives. Therefore, the negative composition of waste lithium battery raw materials to carry out a reasonable separation out, for the degree to complete the regeneration of waste lithium battery resources, lifting its relative environmental hazards have a role in promoting. Waste lithium battery processing equipment can get those metal materials and materials after sorting treatment? How to carry out crushing and sorting?
The waste lithium battery is sent by the conveyor into the first-class twin-shaft shredder to carry out tearing, tearing the material according to the conveyor into the second-class multi-blade shredder to carry out secondary crushing, secondary crushing of the material into the conveyor through the sorting equipment, the material can be sorted out of iron. The sorted material is sent to the airflow sorter for copper and aluminum material sorting by the negative pressure wind conveyor.
The diaphragm paper is extracted from the positive and negative pieces through the air separator, and the sorted positive and negative pieces are fed into the three-stage crusher to carry out the crushing process, and the materials are crushed to 20 mesh or less. The crushed material is fed into the cyclone dust collector by the negative pressure system to carry out soot filtration.
According to the 2 cyclone sorting, the chemical substances with different relative densities are carried out in the hierarchy, and then the positive battery positive materials and copper, aluminum, nickel and other raw materials are obtained, while all the ultra-fine dust is brought to the bag filter by the negative pressure system for collection. And the waste gas obtained from the consideration will be sent again by the negative pressure system to the exhaust gas treatment machinery and equipment to carry out air filtration, and then carry out high discharge after reaching environmental protection standards.
The waste lithium battery recycling equipment crushes and separates the aluminum and platinum, copper and cobalt powder and graphite powder in the positive and negative pieces of waste lithium batteries to achieve the purpose of recycling. All production lines operate under negative pressure, no dust pollution in the production process, the working environment is cleaner and more environmentally friendly, no waste water discharge. The use of waste lithium battery recycling equipment not only has obvious ecological benefits in the recycling of waste lithium batteries, but also has excellent economic benefits.
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