With the rapid development of the electric vehicle market, the production and demand of lithium batteries are increasing. However, the problem of recycling and processing of used lithium batteries has become increasingly prominent. In order to achieve efficient recycling and reuse of used lithium batteries, a gravity sorting system for broken lithium battery materials came into being. This system mainly sorts materials based on different densities and particle sizes. The used battery recycling equipment separates valuable metal elements to provide guarantee for the recycling of lithium batteries.
1. Crushing process
Waste lithium batteries are first crushed into small particles. The purpose of this step is to fully crush the battery casing, electrode materials, separators and other parts for subsequent sorting. During the crushing process, attention needs to be paid to controlling the crushing particle size. Too large a particle size will affect the sorting effect, and too small a particle size will increase the difficulty of sorting.
2. Gravity sorting process
The crushed materials enter the gravity sorting system and are separated according to density and particle size through different sorting equipment, such as air flow sorting, gravity sorting, screening treatment, etc. In this process, materials of different densities such as electrode materials, copper foil, and aluminum foil are separated. Gravity sorting is a very important part of the processing of lithium battery crushed materials, and its effect directly affects the subsequent extraction and recovery rate of metal elements.
3. Magnetic sorting process
After gravity sorting, some ferrous materials and magnetic materials need to be further separated by magnetic sorting equipment. Magnetic separation mainly uses magnetism to adsorb iron and magnetic substances in materials to the magnetic separator, and then separates them from non-magnetic substances through flushing and blowing. This process can effectively remove iron and magnetic impurities from the material and improve the purity of subsequent metal extraction.
4. Post-processing process
After gravity sorting, magnetic sorting and chemical sorting, the obtained metal elements also need to be post-processed, such as washing, drying, smelting, etc. The purpose of the post-processing process is to further remove impurities and improve metal purity to meet recycling requirements. At the same time, the quality of metal elements also needs to be tested and controlled during post-processing to ensure that they meet relevant standards and market demands.
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