Lithium battery recycling and reuse

Release time:

2021-11-30 09:37

Lithium battery recycling starts from the treatment of lithium battery monopole, expanding the scale of lithium battery treatment and adjusting the process. Developed a reasonable set of automatic mechanical separation process equipment for lithium battery recovery-lithium battery crushing and sorting treatment equipment, found out the necessary conditions for each step in the recovery process, and separated and recovered the metal substances in the lithium battery.

The remaining power in the spent lithium-ion battery is discharged, and then the battery is torn, broken and crushed, separating the separator, the casing and the positive and negative fragments. The positive and negative plates are crushed, and the air-separated copper-aluminum mixed metal particles are selected to realize the recovery of lithium batteries.

In fact, lithium batteries contain a large amount of metal copper and lithium powder, which are expensive resources. Tens of millions of tons of waste lithium batteries are produced on the market every year. If these lithium batteries are recycled, they will have a high commercial value.

Waste lithium batteries contain metal elements such as cobalt, lithium, nickel, copper, aluminum and iron. The mass fraction of cobalt ions is as high as about 15%, which is 850 times that of associated cobalt ores, far exceeding the output of cobalt mines in China. At the same time, in the structure of lithium batteries, aluminum foil as the positive collector and copper foil as the negative collector also have a high recycling value.

The whole set of waste lithium battery crusher has great social and economic significance for the recovery of valuable metals in lithium ion batteries, reducing environmental pollution and alleviating resource shortage.

In the long run, improper handling or arbitrary disposal of waste lithium batteries will cause harm to the ecological environment. For example, heavy metal elements in cathode materials, such as cobalt and nickel, organic matter in the electrolyte, and carbon materials in the cathode, can pollute water and soil, which may be difficult to recover within decades. Relevant departments are stepping up efforts to formulate management, technology and evaluation standards for lithium battery recycling, such as battery margin testing standards; speed up the research on incentive policies such as fiscal and tax incentives, industrial funds, and points management, and explore market-oriented models such as residual value trading of power lithium batteries. Promote various preferential policies and measures such as the recycling of power lithium batteries.

At present, the direction of lithium battery recycling mainly includes recycling and recycling after echelon use. In these processes, the key technical weakness is that the regeneration technology is not mature, the disassembly is mainly done by manual, and the cost remains high. Therefore, in view of the weak links of recycling, we should organize industry-university-research joint research, break through key common technologies, and effectively reduce production costs; encourage lithium battery manufacturers with production capacity and technical advantages to build recycling projects, and promote them step by step in a planned way according to market demand, so as to complete the virtuous circle development of the whole industry.

Lithium battery recycling process mainly includes pretreatment, secondary treatment and advanced treatment. Since there is still residual power in the waste battery, the pretreatment process includes deep discharge, crushing and physical separation; the purpose of the secondary treatment is to completely separate the positive and negative active materials from the substrate. Commonly used heat treatment, organic solvent dissolution, alkali solution dissolution, electrolysis and other methods to completely separate it; advanced treatment mainly includes two processes: leaching and separation and purification to extract valuable metal materials. According to the classification of extraction processes, lithium battery recovery methods can be divided into three main categories: dry recovery, wet recovery and biological recovery.

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