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Author ：Iflowpower – Portable Power Station Supplier
At present, the resource recovery process of universal waste power batteries includes two stages of pretreatment and subsequent processing. The pretreatment process first needs to be completely discharged, then disassemble the battery to separate each component of the positive electrode, negative electrode, electrolyte, and diaphragm. In the subsequent processing link, the main goal is to recover the high-value components in various types of waste after dismantling, and further carry out battery material reconstruction or repair; the technical methods employed can be divided into three categories: dry recycling Technology, wet recovery technology and biological recovery technology.
Dry recycling technology refers to a medium-oriented recovery technique of various types of batteries or viable metals directly, mainly including mechanical separation and high-score. Dry recycling does not pass through other chemical reactions, the process is short, the recovery is not strong, usually used in the preliminary stage of the separation and recovery of metals in the lithium battery. Some enterprises have initially developed dry thermal repair technology, which can be high-temperature thermal repairs to the crude product obtained by the dry recovery; however, the positive and negative materials produced by this method contain certain impurities, and their performance cannot meet the power of new energy vehicles.
Battery requirements, mostly used in energy storage or small power batteries, etc. Wet recovery techniques are metastasis, and transfer metal ions from electrode materials to the leaching medium, and then by ion exchange, precipitation, adsorption, etc. Extraction in solution.
Wet technical route mainly includes three methods such as wet metallurgy, chemical extraction and ion exchange. Wet recovery techniques are relatively complicated, but the technique has a high recovery of lithium, cobalt, and nickel, and the high purity can be obtained by metal salts, oxides, etc. obtained by wet recovery techniques.
Decreasing the quality requirements for the production of power battery materials; thus wet recovery technology is also the main recovery method used by leading recycling companies at home and abroad. Biological recovery techniques mainly use microbial leaching, convert the useful components of the system into a soluble compound and selectively dissolve, and achieve the separation of the target component and the impurity component, and finally recover lithium, cobalt, nickel. At present, the biological recovery technology is not yet mature, such as the cultivation of high-efficiency strains, the cultural cycle is too long, and the key issues such as leaching conditions remain to be resolved.
As mentioned above, the current recovery efficiency is also relatively mature wet recovery process is increasingly become the mainstream technology route of the specialization stage; Greenmeal, Bangu Group and other international leaders, most of the international leading enterprises, most The wet technical route is used as the main technique of viable metal resources such as lithium, cobalt, nickel; some enterprises also support various recycling technologies such as dry law to improve integrated recovery efficiency. From another side, whether it is lithium iron phosphate or NCA ternary material, wet technique for re-created positive material after price-priced metal recovery, is better than that of the capacity of this key performance indicator is better than the dry technical repair. Positive material.
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