| 英文摘要 |
Lithium batteries contain many valuable resources, including cobalt, nickel, manganese, copper, and even carbon powder, which can be regenerated and reused. According to last year's lithium battery recycling methods, they are all exported overseas, and the output type is mainly 3C batteries. Therefore, valuable metals in domestic waste battery resources are basically lost overseas, and valuable metals such as cobalt and nickel in waste batteries have not entered the local industrial chain. Therefore, this project is aimed at the development and verification of the technology for the extraction of high-purity cathode precursor raw materials from waste lithium secondary batteries. The cobalt content of the recycled materials can be greater than 71.06wt%, and the overall impurities are less than 1500ppm, and meet the industrial raw material specifications. Finally, the trial production and verification of the recycled material products can be carried out, and the high value-added cobalt tetroxide can be obtained. Introducing recycled materials into the existing lithium battery supply chain. In addition to cobalt, other metals can also be extracted and reused through the process, which is more in line with the overall economic efficiency and the concept of full recycling.
In this study, the cost of building the plant is estimated based on the scale of the annual processing capacity of 1,000 tons of waste secondary lithium batteries. The fixed cost of the construction is 122.5 million yuan (the equipment amortized for the first five years is 24.5 million yuan/year) , The current expenditure was 54.325 million yuan, the ROI was -5.3% in the first 5 years, and the negative value was changed to positive 10.9% in the sixth year. Therefore, in order to speed up the recovery of construction costs, it is necessary to increase the value of recycled materials. Increase the added value of products, improve the existing processing process, and expand the way to go.
In addition to visiting lithium battery recycling and processing companies, we are also actively visiting chemical and electric motor vehicle manufacturers, including CoreMax CO., LTD., Mechema CO., LTD., Kwang Ze Technology CO., LTD., and Onyx Ta-Ho CO., LTD. to discuss the use of battery renewable materials, acceptable specifications, and ways to dissipate them. And the possibility of connecting with upstream and downstream, and expecting emerging processing companies to join, drive and upgrade the current processing situation, develop high-value products, and keep valuable metal resources in the country for recycling.
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