Method for recycling waste lithium cobalt oxide lithium ion battery

Abstract

The invention relates to a method for recycling waste lithium cobalt oxide lithium ion battery. The method is characterized in that valuable components in the waste lithium ion battery are completely recycled by integrating the processes of crushing by a punch press, magnetic separation, eddy current selection, anaerobic atmospheric roasting, temperature-variable filtering and the like, and products with the relatively high additional values, such as elemental crude cobalt, lithium carbonate, graphite, copper, aluminum, iron, and plastics are obtained. Manners of crushing by a punch press, magnetic separation, eddy current selection and the like are adopted for performing material separation, so that the original physical properties of materials are kept. Meanwhile, positive powder and negative powder of an electrode material are cooperatively treated, the negative graphite material is effectively utilized, the in-situ preparation of a resource can be realized, and the waste lithium ion battery can be relatively completely recycled. The anaerobic atmospheric roasting is adopted, so that the reaction condition is relatively loose, the loss of a graphite material is reduced, the cost is saved, the technological flow is simplified, and the industrial application practice can be facilitated.

Description

technical field [0001] The invention relates to resource recovery of valuable components of waste lithium ion batteries, in particular to an effective and environmentally friendly recovery method for lithium cobalt oxide batteries, and belongs to the field of electronic waste treatment and resource utilization in the field of environmental protection. Background technique [0002] In 2011, the global shipment of lithium-ion batteries was about 4.298 billion, and the market size reached 92.4 billion yuan, an increase of 24.16% compared with 2010. It is estimated that from 2012 to 2020, portable lithium-ion batteries and power lithium-ion batteries will continue to grow at a compound growth rate of 7.58% and 26.84%, respectively. In 2020, the global lithium-ion battery market will reach 386.6 billion yuan. According to statistics, the service life of lithium batteries is generally about 3 years, and the cycle cycle is about 500 times. Due to repeated charging and discharging, ...

AI Technical Summary

Problems solved by technology

[0007] The current resource recycling process of lithium-ion batteries is mainly a hydrometallurgical process combined with acid leaching and solvent extraction. In the process of processing lithium cobalt oxide battery electrode materials, cobalt leaching and chemical advanced treatment are required, resulting in a large amount of high The high concentration of chemical acid-base waste liquid will cause secondary pollution, and the commercial extraction agent will increase the treatment cost

And concentrate on the extraction of valuable metals cobalt and lithium in positive electrode materials, ignoring the recycling of other resources

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