A kind of treatment method of recycling waste lithium cobaltate lithium ion battery
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A lithium-ion battery and treatment method technology, applied in the field of electronic waste treatment, can solve the problems of increased treatment costs, neglect of other resource recycling, secondary pollution, etc., achieve complete resource utilization, reduce graphite material loss, and save costs Effect
Active Publication Date: 2017-01-11
SHANGHAI JIAO TONG UNIV
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[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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[0029] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0030] Such as figure 1As shown, the recycling method of waste lithium cobaltate lithium-ion battery, this method will use punch crushing, vibration screening, magnetic separation, air selection, anaerobic atmospheric pressure roasting and other processes to realize the valuable components in waste lithium-ion batteries Complete resource utilization, and obtain high value-added elemental cobalt and lithium carbonate products. Including discharge + punch crushing, vibrating screening + magnetic se...
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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, ...
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