Ultrasonic-microwave assisted lithium ion battery recovery method

Abstract

The invention discloses an ultrasonic-microwave assisted lithium ion battery recovery method, and belongs to the technical field of waste lithium ion battery recovery. Microwave heating, ultrasonic heating and a rotary furnace body are combined, the pretreatment time of materials is shortened by utilizing the excellent wave absorbing performance of the materials, meanwhile, micro-gas nuclear cavitation bubbles in the acid leaching and extraction processes vibrate and burst instantly by utilizing the mechanical effect and cavitation effect of ultrasonic waves, so that the reaction process is accelerated. On one hand, waste heat generated in the microwave pretreatment process can provide reaction conditions for the subsequent acid leaching and extraction process, the production cost is saved, on the other hand, a rotary furnace body matches with a spiral stirrer inside a furnace chamber to enable a solution to move in the longitudinal direction and the transverse direction, liquid dropsin a container are cut, the effective contact area of a water phase and an organic phase is increased, and the extraction efficiency is greatly improved.

Description

technical field [0001] The invention relates to an ultrasonic-microwave assisted recovery method for lithium-ion batteries, which belongs to the technical field of recovery of waste lithium-ion batteries. Background technique [0002] As a new energy star in the 21st century, lithium-ion batteries have been sought after by countless people. The materials that make up their electrodes contain a lot of toxic electrolytes and heavy metals such as nickel, cobalt, and manganese. In the past few decades, we have witnessed countless tragic cases caused by the arbitrary burial of lithium-ion batteries to the ecological environment. Wherever lithium-ion batteries reach, "life is overwhelmed with charcoal", and harmful substances enter the water cycle to bring endless harm to our children and grandchildren. However, this solid waste resource has high potential value (such as ordinary lithium-ion batteries contain 20% cobalt, 10% copper, 4.7% aluminum, 2.5% iron and 0.1% lithium, etc.),...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems of long cycle, complex process and various equipment in the wet process, this process proposes a method and equipment integrating roasting-acid leaching-extraction

In addition, this process considers the problem that the extractant cannot be recovered after being used for many times, and the cobalt and manganese in the organic phase are separated by a combination of wet method and fire method

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