Flexible air flow powder removal method for waste ternary lithium batteries

Abstract

The invention relates to the technical field of material recovery of waste ternary lithium batteries, and provides a flexible air flow powder removal method for waste ternary lithium batteries. The method mainly includes the steps of putting the waste ternary lithium batteries into a battery shredder to be primarily shredded, collecting dust from volatile gas, conveying the shredded batteries intoa winnowing vibrator for primary powder separating and diaphragm winnowing, transferring winnowed diaphragms to a diaphragm bin, making screened-out powder enter a material powder bin, making screened-out crushed materials be subjected to magnetic separation and then enter a secondary crusher for fine crushing, finally making the materials enter an air flow powder remover for flexible powder removal treatment, separating out copper aluminum foil from secondarily crushed powder, and then conveying the secondary powder to the material powder bin. By means of the flexible air flow powder removalmethod, tertiary crushing and grinding do not need to be conducted on battery pole pieces, the problem that powder is carried when the battery pole pieces are rolled is avoided, the air flow powder removal speed can be flexibly adjusted, and the battery powder removal efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of material recycling of waste ternary lithium batteries, and more specifically, relates to a flexible airflow depowdering method for waste ternary lithium batteries. Background technique [0002] According to statistics, as early as 2000, the global output of lithium-ion batteries had exceeded 580 million, and by 2010 it had reached 3 billion. By 2016, the output of lithium batteries produced in my country alone had reached 7.842 billion. It is estimated that by 2020, there will be a large number of scrap lithium-ion batteries worldwide, and the total number will reach 25 billion, with a weight of up to 500,000 tons. These waste lithium-ion batteries contain a large amount of heavy metal components, including lithium, nickel, cobalt, manganese and other elements. If they are not recycled well, they will cause large-scale pollution. Therefore, the recycling of waste lithium-ion batteries is particularly im...

AI Technical Summary

Problems solved by technology

These include high energy consumption, expensive chemicals, low recovery rate of valuable metals, consumption of a large amount of acid and alkali, high volume of waste liquid, large environmental load, and high treatment costs.

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