Method for green and efficient recycling of nickel, cobalt and manganese in waste lithium batteries

Abstract

The invention discloses a method for green and efficient recycling of nickel, cobalt and manganese in waste lithium batteries, and aims at solving the problems of environmental pollution and low recycling rate of nickel, cobalt and manganese during the recycling of the waste lithium batteries. The method comprises the following steps: performing single-stage crushing and single-stage grinding, sothat the processing capacity is greatly increased and the unit energy consumption is reduced; performing pre-discharging, pre-treatment, milling and sieving to physically separate a positive electrodematerial from other materials; and performing combined magnetic separation on the positive electrode material powder by a three-stage high intensity magnetic separator to recycle nickel, cobalt, manganese and other valuable metal element materials, so that the comprehensive recycling rate of nickel, cobalt, manganese magnetic materials is greatly improved. The method has simple process, large production scale, low power consumption, and high purification efficiency. The produced nickel-cobalt-manganese-containing valuable metal element materials have stable performance and a good beneficiation environment, the entire production process belongs to physical beneficiation and does not cause the environment pollution, and at the same time, the method can also be used for large-scale production of positive electrode raw materials for lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of comprehensive recovery of waste lithium batteries, in particular to a beneficiation method for recovering nickel, cobalt and manganese valuable metals from waste lithium batteries. Background technique [0002] In recent years, driven by the energy and environmental crisis, along with the rapid development and promotion of new energy vehicles, there has been a huge demand for lithium batteries. Due to the limited service life of lithium batteries, it means that the number of waste lithium batteries is also increasing year by year. The impact of waste lithium batteries on the environment and the waste of resources are also becoming more and more serious. According to reliable data analysis, an ordinary lithium battery can pollute 1m 3 Water or waste 1m 2 Soil, it is conceivable that waste lithium batteries have a significant impact on the environment; and waste lithium battery cathode materials contain ...

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Problems solved by technology

Chemical treatment process will bring secondary pollution problems

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