Process for recycling spent lithium-ion batteries to manufacture ternary precursor

Abstract

The invention provides a process for recycling spent lithium-ion batteries to manufacture a ternary precursor. The process mainly comprises the steps of crushing, pyrolyzing, sorting, leaching, purifying, dosing, crystalizing and precursor synthesizing. The method provided by the invention has the beneficial effects that (1) no soluble alkali metal ions (such as potassium and sodium) is carried inthe whole sulfate production process, so that water recycling can be realized in the whole sulfate production process, and a lot of water resources are saved; (2) a certain proportion of NCM sulfatemixture is obtained by utilizing a crystalizing principle, so that a quality requirement on producing the ternary precursor can be met, an extraction process is avoided, and the generation of a lot ofwastewater and waste gas is avoided; (3) according to an ingredient proportion requirement of the ternary precursor material, bits of nickel sulfate, cobaltous sulfate and manganese sulfate are usedfor adjusting so as to accomplish the preparation before synthesis, so that the process is simplified, and meanwhile, the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of recycling waste lithium ion batteries, in particular to a process for recycling and manufacturing a ternary precursor by using waste lithium ion batteries as raw materials. Background technique [0002] The recycling and resource utilization of waste batteries has become an important issue that must be faced in my country's environmental protection and sustainable development of the battery industry. my country is currently the largest battery production and consumption country in the world. With the popularization of mobile phones, notebook computers, digital products and other portable products, rechargeable batteries such as lithium-ion batteries have become consumer goods for people's daily life; especially nickel-cobalt-manganese With the explosion of electric vehicles with lithium-ion batteries made of primary materials, the amount of scrapped batteries produced has also increased exponentially. Because waste...

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Problems solved by technology

[0003] At present, the existing technologies for recycling lithium-ion batteries generally adopt pyrolysis, crushing, sorting, leaching, impurity removal, nickel-cobalt-manganese extraction, and precursor synthesis processes; in this process, the extraction process will use extractants , organic solvents, sodium hydroxide, and hydrochloric acid will produce a large amount of organic volatile substances and waste water, which will bring huge pressure to the environment. Although the use of environmental protection facilities can achieve certain effects, it will also bring certain pressure to production costs; In particular, organic solvents are flammable and explosive, and there are certain safety hazards

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