Novel method for comprehensively recovering cobalt, nickel, manganese and lithium elements from ternary battery waste

Abstract

The invention discloses a novel method for comprehensively recycling cobalt, nickel, manganese and lithium elements from ternary battery waste and relates to a recycling method of the battery waste. The method comprises steps of disassembling a waste ternary battery to obtain waste ternary battery powder, carrying out acid leaching, copper removal, iron and aluminum removal and the like to obtainimpurity removal solution, regulating a pH value of the impurity removal solution with sodium hydroxide, precipitating mixture of cobalt hydroxide and nickel hydroxide, vulcanizing and precipitating residual cobalt and nickel ions with sodium sulfide, separating manganese ions from cobalt and nickel ions, and directly precipitating manganese hydroxide to prevent manganese ions from entering the extraction process, dissolving the cobalt hydroxide and nickel hydroxide mixture with sulfuric acid, extracting to remove impurities, separating cobalt and nickel to obtain pure nickel sulfate solution,precipitating with sodium hydroxide, and reversely washing for three times to obtain a battery-grade nickel hydroxide product. The method is advantaged in that a problem of high recovery cost causedby the fact that the cobalt, nickel and manganese elements must be subjected to extraction and back extraction in the prior art is solved, by innovating a process route, most of manganese ions are separated and removed before extraction, nickel ions are not subjected to the full-extraction and full-reverse extraction process, and nickel hydroxide is directly precipitated only after the related impurities are removed by extraction. The method has advantages of simple process, reduction of material consumption and energy consumption and remarkable reduction of production cost.

Description

technical field [0001] The invention relates to a method for recycling waste battery materials. Background technique [0002] In the process of dismantling and recycling waste ternary battery materials, the method adopted in the prior art is: the waste ternary battery is disassembled to obtain waste positive electrode material powder, and then acid leached to remove copper, iron, aluminum, After operations such as calcium and magnesium removal, after obtaining the pre-extraction solution, there are generally two process routes: one is to obtain a cobalt-nickel-manganese mixed salt solution through full extraction and full reaction, and then use sodium hydroxide to synthesize a ternary precursor for recovery after batching; High-concentration pure cobalt sulfate, nickel sulfate, and manganese sulfate solutions are obtained through fractional extraction and separation. They are evaporated and concentrated to crystallize, and then manufactured into battery-grade cobalt sulfate,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the recovery of cobalt, nickel and manganese elements in the prior art must all go through extraction and stripping process routes, resulting in high recovery costs, and discloses a process that is simple, reduces material consumption and energy consumption, and significantly reduces production costs. A new method for comprehensive recovery of cobalt, nickel, manganese, manganese and lithium elements from ternary battery waste

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