Integrated recovery method of waste and old rare earth capacitance battery

Abstract

The invention relates to an integrated recovery method of waste and old rare earth capacitance battery, which belongs to the colored metallurgy technology field of rare earth, nickel and other metal resources. The method comprises the following steps: cutting waste and old rare earth capacitance battery, separating electrical core and components; adding NaOH into electrical core for ultrasonic immersion, and then separating diaphragm and foamed nickel, and obtaining the soak solution; filtering, dissolving filter residues with sulfuric acid and H2O2; filtering, adding Na2SO4 into the filtrate for reaction; filtering the reaction solution, and the filter residue is a rare earth sulfuric acid composite salt, and obtaining battery grade nickel sulfate and cobalt sulphateby P204 edulcoration, P507 extraction separation and re-extraction. The invention realizes the grading recovery of battery spare and accessory parts and battery materials, and separation of battery spare and accessory parts and electrical core, and recycle of battery housing and pole, and separation and re-utilization of rare earth, nickel and cobalt, thereby establishing a base for dynamic reservations of rare earth, nickel and other rare resources with low cost and obvious economic benefit.

Description

Technical field [0001] The invention relates to a comprehensive recovery method for waste rare earth capacitor batteries, and belongs to the technical field of rare earth, nickel and other metal resources non-ferrous metallurgy. Background technique [0002] Since the beginning of the 21st century, with the ever-increasing energy crisis and environmental pollution, calls for energy conservation and emission reduction are increasing, the steady growth of the world economy and the sustainable development of human society also urgently need to develop new types of energy and improve energy utilization. Pure electric buses equipped with rare-earth capacitor batteries have received widespread attention due to their high concentration and the obvious advantages of environmental, economic and social benefits in their promotion and application. [0003] Rare-earth capacitor batteries will produce a certain amount of waste during the manufacturing process, and they need to be disposed of af...

AI Technical Summary

Problems solved by technology

CN102959102A patent adopts sulfate precipitation for rare earth separation, rare earth sulfate precipitation has low purity, subsequent separation of nickel and cobalt uses sulfide, nickel and cobalt are precipitated at the same time, and cannot be effectively separated, resulting in difficulties in subsequent processing; while CN101886178A patent adopts P204 extraction The mixed solution of nickel sulfate and cobalt sulfate is extracted at one time, and the spherical nickel hydroxide is synthesized in the liquid phase, but the electrochemical performance of this nickel hydroxide is general, and the cobalt content fluctuates greatly, so it cannot be used as a power battery electrode material, let alone recycled; and At the same time, the mixture of nickel sulfate and cobalt sulfate cannot be directly used as raw materials for deep-processing products, which limits the scope of application, and the process has low environmental protection.

[0008] At present, there is a lack of recycling process for waste water system power batteries, especially waste rare earth capacitor batteries, which can be recycled as a whole, and the recycled materials can enter the field of rare earth capacitor battery production and manufacturing to realize an economical and circular industrial chain

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