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Integrated recovery method of waste and old rare earth capacitance battery

A capacitor battery and recycling method technology, applied in the direction of improving process efficiency, etc., can solve the problems that it cannot be used as a power battery electrode material, the electrochemical performance of nickel hydroxide is general, and the process environmental protection is low, and achieves low price and particle size distribution. The effect of uniformity and high recovery purity

Active Publication Date: 2015-05-13
淄博国利新电源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Integrated recovery method of waste and old rare earth capacitance battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] a. Cut the waste rare earth capacitor battery and separate the battery cell and parts:

[0047] Use a laser cutting machine to cut waste rare earth capacitor batteries, take out the battery core including the plate and diaphragm, and take out the parts including the battery case, top cover, safety valve, pole, lug, nut, flat gasket and gasket.

[0048] b. Ultrasonic soak the cell with NaOH, and then separate the diaphragm and nickel foam to obtain the soaking solution:

[0049] Soak the cell and pure water at a mass ratio of 1:0.8, then add NaOH for ultrasonic soaking, the ratio of NaOH to pure water is 0.1:1, NaOH is measured in moles, and pure water is measured in L. Use 2000W ultrasonic power to intermittently ultrasonicate 4 times, the cumulative time is 20min, the soaking temperature is 75°C, and the soaking time is 1h, then take out the foamed nickel from which the electrode material has been separated, wash and dry, take out the diaphragm, wash and dry, and the r...

Embodiment 2

[0058] a. Cut the waste rare earth capacitor battery and separate the battery cell and parts:

[0059] Use a laser cutting machine to cut waste rare earth capacitor batteries, take out the battery core including the plate and diaphragm, and take out the parts including the battery case, top cover, safety valve, pole, lug, nut, flat gasket and gasket.

[0060] b. Soak the cell with NaOH, then separate the diaphragm and nickel foam to obtain the soaking solution:

[0061] Soak the cell and pure water at a mass ratio of 1:1, and then add NaOH for ultrasonic soaking. The ratio of NaOH to pure water is 0.2, NaOH is measured in mol, and pure water is measured in L. Use 1000W ultrasonic power to ultrasonicate 8 times intermittently, the cumulative time is 30min, the soaking temperature is 40°C, and the soaking time is 3h, then take out the foamed nickel from which the electrode material has been separated, wash and dry, take out the diaphragm, wash and dry, and the rest is the soakin...

Embodiment 3

[0070] a. Cut the waste rare earth capacitor battery and separate the battery cell and parts:

[0071] Use a laser cutting machine to cut waste rare earth capacitor batteries, take out the battery core including the plate and diaphragm, and take out the parts including the battery case, top cover, safety valve, pole, lug, nut, flat gasket and gasket.

[0072] b. Soak the cell with NaOH, then separate the diaphragm and nickel foam to obtain the soaking solution:

[0073] Soak the cell and pure water at a mass ratio of 1:1, add NaOH for ultrasonic soaking, the ratio of NaOH to pure water is 0.15:1, NaOH is measured in mol, and pure water is measured in L. Use 1500W ultrasonic power to ultrasonicate 6 times intermittently, the cumulative time is 25min, the soaking temperature is 60°C, and the soaking time is 2h, then take out the nickel foam that has been separated from the electrode material, wash and dry, take out the diaphragm, wash and dry, and the rest is the soaking solutio...

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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 nonferrous metallurgy of metal resources such as rare earth and nickel. Background technique [0002] Since the beginning of the 21st century, with the increasing energy crisis and environmental pollution, the call for energy conservation and emission reduction has become increasingly high. The stable growth of the world economy and the sustainable development of human society also urgently require the development of new energy sources and improved energy utilization methods. Pure electric buses equipped with rare-earth capacitor batteries have attracted widespread attention because of their high concentration, and their promotion and application have obvious advantages in environmental, economic and social benefits. [0003] Rare earth capacitor batteries will produce a certain amount of waste products during the man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B3/04C22B3/22C22B3/38C22B23/00C22B59/00
CPCY02P10/20
Inventor 蒋志军张亚莉于先进刘开宇
Owner 淄博国利新电源科技有限公司
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