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A kind of recovery method of aluminum case capacitor

A recycling method and capacitor technology, applied to the removal of solid waste, etc., can solve the problems of high cost and harsh conditions, and achieve the effects of recycling, low processing temperature and mild reaction conditions

Active Publication Date: 2022-06-21
广州雅居乐固体废物处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application number is 201410779034.5 and the invention patent application titled the treatment and recycling method of waste aluminum electrolytic capacitors discloses a treatment method for aluminum electrolytic capacitors. Recover aluminum and iron by crushing, screening and magnetically separating pyrolysis residues, but this method needs to be carried out under high temperature conditions, the conditions are relatively harsh, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] As a recycling method of an aluminum shell capacitor according to an embodiment of the present invention, the method includes the following steps:

[0031] (1) After crushing the aluminum shell capacitor, a crushed object A with a particle size of 1 to 5 mm is obtained;

[0032] (2) immersing the broken object A in the leaching solution B for 90 minutes at 80° C. for shaking reaction, the leaching solution is made up of sodium hypochlorite and sodium hydroxide, and the mass concentration of sodium hypochlorite in the leaching solution B is 2.5 %, the concentration of sodium hydroxide in the leaching solution is 0.4mol / L, and the consumption ratio of the broken product A and the leaching solution B is 1.5kg / L;

[0033] (3) the product after the step (2) reaction is carried out solid-liquid separation to obtain filtrate C and solid D;

[0034] (4) The solid D is dried and ground to a particle size of 0.1-0.5 mm, and then air-selected to obtain aluminum powder, steel powd...

Embodiment 2

[0036] As an embodiment of the present invention, a method for recycling aluminum shell capacitors, the only difference between this embodiment and Embodiment 1 is that the mass concentration of sodium hypochlorite in the leaching solution B is 0.5%, and the concentration of sodium hypochlorite in the leaching solution B is 0.5%. The concentration of sodium was 0.1 mol / L.

Embodiment 3

[0038] As an embodiment of the present invention, a method for recycling aluminum shell capacitors, the only difference between this embodiment and Embodiment 1 is that the mass concentration of sodium hypochlorite in the leaching solution B is 1.5%, and the concentration of sodium hypochlorite in the leaching solution B is 1.5%. The concentration of sodium was 0.2 mol / L.

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PUM

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Abstract

The invention provides a recovery method of an aluminum shell capacitor, the method comprising the following steps: (1) breaking the aluminum shell capacitor to obtain a broken object A; (2) immersing the broken object A in an extract B in Reaction at 70°C to 90°C, the extract includes oxidant and alkali; (3) solid-liquid separation of the reacted product in step (2) to obtain filtrate C and solid D; (4) after drying the solid D Air selection is carried out. The content of organic matter in the liquid treated by the method of the present invention is very low, and the residual amount of organic matter in the obtained solid recovery product is very low, indicating that the organic compound used as a solvent in the aluminum shell capacitor has been degraded, and the above method has successfully realized the aluminum Shell capacitors can be recycled, and the above method has low treatment temperature, mild reaction conditions, and no organic waste gas and organic waste liquid.

Description

technical field [0001] The invention relates to the field of electronic product solid waste treatment, in particular to a method for recycling aluminum shell capacitors. Background technique [0002] Capacitors are one of the electronic components with the largest consumption at present, accounting for about 40% of the total consumption of electronic components. And aluminum shell capacitors are widely used in the electronics industry because of their high capacity, good stability, and low cost, and their consumption accounts for about 50% of the total capacitor consumption. Generally speaking, the computer circuit board contains about 30-60 aluminum shell capacitors, the power circuit board contains about 10-32 aluminum shell capacitors, and the display circuit board contains about 15-118 aluminum shell capacitors. Undoubtedly, a large number of aluminum shell capacitors are discarded with the abandonment of electronic and electrical equipment. However, aluminum shell capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/35B09B5/00
CPCB09B3/00B09B5/00
Inventor 唐映红刘富强竺海峰邱传宝
Owner 广州雅居乐固体废物处理有限公司