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Processing and recycling method for waste aluminum electrolytic capacitor

A technology of aluminum electrolytic capacitors and recycling methods, which is applied in the field of recycling and industrial waste treatment, can solve the problems of great harm to the ecological environment and human health, achieve high recovery rate and purity, clean treatment process, and high degree of recycling Effect

Inactive Publication Date: 2015-05-20
SHANGHAI JIAO TONG UNIV
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  • Application Information

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Problems solved by technology

Since the electrolyte contains a large number of harmful components, this method is extremely harmful to the ecological environment and human health.

Method used

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  • Processing and recycling method for waste aluminum electrolytic capacitor

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Embodiment 1

[0029] First, raise the temperature of the muffle furnace to 500°C and keep it at a constant temperature, then put the waste aluminum electrolytic capacitor disassembled from the waste printed circuit board into the muffle furnace and heat it for 60 minutes to heat the non-metallic components. The pyrolysis process of waste aluminum electrolytic capacitors loses 38.08% of the weight during the pyrolysis process. The tail gas generated during the pyrolysis process naturally flows out through the gas discharge channel and is discharged after being adsorbed by activated carbon; the pyrolysis residues of waste aluminum electrolytic capacitors are taken out and sent to into the shearing crusher, the crushing time is 45 seconds, and the dissociation degree of metal and non-metal materials is 100%; then the crushed materials are screened with a 0.18mm screen to completely separate the metal components from the non-metal components, Thereby obtain aluminum-iron metal mixed particle, ut...

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Abstract

The invention discloses a processing and recycling method for a waste aluminum electrolytic capacitor. The processing and recycling method comprises the following steps: putting the waste aluminum electrolytic capacitor into a thermal treatment device to perform pyrolysis of nonmetal components, wherein the pyrolysis temperature is 400-600 DEG C, the pyrolysis time is 0.5-2 hours, and the pyrolysis treatment atmosphere is air; then, crushing obtained pyrolysis residues until metal components and nonmetal components are completely dissociated; screening crushed mixed particles through a screen of 0.1-0.3 mm to respectively obtain nonmetal pyrolysis residue powder and aluminum-iron metal mixed particles; performing magnetic separation on the aluminum-iron metal mixed particles and completely separating and recycling the iron metal particles and the aluminum metal particles. The processing and recycling method realizes recycling with high recovery rate and high purity of the aluminum and the iron, is clean in a processing process, does not discharge any toxic and harmful substances to an environment, has the characteristics of being simple and convenient to operate, short in flow, efficient, environment-friendly and high in recycling degree, and is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to a treatment and recovery method of waste aluminum electrolytic capacitors, which is a treatment method for harmless and resourceful aluminum electrolytic capacitors. The invention belongs to the field of industrial waste treatment and recycling in the technical field of environmental protection. Background technique [0002] According to statistics, there are currently 50 million tons of electronic waste generated in the world, 70% of which are shipped to China for processing. Among them, capacitors are indispensable electronic components in various electronic products. They have a wide range of uses and are used in the largest amount, accounting for about 40% of all electronic components. And because of its relatively low price and relatively stable performance, aluminum electrolytic capacitors use more than 30% of the three types of capacitors (electrolytic capacitors, ceramic capacitors and organic film capacitors). Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00B02C21/00
CPCY02W30/20
Inventor 许振明王建波
Owner SHANGHAI JIAO TONG UNIV
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