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High-voltage electrostatic separation method for plastics reclaimed from waste electronic and electric products

An electronic appliance, high-voltage electrostatic technology, applied in electrostatic effect separation, chemical instruments and methods, solid separation, etc., can solve problems such as inability to meet the needs of use, low recovery rate, inconvenient production, etc., and achieve large processing capacity and plastic purity. High, good separation effect

Inactive Publication Date: 2011-09-28
YANGZHOU NINGDA NOBLE METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of inconvenient production and low recovery rate of the existing technology, the inventor proposed a new process, that is, PS, PP, and ABS were respectively obtained through sorting and dismantling, crushing, magnetic separation, eddy current electric separation, and suspension winnowing. , PVC and other single-component thermoplastic granule products
However, the purity of single-component thermoplastic granule products obtained only by suspension winnowing can only reach 90%, which cannot meet the needs of use

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Steps:

[0011] 1. Sorting and dismantling: waste electronic appliances are sorted by type, and then manual and mechanical flow dismantling operations are carried out on the automatic conveying physical dismantling table. The dismantling is completed from the outside to the inside, and the separated plastic or plastic parts.

[0012] 2. Crushing: Perform low-speed primary crushing on disassembled plastic shells and plastic-containing parts, so that large pieces of plastic are broken into small pieces of plastic, and then transported by the conveyor to a closed high-speed crushing machine for secondary crushing. Broken materials with a particle size of less than 3cm are extracted and separated by negative pressure at the same time.

[0013] 3. Magnetic separation: The crushed material is conveyed into the drum magnetic separator, and the iron material is absorbed and separated from the crushed material. After the separation, the iron material and the remaining material ...

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Abstract

The invention discloses a high-voltage electrostatic separation method for plastics reclaimed from waste electronic and electric products, and relates to a separation and purification method for plastics in waste electronic and electric products. Mutual friction is realized by stirring the plastics in a friction cyclone made of polyethylene terephthalate (PET) material, so that the plastics are electrified by friction; according to different frictional electrification properties of the plastics, the plastics electrified by friction are contacted with rotary electrodes to provide a high-voltage electrostatic field; because of the combined action of a centrifugal force and an electrostatic force, falling plastic granules are thrown from the rotary electrodes; because of different potentials, the plastic granules are in different loci and produce certain distance; and the plastic granules are classified and collected by using a container with a partition board, so that separation and purification of different plastics are realized, and finally, single-component thermoplastic granule products with purity of 95 percent such as polystyrene (PS), polypropylene (PP), acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC) and the like are reclaimed.

Description

technical field [0001] The invention relates to a method for separating and purifying plastics in waste electronic appliances, belonging to the technical field of metallurgy and chemical industry. Background technique [0002] Plastics are widely used in various electronic and electrical equipment. As a large number of these electronic and electrical appliances enter the end-of-life period, the proportion of waste plastics in urban solid waste is getting higher and higher. The recycling of plastics in waste electronic and electrical appliances has become a social issue. issues of general concern. In my country, plastics for electronic appliances account for 10-20% of the total consumption of plastics. The most common types include ABS, PP, PS, PVC, etc., which have high resource utilization value. Each computer uses 3kg of plastics, TV sets Using 4kg of plastic, 5kg of plastic for refrigerators, and 100g for mobile phones, these scrapped electronic and electrical products wi...

Claims

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Application Information

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IPC IPC(8): B03C11/00
Inventor 樊红杰岳喜龙
Owner YANGZHOU NINGDA NOBLE METAL CO LTD
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