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Method for recovering and separating PCB by dry method

A dry recovery and dissociation technology, applied in the directions of magnetic separation, solid separation, electrostatic effect separation, etc., can solve the problems of complex recovery process and cumbersome sorting process, and achieve simple recovery process, high metal recovery rate, and separation good effect

Inactive Publication Date: 2010-05-12
HUIZHOU DINGCHEN IND DEV
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage is that the material after iron removal is divided into coarse-grained, coarse-grained, intermediate-grained, fine-grained and fine-grained for sorting; the recovery process is more complicated and the sorting process is cumbersome

Method used

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Embodiment Construction

[0016] The technical process of dry recovery and separation technology of the present invention is as follows:

[0017] Feeding→coarse crushing→magnetic separation→medium crushing→magnetic separation→eddy current separation→fine crushing→electrostatic separation.

[0018] The waste PCB is put into the coarse crusher to crush the PCB into small pieces of about 20mm; of course, there are also small pieces smaller than 20mm in the crushed materials.

[0019] The above-mentioned obtained materials are passed through a magnetic separator to select broken and separated iron pieces in the materials to avoid damage to subsequent equipment.

[0020] Put the rest of the materials after the separation of iron nuggets into the crusher to break them into small pieces of 5mm, and then pass the materials through the magnetic separator to further select the broken and separated iron nuggets in the materials.

[0021] The rest of the materials after separating the iron pieces are sent to the ...

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Abstract

The invention relates to a method for recovering and separating a printing electronic circuit board (PCB for short) by a dry method. The method comprises the following steps: putting waste PCB into a primary crusher to be crushed to be 20mm of small blocks; selecting crushed and separated iron blocks from the crushed materials by using a magnetic separator; putting the remaining materials after separating the iron blocks into an intermediate crusher to be crushed to be 5mm of small blocks; further selecting the crushed and separated iron blocks from the crushed materials by using the magnetic separator; further putting the remaining materials after separating the iron blocks into a whirlpool separator to separate metals mainly including aluminium and tin from the materials which are not disintegrated; and delivering the materials which are not disintegrated into a micro-particle pulverizer to be crushed to be 20-60 meshes, and then delivering the crushed materials into an electrostatic separator to separate copper from fiber resin. In the method, higher metal recovery rate is realized, and waste water and waste gas are not generated in the process of production, thus having good economic and environment protective benefits.

Description

technical field [0001] The invention relates to a dry method for recovering and separating printed electronic circuit boards (abbreviated as PCB). Background technique [0002] At present, the separation and recovery methods of waste PCB are mainly wet treatment and direct smelting method: wet treatment is a separation method after crushing and shaking table treatment. A large amount of cleaning water is required in the production process. Although the cleaning water can be recycled, if the recycling time is too long, the water quality will become smelly and a large amount of sewage will be generated. The direct smelting method produces a large amount of waste water and waste gas during the smelting process, causing serious pollution to the environment. [0003] Chinese patent number 03113180.8, announcement number CN1535760A, application date 2003.04.11, announcement date 2004.10.13, titled "Dry physical recovery process of valuable components on electronic waste boards" d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B5/00B03C1/02B03C7/02
Inventor 林春涛
Owner HUIZHOU DINGCHEN IND DEV