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Recovery method for metals in waste printed circuit boards

A printed circuit board and recycling method technology, applied in the fields of electronic waste recycling and valuable metal recycling, can solve problems such as long production cycle, and achieve the effect of simple operation and rapid separation

Inactive Publication Date: 2016-02-03
陈梦君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have a long production cycle, and the waste liquid and waste gas treatment problems need to be solved urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The samples of waste printed circuit boards (WPCBs) purchased from a waste home appliance recycling station are mechanically processed, that is, crushed, and can be crushed with a shredder to crush the waste printed circuit boards into fragments with a particle size of less than 1mm, and then the WPCBs The samples were dried at 105°C for 24 h and stored for later use. Take the dried WPCBs sample fragments and the prepared electrolyte and add them to the electrolytic reactor according to the mass volume ratio of 3:100 (g / L). In this embodiment, weigh 3 g of the dried WPCBs sample fragments, add In the anode tank of the electrolytic reactor, the electrolytic reactor used uses a graphite rod as the anode and a titanium mesh as the cathode, and the titanium mesh is a cylindrical structure. As a preferred version of the embodiment of the present invention, the anode and the cathode of the electrolytic reactor used can be separated by glass sand cores, the glass sand cores ar...

Embodiment 2

[0038] The samples of waste printed circuit boards (WPCBs) purchased from a waste home appliance recycling station are mechanically processed, that is, crushed, and can be crushed with a shredder to crush the waste printed circuit boards into fragments with a particle size of less than 1mm, and then the WPCBs The samples were dried at 105°C for 24 h and stored for later use. Take the dried WPCBs sample fragments and the prepared electrolyte and add them to the electrolytic reactor according to the mass volume ratio of 3:100 (g / L). In this embodiment, weigh 3 g of the dried WPCBs sample fragments, add In the anode tank of the electrolytic reactor, the electrolytic reactor used uses a graphite rod as the anode and a titanium mesh as the cathode, and the titanium mesh is a cylindrical structure. As a preferred version of the embodiment of the present invention, the anode and the cathode of the electrolytic reactor used can be separated by glass sand cores, the glass sand cores ar...

Embodiment 3

[0041] The samples of waste printed circuit boards (WPCBs) purchased from a waste home appliance recycling station are mechanically processed, that is, crushed, and can be crushed with a shredder to crush the waste printed circuit boards into fragments with a particle size of less than 1mm, and then the WPCBs The samples were dried at 105°C for 24 h and stored for later use. Take the dried WPCBs sample fragments and the prepared electrolyte and add them to the electrolytic reactor according to the mass volume ratio of 3:100 (g / L). In this embodiment, weigh 3 g of the dried WPCBs sample fragments, add In the anode tank of the electrolytic reactor, the electrolytic reactor used uses a graphite rod as the anode and a titanium mesh as the cathode, and the titanium mesh is a cylindrical structure. As a preferred version of the embodiment of the present invention, the anode and the cathode of the electrolytic reactor used can be separated by glass sand cores, the glass sand cores ar...

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Abstract

The invention discloses a recovery method for metals in waste printed circuit boards. The recovery method comprises the following steps: step 1, adding the samples obtained after mechanically crushing the waste printed circuit boards in an anode groove of an electrolysis reactor, and adding an electrolyte composed of copper sulphate, sodium chloride, sulphuric acid and deionized water in the electrolysis reactor simultaneously; step 2, charging ozone in the anode groove, stirring simultaneously, and then turning on a power supply and carrying out electrolysis; and step 3, after the completion of the electrolysis reaction, collecting metal powder enriched and deposited on the surface of a cathode, and washing and drying to obtain the recovered metals. According to the invention, the metals in the waste printed circuit boards are recovered by means of ore pulp electrolysis, rapid separation for the metals and non-metals can be realized, the metals can be effectively recovered, the recovery rate of the metals can achieve more than 85%, and the highest recovery rate can achieve 96.51%. The recovery method is an environment-friendly type treatment method which is simple and convenient to operate, green and efficient.

Description

technical field [0001] The invention belongs to the technical field of recycling electronic waste and recycling valuable metals, and in particular relates to a method for recycling metals in waste printed circuit boards. Background technique [0002] The development of the electronic information industry and the upgrading of electronic products have led to the generation of a large amount of electronic waste. Printed circuit boards are the basic components of electronic and electrical products and widely exist in various electronic products. Therefore, the disposal of waste printed circuit boards (WastePrintedCircuitBoards, WPCBs) that have been eliminated along with the increase of electronic waste has become the focus of attention. Waste printed circuit boards have complex components and contain a large number of carcinogenic and teratogenic substances. If these substances are not handled properly, they will cause great harm to the environment and human health. But in t...

Claims

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Application Information

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IPC IPC(8): C25C5/02
Inventor 陈梦君王蓉楚莹莹李云桂王彬陈海焱谌书
Owner 陈梦君
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