Method for synthetically recycling waste printed circuit board

A printed circuit board and waste technology, which is applied in the field of waste printed circuit board recycling and processing, can solve the problems of high cost and low efficiency, and achieve the effects of low recycling cost, simple follow-up treatment and simple equipment.

Inactive Publication Date: 2010-01-13
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the device used in this method can only process waste printed circuit boards one by one, which has low efficiency and high cost.
[0007] The above-mentioned waste printed circuit board treatment techno

Method used

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  • Method for synthetically recycling waste printed circuit board

Examples

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Embodiment 1

[0026] like figure 1 As shown, a method for comprehensively recycling waste printed circuit boards may further comprise the steps:

[0027] (a) Put the waste printed circuit boards with electronic components in the drum used for centrifugation, and then immerse in the liquid heating medium to melt the solder. Then, the motor is used to drive the drum to rotate at a high speed, and the molten solder is filtered out through the filter holes on the wall of the drum under centrifugal action, and separated from the waste printed circuit board. The liquid heating medium used can be one of diesel oil, kerosene, paraffin oil, silicone oil, etc., and the temperature of the heating medium is controlled at 220°C~300°C. The rotation speed is controlled at 800rpm~1000rpm, the rotation time is 5-20min, and the rotation mode is intermittent rotation. The shed solder will not be oxidized in the liquid heating medium, and is still collected in the form of solder, which can be directly reused...

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Abstract

The invention provides a method for synthetically recycling a waste printed circuit board. The method comprises the following steps: (1) the waste printed circuit board with electronic elements is placed in a rotary drum and dipped in a liquid heating medium to melt soldering tin on the waste printed circuit board, the rotary drum is rotated, and the melted soldering tin can be filtered by passing through filtering holes on the wall of the rotary drum under the centrifugal effect of the rotation of the rotary drum; (2) the falling electronic elements are classified, sorted and further processed; and (3) the waste printed circuit board is coarsely crushed by adopting a cutting type crusher after the soldering tin and the electronic elements are removed, a fine crusher is adopted to fine crush the coarsely crushed printed circuit board to ensure that metal and nonmetal are mutually dissociated, and the dissociated mixing materials are separated by a pneumatic separator or a static separator to respectively obtain copper powder and nonmetal powder. The invention realizes scale treatment of the waste printed circuit board with low cost and high efficiency, and ensures that valuable substances such as nonmetal, soldering tin, copper and other metal are synthetically recycled.

Description

technical field [0001] The invention belongs to the technical field of recycling waste printed circuit boards, and relates to a method for comprehensively recycling waste printed circuit boards. Background technique [0002] With the rapid development of the electronic and electrical industry and the improvement of people's living standards, the lifespan of electronic products is shortening day by day, and the number of eliminated electrical appliances is increasing. As an important part of electronic products, the waste of printed circuit boards is also quite large. Waste printed circuit boards contain valuable substances such as gold, silver, palladium, platinum, copper, aluminum, etc., as well as harmful substances such as lead, cadmium, and brominated flame retardants. Resourceful and environmentally sound. In recent years, the treatment of waste printed circuit boards has received worldwide attention, and a lot of research work has been carried out. At present, the t...

Claims

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Application Information

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IPC IPC(8): B09B5/00B09B3/00B23K1/018
CPCY02W30/82
Inventor 丘克强杨春玉
Owner CENT SOUTH UNIV
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