Method for synthetically recycling waste printed circuit board

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...

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 technology still faces various problems, and the technology to realize resourceful, harmless and large-scale treatment of waste printed circuit boards with low cost and high efficiency is still the focus of research

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