Waste circuit board recovery system

Abstract

The invention relates to a waste circuit board recovery system, which comprises a crushing subsystem, a grinding and separating subsystem, a powder grading subsystem and a metal separating and sorting subsystem, wherein the crushing subsystem is used for preprocessing raw materials, namely, crushing waste circuit boards into strip and blocky materials; the grinding and separating subsystem is in sealed connection with the crushing subsystem and is used for grinding the crushed strip and blocky materials into granular powder; the powder grading subsystem is in sealed connection with the grinding and separating subsystem and is used for grading the granular powder; and the metal separating and sorting subsystem is in sealed connected with the grinding and separating subsystem and is used for separating metal components from and nonmetal components. The waste circuit board recovery system provided by the invention reduces the energy consumption, manufacturing cost and operation cost of recovery equipment.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a recycling and processing system for waste circuit boards. Background technique [0002] With the advent of the information age and the rapid development of the electronics industry, electronic waste pollution is inevitably in front of us. Circuit boards, which are the core components of various electronic and electrical products, are being discarded more and more. There are many heavy metals and other toxic and harmful substances in waste printed circuit boards, which need to be properly disposed of. If they are discarded directly, it will put a lot of pressure on environmental protection, and it is also a great waste of resources. [0003] At present, there are three main methods of recycling waste circuit boards in China: one is heat treatment, including incineration, cracking, direct smelting, etc., to burn non-metals and extract copper and other precious metals. This method will cau...

AI Technical Summary

Problems solved by technology

There are many heavy metals and other toxic and harmful substances in waste printed circuit boards, which need to be properly disposed of. If they are discarded directly, it will cause great pressure on environmental protection and a great waste of resources.

[0003] At present, there are three main methods of recycling waste circuit boards in China: one is heat treatment, including incineration, cracking, direct smelting, etc., to burn non-metals and extract copper and other precious metals. This method will cause serious damage. Air pollution, burning flue gas is toxic and not easy to handle, which has a great impact on human health and the ecological environment; the second is chemical treatment, including pickling, corrosion, etc. The waste liquid and residue generated by these methods are not treated at will. Dumping will cause re-pollution to the environment; the third is physical treatment methods, including mechanical crushing, crushing and electrostatic or airflow sorting, which are the main methods advocated at home and abroad at present, and are also the trend of future development. This kind of physical resources The main feature of chemical recycling is that there is almost no pollution to the production and working environment, and the recovered metal and non-metallic powders can be recycled as resources. However, the existing physical recycling equipment production lines in China are not very mature. There are defects such as complex process, large equipment investment and floor space, low production efficiency, high operating cost and energy consumption

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