Method for recovering copper in waste circuit board

Abstract

The invention discloses a method for recovering copper in a waste circuit board, and the method comprises the following steps of sending the waste circuit board into a vibration device to be vibrated;performing crushing by a first-stage crusher; performing crushing by a second-stage crusher; performing crushing by a third-stage crusher; sorting waste particles by an airflow sorting machine through using the characteristics of different particle proportions, sorting the high-density copper chips for storage and standby, and sending the mixed particles with low density to a pulse dust collector; pulse dust removal; sorting the mixed particles entering an electrostatic separator by the electrostatic separator through using an electrostatic separation principle, and storing the selected copper chips and resin particles separately. The method for recovering copper in the waste circuit board is cleverly designed. After crushing the waste circuit board for many times, the air flow separationand electrostatic separation are performed successively to separate resin particles from the copper, and then the problem that the existing copper recycling process generates a large amount of wastegas and waste water is avoided, therefore the method is clean and environment-friendly.

Description

technical field [0001] The invention relates to copper recovery technology, in particular to a copper recovery method in waste circuit boards. Background technique [0002] As the basic components of various electrical appliances and equipment, the circuit board itself is composed of a substrate and electronic components. The substrate is made of resin material wrapped copper sheet; currently, wet treatment and direct smelting are usually used for recycling waste circuit boards: wet method Treatment is a separation method of crushing and shaker treatment. A large amount of cleaning water is required in the production process. Although the cleaning water can be recycled, after the recycling time, the water quality will become smelly and a large amount of sewage will be generated. Direct smelting method, the smelting process produces a large amount of waste water and waste gas, causing serious pollution to the environment. Contents of the invention [0003] In order to over...

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Problems solved by technology

[0002] As the basic components of various electrical appliances and equipment, the circuit board itself is composed of substrates and electronic components. The substrate is made of copper sheets wrapped with resin materials; at present, wet processing and direct smelting methods are usually used for recycling waste circuit boards: wet method Treatment is a separation method of crushing and shaker treatment. In the production process, a large amount of cleaning water is required. Although the cleaning water can be recycled, after the recycling time, the water quality will become smelly and a large amount of sewage will be generated.

Direct smelting method, the smelting process produces a large amount of waste water and waste gas, causing serious pollution to the environment

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