Ultrasonic high-voltage electrostatic separation method and system for waste printed circuit board powder

Abstract

The invention discloses an ultrasonic high-voltage electrostatic separation method and an ultrasonic high-voltage electrostatic separation system for waste printed circuit board powder, and belongs to the technical field of waste printed circuit board recycled resource circulation. The system mainly comprises a feeding device, a mixing cavity and a discharge port; an ultrasonic generator and a corona electrode are arranged in the mixing cavity; crushed waste printed circuit board particles with the particle size of 50-100 meshes are added into the mixing cavity through the feeding device; under the action of ultrasonic waves, problems of adhesion, agglomeration and the like between the particles are solved, the environmental humidity is reduced, and the electrostatic effect is enhanced; the corona electrode makes metal and nonmetal particles obtain electric charge; and the metal and nonmetal particles are discharged through the discharge port and pass through a discharge polar plate, the metal particles quickly loses the electric charge, and the nonmetal particles with the electric charge are adsorbed on the surface of a high-voltage earthing electrostatic roller, and are brushed off by a roller brush to reach a nonmetal collection tank, the metal particles are thrown off to reach a metal collection tank, so that the metal particles and the nonmetal particles are effectively separated. The invention has the characteristics of high practicability, good separation effect and the like.

Description

Technical field: [0001] The invention relates to an ultrasonic high-voltage electrostatic separation method for waste printed circuit board powder and a system thereof, which is used for effective, harmless and resource-based recovery of waste printed circuit boards, and belongs to the technical field of resource recycling. Background technique: [0002] With economic development and scientific and technological progress, the electronic industry and information high-tech industry are developing rapidly, and the problem of electronic waste is inevitably placed in front of us. A large number of waste electrical appliances are abandoned to form electronic waste, which has gradually become an important part of municipal solid waste. E-waste has two sides of value and harm. Electronic waste contains a large amount of organic substances such as metals and bromine-containing flame retardants, and conventional treatment methods may cause long-term harm to the environment; at the sa...

AI Technical Summary

Problems solved by technology

The fine particles crushed by this process are prone to agglomeration due to the interaction force and the influence of environmental humidity, which affects the effect of electrostatic separation and cannot be effectively recycled.

According to foreign reports, the processing method adopted abroad is to use liquid nitrogen to freeze waste Indian brush circuit boards, and then crush and sort them. Sorting includes electric separation, eddy current separation, magnetic separation, airflow separation, and separation. There are many classifications in the process, the process is trivial, the efficiency of airflow sorting is low, and the sorting effect on fine-grained materials (-0.074mm) is poor, and industrial scale cannot be realized.

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