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High tension electrostatic separating apparatus and method for worn-out broken printed circuit board granules

A printed circuit board and high-voltage electrostatic technology is applied in the field of high-voltage electrostatic separation devices, which can solve the problems of low sorting efficiency of airflow sorting machines, inability to achieve effective sorting, and large influence of material shape, and achieve simple structure, low cost, and high efficiency. The effect of less equipment corrosion

Inactive Publication Date: 2005-08-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Its disadvantage is that the sorting efficiency of the airflow separator is low, and it is greatly affected by the shape of the material, and it cannot achieve effective sorting for fine-grained (-0.074mm) materials

Method used

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  • High tension electrostatic separating apparatus and method for worn-out broken printed circuit board granules
  • High tension electrostatic separating apparatus and method for worn-out broken printed circuit board granules
  • High tension electrostatic separating apparatus and method for worn-out broken printed circuit board granules

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Embodiment Construction

[0020] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] The structure of the high-voltage electrostatic separation device designed for the broken particles of waste printed circuit boards in the present invention is as follows: figure 1 As shown, the feeding drum 3 with a groove is arranged at the bottom of the feeding hopper 1, the bottom of the feeding hopper 1 is connected with the vibrating feeding plate 4, the feeding vibration mechanism is arranged at the lower part of the vibrating feeding plate 4, and the vibrating feeding plate 4 is connected to the upper surface of the main drum 9 A corona electrode 7 and a static electrode 8 are arranged on the upper right side of the clockwise rotation direction of the main roller 9, a brush 5 is arranged on the left side of the main roller 9, and a non-metallic particle collection area 6 is arranged on the bottom of the main roller 9 from left to...

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Abstract

The present invention is high voltage electrostatic separation apparatus and method of crushed waste printed circuit board grains. The mixed metal and non-metal material grains fed with the composite feeding system to fall onto the surface of the main roller homogeneously via the feeding roller and the feeding vibration board are charged in the high voltage electrostatic field applied with the corona electrodes. Metal grains are attracted electrostatically by the static electrode to deviate from the main roller and fall into the metal collecting area, and the non-metal grains are repelled by the electrode to maintain on the surface of the main roller and to be brushed into the non-metal collecting area, while small amount of semiconductor grains fall in the way to the middle product collecting area. Compared with airflow separation method and water separation method, the present invention has the features of low cost, high efficiency, simple structure, no pollution and other advantages.

Description

technical field [0001] The invention relates to a high-voltage electrostatic separation device and separation method for broken particles of waste printed circuit boards, which can be used for pollution-free treatment and recycling of waste printed circuit boards. The invention belongs to the field of industrial solid waste treatment and recycling in the technical field of environmental protection. Background technique [0002] With the rapid development of the electronic information industry, a new type of solid waste, electronic waste, has emerged: including various waste computers, communication equipment, televisions, refrigerators, washing machines, and electronic instruments and meters that have been eliminated by the unit. According to expert estimates, my country currently discards about 28 million refrigerators, washing machines, computers, air conditioners and other electrical appliances every year, and the total amount of discarded electronic appliances reaches 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C7/06
Inventor 李佳许振明
Owner SHANGHAI JIAO TONG UNIV
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