Device and method for recovering metal from fine-grained broken product of waste circuit board

Abstract

The invention discloses a device and a method for recovering metal from a fine-grained broken product of a waste circuit board, and belongs to the field of resource recovery of waste circuit boards. Valuable metals are recovered from fine-grained broken products of waste circuit boards by utilizing triboelectric charges and charge attenuation characteristic differences of organic components, inorganic components and metal components in the broken products of the waste circuit boards and adopting a triboelectric separation method. The method comprises the following steps that: frictional chargeamong particles is strengthened by virtue of a mechanical stirring type frictional charge device; the particles enter an electric field after being fully tribbed and charged; the organic components and the inorganic components carry opposite charges and respectively move towards two sides of an electric field under the action of horizontal electric field force; the metal particles are weak in charge intensity and fast in charge disappearance, are slightly affected by horizontal electric field force after entering an electric field and fall into a material collecting groove in the middle of the electric field under the action of gravity, and finally, separation of organic components, inorganic components and metal components is achieved.

Description

technical field [0001] The invention belongs to the technical field of recycling waste circuit boards, in particular to a device and method for recovering metal from fine-grained crushed products of waste circuit boards. Background technique [0002] In recent years, with the intensification of the replacement of electronic products, the number of various types of scrapped electronic products has shown a "blowout" growth, and as an essential component of electronic products, the output of discarded circuit boards has also increased sharply. Waste circuit boards contain a large amount of valuable metals such as copper, aluminum, and tin, which belong to high-grade "metal mines" and are extremely valuable for recycling. In addition, discarded circuit boards, as one of the hazardous wastes, will bring a series of environmental problems if they cannot be effectively recycled. [0003] The efficient recovery of metal components in waste circuit boards has always been the focus o...

AI Technical Summary

Problems solved by technology

In addition, as one of the hazardous wastes, discarded circuit boards will bring a series of environmental problems if they cannot be effectively recycled.

[0003] The efficient recovery of metal components in waste circuit boards has always been the focus of attention. At present, the commonly used physical separation methods mainly include gravity separation, flotation, and corona electrostatic separation. The separation efficiency of fine-grained crushed products is low. Although the flotation method can realize the separation of fine-grained metals and non-metals, the flotation process requires water media, which is prone to water pollution.

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