Method for recycle of copper alloy from waste circuit board and cyclic reconstruction of powder metallurgical product as well as device system thereof

Abstract

The invention relates to a method for recovering a copper alloy from a waste circuit board to reproduce a sintered metal product circularly and a device system thereof. In the method, the waste circuit board on electronic equipment is subject to breaking, magnetic separation, crushing, mechanical separation and electrostatic separation to separate the waste circuit board into copper alloy powder and plastic glass powder. The method further comprises the following steps: X1) further purifying and refining the obtained copper alloy powder to prepare more purified and finer superfine copper alloy powder; X2) filling the superfine copper alloy powder into a product die for die pressing; and X3) stepwise sintering a pressed compact obtained by die pressing to obtain a powder metallurgy finished product. The method and the device system can perform pre-treatment on the waste circuit board to obtain the copper alloy powder by separation, and can perform effective subsequent treatment on the copper alloy powder obtained by separation to make a marketable product, and the treatment process is environment-friendly, economical and efficient.

Description

technical field [0001] The invention relates to the fields of environmental protection and resource recovery, and more specifically, the invention relates to a recovery method and equipment for waste electronic products. Background technique [0002] There are more and more types of electromechanical products and electronic equipment in modern society, and the quantity is getting larger and larger. Among these products / equipment, various printed circuit boards (PCBs) are used. At the same time, printed circuit boards are produced There are also many companies. [0003] Due to the acceleration of technological updates and technical problems in production, there are more and more waste printed circuit boards in electromechanical products and electronic equipment, which has caused great environmental and social problems. [0004] Although there are many types of waste printed circuit boards, their substrates are mainly single-layer or multi-layer glass fiber cloth compounded w...

AI Technical Summary

Problems solved by technology

However, the separation and purification of metal powder is only the beginning, because the metal powder obtained by crushing has complex components, which makes subsequent extraction or recycling very difficult: either the purification technology is immature, the purification cost is not worth the gain, or the composition is too complex to be used as a metallurgical addition. Auxiliary ingredients, or difficult marketing of powder products, no corresponding market, etc.

In short, the traditional technology lacks a solution for the effective and reasonable follow-up utilization of the crushed metal powder, and still encounters a series of complex technical and social problems, and these problems are far from being on the agenda, so the recycling of waste circuit boards The purpose has not been achieved, so that so far, waste circuit board processing is far from being a profitable and mature industry in business and society

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