Method and device for cleaning and separating various components and parts and recycling tin from waste circuit boards

Abstract

The invention provides a method and device for cleaning and separating various components and parts and recycling tin from waste circuit boards. The method comprises the following steps of: adding the waste circuit boards into a mixture of tin stripping liquor methylsulfonic acid and SnCl4; and stripping tin through pulsed ultrasonic treatment and vibrating treatment to obtain tin-stripped liquor; and a proportion, in the mixture, of the methylsulfonic acid is 1.0wt.%-20.0wt.%. The method is short in period, is high in efficiency, is short in flow, can realize cleaning and separating of the various components and parts on the waste circuit boards, also realizes efficient recycling of tin, realizes cleaning pre-treatment of the waste circuit boards, does not cause damages on the various components and parts, and can achieve the purpose of reducing emission and increasing income. The device is simple and practical, and can comprehensively obtain good tin stripping effect and good tin extracting effect.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery and utilization of electronic waste resources, and in particular relates to a method and a device for cleanly separating various components from waste circuit boards and recycling tin. technical background [0002] With the rapid development of electronic information technology and people's pursuit of a higher level of material and cultural life, the replacement speed of electronic products has been significantly accelerated, and a large amount of electronic waste has been generated at the same time. The annual growth of global electronic waste is more than 6%, which is three times faster than the growth rate of total waste, and has become the fastest growing waste in the world. [0003] Circuit boards are commonly used components in various electronic devices, so discarded circuit boards are an important part of electronic waste. The main sources of discarded circuit boards in my country ar...

AI Technical Summary

Problems solved by technology

However, they are all based on heating, baking and other methods. Although the waste gas generated during the heating and baking process can be extracted and absorbed, due to the wide variety of circuit boards and different sizes and shapes, this component separation device is not applicable. Strong, the actual operation effect is not good, it is difficult to promote and apply on a large scale

[0010] Generally speaking, the existing cleaning and pretreatment methods and devices for waste circuit boards have problems such as heavy environmental pollution, complicated process, long processing cycle, low efficiency, and easy dispersion and loss of tin in the lengthy treatment and recovery process. The bottleneck that urgently needs to be broken through

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