Waste printed circuit board wet separation technological process

Abstract

The invention discloses a waste printed circuit board wet separation technological process which comprises the following steps that firstly, waste printed circuit boards are crushed, and screening is carried out to obtain oversize products and undersize products; the oversize products enter a TBS sorting machine, the undersize products enter a hydrocyclone for secondary classification, and underflow and overflow of the hydrocyclone enter a shaking table and a flotation system respectively; the TBS sorting machine, the table concentrator and the flotation all comprise the steps of roughing, fine selection and scavenging; roughing concentrate is subjected to fine selection, and roughing tailings are subjected to scavenging, wherein fine selection concentrate is metal components, fine selection tailings and scavenging concentrate are jointly returned to roughing for re-selection, and scavenging tailings are non-metal components; and the metal components obtained through the TBS sorting machine, the table concentrator and the flotation are combined, regrinding deep dissociation is conducted, then secondary flotation is conducted, high-grade final concentrate is obtained, and the tailings obtained in the whole technological process are combined into final tailings. According to the process, a re-selection and flotation combined method is adopted, efficient separation of the metal components and the non-metal components in the waste circuit boards is achieved, and the separation efficiency is improved.

Description

technical field [0001] The invention relates to the field of waste printed circuit board treatment, in particular to a waste circuit board wet separation process. Background technique [0002] With the rapid development of electronic information technology and the improvement of residents' purchasing power, the update speed of electronic products has increased, resulting in an increase in the output of electronic waste. Electronic waste has dual attributes of resource and environmental threat. Due to the lack of mature recycling technology, electronic waste has not been effectively disposed of at this stage. [0003] Printed circuit boards are the core components of electronic waste and contain various high-value metal components such as gold, silver, copper, and platinum. Scientific recycling can turn waste into treasure. On the contrary, if it is not treated centrally or treated by landfill or incineration, it will pose a great threat to human health and the ecological en...

AI Technical Summary

Problems solved by technology

Scientific recycling can turn waste into treasure. On the contrary, if it is not treated centrally or landfilled or incinerated, it will pose a great threat to human health and the ecological environment.

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