Abstract
E-waste recovery caused serious pollution in China. Environment-friendly technologies are the pressing demands for Chinese to dispose e-waste. Waste printed circuit board, which is a typical e-waste, needs to be properly treated. Many works related to dispose the basal boards. Littler information was about the dispose technology of electronic components. In this study, due to contain different metals, electronic components were classified as Ti-enriched components (diodes: 156.31 mg/kg; audions: 205.66 mg/kg) and Sn-enriched components (CD capacitances: 172.35 mg/kg; electrical resistances: 204.67 mg/kg; CBB capacitances: 523.94 mg/kg). Pneumatic separation was proposed to separate Ti-enriched components and Sn-enriched components. Movement behavior models of electronic components in pneumatic separation were constructed. Then, optimized parameters of airflow velocity (6.498 m/s) and position (0.865 m) of separation plate of pneumatic separator were obtained. Separation rates of diode, audion, CD capacitances, electrical resistances, and CBB capacitances reached 96.7 wt %, 93.3 wt %, 97.3 wt %, 96.8 wt %, and 93.9 wt % respectively. This paper provided an environment-friendly and effective technology for separating Ti-enriched components and Sn-enriched components of waste printed circuit boards.
Published Version
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