A novel flowsheet for the recovery of metal values from waste printed circuit boards

A. Das, A. Vidyadhar and S.P. Mehrotra

Resources, Conservation & Recycling, 2009, vol. 53, issue 8, 464-469

Abstract: Recovery of metal values from waste printed circuit boards using physical beneficiation techniques was studied. A novel flowsheet using a combination of wet and dry unit operations was developed to achieve the separation of metals from non-metallic constituents. The wet concentration circuit consisted of flowing film concentration in tabling, flotation of plastics and enhanced gravity separation in multi-gravity separator. The dry purification circuit consisted of electrodynamic and electrostatic separation. Substantial enrichment of the ground powder with good recovery of metals was achieved using the flowsheet. The starting PCB powder, ground to −0.5mm size, had about 23% total metal. Complete liberation of metals from plastics was achieved below 100μm size. Metal values were found to be more abundant in the coarser sizes.

Keywords: Electronic waste; Printed circuit boards; Physical beneficiation; Flowsheet development; Waste recycling (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:53:y:2009:i:8:p:464-469

DOI: 10.1016/j.resconrec.2009.03.008

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