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Open AccessFeature PaperArticle

Selective Milling and Elemental Assay of Printed Circuit Board Particles for Their Recycling Purpose

1
Ecole Nationale Supérieure de Géologie, GeoRessources UMR 7359 CNRS, University of Lorraine, 2 Rue du Doyen Marcel Roubault, BP 10162, 54505 Vandoeuvre-lès-Nancy, France
2
Waste Science & Technology, Luleå University of Technology, SE 97187 Luleå, Sweden
*
Author to whom correspondence should be addressed.
Metals 2019, 9(8), 899; https://doi.org/10.3390/met9080899
Received: 18 July 2019 / Revised: 2 August 2019 / Accepted: 12 August 2019 / Published: 16 August 2019
(This article belongs to the Special Issue Advances in Characterization of Heterogeneous Metals/Alloys)
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Abstract

Selective/preferential milling of printed circuit board (PCB) particles followed by non-destructive characterization of the mill products was performed in order to understand the effects of different feed masses into a hammer mill and different milling time on the metal recovery and enrichment ratio. Those are important variables affecting and determining the process performance and capacity. The milling tests and elemental assay characterization were conducted by using a hammer mill and a portable X-ray fluorescence analysis (XRF), respectively. The results showed the preferential metal concentration/enrichment was achieved for several elements and their degree was varied depending on the parameters. Using the experimental data, predictive models of metal recovery were developed and the global trend of metal recoveries was observed under different mill feed and milling time and discussed. View Full-Text
Keywords: metal recovery; concentration; enrichment; modeling; heterogeneity; non-destructive characterization metal recovery; concentration; enrichment; modeling; heterogeneity; non-destructive characterization
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Otsuki, A.; Pereira Gonçalves, P.; Leroy, E. Selective Milling and Elemental Assay of Printed Circuit Board Particles for Their Recycling Purpose. Metals 2019, 9, 899.

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