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Article

Evaluation of Recyclability of a WEEE Slag by Means of Integrative X-Ray Computer Tomography and SEM-Based Image Analysis

1
Institute of Mechanical Process Engineering and Mineral Processing, TU Bergakademie Freiberg, Agricolastraße 1, 09599 Freiberg, Germany
2
Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Straße 40, 09599 Freiberg, Germany
3
Institute of Process Metallurgy and Metal Recycling, RWTH Aachen University, Intzestraße 3, 52056 Aachen, Germany
4
SMS group GmbH, Ivo-Beucker-Straße 43, 40237 Düsseldorf, Germany
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(4), 309; https://doi.org/10.3390/min10040309
Received: 10 February 2020 / Revised: 12 March 2020 / Accepted: 26 March 2020 / Published: 30 March 2020
Waste of electrical and electronic equipment (WEEE) is one of the fastest growing waste streams globally. Therefore, recycling of the valuable metals of this stream plays a vital role in establishing a circular economy. The smelting process of WEEE leads to significant amounts of valuable metals and rare earth elements (REEs) trapped in the slag phase. The effective manipulation of this phase transfer process necessitates detailed understanding and effective treatment to minimize these contents. Furthermore, an adequate process control to bring these metal contents into structures that make recycling economically applicable is required. Within the present study, a typical slag from a WEEE melting process is analyzed in detail. Therefore, the material is investigated with the help of X-ray computed tomography (XCT) and scanning electron microscopy (SEM)-based mineralogical analysis (MLA) to understand the typical structures and its implications for recycling. The influencing factors are discussed, and further processing opportunities are illustrated. View Full-Text
Keywords: waste of electrical and electronic equipment; X-ray computed tomography; mineral liberation analysis waste of electrical and electronic equipment; X-ray computed tomography; mineral liberation analysis
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MDPI and ACS Style

Buchmann, M.; Borowski, N.; Leißner, T.; Heinig, T.; Reuter, M.A.; Friedrich, B.; Peuker, U.A. Evaluation of Recyclability of a WEEE Slag by Means of Integrative X-Ray Computer Tomography and SEM-Based Image Analysis. Minerals 2020, 10, 309. https://doi.org/10.3390/min10040309

AMA Style

Buchmann M, Borowski N, Leißner T, Heinig T, Reuter MA, Friedrich B, Peuker UA. Evaluation of Recyclability of a WEEE Slag by Means of Integrative X-Ray Computer Tomography and SEM-Based Image Analysis. Minerals. 2020; 10(4):309. https://doi.org/10.3390/min10040309

Chicago/Turabian Style

Buchmann, Markus, Nikolaus Borowski, Thomas Leißner, Thomas Heinig, Markus A. Reuter, Bernd Friedrich, and Urs A. Peuker 2020. "Evaluation of Recyclability of a WEEE Slag by Means of Integrative X-Ray Computer Tomography and SEM-Based Image Analysis" Minerals 10, no. 4: 309. https://doi.org/10.3390/min10040309

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