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Main Title: Assessment of element-specific recycling efficiency in WEEE pre-processing
Author(s): Ueberschaar, Maximilian
Geiping, Julia
Zamzow, Malte
Flamme, Sabine
Rotter, Vera Susanne
Type: Article
Language Code: en
Is Part Of: 10.14279/depositonce-6156
Abstract: Pre-processing is a crucial step to ensure the efficiency of subsequent processes and the quality of recyclates. The efficiency of pre-processing can be affected by high losses to undesignated output fractions. Standard batch tests usually provide mass balances and are a good proxy for bulk materials balances (iron/steel, aluminum, plastics). This article aims at harmonizing methodologies and recommends a strategy for further study in pre-processing on a plant scale. We have developed an “extended batch test” method, which should help to • describe the fates of materials and elements, • assess the quality of output fractions, • identify access points for critical metals and other valuable elements to enable their recovery. A methodical approach was compiled with common material flow analysis methods and an extended set of methods, which improve the reliability via the assessment of uncertainties. This applies to systematic effects and random effects. This extended batch test was performed with a 40 Mg Waste Electrical & Electronic Equipment (WEEE) batch to trace the flows of industrial base metals, precious metals and critical metals in a WEEE pre-processing plant. Results show that one-third of the input was separated and sorted manually, while the remaining material was subsequently crushed and automatically sorted. Copper and precious metals are distributed to various output fractions but are most concentrated in the sorting residues. Critical metals like cobalt and rare earth elements are mainly concentrated in the manually sorted materials but also appear in the ferrous metals scrap and the shredder light fraction.
Issue Date: 2017
Date Available: 27-Oct-2017
DDC Class: 629 Andere Fachrichtungen der Ingenieurwissenschaften
Subject(s): material flow analysis
critical metals
precious metals
batch test
systematic effects
random effects
Journal Title: Resources, Conservation, and Recycling
Publisher: Elsevier
Publisher Place: Amsterdam
Volume: 124
Publisher DOI: 10.1016/j.resconrec.2017.04.006
Page Start: 25
Page End: 41
ISSN: 0921-3449
Appears in Collections:FG Kreislaufwirtschaft und Recyclingtechnologie » Publications

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