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48,80 €
ISBN 978-3-8440-7170-2
Softcover
162 pages
221 g
21 x 14,8 cm
English
Thesis
January 2020
Fabian Diaz
Process concept based on pyrolysis for integration of Shredder light fractions (SLF) in the Recycling of Waste Electrical and Electronic Equipment (WEEE)
Energy recovery is probably the most common use for SLF due to its considerable amount of intrinsic heat. Nevertheless, recovery of valuable metals cannot be done properly by these methods. It should be noticed that this material, if coming from the electrical and electronic industry, contains valuable metals in considerable concentrations like copper, tin, lead, zinc, silver, gold, and others. Despite the many attempts trying to find the correct solution for SLF, it is clear that the only feasible way to recover Cu-base metals, is by incorporating the material inside the Copper production chain. In addition to incineration, pyrolysis of SRs have been studied in the past. Nevertheless, direct use of such an organic material brings considerable challenges for most industrial smelters due to its heterogeneity, high heat value, low density, halogens and high off gas formation. This study has focused on pyrolysis of SLF and has tried to build up the link between pre-processing and end-processing in metallurgical applications.

The findings in this study has given a good perspective regarding the material after pyrolysis, which could be used as reducing agent in any process where reduction of copper containing slags is required. This work covers from preliminary analysis in pyrolysis of WEEE, upscaling pyrolysis of SLF from lab to pilot, evaluation of pyrolysed SLF as an energy source in the copper industry as well as evaluation of pyrolysed SLF as a possible substitute for fossil reducing agents. The last one has been studied from mini-scale in grams to semi industrial application in a Top Blown Rotary Converter (TBRC), where the material has shown its biggest potential if injected with high speed inside molten slag and under proper reducing conditions. Results have indicated that this process is viable due to its good turbulence, rapid reaction and good reduction efficiencies.
Keywords: Shredder light fractions; Waste Electrical and Electronic Equipment; WEEE Recycling; Pyrolysis; Pyrolyse cokes; Reduction Agent; Thermal treatment; Pyrometallurgy
Schriftenreihe des IME
Edited by Prof. Dr.-Ing. Bernd Friedrich, Aachen
Volume 60
Available online documents for this title
DOI 10.2370/9783844071702
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