Upgrading mixed polyolefin waste with magnetic density separation |
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| Authors: | EJ Bakker PC Rem N Fraunholcz |
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| Institution: | 1. Resource Engineering, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands;2. Recycling Avenue vof, Rotterdamseweg 145, 2628 AL Delft, The Netherlands;1. Aristotle University of Thessaloniki, Greece;2. University of Thessaly, Greece;3. National Technical University of Athens, Greece;1. DICEA-Sapienza University of Rome, via Eudossiana 18, 00184 Rome, Italy;2. DICMA-Sapienza University of Rome, via Eudossiana 18, 00184 Rome, Italy;1. c/Arzobispo Guisasola 16, 4-I, 33009 Oviedo, Spain;2. School of Mines, Energy and Materials, University of Oviedo, 33004 Oviedo, Spain;3. JMC Engineering (UK) Ltd., P.O. Box 36, Alfreton, Derbyshire DE55 1NG, UK;1. Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, HaMaccabim Road 68, P.O.B 15159, Rishon LeZion 7528809, Israel;2. Defence Research and Development Canada (DRDC) – Valcartier, 2459 de la Bravoure, Québec, QC G3J 1X5, Canada;3. Department of Bioresource Engineering, McGill University, Macdonald Campus 21, 111 Lakeshore Road, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada |
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| Abstract: | Polyolefin fractions are often end fractions resulting from the recycling of end-of-life consumer products. Polypropylene (PP) and polyethylene (PE) are present in such fractions as a mixture. For instance, the ratio of PP and PE in car scrap is 70:30 on average. However, the grade of the PP and PE should typically be better than 97% to be reused again as a high quality product. Density separation of the different polyolefins can be a solution. A promising separation technique is the inverse magnetic density separator (IMDS). This paper discusses the potential of shredder residue, one of the possible polyolefin’s waste stream sources for the IMDS, in detail. Experiments with the separation of polyolefins with an IMDS prototype show both high grade and high recovery. The paper concludes with the economic opportunities of the IMDS in the recycling of polyolefins. |
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