The effect of mechanical–physical pretreatment on hydrometallurgical extraction of copper and tin in residue from printed circuit boards from used consumer equipment.pdf

Minerals Engineering 65 (2014) 163–171 Contents lists available at ScienceDirect Minerals Engineering journal homepage: www.else /loc ate/mineng The effect of mechanical–physical pretreatment on hydrometallurgical extraction of copper and tin in residue from printed circuit boards from used consumer equipment Tomas Havlik a, Dusan Orac a,⇑, Mattias Berwanger b, Anja Maul b a Technical University of Kosice, Faculty of Metallurgy, Department of Non-Ferrous Metals and Waste Treatment, Letna 9, 042 00 Kosice, Slovakia b RWTH Aachen University, Department of Processing and Recycling, Wüllnerstr. 2, 52062 Aachen, Germany a r t i c l e i n f o a b s t r a c t Article history: This work is focused on studying mechanical–physical pretreatment of printed circuit boards from used Received 27 December 2013 consumer equipment followed by extraction of copper and tin from residue fractions by leaching in Accepted 8 June 2014 hydrochloric acid solutions. Mechanical–physical pretreatment was realized in three different proce- Available online 5 July 2014 dures. Key processes were electro-dynamic separation, cross-flow air sifter separation and air table separation, respectively. Leaching experiments were carried out in 1 M and 2 M HCl at 80 C. The results Keywords: show that cross-flow air sifting leads to the highest accumulation of non-ferrous metals in a residue Recycling