naa a22 4500 510770622 CHVBK 20180411083212.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11837-013-0778-x doi (NATIONALLICENCE)springer-10.1007/s11837-013-0778-x Thermal Recycling of Waelz Oxide Using Concentrated Solar Energy [Elektronische Daten] [N. Tzouganatos, R. Matter, C. Wieckert, J. Antrekowitsch, M. Gamroth, A. Steinfeld] The dominating Zn recycling process is the so-called Waelz process. Waelz oxide (WOX), containing 55-65% Zn in oxidic form, is mainly derived from electric arc furnace dust produced during recycling of galvanized steel. After its wash treatment to separate off chlorides, WOX is used as feedstock along with ZnS concentrates for the electrolytic production of high-grade zinc. Novel and environmentally cleaner routes for the purification of WOX and the production of Zn are investigated using concentrated solar energy as the source of high-temperature process heat. The solar-driven clinkering of WOX and its carbothermal reduction were experimentally demonstrated using a 10kWth packed-bed solar reactor. Solar clinkering at above 1265°C reduced the amount of impurities below 0.1wt.%. Solar carbothermal reduction using biocharcoal as reducing agent in the 1170-1320°C range yielded 90wt.% Zn. The Minerals, Metals & Materials Society, 2013 Tzouganatos N. Solar Technology Laboratory, Paul Scherrer Institute, 5232, Villigen, Switzerland aut Matter R. Department of Mechanical and Process Engineering, ETH Zurich, 8092, Zurich, Switzerland aut Wieckert C. Solar Technology Laboratory, Paul Scherrer Institute, 5232, Villigen, Switzerland aut Antrekowitsch J. Department of Metallurgy, Montan University, 8700, Leoben, Austria aut Gamroth M. Befesa Steel Services GmbH, 47269, Duisburg, Germany aut Steinfeld A. Solar Technology Laboratory, Paul Scherrer Institute, 5232, Villigen, Switzerland aut JOM Springer US; http://www.springer-ny.com 65/12(2013-12-01), 1733-1743 1047-4838 65:12<1733 2013 65 11837 https://doi.org/10.1007/s11837-013-0778-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0778-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tzouganatos N. Solar Technology Laboratory, Paul Scherrer Institute, 5232, Villigen, Switzerland aut NATIONALLICENCE 700 1- Matter R. Department of Mechanical and Process Engineering, ETH Zurich, 8092, Zurich, Switzerland aut NATIONALLICENCE 700 1- Wieckert C. Solar Technology Laboratory, Paul Scherrer Institute, 5232, Villigen, Switzerland aut NATIONALLICENCE 700 1- Antrekowitsch J. Department of Metallurgy, Montan University, 8700, Leoben, Austria aut NATIONALLICENCE 700 1- Gamroth M. Befesa Steel Services GmbH, 47269, Duisburg, Germany aut NATIONALLICENCE 700 1- Steinfeld A. Solar Technology Laboratory, Paul Scherrer Institute, 5232, Villigen, Switzerland aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/12(2013-12-01), 1733-1743 1047-4838 65:12<1733 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer