Selective Hydrochloric Acid Leaching of Zinc, Lead and Silver from Mechanically Activated Zinc Plant Residue
Deniz Turan M. Assemi S. Nadirov R.K. Karamyrzayev G.A. Baigenzhenov O. Toro N.
October 2022Pleiades journals
Russian Journal of Non-Ferrous Metals
2022#63Issue 5490 - 499 pp.
Abstract: A solid waste from zinc production, zinc plant residue (ZPR) is a valuable resource for the recovery of zinc (Zn), lead (Pb), and silver (Ag). However, the ferritic structure of ZPR makes it difficult to leach these metals. Here, in order to increase the reactivity of the ZPR, mechanical activation using a high-energy ball mill was used. The sample mechanically activated for 15 min was subjected to two-stage leaching with the hydrochloric acid (HCl) solution. At the 1st stage, 74% of Zn was recovered from mechanically activated ZPR sample into the solution under the following conditions: 1 M HCl, 120 min leaching duration, liquid-to-solid ratio (L : S) of 4, the temperature of 25°C, and a rotation speed of 600 rpm. At the 2nd stage, 56% of Pb and 53% of Ag were recovered from the leaching residue, under the following optimized conditions: 8 M HCl, 120 min leaching duration, liquid-to-solid ratio (L : S) of 20, the temperature of 25°C, and a rotation speed of 600 rpm. Сonceptual flow-diagram of the zinc, lead and silver selective recovery from ZPR is proposed herein.
hydrochloric acid , mechanical activation , selective leaching , zinc plant residue
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Department of Metallurgical and Materials Engineering, Fırat University, Elazığ, 23119, Turkey
Faculty of Engineering and Architecture, Universidad Arturo Prat, Antofagasta, 1244260, Chile
Department of Metallurgical Engineering, University of Utah, Salt Lake City, UT, United States
Al-Farabi Kazakh National University, Almaty, 050038, Kazakhstan
Department of Metallurgical Sciences, Satbayev University, Almaty, 050013, Kazakhstan
Department of Metallurgical and Materials Engineering
Faculty of Engineering and Architecture
Department of Metallurgical Engineering
Al-Farabi Kazakh National University
Department of Metallurgical Sciences
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