ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Characterization and leaching of mechanically activated zinc residue

M. Deniz Turan

Department of Metallurgical and Materials Engineering, Fırat University, Elazig, Turkey

E-mail: mdturan@firat.edu.tr

Received: 2 July 2020  Accepted: 23 December 2020

Abstract:

Zinc extraction from zinc-containing residual (ZCR) was examined with the leach of sulfuric acid of original materials and the materials milled in two different mill systems. For this purpose, vibrating ball mill (VBM) and ring mill (RM) were used. In chemical analysis of ZCR, it was determined that it contains a significant amount of zinc, lead, iron and silver and consisted of mostly CaSO₄.2H₂O, PbO, SiO₂, Fe₂O₃, ZnFe₂O₄, Al₂FeO₄ and PbSO₄ mineral phases. It was determined in XRD analysis of samples milled at both mills that peak intensity dramatically decreased when compared to original sample.

According to comparative characterization analyses of the milled samples, it was determined that through the increasing grinding time, the particles became agglomerated and an increase in grain size occurred. This situation was also supported by N₂-BET and SEM analyses.

While zinc extraction value of the sample milled for 1 min, which was obtained at 0.5 M H₂SO₄ at leach temperature of 25 °C, at the solid–liquid rate of 100:1 and during the leach time of 30 min, was 90% and 60% for, respectively, VBM and RM, zinc of 54% was determined to be extracted in the leach of the original sample, under the same conditions.

Keywords: Zinc; Mechanical activation; Milling; Leaching; Hydrometallurgy

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01491-w

Chemical Papers 75 (6) 2881–2890 (2021)