Research Article Open Access

Recovery of Manganese from Zinc Smelter Slag

Rasoul Khosravi1, Rasoul Fatahi2, Hossein Siavoshi3 and Fatemeh Molaei3
  • 1 University of Lorestan, Iran
  • 2 University of Tehran, Iran
  • 3 University of Arizona, United States

Abstract

Using a software-based experiment design, the application of the leaching process for the extraction of manganese from Zinc Plant Slag (ZPS) was investigated. In this study, the effect of different parameters, i.e., H2SO4 concentration, pulp density, agitation rate, temperature and reaction time, was investigated. Response Surface Methodology (RSM) based on the Central Composite Design (CCD) has been implemented to consider the main parameters. A hydrometallurgical route to manganese silicate from spent zinc plant residue has been proposed in this investigation. Based on the investigation, Mn can be extracted from ZPS in sulfuric acid without any oxidant agents. The results showed that the optimum conditions of this study are an H2SO4 concentration of 2 mol/L and a solid/liquid ratio of 0.07 g/mL at 50°C for 150 min and an agitation speed of 1000 rpm. A manganese leaching efficiency higher than 83% is reached under these conditions, with a corresponding 22% iron, 23% lead, 68% zinc and 65% aluminum.

American Journal of Engineering and Applied Sciences
Volume 13 No. 4, 2020, 748-758

DOI: https://doi.org/10.3844/ajeassp.2020.748.758

Submitted On: 14 September 2020 Published On: 1 December 2020

How to Cite: Khosravi, R., Fatahi, R., Siavoshi, H. & Molaei, F. (2020). Recovery of Manganese from Zinc Smelter Slag. American Journal of Engineering and Applied Sciences, 13(4), 748-758. https://doi.org/10.3844/ajeassp.2020.748.758

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Keywords

  • Manganese
  • Zinc
  • Acid Leaching
  • Slag
  • Precipitation