TY  - JOUR
AU  - Khosravi, Rasoul 
AU  - Fatahi, Rasoul 
AU  - Siavoshi, Hossein 
AU  - Molaei, Fatemeh 
PY  - 2020
TI  - Recovery of Manganese from Zinc Smelter Slag
JF  - American Journal of Engineering and Applied Sciences
VL  - 13
IS  - 4
DO  - 10.3844/ajeassp.2020.748.758
UR  - https://thescipub.com/abstract/ajeassp.2020.748.758
AB  - 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.