Leaching of manganese ores using corncob as reductant in H2SO4 solution
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Materials Research Laboratory, Department of Physics, University of Peshawar, Pakistan, Post code 25120 Pakistan
 
 
Publication date: 2016-01-01
 
 
Corresponding author
Sajjad Ali   

Materials Research Laboratory, Department of Physics, University of Peshawar, MRL, Department of physics, university of peshawar, 25120 Peshawar, Pakistan
 
 
Physicochem. Probl. Miner. Process. 2016;52(1):56-65
 
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ABSTRACT
In this study, corncob was used as reductant for sulfuric acid leaching of manganese ore from Daweezi, Upper Mohmand Agency, Pakistan. X-ray diffraction of representative powdered samples revealed the presence of manganese silicate MnSiO(SiO4), calcite (CaCO3), and -quartz (SiO2). X-ray diffraction and energy dispersive spectroscopy analyses indicated that the examined manganese ore was siliceous in nature. Three process parameters were investigated in the present study including the particle size of the ore, leaching temperature, and amount of corncob. Manganese extraction of 92.48 wt% was achieved for a leaching time of 60 min at 90 oC using 1.9 mol/dm3 H2SO4 concentration and 4 g of corncob. The present results demonstrated that corncob is a low cost, renewable, and non-hazardous reducing agent for manganese leaching under mild acid conditions in comparison to the other available reagents.
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ISSN:1643-1049
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