Initial Investigation into the Leaching of Manganese from Nodules at Room Temperature with the Use of Sulfuric Acid and the Addition of Foundry Slag-Part I
Date Issued
2018
Author(s)
Toro, Norman
Herrera, Nelson
Castillo, Jonathan
Torres, Cynthia M.
Sepulveda, Rossana
DOI
http://dx.doi.org/10.3390/min8120565
Abstract
In this study, the surface optimization methodology was used to assess the effect of three independent variables-time, particle size and sulfuric acid concentration-on Mn extraction from marine nodules during leaching with H2SO4 in the presence of foundry slag. The effect of the MnO2/Fe ratio and particle size (MnO2) was also investigated. The maximum Mn extraction rate was obtained when a MnO2 to Fe molar ratio of 0.5, 1 M of H2SO4, -320 + 400 Tyler mesh (-47 + 38 mu m) nodule particle size and a leaching time of 30 min were used.