Leaching and Kinetic Modeling of Malaysian Low Grade Manganese Ore in Sulfuric Acids
The leaching process of Malaysian low grade manganese ore (LGMO) using bamboo sawdust (BSD) as reducing agent in acidic medium (H2SO4) and the dissolution kinetics of this ore was investigated. Acid concentration, reaction temperature, and BSD loading were chosen as experimental parameters through application of response surface methodology (RSM). For analysis of the kinetic data in this study, the SCM with surface chemical reaction and diffusion through product layer, the mixed control modelled and also new variant SCM were evaluated. The reaction kinetics of this leaching process was determined, and it is observed that it fits the model of 1-23X-(1-X)23=kt with activation energy of 69.3kJ/mol. The reaction rate for LGMO leaching using BSD was found to be diffusion through product layer.
S. Ismail et al., "Leaching and Kinetic Modeling of Malaysian Low Grade Manganese Ore in Sulfuric Acids", Advanced Materials Research, Vol. 1133, pp. 629-633, 2016