Abstract
A kinetic study of a manganiferous ore leaching in acid media by glucose as the reducing agent is here reported. The shrinking-core model opportunely modified was used to describe the kinetics of the manganese dissolution. Considering the complex network of chemical reaction involved in this process, a variable activation energy term was introduced in the kinetic model to take into consideration the different chemical reaction evolution. A nonlinear regression analysis was performed in order to estimate the modeling parameters, and their related statistical analysis was carried out as well. The proposed model was verified at low and high ore content (10 and 200 g/L, respectively). This comparison showed a quite good agreement between the experimental data and the theoretical prevision, confirming the possible application of the estimated kinetic parameters in a wide range of ore content.
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