Leaching of manganiferous ores by glucose in a sulfuric acid solution: Kinetic modeling and related statistical analysis

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. Co nsidering 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 nonlin ear regression analysis was performed in order to estimate the modeling par ameters, and their related statistical analysis was carried out as well. Th e 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 ex perimental data and the theoretical prevision, confirming the possible appl ication of the estimated kinetic parameters in a wide range of ore content.