Leaching Kinetics of Calcined Magnesite in Ammonium Chloride Solutions

In this paper the kinetic of calcinated magnesite dissolution was investigated using ammonium chloride. The relation of calcinated particles dissolution was obtained in the range of 40 to 80 Celsius degrees. By investigating reactant concentration variation with time, the kinetics variable models were determined. This research showed that the reaction satisfies the shrinking-core model for spherical particles and the chemical reaction dominates the reaction rate. Assuming the validity of Arrheniusʹs law, the activation energy for the reaction was obtained 42.26 kJ/ mole