Kinetics of Sulfuric Acid Leaching of Boron Slurry
The results of a leaching kinetics study of boron slurry with sulfuric acid were presented. Effect of ore particle size, reaction temperature, and acid concentration on magnesium dissolution rate were determined. The results shown that leaching of about 64.61% of magnesium was achieved using (-200+ 250) mesh ore particle size at a reaction temperature of 60°C for reaction time 100 min with 25% sulfuric acid concentration. Leaching kinetics indicated that diffusion through the product layer was the rate controlling process during the reaction. The reaction activation energy was determined to be about 3.35 kcal/mol, which was characteristic for a diffusion– controlled process.
Helen Zhang and David Jin
F. Gao et al., "Kinetics of Sulfuric Acid Leaching of Boron Slurry", Advanced Materials Research, Vol. 366, pp. 370-373, 2012