Optimization of dissolution of ulexite in (NH4)2SO4 solutions

The Taguchi method was used to determine the optimum conditions for the dissolution of ulexite in ammonium sulphate solutions. The ranges of experimental parameters were between 60-88 degrees C for reaction temperature, 0.05-0.15 g.mL(-1) for solid to liquid ratio, 5-20 minutes. for reaction time and (-850+600) - (-90) mu m for particle size. The Optimum conditions for these parameters were found to be 88 degrees C, 0.1 g.mL(-1), -90 mu m and 20 minutes, respectively. Under these conditions. the predicted and experimental dissolution percentages of ulexite in ammonium sulphate solutions were 98.60 and 98.36 per cent, respectively.