Kinetics of Aluminum Extraction Clinker from Fly Ash by Ammonium Sulfate Roasting Activation-Sulfuric Acid Leaching
Aluminum was extracted from fly ash by(NH4)2SO4 roasting activation-sulfuric acid leaching method.The effects of liquid volume/solid mass ratio,reaction temperature,reaction time and sulfuric acid concentration on the leaching rate of aluminum were investigated.The kinetics of acid leaching process of clinker was studied.The results show that the leaching rate of aluminum is 84.64％under the conditions of liquid volume/solid mass ratio of 8/1,reaction temperature of 90 ℃,reaction time of 120 min and sulfuric acid concentration of 20％.The leaching kinetic formula is 1-(1-x)1/3=6.033 93e-22.045RT t,and the reaction activation energy is 22.045 4 kJ/mol.
万方数据
维普
