【摘要】 对硫酸铵焙烧粉煤灰的熟料溶出过程进行了动力学研究,根据不同温度、不同搅拌强度、不同液固比中Al2O3的溶出率和反应时间的关系,计算该反应的表观活化能为19.93 kJ/mol,熟料的溶出过程受通过固体产物层的内扩散控制,动力学方程为:1+2(1-x)-3(1-x)2/3=4.52exp{-19929/RT}·t。在液固比8:1,溶出温度为90℃,搅拌强度为300 r/min,溶出时间70 min的条件下,Al2O3的溶出率可达84%。更多还原

【Abstract】 The dissolving kinetics of the clinker obtained from roasting process of fly ash and ammonium sulfate is studied. According to the changes of Al2 O3 dissolving ratio with the changes of time at different dissolving temperature, stirring speed and water-to-ore, the apparent activation energy for the dissolving reaction is 19.93 kJ/mol. The clinker dissolving process is controlled by the internal diffusion on the solid product layer and the kinetics equation of the dissolving process was obtained as: 1+2(1-x)-3(1-x)2/3=4.52 exp{-19929/RT}·t. The dissolving ratio of Al2 O3 reaches 84% under the optimum conditions including mass ratio of water-to-ore of 8:1, temperature of 90℃, stirring speed of 300 r/min and stirring time of 70 min.更多还原