硫酸铵焙烧粉煤灰的熟料溶出动力学研究  

Dissolving Kinetics of the Clinker from Fly Ash Roasted by Ammonium Sulfate

作　　者：隋丽丽[1] 付云鹏[2] 王莹[1] 翟玉春[3] Sui Lili;Fu Yunpeng;Wang Ying;Zhai Yuchun(Shenyang Medical College , Shenyang, Liaoning, China;Liaoning University , Shenyang, Liaoning,China;Northeastern University , Shenyang, Liaoning, China)

机构地区：[1]沈阳医学院,辽宁沈阳110034 [2]辽宁大学,辽宁沈阳110000 [3]东北大学,辽宁沈阳110819

出　　处：《矿产综合利用》2019年第1期147-151,共5页Multipurpose Utilization of Mineral Resources

基　　金：沈阳医学院科技发展基金(20186055);国家自然科学基金(61372195);辽宁省教育厅科学研究一般项目(L2012374)

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%。The dissolving kinetics of the clinker obtained from roasting process of fly ash and ammonium sulfate is studied. According to the changes of Al2O3 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=4.52exp {-19929/RT}·t. The dissolving ratio of Al2O3 reaches 84% under the optimum conditions including mass ratio of water-to-ore of 8:1, temperature of 90℃, stirring speed of 300r/min and stirring time of 70 min.

关 键 词：粉煤灰 硫酸铵 氧化铝 熟料溶出 动力学 

分 类 号：TD134[矿业工程—矿山地质测量]