硫酸铵焙烧粉煤灰反应动力学研究  

Reaction kinetics of roasting fly ash by ammonium sulfate

作　　者：隋丽丽[1] 翟玉春[2] 尚志航[1] 任红[1] 

机构地区：[1]沈阳医学院化学系,辽宁沈阳110034 [2]东北大学材料冶金学院,辽宁沈阳110819

出　　处：《轻金属》2016年第4期16-19,共4页Light Metals

基　　金：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：探索了硫酸铵焙烧粉煤灰制备氧化铝的工艺条件,为强化焙烧过程,对硫酸铵焙烧粉煤灰的反应动力学规律进行了系统的研究,确定了焙烧温度、物料配比对铝提取率的影响,结果指出:硫酸铵焙烧粉煤灰的反应受固膜扩散控制,反应活化能为10.83 kJ·mol^(-1),并给出了该焙烧反应的动力学方程。Process conditions of preparation alumina by roasting fly ash with ammonium sulfate were researched. In order to strengthen the roasting process, the roasting kinetics of fly ash and ammonium sulfate was systematically studied, and the effects of roasting temperature and material ratio on the aluminum reaction rate were investigated. The results showed that the control step of the roasting reaction was solid layer diffusion control. The activation energy was calculated to be 10.83kJ/mol and the general kinetic rate equation was developed.

关 键 词：硫酸铵 粉煤灰 焙烧 动力学 

分 类 号：TQ133.1[化学工程—无机化工] O643.12[理学—物理化学]