铝酸钠溶液晶种分解过程宏观动力学的研究进展

铝酸钠溶液晶种分解是氧化铝生产过程的关键工序之一,其过程动力学的研究是氧化铝生产过程的重要理论基础问题。国内外研究者对铝酸钠溶液晶种分解过程宏观动力学进行了大量的研究,取得了许多一致的结论,但也有不少存在争论。本文对该方面的研究进行了系统的总结。研究表明,铝酸钠溶液晶种分解过程在动力学领域一般遵循二级反应规律;在大量动力学方程除了引入晶种系数或表面积参数以外,并不能反映晶种表面性质的影响;有关研究仍有待深入。

Research and Development of Macroscopic Kinetics in the Process of Seeded Precipitation from Caustic Aluminate Solutions

Seeded precipitation from sodium aluminate liquor is one of the most important processes in the production of alumina.The research on kinetics of seeded precipitation process is one of elementary problems.There are plentiful study results in the field of investigation on the kinetics of seeded precipitation home and overseas.Some of all this conclusions has been accepted,however,some of it brings on controversy.A systematical summary is made of the developments in study on this field.The results show that seeded precipitation follows second order reaction kinetics,most equations which has parameter of seed coefficient or surface area cannot describe the effects of surface properties of seed on itself and further research remains to be done.