中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 4 August 2004 |
sodium aluminate solutions with new device①
（1. School of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, China;
2. Guangxi Corporation of China Aluminum Corporation, Pingguo 531400, China）
Abstract:A new device was designed, which can effectively avoid the undesired nucleation and agglomeration of fineparticles on the experimental results during the seaded precipitation of sodium aluminate solution, and moreover, the experimental conditions are nearly kept constant during the experiment. With the new device, it is proven that a good result can be obtained on the kinetics study of the crystal growth in seeded precipitation of sodium aluminate solution.Experiments were carried out with the concentration of Na2O (Nk)170 g/L, the mole ratio of Na2O to Al2O3(αk) all between 1.52 to 2.01, at 65, 70, 75℃, respectively. And the kinetics equation of crystal growth of gibbsite was deduced.
Key words: sodium aluminate solution; seeded precipitation; crystal growth; kinetics
