中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 2 April 2004 |
from sodium aluminate solution processed under ultrasound①
（College of Chemistry and Chemical Engineering, Central South University,
Changsha 410083, China）
Abstract:The secondary nucleation during gibbsite precipitation with seeds from sodium aluminate solution processed by ultrasound was examined by particle size distribution(PSD) analyses. Experiments indicate that at low temperature(<65 ℃) and with low frequency ultrasound, the precipitation efficiency and also the secondary nucleation can be improved. Solution processed by low frequency ultrasound has more nuclei than common liquor does at low temperature. At 55℃,
precipitation efficiency can be improved by 5.31%, and the effect promoted by low frequency ultrasound decreases with the increase of temperature.
Key words: sodium aluminate solution; ultrasound; particle size distribution; secondary nucleation
