Nucleation during gibbsites precipitation with seeds from sodium aluminate solution processed under ultrasound^①

来源期刊：中国有色金属学报(英文版)2004年第2期

论文作者：陈国辉 陈启元 尹周澜 张斌

文章页码：400 - 404

Key words：sodium aluminate solution; ultrasound; particle size distribution; secondary nucleation

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.