STUDY ON THE APPLICATION AND MECHANISM OF CATIONIC SURFACTANT ON THE PRECIPITATION OF SODIUM ALUMINATE LIQUOR

摘要

More and more additives have been used in the process of seeded precipitation of sodium aluminate liquor, such as Nalco CGM, Alclar CM 5159 etc. They increased the particle size of gibbsite but could not enhance the precipitation from sodium aluminate liquor. In order to make up the loss some cationic surfactant was studied in this paper. As a result it was found that the application of cationic surfactant in precipitation of sodium aluminate liquor could not only increase the precipitation rate but improve the quality of hydroxide alumina. The optimum quantity of surfactant added was determined; the mechanism of enhancing the seeded precipitation process by adding cationic surfactant is also discussed in detail.