过饱和铝酸钠溶液结构性质与分解机理研究现状

过饱和铝酸钠溶液分解是氧化铝生产过机理的研究是氧化铝生产过程的重要基础问题.本文对过饱和铝酸钠溶液中铝酸根离子存在的基本形态,浓度、苛性比和阳离子对铝酸钠溶液结构性质的影响,溶液中多种铝酸根离子平衡与转化规律,以及铝酸钠溶液分解机理研究的现状进行了总结和评述;分析了现有铝酸钠溶液结构性质与分解机理研究的不足;围绕强化氧化铝生产中铝酸钠溶液分解过程的目的,提出了铝酸钠溶液结构性质与分解机理研究的重点.

Development and Prospect in the Fundamental Research on the Decomposition of Supersaturated Sodium Aluminate Solution

Decomposition of supersaturated sodium aluminate solution is one of the most important procedures in the production of alumina. In this paper, the current research status on structural characteristics and decomposition mechanism of supersaturated sodium aluminate solution are reviewed. The basic structure of aluminate ions is summarized and the influence of concentration, caustic ratio and alkali metals on the structure is analyzed.The exploration about growth units of aluminum hydroxide precipitating from caustic aluminate solution as well as the decomposition mechanism are all remarked. Considering the enhancement of alumina production process, key research topics about the structural characters and decomposition mechanism of supersaturated sodium aluminate solution are put forward.