Phenomena in late period of seeded precipitation of sodium aluminate solution  

作　　者：李小斌 冯港涛 周秋生 彭志宏 刘桂华 

机构地区：[1]School of Metallurgical Science and Engineering, C entral South University, Changsha 410083, China

出　　处：《中国有色金属学会会刊：英文版》2006年第4期947-950,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(2005CB623702) supported by the National Basic Research Program of China

摘　　要：Aiming at seeded precipitation of aluminate solution with high caustic ratio(αk>2.4), corresponding to the late period of seeded precipitation, the influence of different types of seed on precipitation ratio was explained with respect to solution structure in the interface of seed and the evolution of Al(OH)3 growth units in this layer. The effects of solid content and seed size on agglomeration were determined by calculating the particle number of product. The results imply that the solution structure in the interface of seed imposes a notable significance on the process in the late period of seeded precipitation. Agglomeration still exists in this period. However, the agglomeration bodies break in the case of prolonging precipitation due to the mechanical effect, which results in the increase of particle number.Aiming at seeded precipitation of aluminate solution with high caustic ratio（ak〉2.4）, corresponding to the late period of seeded precipitation, the influence of different types of seed on precipitation ratio was explained with respect to solution structure in the interface of seed and the evolution of Al（OH）3 growth units in this layer. The effects of solid content and seed size on agglomeration were determined by calculating the particle number of product. The results imply that the solution structure in the interface of seed imposes a notable significance on the process in the late period of seeded precipitation. Agglomeration still exists in this period. However, the agglomeration bodies break in the case of prolonging precipitation due to the mechanical effect, which results in the increase of particle number.

关 键 词：铝酸钠溶液 晶种析出 消耗 结构 氧化铝 

分 类 号：TF821[冶金工程—有色金属冶金]