几种添加剂提高拜耳法种分分解速率的效果  

Effects of Mixed Additives on Al(OH)_3 Precipitation with Seeds in Bayer Process

作　　者：张斌[1] 陈启元[2] 周科朝[3] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082 [2]中南大学化学化工院,长沙410083 [3]中南大学粉末冶金研究院,长沙410083

出　　处：《有色金属》2007年第4期91-94,共4页Nonferrous Metals

基　　金：国家重大基础研究发展规划项目(G19990649);国家自然科学基金资助项目(59874031)

摘　　要：研究几种混合添加剂提高拜耳法铝酸钠溶液种分分解率的效果。结果表明,阴离子型聚丙烯酰胺对种分分解影响不大,非离子型聚丙烯酰胺提高种分分解速率,最高可达2.08%,阳离子聚丙烯酰胺作为添加剂效果最好,最高可提高种分分解速率达到4.06%,并且分子量大的效果更好。光电子能谱测试表明,有机混合添加剂是以物理吸附的方式作用于氢氧化铝晶种表面。The effects of several mixed additives on decomposition rate of Al（OH）3 precipitated from caustic aluminate solutions with seeds promoted are investigated. The results show that the decomposition rate of Al（OH）3 is negatively influenced by the mixed additives of the anionic polyacry lamide and sodium polyacrylate. The decomposition rate can be increased by 2.08 % while the mixed additives of non-ionic polyacry lamide and sodium polyacrylate are adopted. The effect of the mixed additives of positive ion polyacry lamide and sodium polyacrylate is the best, the decomposition rate is increased by 4.06 %, and the larger of polyacry lamide molecular, the better the effect on the decomposition rate.

关 键 词：冶金技术 铝 复合添加剂 种分 分解速率 

分 类 号：TF821[冶金工程—有色金属冶金] TF111.34