谷氨酸添加剂对铝酸钠溶液种分分解率及产品粒度的影响  

Effects of glutamic acid additives on seeded precipitation of sodium aluminate solution

作　　者：尹周澜[1] 马颖[1] 吕保林[1] 李甲品[1] 陈启元[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《中国有色金属学报》2008年第E01期130-133,共4页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项（20476107）国家重点基础研究发展计划资助项目（2005CB623702）

摘　　要：选用谷氨酸作为种分添加剂，在初始浓度ρ（Na2O）为150g／L，初始苛性比αk0为1．42，温度为75℃，搅拌速度为160r／min，晶种系数Ks为0．25的实验条件下，研究添加剂用量对铝酸钠溶液分解率和产品粒度的影响。结果表明：谷氨酸在一定浓度范围内能提高铝酸钠溶液分解率，低浓度时添加效果最佳；添加浓度为3×10^-3mol／L，反应进行到2h时产品粒度得到细化，其它条件下产品粒度均得到粗化。结果表明：谷氨酸是有效的铝酸钠溶液种分添加剂。Glutamic acid was adopted as additive in seeded precipitation process on the condition of ρ（Na2O） 150 g/L, initial αK 1.42, temperature 75 ℃, agitation speed 160 r/min and Ks 0.25. The effect of dosage on the decomposition ratio of sodium aluminate solutions and particle size distribution（PSD） of gibbsite was investigated. Experimental results indicate that glutamic acid can increase the decomposition ratio of sodium aluminate at lower concentration. The particle size of gibbsite product is reduced when the additive concentration is 3 × 10^-3 mol/L at 2 h. The particle size is enlarged under other conditions. All the results show that glutamic acid is an effective additive for the seeded precipitation of sodium aluminate solution.

关 键 词：谷氨酸 铝酸钠溶液 种分 分解率 粒度分布 

分 类 号：TF111.3[冶金工程—冶金物理化学]