种分过程1，2-辛二醇对氢氧化铝粒度及形貌的影响  

Effect of 1,2-Octanediol on the Particle Size and Morphology of Aluminium Hydroxide Precipitated from Seeded Sodium Aluminate Solution

作　　者：张艾民[1] 尹周澜[1] 陈启元[1] 敬叶灵[1] 

机构地区：[1]中南大学亿学化工学院,长沙410083

出　　处：《有色金属（冶炼部分）》2008年第2期10-14,共5页Nonferrous Metals（Extractive Metallurgy)

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

摘　　要：研究了1,2-辛二醇对铝酸钠溶液种分过程的影响。结果表明,1,2-辛二醇对铝酸钠溶液种分过程产生抑制作用。1,2-辛二醇的添加浓度、实验温度以及苛碱浓度等因素对1,2-辛二醇改善铝酸钠溶液种分效果具有显著影响。添加浓度小于1.25 mmol/L时,1,2-辛二醇对铝酸钠溶液的抑制程度很小,产品氢氧化铝的粒度分布基本维持与未添加时一致;添加浓度超过1.5 mmol/L,抑制作用非常明显,产品氢氧化铝粒度曲线主峰明显左移,平均粒度减小。温度越低,苛碱浓度越大,1,2-辛二醇对铝酸钠溶液分解抑制作用越大,产品氢氧化铝的细化程度越大。X射线衍射(XRD)显示,加入1,2-辛二醇后种分产品的晶型不变。The effect of non-ionic surfactant-1,2-Octanediol on the seed precipitation of sodium aluminate solution has been investigated. The results show that 1,2-Octanediol has inhibitory effect on the precipitation. The concentration of 1,2-Octanediol, temperature and caustic concentration of liquor can obviously affect the seed precipitation of sodium aluminate solution. When the concentration of 1,2-Octanediol in the solution is less than 1.25 mmol/L, the inhibitory effect on gibbsite precipitation is limited and the particle size is almost the same as that without additive. However, when the concentration of 1,2-Octanediol in the solution is more than 1.5mmol/L, the inhibitory effect is large and the particle size is decreased. Lower temperature and higher caustic concentration of liquor will greatly decrease the particle size. The results of X-ray diffraction show that the crystal structure of Al（OH）3 products remains the same with additive.

关 键 词：铝酸钠溶液 1 2-辛二醇 粒度 扫描电镜 X射线衍射 

分 类 号：TF111.34[冶金工程—冶金物理化学]