超细脱硅剂的制备与应用  

Preparation and application of superfine additive of desilication

作　　者：王剑[1] 刘瑛瑛[1] 李来时[1] 翟玉春[2] 

机构地区：[1]沈阳铝镁设计研究院,辽宁沈阳110001 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《轻金属》2010年第8期17-20,24,共5页Light Metals

摘　　要：采用液相沉淀法制备了超细水合铝酸钙(C3AHx),在单因素实验的基础上通过正交实验确定了合成超细水合铝酸钙的最佳工艺条件。采用XRD、SEM对脱硅剂进行物相和粒度形貌分析,探讨其脱硅机理。在最佳条件下添加超细水合铝酸钙进行深度脱硅,脱硅后的铝酸钠溶液中SiO2含量可降低到0.008g/L,硅量指数可达12500。The superfine calcium aluminate hydrate（ C3 AHx） particles were prepared by liquid phase sedimentation. The optimum synthesis conditions of superfine C4 AHx were obtained by orthogonal experiment based on single factor experiments. The phase, appearance and particle size of the additives of desilication were studied by XRD and SEM. The results show that the content of SiO2 can reduce to 0. 008 g/ L and the desilication index can reach 12500 in desilicated sodium aluminate solution with addition of superfine calcium hydroxide in deep disilication under the optimum conditions.

关 键 词：超细 深度脱硅 铝酸钠溶液 水合铝酸钙 

分 类 号：TF821[冶金工程—有色金属冶金] TF803.25