膜科学与技术

碳酸钙形貌对陶瓷膜过滤性能的影响

作者：江文叶，胡俭，张峰，邢卫红

单位：南京工业大学化学化工学院，国家特种分离膜工程技术研究中心，江苏南京，210009

关键词：碳酸钙;陶瓷膜;形貌

出版年,卷(期):页码： 2014,34(4):1-5

摘要：

陶瓷膜进行超细粉体的固液分离时，粉体性质对膜分离性能影响显著。本文通过控制沉淀反应条件，获得了球形、棒状、方形等不同形貌的碳酸钙超细粉体；采用陶瓷膜过滤碳酸钙悬浮液，得到膜孔径与碳酸钙粉体粒径、形貌的匹配关系，球形粉体的膜渗透通量最高，棒状束粉体居中，方形粉体的膜渗透通量最小；膜孔径越大，粉体形貌对通量的影响越大；粉体粒径与膜孔径比值增大，膜通量增大

Ceramic membrane was widely used to separateultrafinepowder suspension. The separation performance was significantlyinfluenced by the properties of particles. The spherical powder, square powder and bundle of rod-like powder of CaCO3 were obtained respectively through controlling the precipitationreaction conditions.The matching relations between pore size of membrane and the properties of particlessuch as size and morphologywere got. The order of the flux of ceramic membrane for separating particlesuspension was:spherical powder> bundle of rod-like powder>square powder. The larger the pore size of ceramic membrane was,the greater influence of morphology of powder on separation performance was. The flux increasedwith the increasing of ratio of particalsize and pore size of ceramic membrane.

江文叶，(1987-),女，江苏连云港人，硕士研究生，研究方向为膜分离；邢卫红（联系人），研究员， E-mail：xingwh@njut.edu.cn

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