碳化法制备超细球形碳酸钙初探  

Preparation of Super-fine Spherical CaCO_3 by the Carbonation Method

作　　者：向兰[1] 向英[1] 袁红霞[1] 王亭杰[1] 

机构地区：[1]清华大学化工系,北京100084

出　　处：《过程工程学报》2002年第1期50-54,共5页The Chinese Journal of Process Engineering

摘　　要：研究了利用改进的碳化法合成超细球形碳酸钙的可行性. 考察了布气方式(板式及管式气体分布器)、化学添加剂以及CO2/N2混合气体组成对碳酸钙粒径和形貌的影响. 结果表明,采用小气泡及CO2含量较高的混合气体有利于形成超细碳酸钙,加入少量添加剂如ZnCl2,MgCl2或EDTA可明显改变碳酸钙粒子的形貌和大小.The feasibility of preparing super-fine CaCO3 powder by an improved carbonation method was studied.The influence of gas distribution, chemical agents and CO2/N2 mixture on the size and morphology of CaCO3 was investigated. Bubbles with smaller size and gas mixture with higher CO2 concentration are favorable to the formation of super-fine CaCO3. The morphology and diameter of CaCO3 product are influenced obviously by the addition of additives such as ZnCl2, MgCl2 or EDTA .

关 键 词：碳酸钙 超细粉体 碳化法 管式分布器 添加剂 制备 

分 类 号：TF123.72[冶金工程—粉末冶金] TQ132.32[冶金工程—冶金物理化学]