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›› 2002, Vol. 2 ›› Issue (1): 0-0.

• 1 •    

碳化法制备超细球形碳酸钙初探

向兰，向英，袁红霞，王亭杰   

  1. 清华大学化工系, 北京 100084
  • 出版日期:2002-02-20 发布日期:2002-02-20

Preparation of Super-fine Spherical CaCO3 by the Carbonation Method

XIANG Lan, XIANG Ying, YUAN Hong-xia, WANG Ting-jie   

  1. Dept. Chem. Eng., Tsinghua Univ., Beijing 100084, China
  • Online:2002-02-20 Published:2002-02-20

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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.

关键词: 碳酸钙, 超细粉体, 碳化法, 管式分布器, 添加剂

Abstract: 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 .

Key words: calcium carbonate, super-fine powder, carbonation method, tube sparger, additive

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