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›› 2004, Vol. 4 ›› Issue (4): 330-334.

• 材料专栏 • 上一篇    下一篇

涡流技术制备超微CaCO3新工艺与工艺参数初探

张毅,李永超,田苗,马秀清,金日光   

  1. 北京化工大学材料科学与工程学院
  • 出版日期:2004-08-20 发布日期:2004-08-20

A New Method for Preparing Ultra-fine CaCO3 Powder via a Turbo-flow Micro-reactor and Exploration of Technological Parameters

ZHANG Yi,LI Yong-chao,TIAN Miao,MA Xiu-qing,JIN Ri-guang   

  1. College of Materials Science and Engineering, Beijing Univ. Chem. & Technol.,
  • Online:2004-08-20 Published:2004-08-20

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摘要： 使用高剪切涡流装置，通过涡轮转子高速剪切形成的涡流气液湍流，实现了氢氧化钙悬浊液与二氧化碳混合气异相反应的超细均匀分散. 该设备体积小. 该法的主要特点在于反应物能在一定压力下定量进入高剪切釜进一步破碎，达到粒径分布均匀，产出高并能连续生产超微沉淀碳酸钙，其平均表观粒径≤30 nm，并有较窄的粒径分布，尺寸可控. 还探索了该工艺所必需的各种参数及反应条件.

关键词: 超微沉淀碳酸钙, 添加剂, 影响因素, 碳化温度, 碳化时间

Abstract: A new method is reported for preparing ultra-fine CaCO3 power with average apparent particle size of about 20~30 nm by the new turbo-flow equipment with high shearing force. The suspension of Ca(OH)2 and mixture gases of CO2 and air were dispersed well in the turbo-flow equipment, and smashed in the high-shearing container under certain pressure. This method can control the shape and size of CaCO3 powder. In this technology, the equipment is simple with small volume and high efficiency, and the fluid flows smoothly and quantificationally. The technological parameters of the new method were also explored.

Key words: ultra-fine CaCO3, additional agent, impact factor, carbonizing temperature, reaction time