东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (7): 681-684.DOI: -

• 论著 • 上一篇    下一篇

六方水合铝酸钙的合成及其脱硅

刘连利;翟玉春;田彦文;刘玉静   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;锦州师范学院化学系 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-07-15 发布日期:2013-06-24
  • 通讯作者: Liu, L.-L.
  • 作者简介:-
  • 基金资助:
    国家重点基础研究发展规划项目(G1999064901 4)·

Synthesis of calcium hydroaluminate of hexagonal structure and its desilication

Liu, Lian-Li (1); Zhai, Yu-Chun (1); Tian, Yan-Wen (1); Liu, Yu-Jing (2)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China; (2) Dept. of Chem., Jinzhou Normal Univ., Jinzhou 121003, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-07-15 Published:2013-06-24
  • Contact: Liu, L.-L.
  • About author:-
  • Supported by:
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摘要： 叙述了六方水合铝酸钙的合成条件和方法,并通过化学分析、TG DTA分析和XRD分析对所合成的水合铝酸钙进行了表征·实验结果表明,在本实验条件下合成的水合铝酸钙样品中除六方水合铝酸钙外,还含有少量的立方水合铝酸钙和氢氧化钙·在90℃下添加六方水合铝酸钙进行深度脱硅,脱硅2h后的铝酸钠溶液中SiO2质量浓度可降低到0 009g/l,硅量指数可达11111·讨论了六方水合铝酸钙的脱硅机理,认为六方水合铝酸钙是一种高水合、分散度高的含钙化合物,晶面间距大,脱硅反应是在六方水合铝酸钙层间进行的,因此脱硅活性高·

关键词: 六方水合铝酸钙, 深度脱硅, 铝酸钠溶液, 脱硅机理, 氧化铝

Abstract: Synthesis of calcium hydroaluminate of hexagonal structure was reported. The property of calcium hydroaluminate was examined by analysis of chemistry, XRD and TG-DTA. The experimental results showed that the synthetical sample comprise a little calcium hydroaluminate of cubic structure and calcium hydroxide besides calcium hydroaluminate of hexagonal structure. The content of SiO2 decreased to 0.009 g/L and the silicon capacity index reached 11111 by adding calcium hydroaluminate of hexagonal structure at 90°C after two hours. The desilication mechanism of calcium hydroaluminate of hexagonal structure was discussed. It was regarded that calcium hydroaluminate of hexagonal structure was a high-hydration, high-decentralization and loosen calcic compound. Its interval of layers was wide. Since the desilication reaction processed in the interval, the efficiency of desilication was high.

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