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过程工程学报 ›› 2016, Vol. 16 ›› Issue (1): 156-163.DOI: 10.12034/j.issn.1009-606X.215315

• 材料工程专栏 • 上一篇    下一篇

粉煤灰预脱硅液动态水热合成硅酸钙晶须的影响因素

李洋洋 马淑花 王建宇 王晓辉 郑诗礼   

  1. 北京化工大学化学工程学院 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所
  • 收稿日期:2015-08-21 修回日期:2015-11-06 出版日期:2016-02-20 发布日期:2016-12-22
  • 通讯作者: 李洋洋

Influential Factors on Synthesis of Calcium Silicate Whisker from Desilication Solution of Coal Combustion Fly Ash by Dynamic Hydrothermal Method

LI Yang-yang MA Shu-hua WANG Jian-yu WANG Xiao-hui ZHENG Shi-li   

  1. College of Chemical Engineering, Beijing University of Chemical Technology Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2015-08-21 Revised:2015-11-06 Online:2016-02-20 Published:2016-12-22
  • Contact: LI Yang-yang

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摘要： 以分析纯试剂模拟粉煤灰预脱硅液，采用动态水热法合成硅酸钙晶须，研究了反应体系碱浓度、反应温度、反应时间、溶液中铝硅(Al2O3与SiO2)和钙硅(CaO与SiO2)质量比对产物物相组成及其形貌的影响. 结果表明，控制碱浓度80 g/L以下，反应温度220℃，反应时间6 h，铝硅质量比0.06以下，钙硅质量比0.9，可制备出纯度83%以上的硅酸钙晶须，晶须长度可达20 mm.

关键词: 脱硅液, 水热法, 硅酸钙晶须, 粉煤灰

Abstract: Calcium silicate whisker was prepared by dynamic hydrothermal method using analytical reagents to simulate desilication solution of coal combustion fly ash as raw material. The effects of Na2O concentration, reaction temperature, reaction time, mass ratio of alumina to silica and mass ratio of calcia to silica in the solution on phase composition and morphology of product were examined. The results revealed that calcium silicate whisker with the length over 20 mm and purity over 80% was synthesized under the conditions of Na2O concentration at 80 g/L, reaction temperature 220℃, reaction time 6 h, mass ratio of alumina to silica 0.06 and mass ratio of calcia to silica 0.9.

Key words: desilication solution, hydrothermal method, calcium silicate whisker, fly ash

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