Kinetics of Hydrothermal Decomposition of Potassium Feldspar with Calcium Hydroxide

摘要：

　　The aegirine-augite syenite potash ore,taken from Changling,Luonan in Shannxi province,were hydrothermally decomposed over the temperature ranges of 533 K to 563 K using calcium hydroxide as additive.The dissolution ratio of the K2O at different reaction temperature and time was determined.Analysis of the experimental results revealed that the dissolution rate of potash ore satisfies the chemical reaction controlled kinetic equation.The rate constant ofhydrothermal reaction at different temperatures was obtained.The activation energy was calculated using the Arrhenius equation.The hydrothermal decomposition mechanism of microcline was proposed.

关键词： Potash ore Hydrothermal decomposition Kinetics Decomposition mechanism

作者: Yuqin Liu Hongtu Xia Hongwen Ma

作者单位: School of Materials Science and Technology, China University of Geosciences, Beijing 100083,China

会议类型: 国际会议

会议名称: 2012 2nd International Symposium on Chemical Engineering and Material Properties(ISCEMP2012)(2012第二届化学工程与材料特性国际研讨会)

会议地点: 太原

会议语种:英文

页码: 65-69

在线出版日期: 2012-06-23（万方平台首次上网日期，不代表论文的发表时间）