硅酸二钙烧成过程动力学参数测定  

Kinetic Parameters Determination of Dicalcium Silicate Sintering Process

作　　者：胥连举[1] 简淼夫[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《硅酸盐通报》2011年第3期710-713,共4页Bulletin of the Chinese Ceramic Society

基　　金：国家"973"(2009CB623102);国家重点基础研究发展计划项目

摘　　要：对硅酸二钙(C2S)形成过程的各项动力学参数进行了测定计算,得到了不同温度下SiO2转化率G与时间t的关系。采用了金斯特林格(Ginstling)方程作为固相反应模型,对C2S的形成过程进行描述;计算了不同煅烧温度下固相反应的反应速率常数K、钙离子的扩散系数D;得到C2S形成的表观活化能Ea为167.4 kJ.mol-1,指前因子A为20.94。Kinetic parameters of dicalcium silicate （C2S）sintering process were calculated. The relationship between silica conversion rate and time under different temperature was obtained. The Ginstling diffusion mold was utilized as solid-state reaction mold to describe the formation process of C2S; reaction rate constant K and diffusion constant of calcium ion D under different temperature and different time were figured. Apparent activation energy Ea and pre-exponential factor A of the formation of C2S are 167.4 kJ· mol1 and 20.94 respectively.

关 键 词：硅酸二钙 固相反应 动力学参数 

分 类 号：TQ172[化学工程—水泥工业]