摘要
碳酸钙热分解是分解炉内水泥生料分解的一个重要反应,对水泥生料的分解率和熟料产量有较大的影响。采用热重技术对水泥生料颗粒热分解特性进行研究,采用Kissinger方程和标准主曲线法确定水泥生料颗粒的最可能分解机理。并根据Coats-Redfen`s方程求解水泥生料颗粒的分解动力学参数(E和A)。研究结果表明:水泥生料颗粒的热分解符合相边界反应的收缩柱体反应机理,碳酸钙颗粒的活化能为181.4kJ/mol,其与Kissinger方程所得的估算值相一致。
The thermal decomposition of calcium carbonate is an important chemical reaction during cement raw meal decomposition, on which decomposition rate of raw meal and output of clinker depend, Studied on thermal decomposition mechanism of the meal particles by thermogravimetric analysis （TGA） and found out the most prossible decomposition mechanism by Kissinger Equation and the master plot method, and the decompositon kinetic parameters as E （the activation energy） and A （lore-exponential factor） were determined by Coats-Redfen＇s equation, The results indicate that the thermal decomposition mechanism of raw meal particle is compatible with the shrinkage cylinder pharse boundary movement, and the E of calcium carbonate particle is 181.4 kJ/mol which is almost equal to the value estimated by Kissinger equation.
出处
《水泥工程》
CAS
2007年第6期4-6,18,共4页
Cement Engineering
基金
国家科技支撑计划项目(编号:2006BAF02A24)
硅酸盐材料工程教育部重点实验室(武汉理工大学)开放课题基金(编号:SYSJJ2007-01)
关键词
生料
热重分析
热分解
动力学
机理
raw meal
thermogravimetric analysis
thermal decomposition
kinetics
mechanism
