电石渣与石灰石热分解特性比较及电石渣热分解动力学  

COMPARISON OF THERMAL DECOMPOSITION CHARACTERISTICS OF CARBIDE SLUDGE AND LIMESTONE AND THERMAL DECOMPOSITION KINETICS OF CARBIDE SLUDGE

作　　者：闫羽[1] 李福洲[1] 陶从喜[2] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]天津水泥工业设计研究院有限公司,天津300400

出　　处：《硅酸盐学报》2009年第7期1201-1205,共5页Journal of The Chinese Ceramic Society

摘　　要：用热分析曲线比较电石渣和石灰石分解特性。通过热分析得到电石渣中氢氧化钙和石灰石中碳酸钙分解热耗分别为72.253kJ/mol和142.933kJ/mol;热力学计算氢氧化钙和碳酸钙理论分解热耗分别为101.625kJ/mol和166.232kJ/mol,热分析结果比热力学计算值低。采用Melak法求得电石渣中氢氧化钙分解的活化能Ea=124.01kJ/mol,反应机理函数微分形式为f(a)=(1–a)2/3(其中a为相应物质转化率),动力学因子为20.92。The carbide sludge and limestone heat decomposition characteristics are compared and the thermal decomposition process is illustrated by the measured thermal decomposition curves. The heat of decomposition of Ca（OH）2 in carbide sludge is 72.253 kJ/mol and the decomposition of CaCO3 in limestone is 142.933 kJ/mol, and which are lower than the thermodynamic calculation data which the heat of decomposition of Ca（OH）2 is 101.625 kJ/mol and the decomposition of CaCO3 is 166.232 kJ/mol, The activity energy of the thermal decomposition of Ca（OH）2 in carbide sludge is 124.01 kJ/mol, the reaction function is f（a）=（1-a）^2/3 and the pre-exponential factor is 20.92, which are deduced using the Melak method.

关 键 词：电石渣 分解热耗 分解动力学 活化能 反应机理 动力学因子 

分 类 号：TB321[一般工业技术—材料科学与工程]