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不同气氛下煤粉与水泥生料混合物的热分析(英文)

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Abstract:

将入分解炉生料和煤粉按一定质量比进行混合。在3种不同气氛(O2,CO2,50%O2与50%CO2)下,以20K/min的升温速率利用热天平分别对生料及混合料的升温过程进行研究。根据相关系数|r|值,分析表明反应过程中同时受相界面反应机理和成核与生长反应机理控制,O2气氛下相界面反应机理起主要作用,随着气氛中CO2分压的增大,成核与生长反应机理逐渐占据优势。通过求解不同反应条件下的动力学参数活化能E和指前因子lnA,发现气氛中O2分压的增大及煤粉燃烧都将使反应的活化能降低。

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