摘要
通过对贵州某中低品位磷矿进行TG-DTG热分析实验,分析了磷矿焙烧过程磷矿中白云石的热分解历程,运用等转化率法和模式配合法相结合的方法,研究了磷矿中白云石的热分解动力学、计算了相关动力学参数、得出磷矿中白云石热分解动力学模型。结果表明,磷矿中白云石热分解分为两个阶段,第一阶段活化能为111.9kJ/mol,遵循二维相界面反应;第二阶段活化能为176.9kJ/mol,遵循三维扩散(Jander方程)。基于研究结果,建立了白云石热分解过程每个阶段的动力学模型。
The TG-DTG thermal analysis experiment of a medium-low grade phosphate ore in Guizhou was carried out to analyze the thermal decomposition process of dolomite in phosphate rock during the calcination process of phosphate ore. The combination of equal conversion rate method and mode matching method was investigated. The thermal decomposition kinetics of dolomite in phosphate ore,the relevant kinetic parameters were calculated,and the thermal decomposition kinetics model of dolomite in phosphate ore was obtained. The results show that the thermal decomposition of dolomite in phosphate ore is divided into two stages. The first stage activation energy is 111.9 kJ/mol,which follows the two-dimensional phase interface reaction. The second stage activation energy is 176.9 kJ/mol,which follows three-dimensional diffusion (Jander equation). Based on the research results,the dynamic model of each stage of dolomite thermal decomposition process is established.
作者
周飞
杨林
曹建新
ZHOU Fei;YANG Lin;CAO Jian-xin(School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China;Key Laboratory of Green Chemical and Clean Energy Technology of Guizhou Province,Guiyang 550025,China;Engineering Research Center for High Efficiency Utilization of Industrial Waste of Guizhou Province,Guiyang 550025,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第5期1377-1383,1389,共8页
Bulletin of the Chinese Ceramic Society
基金
贵州省科技计划项目(黔科合支撑[2016]2330)
贵州省科技创新人才团队(黔科合平台人才[2018]5607)
关键词
磷矿
白云石
热分解
动力学
phosphate ore
dolomite
thermal decomposition
kinetic
作者简介
周飞(1994-),男,硕士研究生.主要从事绿色化工与矿产资源化利用的研究.E-mail:819784404@qq.com;通讯作者:曹建新,博士,教授.E-mail:jxcao@gzu.edu.cn.
