中南大学学报（自然科学版）2018，Vol.49Issue(1)：1-7,7.DOI:10.11817/j.issn.1672-7207.2018.01.001
多种热分析法解算硫化矿石氧化分解动力学参数的对比
Comparison of kinetic parameters of oxidation and decomposition of sulfide ores by different thermoanalytical methods
摘要
Abstract
In order to reveal the difference of several thermal analysis methods for calculating the kinetic parameters of the oxidation reaction of sulfide ores, thermal analysis experiment was carried out on a sample from typical sulfur-rich mine by using STA449C thermal analyzer. Integration methods such as Coats-Redfern, Doyle, Flynn-Wall-Ozawa (FWO) and differentiation methods such as Kissinger, Fridman and Achar were used to calculate the dynamic reaction parameters of oxidation decomposition of sulfide ore samples. The results show that the oxidation process of sulfide ores is in accordance with the first order reaction kinetics mechanism. The kinetic parameter values of sulfide ore samples at the high temperature stage are significantly higher than those at low temperature. By comparison of the results of different thermal analysis methods, it can be concluded that the results obtained by the different methods can all show combustion diversities of oxidation reaction of sulfide ores, but the discrepancy among results is remarkable depending on the specific method of calculation used. Therefore, the FWO method is used to check the kinetic parameters of the oxidation and decomposition process of sulfide ores by using the method of Coats-Redfern or Doyle by thermal analysis method under appropriate heating rate.关键词
硫化矿石/自燃/热分析/动力学参数/求解方法Key words
sulfide ores/spontaneous combustion/thermoanalysis/dynamic parameters/solving methods分类
资源环境引用本文复制引用
阳富强,刘晓霞,朱伟方..多种热分析法解算硫化矿石氧化分解动力学参数的对比[J].中南大学学报（自然科学版）,2018,49(1):1-7,7.基金项目
国家自然科学基金资助项目(51741402,51304051) （51741402,51304051）
福建省自然科学基金资助项目(2016J01224) （2016J01224）
河南省瓦斯地质与瓦斯治理重点实验室—省部共建国家重点实验室培育基地开放基金资助项目(WS2017B03) (Projects(51741402, 51304051) supported by the National Natural Science Foundation of China （WS2017B03）
Project(2016J01224) supported by the Fujian Provincial Natural Science Foundation （2016J01224）
Project(WS2017B03) supported by the State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University) （WS2017B03）
