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.%为了表征不同热分析法在解算硫化矿石氧化分解反应动力学参数中所呈现出的差异,采用STA449C型热分析仪对采自典型高硫矿山的硫化矿样进行热分析实验;分别运用Coats-Redfem,Doyle,Flynn-Wall-Ozawa(FWO)等积分法和Kissinger,Fridman,Achar等微分法求解出该矿样的氧化分解反应动力学参数.研究结果表明:硫化矿石的氧化分解进程符合一级反应动力学机制;硫化矿石在高温反应阶段的动力学参数值明显高于低温阶段的动力学参数值.对6种热分析方法的求解值进行比较发现,尽管不同热分析法的求解结果都能反映硫化矿石的氧化分解过程,但具体方法不同,结果相差较大.因此,通过热分析手段选择合适的升温速率,以Coats-Redfern法或Doyle法求解并采用FWO法分析校检,可以得到较好反映硫化矿石氧化分解过程的动力学参数.
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