硫铁矿石热自燃机理研究及其探讨  

Research and Discussion on Spontaneous Combustion Mechanism of Pyrites

作　　者：董洪芹[1] 陈先锋[1] 杨海燕[1] 刘校 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070

出　　处：《工业安全与环保》2016年第2期46-50,共5页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51174153;51374164)

摘　　要：硫铁矿石自燃是矿山开采中面临的重大灾害之一。矿石自燃不仅会造成巨大的资源浪费和经济损失,还将引发一系列的安全与环境问题。通过研究硫铁矿石自燃的化学热力学机理,掌握了导致硫铁矿自燃的主要原因。利用DSC曲线对硫铁矿自燃过程的氧化特性进行研究,通过对比不同粒径的热流曲线及特征温度点的变化趋势,分析硫铁矿自燃特性的变化规律。应用热分析动力学方法计算了硫铁矿的活化能,比较不同粒径下矿样的活化能大小,为判断其自燃可能性和自燃特性研究提供依据。Spontaneous combustion of pyrites is one of the major disasters in mining process. Spontaneous combustion of ore would not only cause a huge of resource wastes and economic losses,but also trigger a series of safety and environmental issues. This paper studies the chemical thermodynamics mechanism of spontaneous combusted pyrites and the main reasons leading to spontaneous combustion of pyrites are found out. The oxidation characteristic in the spontaneous combustion process of pyrite is studied by analyzing the DSC curves and the change rules of spontaneous combustion characteristics are analyzed through comparing the heat flow curves and change tendencies in the characteristic temperature points between different particle sizes of pyrite samples. The activation energies of pyrites are calculated by thermal analysis dynamics methods,and activation energy values of pyrite samples in different particle sizes are compared,providing the basis for the study of the possibilities and characters of spontaneous combustion.

关 键 词：硫铁矿 热自燃 热动力学 活化能 

分 类 号：TD752.2[矿业工程—矿井通风与安全]