Effects of Mechanical Activation Methods on Thermo-oxidation Behaviors of Pyrite
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第5期
论文作者：李欣 CHEN Zilin 陈先锋 ZHANG Ying NIU Yi
文章页码：974 - 980
摘 要：To explore the effects of mechanical activation methods（ball mill, planetary mill and rod mill） on the oxidation and the spontaneous combustion of pyrite, the kinetic curves of non-activated pyrite and mechanically activated pyrite were created by simultaneous thermal analysis. The structural characteristics and changes of mechanically activated pyrite were investigated by X-ray diffraction and SEM, and the relationship between the mean diameter and the grinding time was obtained by using a laser particle size analyzer. The kinetic model of pyrite and the kinetic parameters were deduced using Bagchi method. The relationship between the kinetic parameters indicates that, pyrite activated by ball milling shows the best thermal stability at the same diameter. By comparing and analyzing the X-ray diffraction patterns, results show that different mechanical activation ways played different roles in structural changes of pyrite.
李欣，CHEN Zilin，陈先锋，ZHANG Ying，NIU Yi
School of Resources and Environmental Engineering, Wuhan University of Technology
摘 要：To explore the effects of mechanical activation methods（ball mill, planetary mill and rod mill） on the oxidation and the spontaneous combustion of pyrite, the kinetic curves of non-activated pyrite and mechanically activated pyrite were created by simultaneous thermal analysis. The structural characteristics and changes of mechanically activated pyrite were investigated by X-ray diffraction and SEM, and the relationship between the mean diameter and the grinding time was obtained by using a laser particle size analyzer. The kinetic model of pyrite and the kinetic parameters were deduced using Bagchi method. The relationship between the kinetic parameters indicates that, pyrite activated by ball milling shows the best thermal stability at the same diameter. By comparing and analyzing the X-ray diffraction patterns, results show that different mechanical activation ways played different roles in structural changes of pyrite.
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