Mechanism of Mechanical Activation for Spontaneous Combustion of Sulfide Minerals

摘要：

　　In order to uncover the intrinsic reasons for spontaneous combustion of sulfide minerals, representative samples were collected from typical metal mines to carry out the mechanical activation experiment.The structures and heat behaviors of activated samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and simultaneous thermal analysis (STA).It is found that sulfide minerals after mechanical activation show many changes with increased specific surface areas, aggregation phenomenon, decrease diffraction peak intensity, broadened diffraction peak, declined initial temperatures of heat release and self-ignition points.A new theory for explaining the spontaneous combustion of sulfide minerals is put forward: the chemical reaction activity of sulfide minerals is heightened by all kinds of mechanical forces during the mining, and the spontaneous combustion takes place finally under proper environment.

关键词： metal mines mining sulfide minerals spontaneous combustion mechanical activation reaction mechanism chemical reaction activity

作者: YANG Fuqiang WU Chao

作者单位: College of Environment and Resources, Fuzhou University, Fuzhou 350108, Fujian, China;School of Reso School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China

会议类型: 国际会议

会议名称: The 2016 International Symposium on Safety Science and Technology(2016安全科学与技术国际会议)

会议地点: 昆明

会议语种:英文

页码: 518-524

在线出版日期: 2016-10-17（万方平台首次上网日期，不代表论文的发表时间）