树皮煤受热物理变化特征研究  

The changes of physical characteristics of bark coal when heating

作　　者：孙翊博 王绍清[1] 舒昆昆 苏珅 马薇[1] 邵瑞[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京市海淀区100083

出　　处：《中国煤炭》2017年第3期93-98,共6页China Coal

基　　金：国家自然科学基金-青年基金(41102097);中央高校基本科研业务费专项资金项目(2010QD02)

摘　　要：选择了江西乐平典型树皮煤样品作为研究对象,应用显微热台手段研究了树皮体受热后的物理及化学变化特征,并进一步分析了粒度对其的影响。研究表明,树皮煤宏观煤岩类型主要以半暗煤为主,煤化学特征主要为高氢含量、高挥发分以及高H/C原子比。样品受热过程主要经历了3个阶段,即初变阶段、渐变阶段及剧变阶段,剧烈反应发生在430℃以后,出现了流动状态,其中树皮体出现了生油现象,镜质组也逐渐产生裂隙;树皮体与镜质组受热后变化特征并不相同,加热过程中树皮体热变化特征比镜质组变化大;另外,加热过程中样品粒度越大,则反应时间越早、反应强度越大且流动状态越强。The authors selected typical bark coal of Leping in Jiangxi as study object,applied microscopic heating stage studied changes on physical and chemical characteristics of barkinite during heated treatment,and analyzed the influence of particle size on its changing.The results showed that the primary of bark coal of macrolithotype coal petrography type was semi dull coal,the chemical features of the coal were high hydrogen content,high volatiles and high H/C atomic ratio.The heating process of the coal sample had three stages,preliminary change stage,transitional change stage,and intense change stage.The intense reaction and flow state was occurred when the temperature were up to 430℃＂,the barkinite appeared oil,virtrinite appears cracks,the changing characteristics of barkinite were more obvious than that of vitrinite when heating,in additional,the larger size of the particle size,the shorter of the reaction time,the greater reaction intensity,and the stronger of the flow state.

关 键 词：煤 树皮体 显微热台 粒度 

分 类 号：TQ530[化学工程—煤化学工程]