为了研究超细粉碎处理对煤颗粒在热加工特性上的影响，利用热重-差热综合热分析仪分别对3种不同粒度的煤颗粒样品进行热解实验，并通过红外光谱测试分析煤粉颗粒表面分子结构的变化情况。结果表明，煤颗粒经过超细粉碎处理后，热重曲线（TG）向低温方向平移，差式扫描量热（DSC）曲线由近乎线性变为起伏剧烈，两者的微分曲线DTG和DDSC都产生波动峰的增加。这是由于超细煤颗粒的微观孔隙结构和表面分子结构发生显著变化，使得热分解反应所需温度降低，反应分散到多个温度段进行。

In order to explore the influence of ultrafine grinding on pyrolysis properties of coal particles,the pulverized coal samples with 3 different particle diameters are used in the pyrolysis experiment by thermogravimetric-differential thermal analyzer,while the changes of molecular structure on the surface of coal particles are analyzed by Fourier-transform infrared spectrometer.The results show that the thermogravimetric (TG) curve of coal samples moves towards low temperature after coal particles are grinded in an ultrafine degree,and their differential scanning calorimetry (DSC) curve become violent.There are growths in wave peaks of DTG and DDSC curves,which are caused by the significant changes of micro-pore structure and surface molecular structure of ultrafine coal particles.The temperature required for the pyrolysis reaction drops,and the reaction disperses to several temperature ranges.

尹力(1991-),男,博士生,研究方向为超细粉碎技术及应用,yinliecust@foxmail.com