热重分析法对不同粒度煤自燃过程特征温度的研究

选用3种煤分别制得3种粒度的试样。采用非定温测量法进行TG分析,得到相应的TG/DTG曲线,选定煤自燃过程中的6个特征温度,并确定其温度界限,分析不同粒度煤样特征温度的变化并总结规律。结果表明,高位吸附温度和着火温度基本保持不变,其余4个特征温度的变化规律不尽相同。 Choose three kinds of coal and make each into three granularity.TG with non-isothermal measurement is selected and Obtain TG/DTG curves is obtained.Get six characteristic temperatures of the coal spontaneous combustion process.The related temperature ranges is set.With the analysis of the coal samples,the variation law is concluded.The result show that T_1 and T_6 basically keep constant with different granularity,the laws of other four characteristic temperatures are distinct