煤变质程度对煤自燃特性的影响

为了更好地研究煤变质程度对煤自燃特性的影响,选取常村无烟煤、东欢坨气煤、崔矿褐煤等5种不同变质程度的煤样作为实验对象,利用差示扫描量热仪(DSC),通过实验得到不同变质程度煤样的热流差零值点温度、吸热峰峰值温度,吸、放热速率等数据。研究表明:变质程度越高的煤,其热流差零值点温度越高,吸热峰峰值温度越低;变质程度最高的无烟煤吸、放热速率最慢,变质程度最低的褐煤吸热速率最快。变质程度高的煤更不容易自燃。

The influence of metamorphism degree on spontaneous combustion characteristics of coal

In order to better study the influence of metamorphism degree on the spontaneous combustion characteristics of coal,five coal samples with different metamorphism degrees,including Changcun anthracite coal,Donghuantuo gas coal,and lignite from Cui Coal Mine,were selected as experimental objects.The data such as zero point temperature of heat flux difference,absorption peak and peak temperature,heat absorption and exothermic rate of coal samples with different metamorphism degrees were obtained through experiments by DSC.The study shows that the higher the metamorphism degree is,the higher the zero point temperature of heat flux difference is,and the lower the absorption peak and peak temperature is;anthracite coal with the highest degree of metamorphism has the slowest rate of heat absorption and exothermic,lignite with the lowest degree of metamorphism has the fastest rate of heat absorption.The coal with high degree of metamorphism is less prone to spontaneous combustion.