Experimental Study on Characteristic Parameters of Coal Spontaneous Combustion

AbstractTo investigate the spontaneous combustion of coal, a moderate scale experiment was carried out on the XK-III apparatus. Total 1500kg coal was stored in the furnace with air supply. The coal undergone 39 days to reach 158°C, at which the coal started to combustion. The temperature history of coal shows that the temperature rise was sped up after 30 days when the temperature is 60°C. Before that, the coal was undergoing a slow oxidation process, and after that, the heating rate increased from 0.4°C/h to 2.5°C/h and the oxygen consumption increasing correspondingly. Furthermore, the production rate of CO and CO2 increases rapidly. Therefore, the thermal runaway temperature is at 60°C for the 1500kg coal in a cylinder stockpile