Study on physicochemical characteristics and combustion performance of Zhundong coal in different mining depth

Tianchi energy coal samples in shallow and deep layer were selected,Datong bituminous coal as a comparison,the influence of the mining depth on coal quality and combustion characteristic was studied. It provided necessary theoretical basis for the exploration and burning of Zhundong coal. The research showed that with the increase of mining depth,there were less moisture,less ash content in coal,calorific value increased and sulfur-containing decreased, coal quality got closer to bituminous coal; Fe 2 O 3 in ash significantly decreased and the slagging tendency of coal mitigated; ignition temperature of coal slightly decreased while combustion rate increased and combustion characteristic got better. Compared with Datong bituminous coal,ZhunDong coal is higher in moisture,lower in calorific value,lower in nitrogen content; its ignition temperature is significantly lower in combustion and the combustion rate is lower.