Research on combustion features of medium volatile matter bituminous coal

In order to define combustion features of bituminous coal with medium volatile matter,thermogravimetric analysis method was applied to the thermogravimet ric test on the six coal samples with volatile matter of 20% ~ 30% and the sample feature parameters were obtained. According to the feature parameter,a calculation was C onducted on the index from analysis of coal volatile matter,combustion feature index and burnout feature index. The results showed that with the volatile matter content incr eased,the thermal weight loss curve would move forward to a low temperature direction and the relevant feature temperature( ignition temperature, the max reaction rate to the corresponding temperature and burnout temperature) would be reduced with the volatile matter increased. The feature index D,combustion feature index S ,burnout feat ures index FZfrom the analysis of the coal volatile matter could well reflect the coal ignition features,combustion comprehensive features and burnout features. The volatile matter of coal types tested within a scope of D,S and FZwas( 3.11 ~3. 69) x10-5、(0. 93~ 1. 25)x 10-7、2. 89 ~ 5.12 individually. With the volatile matter increased,ther e was an increased tendency and the influences of other factors could be reflected.