In order to identify the function between the distribution pattern of steam coal content and ignition and stable combustion characteristics

a mathematical analyzing data test is made to 166 coal qualities used by pulverized-coal fired boiler of large power station in China. This research analyzed the distribution pattern of Vdaf ratio between fixed carbon (Cgt) and equivalent gaseous carbon (Cqt 3.67Har)

and its influence on the ignition and combustion characteristics. With the experimental data from one dimension sedimentation furnace of 77 coals collected from the literatures

the function of ignition temperature to Vad and Aad was simulated

and the distribution characteristics of ignition temperature and heat of different coal samples were calculated and analyzed. A new method for resolving images of ignition temperature and heat was introduced

which has been applied to analyze the characteristics of coal firing. The results showed that it can not only quantitatively distinguish the ignition characteristics among the same and different type of coals

but also give reasonable explanation of macroscopic law in theory.