Under condition of different coefficient of excess air

temperature in furnace

and fineness of pulverized coal

etc.

through test of combustion chavacters in fallout furnace

the variating regularity of combustion characters

such as ignition

combustion

and slagging etc.

of blended coal obtained from blending different coal sort with different proportioning ratio

as well as their affecting factors have been studied.Study shows that:(1)the volatile matter content in the blended coal has decreased

the ignition temperature being gradually enhanced

the delayed ignition of pulverized coal making the burn-up behavior to be worsened;(2)the calorific value of blended coal has lowered

leading to ignition temperature to be gradually enhanced

and the unburned combustibles in fly ash to be heightened;(3)the better fineness of pulverized coal is more helpful to ignition under certain concentration of the pulverized coal.