By using the combustion test stand in Xi'an Thermal Power Research Institute Co Ltd

the properties of ignition

burn-away

as well as contamination and slagging of zhundong coal sort have been studied

results show that the Zhundong coal has excellent ignition and burn-away properties

but its contamination and slagging properties are severe.For boilers being in service

the managemetn of coal-pile and coal-distributing pipes has to be strengthened

reasonably controlling the proportioning ratio of Zhundong coal

optimizing the operation mode of boilers

and suitably increasing sootblowing times for easily slagging locations.For newly constructed boilers

the consideration has to be centered on aspects of combustion mode

thermal load in the furnace

flue gas temperature at outlet of the furnace

fineness of the pulverized coal

and arrangement of the sootblowers etc.

effectively preventing the heating surface from contamination and slagging.