Under certain operating condition and atmosphere inside the furnace

various chemical constituents in ash and their phase play a decisive role on the fusing behavior of ash.The fusing behavior of ash has been studied from analysis in three aspects

i.e.ash fusing point

ash composition

and the XRD phase.Results show that:under condition of far lower than the ash fusing point

a part of minerals inside ash has been sintered

these local fusion is one of the causes which leads mineral particles to adhere to each other

the existence of low fusing point eutectic phase resulting from reaction of calcium compounds due to reaction of CaO

Al2O3/MgO/ZnO and SiO2 etc.is the main cause of slagging.