Due to high alkali metal content

Xinjiang Zhundong coal has experienced serious slagging and fouling problems during combustion. To solve these problems

this paper studies the migration law of alkaline metals on cyclone furnace. Samples were collected on industrial cyclone furnace and cyclone furnace test bench

the elements and crystal compounds were analyzed by energy dispersive spectroscopy(EDS) and X-ray diffraction(XRD)

and the flue gas temperature at the sampling sites was detected. The results show that

the alkaline metal had a tendency to enrich in the boiler tail. In the front chamber at high temperatures

the liquid slag could capture part of the alkaline metal

and the alkali metal enrichment occurred in the burnout chamber

superheater and tail cyclone. At 854～1 200 ℃

a large amount of alkaline metal vulcanized and condensed on the heating surface

and at 726～834 ℃

a portion of the alkali metal reacted to form some low-temperature co-melt

which fouled the heating surface. To fully burning Zhundong coal on cyclone furnace

further research on how to increase the capture rate of alkaline metal elements and reduce the migration of alkaline metals to the boiler tail needs to be carried out.