Zhundong coal is a good coal for power generation due to its easy ignition and high burnout rate. However

the problem of fouling and slagging while using it has seriously affected its development and utilization. In this study

Zhundong coal combustion experiment was carried out on a liquid slag discharge cyclone furnace

and the microscopic appearance and composition of the ash-slag samples were analyzed by a scanning electron microscope. Moreover

the sintering strength of the fly ash was also analyzed. The results show that

the Zhundong coal was completely burned in the cyclone furnace

and the generation of NOx can be controlled by adjusting the air volume and the air distribution mode. In the liquid slag which was formed in the high temperature section of the cyclone furnace

there appeared the enrichment of Fe element. In the ash samples which was formed in the middle temperature section of the cyclone furnace

there appeared the enrichment of Na

Ca and S elements. Both the cyclone ash and slag contained alkali metal elements

the content of alkali metals in the liquid slag was lower than that in the raw coal ash

while that in ash was higher. The sintering strength of the fly ash of the cyclone furnace was high. The low melting point components of Na

Ca silicon aluminates and sulfates were important factors causing the fouling and slagging.