Abstract:The combustion of pulverized coal in blast furnace blowpipes is carried out within a limited space,and is restricted.In order to promote the combustion of pulverized coal in the blowpipe,a two-dimensional model is used to study the effects of coal properties and blast conditions on coal burnout in blast furnace blowpipe.The results confirm that notable improvements in final burnout can be achieved for coal with smaller particles size.Higher volatile matter and higher oxygen enrichment can also improve the final burnout.High blast temperature can increase coal burnout,but the further increase in blast temperature over 1200℃ has little effect on final burnout.In addition,the volatile,temperature and gas composition distribution are also compared,in order to better understand the impact of the operating conditions of the combustion of pulverized coal.