Numerical simulation on pulverized coal combustion in blowpipe

In the condition of high rate of pulverized coal injection,incomplete combustion of partial pulverized coal will take place and unburned coal appears and accumulates in blast furnace,which affects the permeability of burden column.The combustion of pulverized coal in blowpipe was studied using the commercial software fluent and some features of combustion were obtained with different injection rates and pulverized coal diameters.When the diameter of coal particle increased from 30 μm to 90 μm,the burn rate of pulverized coal decreased from 37.3 % to 28.8 %.The simulation results are basically in agreement with measured results.