Abstract: The utilization of coal injection was analyzed by testing the burning rate of coal injected into the BF in HANSTEEL. The carbon content of dust from BF was determined via lithofacies analysis made to differentiate the structure of UPC from that of the coke in dust, thus determining the source of carbon-bearing substances in BF dust. The results showed that the BF dust contains comparatively high carbon content, among which the UPC particles are in three forms: slightly changed coal, porous coal and redidual carbon particles. And the structure of coke particles can be divided into filament-like, granular mosaic, flowing, flake-like and blocky textures. According to what coal is used and mixed for the BF in HANSTEEL at present, some suggestions are given to improve efficiently the burning rate of pulverized coal in HANSTEEL, and the coal from Changzhi/Dawan is preferable to mixed coal injection.