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Mold biomass pellets have been utilized on a 300MW pulverized coal-fired furnace in China for the first time. Biomass was ground using the existing mill system, and without using any additional equipment. The maximum ratio of the biomass used in the experiments is 16.1% by energy input. The feasibility of grinding biomass and the safety of mill operation have been analyzed. In addition, the effects of co-firing biomass on the flame, temperature, pollutant emission, and unburned carbon in ash have been investigated. Also the characteristics of fly ash and its utilization in the concrete have been tested. The results show that existing roller mills and direct-blowing pulverizing systems can be used to grind mold biomass and to transport pulverized biomass within the limit in the flow rate of the biomass that can be processed. During the processes of biomass co-firing, the flame on the biomass injector is stable, but the …