Abstract: Sintering is an important process during producing iron and steel in industry， however， it produces a large amount of high-temperature sintering flue gas which contains particulate matter， sulfur dioxide， nitrogen oxides， dioxins， etc. In order to reduce sintering pollutant， a new type of biomass fuel to replace the traditional coke fuel was prepared and the optimized preparation condition of the biomass fuel was studied by comparing the results from the experiments of biomass carbonization and biomass forming. The results show that the sawdust carbonization is divided into two stages: the suitable carbonization heating rate is 5℃/min at the stage of room temperature (25℃) to 400℃ and 20℃/min at the stage of 400℃ to 600℃. The sawdust optimal forming pressure is about 50MPa. By the comparison of the performance of optimized biomass fuel and traditional ore fuel， it is indicated that the effectiveness of biomass fuel can be close to that of ore fuel after improving the specific surface area， pore volume and fuel combustion performance.

Key words: sintering flue gas, biomass forming, biomass carbonization, biomass fuel