Abstract:Biomass is low carbon and environmentally friendly, which can be used for iron ore reduction to realize the green development for iron and steel enterprises. In order to explore a fast and efficient direct reduction method, the pyrolysis characteristics of biomass and the reduction of iron concentrate are studied. The results show that, the biomass can be rapidly pyrolyzed at low temperature. When the pyrolysis temperature is 693 ℃, the weight loss rate reaches 66.76%, and the maximum weight loss rate reaches 7.85% /min. The gaseous product generated by biomass pyrolysis mainly include CO, CO2, CH4, C2H4, H2, etc., the addition of iron ore is conducive to the transformation of hydrocarbons into CO, and the existence of sufficient fixed carbon is the guarantee to realize the rapid reduction of biomass iron concentrate at low temperature. When the molar ratio of carbon to iron is 0.4 and the reduction temperature is 1 050 ℃, the metallization rate of the reduction products is 82.97%, the rapid reduction of iron concentrate at low temperature can be realized.