Preliminary Study On Ore Ironmaking Technology Using Biomass

Biomass is an important part of the renewable energy resources. The efficient utilization of biomass plays a very positive role in solving problems on energy resources and ecology environment. Based on this point, the paper proposes a new method of iron ore reduction, in which biomass is used to replace coal and coke involved in the traditional technology, and the feasibility of this experiment is also discussed. Thus the consumption of the fossil energy can be greatly reduced, and the atmosphere and ecology problems caused by ironmaking can also be solved in an efficient way.The paper is based on the oxygen-rich combustion of biomass and H2 reduction theory of iron ore. Firstly, the biomass is shredded into powder, in order to increase the efficiency of the combustion in the furnace, generally the temperature in the furnace can reach 1200℃, or 1500℃in the condition of oxygen-rich. That is a necessary temperature for iron ore reduction. Secondly, the H2 is a clean reductant, which can reduce iron ore in the high temperature. Through regulating the temperature and time, the required conditions of biomass ironmaking is firstly explored and how the conditions influent the results is then discussed.Also, some preliminary study on the making of spherical agglomeration is done in this paper. We changed the percentage composition of iron ore, biomass powder(pulverized coal), limestone powder, bentonite to make different samples, then analyzed results of ironmaking with different samples.Based on the analyses of biomass combustion characteristics, measurement of the furnace temperature, theory of iron ore reduction and so on, the paper systemically expounds feasibility of the biomass ironmaking technique. Finally, according to the element analyses and component analyses of reduced products, we found out that the percentage composition of Fe is about 77%-90%; the percentage composition of S, P, Mn is low and stable; the percentage composition of Al, Ca, Si is relatively higher; and the percentage composition of C is low, less than 0.5%.This paper's conception is new and unique. Using biomass in the steel industry can alleviate the enormously environmental pressure. Meanwhile, this study has also established a firm foundation and provides sufficient experiment data for the subsequent studies.