Developments for the Advanced Reaction Simulator of Blast Furnace Combined with Calculation Model and Experimental Furnace

摘要

The use of high reactivity coke is a technology that dramatically improves the reaction efficiency in blast furnace by decreasing the temperature of the thermal reserve zone.In this study,the shaft simulator of the blast furnace was developed to estimate the temperature of the thermal reserve zone and distribution of temperature and gas composition in blast furnace through the use of different reactivity coke.The shaft simulator is combined with experimental furnace and calculation model.Chemical reaction and mass/heat transfer phenomena in blast furnace are considered in calculation model,so to calculate the ore and coke reaction rate and distribution of temperature and gas composition.Packed coke and sinter,relatively small amount of specimen,is reacted with temperature and gas composition controlled by calculation results.The coke gasification rate is fed back to calculation model,and then it is possible to estimate the temperature of the thermal reserve zone and distribution of temperature and gas composition in blast furnace.The shaft simulator experiment with high reactivity coke,such as CIC (Carbon Iron Composite),showed 140 K lower the temperature of the thermal reserve zone than the case of conventional coke.