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Natural gas is utilized as a reductant in a direct reduced iron (DRI) process to produce iron, while the main reductant of a blast furnace process is coke.1,2) DRI is predominantly charged into an electric arc furnace process as virgin metal to attenuate tramp elements such as Ni, Cr, Mo, Cu and Sn in steel. DRI production has been increased from 0.79 Mt/ year in 1970 to 68.4 Mt/year in 2008 significantly.3) The DRI prodcess has the strong advantage points, such as low investment cost and high flexibility of production. Then, the DRI process would be one of the promising iron making process.4,5) Recently, a shaft furnace process using natural gas as a reducing agent is the predominantly process to produce DRI. In the shaft furnace process, the reducing gas, CO and H2, is produced by the reforming reaction of CH4 and CO2 reforming. The reducing gas is heated up to around 1 000°C and blown into the reaction furnace. Simultaneously, carbon deposition reaction6–12) by CO–H2 gas mixture may occur around 600°C in the reduction process according Effect of Temperature and CO2 Concentration on Gasification Behavior of Carbon Fiber Containing Fine Iron Particles

Effect of Temperature and CO<sub>2</sub> Concentration on Gasification Behavior of Carbon Fiber Containing Fine Iron Particles