| Kinetics of the smelting reduction of iron ore by the graphite crucible and the carbon-saturated molten iron was investigated between 1400℃ and 1550℃. At 1500℃. by the graphite crucible, the reduction rate of iron ore was found to be 8.88 × 10-5mol/cm2·sec, and by the molten iron, 8.25 × 10-5mol/cm2·sec. The activation energies for the reduction by the graphite crucible and the molten iron were 24.1kcal/mol and 22.9kcal/mol, respectively. For the smelting reduction by the graphite crucible, it was found from the comparison of each elementary reaction rate that the overall reaction was controlled by the chemical reaction(C+CO2=2CO) between carbon in the carburized iron and CO2 gas. Based on the results of present research and X-ray fluoroscopic observation, it could be concluded that these two reduction reactions of iron ore by the graphite crucible and the molten iron are essentially the same. |
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