| Abstract |
| In order to investigate the effect of particle shape on the gaseous reduction rate of iron ore, iron oxide pellets of various shapes including the long cylindrical-and disc shape were reduced with CO-CO2 gas mixturein in the mixed-control regime. Experimental results showed that the reduction rate of the disc-shaped particle was the fastest among all and the long cylindrical particle followed. The experimental results were analyzed by the unreacted-core model for a non-spherical particle proposed in the previous study by the authors, which was intended for the particle of the non-spherical shape relatively near to the sphere. According to the analysis, this model was applicable for the cylindrical particles of which the height are in the range from a half to twice of the cylindrical diameter while the long cylindrical-and disc-shaped particle out of the above range were not. Based on the review of the experimental-and analysis results, the reaction aspect concept for the long cylindrical-and disc-shaped particle was discussed. |
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| Key Words |
| Shape factor, Reduction rate, Iron ore, Non-spherical particle, Non-spherical radius, Unreacted-core model |
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