| Title |
Effect of Iron Ore Shape on Gaseous Reduction Rate |
| Authors |
강흥원(Heung Won Kang); 김행구(Hang Goo Kim); 정우창(Uoo Chang Chung); 정원섭(Won Sub Chung) |
| Keywords |
Shape factor; Reduction rate; Iron ore; Non-spherical particle; Non-spherical radius; Unreacted-core model |
| 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. |