Application of Intra-Particle Combustion Model for Iron Ore Sintering Bed

Pingli Hou, Sangmin Choi, Won Yang, Eungsoo Choi, Heejin Kang

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DOI: 10.4236/msa.2011.25048                

Abstract

In order to quantitatively predict the behavior of the material in the packed bed, a single particle model is developed to describe the combustion and sintering process inside an individual particle composed of multiple solid material fines, including iron ore, coke and limestone, and is applied to the combustion modeling of an iron ore sintering. Byanalyzing three typical fuel distribution cases using the developed single particle combustion model, the effects of temperature and oxygen concentration gradient inside the particle on heat and mass transfer and the combustion behavior of the iron ore sintering process areinvestigated. Considering the various combustion rates which are highly dependent on the fuel distribution methods, correction factor for single particle model is also introduced and systematically analyzed. The aim of this research is to supplement particle technology to conventional approach and it is found that the oxygen concentration gradient inside the particle is significantly affected from the mixing method thereby changing the completion times of sintering process.

Keywords

Iron Ore Sintering Bed, Porous Materials, Coating, Melting, Computer Simulation

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	I. Muchi and J. Higuchi, “Theoretical Analysis of the Operation of Sintering,” Iron and Steel, Vol. 56, No. 3, March 1970, pp. 371-381.
[2]	R. W. Young, “Dynamic Mathematical Model of (Iron-Ore) Sintering Process,” Ironmaking and Steelmaking, Vol. 4, No. 6, 1977, pp. 321-328.
[3]	M. J. Cumming and J. A. Thurlby, “Developments in Modeling and Simulation of Iron Ore Sintering,” Ironmakingand Steelmaking, Vol. 17, No. 4, 1990, pp. 245- 254.
[4]	F. Patisson, J. P. Bellot, D. Ablitzer, E. Marli, C. Dulcy and J. M. Steiler, “Mathematical Modeling of Iron Ore Sintering Process,” Ironmaking and Steelmaking, Vol. 18, No. 2, 1991, pp. 89-95.
[5]	N. K. Nath, A. J. Silva and N. Chakraborti, “Dynamic Process Modeling of Iron Ore Sintering,” Steel Research, Vol. 68, No. 7, 1997, pp. 285-292.
[6]	J. Mitterlehner, G. Loeffler and F. Winter, “Modeling and Simulation of Heat front Propagation in the Iron Ore Sintering Process,” ISIJ International, Vol. 44, No. 1, 2004, pp. 11-20. doi:10.2355/isijinternational.44.11
[7]	W. Yang, C. Ryu, S. Choi, E. Choi, D. Lee and W. Huh, “Modeling of Combustion and Heat Transfer in an Iron Ore Sintering Bed with Considerations of Multiple Solid Phases,” ISIJ Interna-tional, Vol. 44, No. 3, 2004, pp. 492-499. doi:10.2355/isijinternational.44.492
[8]	S. Komarov, H. Shi-bata, N. Hayashi and E. Kasai, “Numerical and Experimental Investigation on Heat Propagation through Composite Sinter Bed with Non-Uniform Voidage: Part 1 Mathematical Model and Its Experimental Verification,” Journal of Iron and Steel Research, Interantional, Vol. 17, No. 10, 2010, pp. 1-7.
[9]	A. Dziugys and B. Peters, “An Approach to Simulate the Motion of Spherical and Non-Spherical Fuel Particles in Combustion Chambers,” Granular Matter, Vol. 3, No. 4, 2001, pp. 231-266. doi:10.1007/PL00010918
[10]	J. C. Wurzenberger, S. Wallner and H. Raupenstrauch, “Thermal Conversion of Biomass: Comprehensive Reactor and Particle Modeling,” AIChE Jour-nal, Vol. 48, No. 10, October 2002, pp. 2398-2411. doi:10.1002/aic.690481029
[11]	R. Johansson, H. Thunman and B. Leckner, “Influence of Intraparticle Gradients in Mod-eling of Fixed Bed Combustion,” Combustion and Flame, Vol. 149, No. 1, April 2007, pp. 49-62. doi:10.1016/j.combustflame.2006.12.009
[12]	W. Yang, C. Ryu, S. Choi, E. Choi, D. Ri and W. Huh, “Mathematical Model of Thermal Process in an Iron Ore Sintering Bed,” Met-als and Materials International, Vol. 10, No. 5, 2004, pp. 493-500. doi:10.1007/BF03027355
[13]	F. D. Skinner and L. D. Smoot, “Pulverized-Coal Combustion and Gasification,” Noyes Publications, Park Ridge, 1984.
[14]	M. L. Hobbs, P. T. Radulovic and L. D. Smoot, “Combustion and Gasification of Coals in Fixed-Beds,” Progress in Energy and Combustion Science, Vol. 19, No. 6, 1993, pp. 505-586. doi:10.1016/0360-1285(93)90003-W
[15]	N. Oyama, T. Hi-guchi, S. Machida, H. Sato and K. Takeda, “Effect of High-Phosphorous Iron Ore Distribution in Quasi-Particle on Melt Fluidity and Sinter Bed Permeability during Sintering,” ISIJ Intermational, Vol. 49, No. 5, 2009, pp. 650-658. doi:10.2355/isijinternational.49.650
[16]	T. Jerzy, “Coal Combust,” Krieger Publishing, Malabar, 1994.
[17]	J. Song, C. Jeon and A. Boehman, “Impact of Oxygen Diffusion on the Combustion Rate of in-Bed Soot Particles,” Energy and Fuels, Vol. 24, No. 4, 2010, pp. 2418- 2428. doi:10.1021/ef900692m
[18]	E. Kasai, W. J. Rankin and J. F. Gannon, “The Effect of Raw Mixture Properties on Bed Per-meability during Sintering,” ISIJ International, Vol. 29, No. 1, 1989, pp. 33- 42. doi:10.2355/isijinternational.29.33