The Study of the Ventilation Influence to Gas-Based Direct Reduction Shaft Furnace Flow Field

Abstract:

Direct reduced iron (DRI) shaft furnace flow field has important influence to the DRI production process, and the ventilation is a key factor for the velocity and pressure distribution of the gas flow in the furnace. At present works, the direct reducing gas velocity distribution and pressure distribution of DRI shaft furnace were studied with different ventilation. By the analysis of numerical simulation, the result was found that the direct reducing gas velocity increase with height in the shaft furnace reduction section. The velocity of the direct reducing gas augment with the increase of ventilation. The direct reducing gas pressure add with increasing height in the shaft furnace reduction section. With ventilation increasing, the pressure of the shaft furnace ventral part increase, and the pressure gradient increase in the direction of height in the DRI shaft furnace.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 2990-2993
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.2990
• Online since: September 2013
• Authors: Ming Hua Bai*, Jun Li Ge, Ying Min Piao, Jian Wang, Yuan Xiang Fu, Kuan Xu
• Keywords: Gas-Based DRI Shaft Furnace, Numerical Simulation, Pressure Distribution, Velocity Distribution, Ventilation

References

[1] G. Wei, Q.J. Zhao, W.X. Dong, Z.Q. Wang, Present status and development trends of world direct reduction processes, J. Chi. Metall. 9(2004) 17.

[2] J. Fang, S.J. Hao, Z.G. Li, H.S. Yin, W.F. Jiang, J. Liang, The non-blast furnace ironmaking technology and theory, first ed., Z.G. Wang, Beijing, (2002).

[3] J. LI, H.H. Zhang, H.J. Hu, H. Dong, Research on resistance characteristics of pellet shaft furnace. J. Ind. Furn. 32(2010) 1.

[4] Z.H. Khan, P. David, Liquid–vapour fronts in porous media: Multiplicity and stability of front positions, J. Int. J. Heat Mass. 61(2013)1-17.

DOI: 10.1016/j.ijheatmasstransfer.2013.01.068

[5] Y.Q. Li, H. Chen, Y.S. Zhou, X.W. Li, Q.S. Gan, B.Q. Chen, Reserarch and development of BL direct reduction process, J. iron steel. 34(1999) 6.

[6] G.L. Qing, L. Ma, X.S. Zhang, J.L. Zhou, Kuwabara. M, Numerical investigation of gas flow through blast furnace shaft with designed layered structure of ore and coke burdens, J. Ironmaking Steelmaking. 37(2010) 546.

DOI: 10.1179/030192310x12706364542867

[7] J. Bear, The theory of fluid dynamics in porous media, second ed. J.S. Li, C.X. Chen, Beijing, (1983).