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Modelling of multiphase flow in ironmaking blast furnace / X. F. Dong in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 214-226 Titre : Modelling of multiphase flow in ironmaking blast furnace Type de document : texte imprimé Auteurs : X. F. Dong, Editeur scientifique ; A. B. Yu, Editeur scientifique ; J. M. Burgess, Editeur scientifique Année de publication : 2009 Article en page(s) : P. 214-226 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Multiphase  flow  Ironmaking  blast  furnace Résumé : A mathematical model for the four-phase (gas, powder, liquid, and solids) flow in a two-dimensional ironmaking blast furnace is presented by extending the existing two-fluid flow models. The model describes the motion of gas, solid, and powder phases, based on the continuum approach, and implements the so-called force balance model for the flow of liquids, such as metal and slag in a blast furnace. The model results demonstrate a solid stagnant zone and dense powder hold-up region, as well as a dense liquid flow region that exists in the lower part of a blast furnace, which are consistent with the experimental observations reported in the literature. The simulation is extended to investigate the effects of packing properties and operational conditions on the flow and the volume fraction distribution of each phase in a blast furnace. It is found that solid movement has a significant effect on powder holdup distribution. Small solid particles and low porosity distribution are predicted to affect the fluid flow considerably, and this can cause deterioration in bed permeability. The dynamic powder holdup in a furnace increases significantly with the increase of powder diameter. The findings should be useful to better understand and control blast furnace operations. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800147v [article] Modelling of multiphase flow in ironmaking blast furnace [texte imprimé] / X. F. Dong, Editeur scientifique ; A. B. Yu, Editeur scientifique ; J. M. Burgess, Editeur scientifique . - 2009 . - P. 214-226. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 214-226 Mots-clés : Multiphase  flow  Ironmaking  blast  furnace Résumé : A mathematical model for the four-phase (gas, powder, liquid, and solids) flow in a two-dimensional ironmaking blast furnace is presented by extending the existing two-fluid flow models. The model describes the motion of gas, solid, and powder phases, based on the continuum approach, and implements the so-called force balance model for the flow of liquids, such as metal and slag in a blast furnace. The model results demonstrate a solid stagnant zone and dense powder hold-up region, as well as a dense liquid flow region that exists in the lower part of a blast furnace, which are consistent with the experimental observations reported in the literature. The simulation is extended to investigate the effects of packing properties and operational conditions on the flow and the volume fraction distribution of each phase in a blast furnace. It is found that solid movement has a significant effect on powder holdup distribution. Small solid particles and low porosity distribution are predicted to affect the fluid flow considerably, and this can cause deterioration in bed permeability. The dynamic powder holdup in a furnace increases significantly with the increase of powder diameter. The findings should be useful to better understand and control blast furnace operations. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800147v