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Bambauer, F.; Wirtz, S.; Scherer, V.; Bartusch, H.
Powder technology, 07/2018, Volume: 334Journal Article
A numerical investigation of gas and solid flow as well as the liquid accumulation in a scaled Blast Furnace (BF) model was carried out using the discrete element method (DEM) coupled with computational fluid dynamics (CFD). This three dimensional simulation considers the interaction of the solid flow of a layered burden column with the counter flowing process gas. The influence of the cohesive zone is modeled by a material dependent permeability, the molten iron and the slag are considered as one additional liquid phase in the hearth. The method used is compared with a two dimensional numerical slot model presented in former publications by Zhou et al. and then applied to a different three dimensional setup. The comparison of the models exhibits considerable differences concerning the general multiphase flow behaviour. Moreover, it is shown that three dimensional models are required to correctly resolve the actual spatial flow structure and its influence on the shape of the coke free region in the hearth. Finally, the three dimensional model is used to show the influence of the liquid discharge on the stress distribution along the walls. Snapshot of gas and solid flow pattern in a scaled three dimensional Blast Furnace model. Display omitted •Three dimensional DEM-CFD modeling of a scaled blast furnace model.•Comparison of the model with previous publications.•The impact of different liquid levels on the particle arrangement in the lower part is investigated.•Effect of simplified liquid iron discharge is shown.
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