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CFD-DEM simulation of raceway size and mechanical characteristics of industrial scale blast furnace

Gao Yuzhen, Chan Choon Kit

Polish Journal of Chemical Technology

2023

Vol. 25, nr 3

71--78

The raceway plays a crucial role in ensuring the stable functioning of the ironmaking blast furnace. It is the key site where the chemical reaction of coke combustion takes place, providing the necessary heat and reducing gas for the upper iron ore reduction process. Consequently, the size of the raceway serves as an essential indicator of the blast furnace’s operational condition. In this study, a mathematical model for the raceway of an industrial-scale blast furnace was established. Extensive innovation investigations were conducted to explore the characteristics pertaining to the raceway’s size. The simulation outcomes demonstrate that both the particle size and the inlet velocity exert significant influences on the raceway dimensions. Specifically, the height of the raceway is predominantly affected by the particle size, whereas the inlet velocity predominantly influences the depth of the raceway.

Numerical simulation of the particle settling in a Bingham fluid using the two-way coupling CFD-DEM scheme

Casarin Joviano Janjar, Franco Admilson Teixeira, Germer Eduardo Matos, Pivovarski Roderick Gustavo

Journal of Theoretical and Applied Mechanics

2022

Vol. 60 nr 3

409--422

The computational fluid dynamics coupled with the discrete element method is widely employed to simulate particle-fluid interactions in solid-liquid flows. The restrictions imposed by the CFD-DEM scheme to very fine meshes contribute to a scant amount of numerical results of particle settling in viscoplastic fluids. This paper presents the two-way coupling CFD-DEM simulation of the particle sedimentation in a quiescent Bingham fluid. The results for terminal particle velocity showed good agreement with the experimental data. Owing to the viscoplastic behavior of the fluid, low values of the relaxation parameter of the solid-phase must be specified to obtain accurate results.