CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway--颗粒学报PARTICUOLOGY

Xu, P., Han, P., He, Z., An, X., Sun, K., & Gao, L. (2024). CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway. Particuology, 89, 270-278. https://doi.org/10.1016/j.partic.2023.11.009

CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway

Peng Xu^a, Peng Han ^a *, Zhijun He ^a *, Xizhong An^b, Kang Sun^a, Lihua Gao^a

a Key Laboratory of Green Low-Carbon and Intelligent Metallurgy, School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114000, China
b Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang, 110819, China

10.1016/j.partic.2023.11.009

Volume 89, June 2024, Pages 270-278

Received 20 June 2023, Revised 15 August 2023, Accepted 1 November 2023, Available online 21 November 2023, Version of Record 16 December 2023.

E-mail: hanpeng@ustl.edu.cn; hezhijun@ustl.edu.cn

Highlights

• Based on experimental data of coke reaction kinetics, coupled CFD-DEM method was used to simulate coke consumption and motion in raceway.

• The effects of inlet gas velocity and angle on the characteristics of the raceway during the blast process are systematically analyzed.

• The consumption rate and flow behavior of coke particles in the blast process were identified.

Abstract

In this study, the gas-solid flow process in the blast furnace raceway is numerically simulated using coupled computational fluid dynamics and the discrete element method (CFD-DEM). The coke reaction kinetics data are imported into the DEM model to reproduce the consumption process of each coke particle. The effects of inlet gas velocity and angle on the morphology of the raceway, coke consumption rate, coke bed temperature, and particle size distribution in the blast process are systematically investigated and analyzed. The results show that the consumption of coke particles promotes the formation of raceways during the blast process. At the same time, a coke mixture layer is produced at the edge of the raceway. The higher the inlet gas velocity, the thicker the coke mixture layer in the middle and upper parts of the raceway region, and the larger the proportion of small particles in the coke mixture layer. The effect of the inlet gas angle on the raceway region is less than the inlet gas velocity. However, with the increase in the inlet gas angle, the high-temperature region of the coke bed extends downward gradually, which is conducive to activating the hearth.

Graphical abstract

Keywords

Blast furnace; Raceway; Multiphase flow; CFD-DEM; Modeling

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