Abstract
The coupled Eulerian-multifluid VOF-granular flow model was built to simulate gas–liquid-particle three-phase flow in a 120-ton steelmaking converter with bottom powder injection. Particle transport phenomenon and wall scouring behavior is investigated, and effect of bottom-blowing parameters on particle volume fraction and velocity distribution and wall sheer stress are evaluated. Experimental data measured were compared with simulation results to verify accuracy of simulation results, and particle motion and phase interfaces shape are predicted satisfactorily well. Results show that bottom-blowing parameters have a significant influence on particle transport behavior. Increase of powder mass rate contributes to increase of particle velocity, but aggregation of particles occurs at higher powder mass rates. As powder mass rate increases, wall scouring is aggravated. Reduction of particle diameter facilitates the uniformity of particle distribution and weakens the wall scouring. Increase of bottom blowing flow rate improves particle distribution range and accelerates particle velocity, but aggravates wall scouring. Effect of powder injection on scouring of furnace and bottom walls are higher than that of other walls. Bottom injection powder observably increases the mechanical wear of bottom wall. Combined with analysis of simulation results, it is proposed that conditions favorable to powder injection process should be particle diameter not greater than 0.15 mm, particle mass rate not greater than 1.083 kg/s, and bottom blowing flow rate not less than 160 Nm3/h.
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This work was supported by the National Natural Science Foundation of China (No. U20A20272) and the Fundamental Research Funds for the Central Universities, NEU, (No. N2025017).
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Zhang, J., Lou, W. & Zhu, M. Numerical Simulation of Particle Motion and Wall Scouring Behavior in Steelmaking Converter With Bottom Powder Injection. Metall Mater Trans B 54, 3031–3048 (2023). https://doi.org/10.1007/s11663-023-02886-2
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DOI: https://doi.org/10.1007/s11663-023-02886-2