Effect of the Spatial Arrangement of MMI Desulfurization Bubble Clusters on Molten Iron Fluctuations Using the VOF Method

抄録

A two-dimensional bubble coalescence model of the desulfurization bubble group in the magnesium injection method during the rising process was established in this study. The Volume of Fluid (VOF) method accurately captures topological changes at the gas-liquid interface and the behavior of bubble jets. Additionally, it represents the splash behavior of molten iron through the gas-liquid flow field structure, bubble jet phenomena, liquid level fluctuation differences (h_f), and splash heights (h_S). The findings reveal that vertical, horizontal-vertical, and Z-shaped bubble groups exhibit two, one, and two coalescence events, respectively. The coalescence process is driven by the butterfly wake vortex. The liquid level fluctuation difference for the vertical bubble group reaches 8.53 mm, while the splash height measures 0.062 m. For the horizontal-vertical and Z types, these values are 9.11 mm, 0.059 m and 15.28 mm, 0.06 m, separately. The disturbance caused by bubbles after coalescence significantly affects the liquid surface more than bubbles that do not coalesce. Furthermore, bubble breakup at the interface exacerbates the splashing behavior of molten iron. Ultimately, the results confirm that altering the spray gun’s position and injection frequency can change the rising behavior of bubble groups, thereby reducing the splashing of molten iron.