Influence of the viscosity and melting point of converter slag on its foaming behavior

Effect of Viscosity on Dynamic Evolution of Metallurgy Slag Foaming

“…During the BOF smelting process, the constant changes in the slag physical properties including viscosity, surface tension and density would cause the extensive fluctuation of the slag foaming accordingly. The BOF slag viscosity varies usually in the range 50-1 200 mPa•s or occasionally even more, 7) and is explicitly regarded as the most important factor of slag foaming among various investigated physical properties. [8][9][10] Specifically, the slag viscosity significantly affects the morphology, the motion, and the life of bubbles in the foamed slag.…”

A Novel Modeling Method of Slag Foaming in BOF

“…As a result, the high amounts of the foam splashed out of the furnace, as carried by the violent gas stream. Through the analysis of a high number of heats from actual smelting furnaces in many researches, [25][26][27] it was demonstrated that splashing would be most likely to occur at the beginning of BOF blowing. The reason is that a tremendous amount of gas would tend to be generated by the rapid reaction of the carbon-oxygen reaction at this specific period.…”

Viscosity of BOF Slag

“…All the above models start with relating the viscosity to the bridging and non-bridging oxygen atoms available in the respective oxide ion. Kozhukhov has calculated the BOF slag viscosity using the polymer model [11]. Liu et al have reviewed and critically assessed the viscosity models of heterogeneous fluids [12].…”