There are significant velocity gradients,temperature gradients,and sulfur concentration gradients in the molten steel at the solidification front of the slab continuous casting mold,which have a significant impact on the capture of bubbles and inclusions in the solidified shell.The velocity,temperature,and sulfur content distribution of molten steel at narrow solidification front at different heights in slab continuous casting mold using ANSYS Fluent was studied.Three cross-sections parallel to the X-direction located at the center of the crystallizer at a distance of 0.1,0.3,and 0.6 meters from the free liquid surface of the mold represent the upper,impact,and lower regions of the narrow solidification front of the mold.The velocity gradient,temperature gradient,and sulfur content gradient of the steel in the X-direction at a distance of 3 mm from the solidification front on each line were calculated and analyzed.The results show that the velocity gradient of molten steel in the lower region is the highest(14.5 s-1),slightly higher than that in the upper region(14.1 s-1),while that in the impact region is the smallest(0.4s-1);the temperature gradient of the molten steel in the lower region is the highest(902.3 K/m),which is about 2.0 times than that of the upper region and 2.4 times than that of the impact region.The sulfur content gradient in the upper region is the highest(0.42%/m),followed by the lower region(0.04%/m),and the sulfur content gradient in the impact region is the smallest(0.02%/m).The distribution of sulfur content in the molten steel has two forms of variation with increasing distance from the solidification front in the three regions:first increase and then decrease to the initial content value,and first decrease,then increase,and finally decrease to the initial content value.
continuous casting moldsolidification fronttemperature fieldsulfur content distribution
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