Abstract
AbstractThe thermophysical properties of premelted slag and synthetic slag were measured under laboratory conditions. The tests of liquid steel desulfurization using CaO‐Al2O3‐SiO2‐MgO series premelted slag and a synthetic slag have been carried out with a MoSi2 electric resistance furnace. It was shown that the former had better desulfurization capacity than the latter. Thus, the premelted slag was chosen to be the desulfurizer for RH‐KTB refining. A plant trial at a 250 ton RH‐KTB unit used the premelted slag as desulfurizer and the average initial sulfur content in steel was 41.9 × 10−6. The results showed that the mean sulfur content in steel at the end of RH‐KTB refining had decreased to 30 × 10−6, the lowest sulfur content was 22 × 10−6, and the mean desulfurization efficiency was 28.1%.
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