The Influence of LF-VD Refining Slag on the Quality of Liquid Steel

摘要

The variation of refining slag composition during refining has been studied. The results show that (CaO) and (CaF_2) in the slag gradually decrease, (Al_2O_3), (SiO_2) and (MgO) in slag gradually increase. At the same time. the influence of refining slag on deoxidization, desulfuration and degassing has been researched. The results are as follows: sulfur distribution ratio exceeds 80 when slag basicity is between 2.3 and 3.5. The lower ferric oxide is, the higher sulfur distribution ratio is. The higher sulfur distribution ratio is, the lower oxygen content is. The lower slag index is, the higher sulfur distribution ratio is. Sulfur distribution ratio exceeds 80 when (Al_2O_3) exceeds 12