Effect of White Mud Addition on Desulfurization Rate of Molten Steel

Abstract Fluorspar (CaF 2 ) is commonly used to control the fluidity of slag in ladle-refining steel. However, because it desirable reduce CaF consumption its environmental impacts, industrial waste material such as white mud (WM) was investigated a potential substitute for fluorspar. Steel sample (Fe-0.3C-0.9Mn-0.3Si-0.03Al-0.05S, mass pct) melted high-frequency induction furnace, followed by additions ladle (CaO-Al O 3 -SiO -5MgO- x , CaO/Al =3, = 0 10 and fluxing agent at 1823 K (1550 °C). The desulfurization experiments were carried out reducing content increasing addition WM. Ladle with added WM showed an overall transfer coefficient sulfur ( k equivalent or higher than that conventional pct -containing slag. In melting experiment based on DIN 51730 standard, rate mixed increased amount added, which considered have positive effect initial rate. addition, adding provided sulfide capacity Consequently, use yielded having $$k_{{\text{O}}}$$ k O thus, shows promise partial replacement