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The experimental research on refining slag systems for ultra-low sulphur steel was carried out in a 10 kg induction furnace.It was proved that sulphur element in molten steel can be removed to less than 5×10~(-6) by adding CaO-Al_2O_3-SiO_2-MgO-CaF_2 slag on the surface of molten steel and feeding CaO-BaO-CaF2 wire into molten steel.And L_s,which is the coefficient of sulphur between slag and molten steel,that is ω(s)/ω[s],increases by increasing I(I = ωBaO/ωCaO).When I=5/3,L_s can be up to its maximum of 633.The CaSi is effective for deep desulphurization,especially when it is added to the slag of wire feeding.
The experimental research on refining slag systems for ultra-low sulfur steel was carried out in a 10 kg induction furnace. It was proven that sulfur element can be removed to molten steel less than 5 × 10 -6 (by CaO- Al_2O_3-SiO_2-MgO-CaF_2 slag on the surface of molten steel and feeding CaO-BaO-CaF2 wire into molten steel. And L_s, which is the coefficient of sulfur between slag and molten steel, that is ω (s) / ω [ s], increases by increasing I (I = ωBaO / ωCaO) .When I = 5/3, L_s can be up to its maximum of 633.The CaSi is effective for deep desulfurization, especially when it is added to the slag of wire feeding.