Uniform components, low melting point in slag Minerals, smelting shortened; the appropriate viscosity and flow of Slag can promote deoxidization and desulfurization reaction between the molten steel slag;The effect stabilized at 60% or more of desulfurization, and effectively restrain phosphorus; Effective adsorptive capacity of inclusions, be helpful for purification steel; Protection of ladle lining, prevent slag erosion; reduce dust pollution.