One for slagging agent and preparation method of high phosphorus semisteel Dephosphorization

The present invention is a suitable fluxing agent and preparation method of high phosphorus semi-steel dephosphorization. Mass percentage of the chemical composition of slagging agents: CaO20% ~ 35%, MgO5 ~ 10%, FeO≥10%, Al2O34% ~ 10%, SiO210% ~ 20%. High phosphorus semi-steel slag dephosphorization agent of the present invention may promote high phosphorus steel top half fast when blown into dephosphorization steelmaking slag, through the "double slag" elemental phosphorus weight content of 0.25% -0.80 % of semi-steel high-phosphorus, dephosphorization to 0.035% or less, for a high phosphorus vanadium ilmenite comprehensive utilization of mineral resources to solve the tensions, reduce production cost and user cost of steel has a very important significance.