Smelting method with functions of protecting furnace against slag splashing and converter steelmaking

The invention discloses a smelting method with functions of protecting a furnace against slag splashing and converter steelmaking. Molten iron is desulfurized, and the desulfurized molten iron is smelted according to the following method of, during blowing and slagging in a converter, adding a mixture of lime and limestone into the desulfurized molten iron under an oxygen blowing condition for blowing and slagging; and after blowing and slagging, adding limestone into the converter again under the nitrogen blowing condition to carry out slag splashing protecting furnace, wherein the time of the slag splashing protecting furnace is 5-10 minutes. According to the smelting method, the limestone is used for replacing part of lime for slagging, so that the raw material cost can be reduced, thecoal gas recovery amount can be improved; the conventional furnace repairing frequency can be greatly reduced by utilizing high-magnesium limestone adhesion, and the furnace material consumption of the repairing furnace can b