Method for blowing argon outside VD furnace

The invention relates to the technical field of metallurgical converter refining, in particular to a VD furnace external argon blowing method which comprises the steps that after VD furnace refining of a molten steel tank is completed, the molten steel tank is conveyed out of a VD furnace, so that the other molten steel tank can enter the VD furnace; and argon is blown into the molten steel tank at the corresponding flow according to the set pressure and the different types of steel conveyed out of the VD furnace in the molten steel tank. According to the method, argon blowing can be conducted outside the VD furnace, so that subsequent molten steel does not need to wait for argon blowing of the previous molten steel in the VD furnace and then enters the VD furnace, the subsequent molten steel can be fed into the vacant VD furnace when argon blowing of the previous molten steel is conducted outside the VD furnace, and the production efficiency is improved; and the argon flow is controlled according to differen