PURPOSE: To blow automatically oxygen into an electric furnace without danger in the stage of feeding plural oxygen-blowing pipes to the inside of the electric furnace by attaching the oxygen-blowing pipes to the lifting base and tilting base on a moving carriage.

CONSTITUTION: A lifting base 10 which is moved upward and downward along a guide rod 9 by a lifting device 8 is provided on a carriage 1 which can be moved to the side of an electric furnace by wheels 6, 7 in the stage of blowing gaseous oxygen into the molten steel in said furnace and refining the molten steel by decarburization. A base 11 tiltable around a fulcrum 12 is attached on the base 10 and rollers 18 grasping plural pieces of oxygen-blowing pipes are provided on the surface thereof. The carriage 1 is approached to the electric furnace and the base 10 is moved upward and downward according to the height, etc. of the electric furnace. The oxygen-blowing pipes are fed at a required angle into the molten metal in the electric furnace by the tilting of the base 11. The oxygen-blowing pipes which are burned and consumed by oxygen blowing are automatically fed into the furnace by the revolution of the rollers 18. The oxygen-blowing operation is accomplished with a small number of workers without danger.