Method and apparatus for adding heat to molten metal

Details Method and apparatus for adding heat to molten metal Method and apparatus for adding heat to molten metal

C - Chemistry, Metallurgy

22

B

307/25, 53/356

C22B 4/08 (2006.01) F27D 27/00 (2010.01) F27D 99/00 (2010.01) C21C 1/02 (2006.01) C22B 9/20 (2006.01) F27D 3/00 (2006.01)

Patent

CA 1232765

A B S T R A C T A hollow rotating body, a rotor, of a refractory material, with holes in the bottom and the side wall, is caused to rotate immersed in molten metal. The metal inside the rotor is thus caused to rotate. As a result of this, the metal flows into the rotor from the hole in the bottom and out through the holes in the side. The metal in the rotor acquires the surface of a paraboloid of revolution. The shaft for the rotor is hollow. Through this shaft there is intro- duced a fixed electrode. With the molten metal as the other electrode, an electric arc can be struck between the fixed electrode and the paraboloid surface of the metal inside the rotor, whereby heat is imparted to the metal. The fact that the surface is continuously changing makes it comparatively simple to strike the arc with a plasma burner. The apparatus can also be used for alloying and/or refining the molten metal.

472655

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