Abstract: Apparatus for melting metal material comprising a container for metal material, by way of example, but not limited to, metal scrap, DRI, cast iron, supplied in an electric arc-type melting furnace, and a plurality of electrodes to melt the metal material, which can be inserted in said container.
Abstract: The invention relates to a furnace and a method for electroslag remelting, wherein the furnace (37) comprises a base frame (38), wherein the base frame comprises supports (39) which bear a furnace head (41), wherein at the furnace head, an electrode can be disposed, wherein the electrode can be melted on in a crucible disposed below the furnace head, wherein the furnace comprises a transformer (42) which can supply electric power for melting on the electrode, wherein the transformer is fixedly disposed at the transformer.
Abstract: The electrode arrangement uses vertically oriented electrodes with side wall contacts for an electrothermic smelting furnace for aluminum production. The side wall contacts are radially moveable into the furnace to compensate for wear on the contacts. The side wall contacts can be hollow to allow a slag forming charge to be fed to the furnace.
Type:
Grant
Filed:
August 23, 2003
Date of Patent:
December 27, 2005
Assignee:
Alcoa Inc.
Inventors:
Jan Arthur Aune, Jon Christian Brinch, Kai Johansen
Abstract: A bottom pour electroslag refining system refines raw material into refined liquid metal. The bottom pour electroslag refining system comprises an electroslag refining crucible; a slag; a bottom pour structure that comprises an orifice from which refined liquid metal from the electroslag refining crucible can flow as a stream of refined liquid metal; and a current path. The current path is defined in the bottom pour electroslag refining system for applying current to the raw material for melting and refining the raw material. The melted and refined raw material forms a refined liquid metal pool in the electroslag refining crucible. The current that is applied by the current path is sufficient to provide the refined liquid metal in the refined liquid metal pool with a viscosity under which the refined liquid metal can flow through the orifice under its own viscosity.
Type:
Grant
Filed:
February 23, 2000
Date of Patent:
February 26, 2002
Assignee:
General Electric Company
Inventors:
William Thomas Carter, Jr., Mark Gilbert Benz, Felix Guenter Muller, Franz Waldemar Hugo, Robert John Zabala, Bruce Alan Knudsen
Abstract: Controlled current feed device for electric arc furnace employed to melt metals, wherein the feed line comprises at least a medium tension bar (13), a feed control device and a transformer (17) serving the furnace, the feed control device (16) being arranged between the medium tension bar (13) and the transformer of the furnace (17) and comprising a mutual inductor (19) consisting of a primary coil (19a) and a secondary (19b) coil, the primary coil (19a) being arranged in serial connection on the feed line (10) and the secondary coil (19b) being connected to at least a re-phasing filter (20) comprising at least a condenser (22).
Type:
Grant
Filed:
July 22, 1999
Date of Patent:
December 5, 2000
Assignee:
Centro Automation SpA
Inventors:
Ferruccio Della Vedova, Gianni Gensini, Riccardo Fragiacomo
Abstract: An electroslag remelting furnace includes a liquid-cooled, open-ended mold supported by a bottom plate of high electric conductivity, for instance, formed of copper, which closes the mold at one of its ends. The mold has a plane of symmetry which contains a mold axis. At least one conductor connects at least one terminal located at the bottom plate to a source of electric current. Furthermore, the mold has a normal plane extending normally with respect to the symmetry plane which contains the mold axis. The electric conductor extends from a marginal zone on one side of the bottom plate to the terminal on the other side of the bottom plate beyond the normal plane.
Type:
Grant
Filed:
November 3, 1982
Date of Patent:
October 2, 1984
Assignee:
Vereinigte Edelstahlwerke AG (VEW)
Inventors:
Helmut Glauninger, Heimo Jager, Peter Machner, Albert Preiner