Electric arc furnace for continuous charging with ferrous materials and semicontinuous tapping of molten steel
OwnerAlfredo Poloni, Gianpietro Benedetti +2inventors
InventorsAlfredo Poloni, Gianpietro Benedetti, Milorad Pavlicevic, Matteo Vittorio Losciale
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Abstract
This invention is an electric arc furnace that can be continuously charged with ferrous materials, that can continuously melt the incoming charged materials, and that can semicontinuously tap molten steel by tilting to tap one side of the furnace or another. Continuous melting and refining can occur in lateral shafts adjacent to the central melting zone, and molten steel can be tapped from either of these shafts or directly from the central melting zone if desired. The furnace can be operated and tapped continuously, which provides many distinct advantages over what is currently available in the art.
Claims37
An electric arc furnace for continuous charging of ferrous materials and semicontinuous tapping of molten steel, comprising:
- (a) a body, having a central melting zone and at least two lateral shafts adjacent to said central melting zone, the base of said central melting zone being higher in elevation than the bases of said lateral shafts;
- (b) a roof over said body;
- (c) a central stack extending vertically from said roof above said central melting zone, said central stack having a means for charging ferrous materials into said central melting zone, having a means for removing exhaust gases from said central melting zone, and having a pivot point located below said means for charging;
- (d) a means for melting material charged into the furnace;
- (e) a means for tapping molten steel from the furnace;
- (f) a means for injecting refining aids into said lateral shafts;
- (g) at least one deslagging door positioned within said body;
- and (h) a means for tilting the furnace to alternatively tap said lateral shafts.
An electric arc furnace for continuous charging of ferrous materials and semicontinuous tapping of molten steel, comprising (a) a body, having a central melting zone and at least two lateral shafts adjacent to said central melting zone, the base of said central melting zone being higher in elevation than the bases of said lateral shafts;
- (b) a roof over said body;
- (c) a central stack extending vertically from said roof above said central melting zone, said central stack having a conveyor to charge materials and a charge seal, having a pivot point located below said conveyor, having an exhaust conduit to remove exhaust gases, and having a mechanical seal to prevent gases from bypassing said exhaust conduit;
- (d) at least two electrodes disposed through said roof into said central melting zone and at least one electrode disposed through said roof into each lateral shaft;
- (e) a plurality of charging ducts disposed through said roof into said body;
- (f) a least one tapping port disposed into said base of each lateral shaft and at least one ladle positioned beneath each said tapping port;
- (g) at least one deslagging door disposed into said body;
- (h) a supersonic means for injecting refining aids disposed through said roof into said lateral shaft;
- and (i) a support element with wheels and a hydraulic actuator positioned beneath each said lateral shaft of said body.
A process for continuously charging, ferrous materials into, and semicontinuously tapping molten steel from, an electric arc furnace, comprising (a) continuously charging ferrous materials into a central stack extending from the furnace and leading into a central melting zone;
- (b) continuously melting said charged ferrous materials in said central melting zone;
- (c) intermittently tilting the furnace to pour molten steel into lateral shafts adjacent to said central melting zone;
- (d) refining molten steel in said lateral shafts;
- (e) intermittently tapping molten steel from the furnace;
- and (f) intermittently removing slag from the furnace.
Dependencies are inferred from the claim text.