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| Number | Title | Issue Date |
| 7172640 | Method and device for melting down metal-containing materials In a method and a device for melting down metal-containing material, preferably fine-particulate metal-containing material, such as sponge iron, in a metallurgical melting furnace (1), wherein, in an interior space (11) of the melting furnace (1... | 02/06/2007 |
| 7154932 | Refining and casting apparatus A method for refining and casting metals and metal alloys includes melting and refining a metallic material and then casting the refined molten material by a nucleated casting technique. The refined molten material is provided to the atomizing nozzle of the nucleate... | 12/26/2006 |
| 6928869 | Stick for measuring the level of a molten metal bath A measurement rod for measuring the level of a liquid bath is cooled but is provided with a solid end piece so that the bath cannot solidify in front of the orifice of the measurement gas injected in the bath, for which the pressure is being measured. ... | 08/16/2005 |
| 6728291 | Melting vessels provided with a cooled bottom electrode The aim of the invention is to improve the cooling of the bottom electrodes (1) of metallurgical melting vessels. To this end, a cooling plate (5) is situated beneath the support plate (2) on which the contact elements (3) are supported. ... | 04/27/2004 |
| 6636548 | Bottom electrode structure of electric arc furnace A bottom electrode of a direct current electric arc furnace includes an electrode body extending through a hole defined in a bottom of the furnace. A circumferential flange is formed around a lower portion of the electrode body to which a ring connection ... | 10/21/2003 |
| 6614831 | Mounting arrangement for auxiliary burner or lance A mounting enclosure and an improved mounting arrangement for apparatus used in metal melting, refining and processing, particularly those apparatus adapted for steel making in an electric arc furnace, such as burners, lances and the like with supersonic ... | 09/02/2003 |
| 6485675 | Bottom for a metallurgical vessel with a direct current electric arc device A base of a metallurgical vessel having a direct-current arc device whose cathode projects into the vessel and in whose fire-resistant lining on the base at least one anode is arranged, one end of which, passing through the vessel wall, touches metallic m... | 11/26/2002 |
| 6473446 | Electric furnace for steel making An electric furnace includes a stationary lower shell having a sloping floor extending downwardly to a tap hole to always maintain a sufficient ferrostatic head three times the tap hole for slag free tapping. The configuration of the refractory for contai... | 10/29/2002 |
| 6426969 | Discharge screw for moving hearth Discharge screw (6) for a moving hearth, and in particular for an annular rotary hearth (2) of a reheat furnace for the heat treatment of loose materials, comprising a cylinder (61) arranged above and substantially radially with respect to this annular he... | 07/30/2002 |
| 6377602 | Method and device to feed premixed gas to tuyeres of electric arc furnaces Method and device to feed tuyeres in an electric furnace, the tuyeres comprising a central conduit to deliver a comburent gaseous substance and a peripheral conduit to deliver a cooling gaseous substance, the method providing to send to the central condui... | 04/23/2002 |
| 6295309 | Vacuum arc remelting apparatus and process A VAR process is conducted in an apparatus characterized by a crucible wall that provides a stable shelf anchor. The VAR apparatus includes a furnace chamber, a consumable electrode formed of a material to be remelted within the furnace chamber and a cruc... | 09/25/2001 |
| 6289035 | Mounting arrangement for auxiliary burner or lance A mounting block and an improved mounting arrangement for apparatus used in metal melting, refining and processing, particularly those apparatus adapted to steel making in an electric arc furnace, such as burners, lances and the like with supersonic oxyge... | 09/11/2001 |
| 6226312 | Device to cool and protect a cathode in an electric arc furnace Device to cool and protect a cathode in an electric arc furnace, wherein the cathode comprises at least a consumable column, a structure, hollow on the inside and containing a cooling liquid, arranged around the column and provided with a first lower cham... | 05/01/2001 |
| 6212218 | Reusable lance with consumable refractory tip An improved apparatus for EAF steelmaking providing a lance for the injection of oxidizing gas, preferably oxygen, or other metallurgical gases and particulate materials into a steelmaking process. In one embodiment, the apparatus comprises a lance body c... | 04/03/2001 |
| 6185242 | Integral side wall and tap hole cover for an eccentric bottom tap (EBT) electric furnace Spray cooled side wall and tap hole cover for an eccentric bottom tap (EBT) electric furnace which is unitary, i.e. one-piece, and has an inter-connected coolant supply and inter-connected spent coolant drain.... | 02/06/2001 |
| 6163561 | Cooled basket for steel plants Basket to manipulate scrap in cooperation with an arc furnace (11) and with means to pre-heat the scrap by means of the fumes from the fourth hole (14), the basket being able to be associated with a movable covering system (16) and including a containing ... | 12/19/2000 |
| 6137822 | Direct current arc furnace and a method for melting or heating raw material or molten material A direct current electric arc furnace for melting or heating raw material or molten material includes a refractory lined vessel for holding raw or molten material in its interior. The furnace includes at least a first top electrode. The first top electrod... | 10/24/2000 |
| 6038245 | Process for melting a charge in an electrical arc furnace Provided is a process for melting a charge in a furnace. Energy of fusion is supplied to the charge, and gases including at least one combustible gas are generated during the the melting. A post-combustion of the combustible gas is performed by injecting ... | 03/14/2000 |
| 6031861 | Electrode and cooling element for a metallurgical vessel The present invention relates to an electrode for a metallurgical vessel and to a cooling element for a wall of a metallurgical vessel. In particular, the present invention provides an electrode and a cooling element having a cavity, a device for cooling ... | 02/29/2000 |
| 5999557 | Steel making bath control This invention is directed to a method and apparatus for thermal homogenization of molten metal in a heath of a electric arc furnace for steel production. The invention addresses the problem of lack of thermal homogenization by providing a lance which dir... | 12/07/1999 |
| 5991328 | Crucible for the inductive melting or superheating of metals, alloys, or other electrically conductive materials A crucible (10) for the inductive melting or superheating of metals, alloys, or other electrically conductive materials is provided with palisades of approximately equal length, arranged vertically, parallel to, and a certain distance away from, each othe... | 11/23/1999 |
| 5946339 | Steelmaking process using direct reduction iron A method and apparatus for producing crude liquid steel using direct reduced iron as a raw material in an electric arc furnace with an acid resistant sidewall refractory lining. In order to effect the more economical melting operation, the electric arc fu... | 08/31/1999 |
| 5943360 | Electric arc furnace that uses post combustion An electric arc furnace includes a closed melting vessel and includes an opening that can be closed where metal to be molten is charged into the melting vessel. At least one electrode extends into the melting vessel and generates an electric arc and forms... | 08/24/1999 |
| 5889809 | Cooling system for electrodes in D.C. electric arc furnaces Cooling system for electrodes (11) in D.C. electric arc furnaces, the electrodes (11) comprising a part (11a) subjected to the hot environment of the furnace, this part being made of graphite in the case of a cathode and of copper in the case of an anode,... | 03/30/1999 |
| 5867523 | Electric furnace with conductive hearth An improved return path for electric current through a conductive hearth of a direct current arc furnace is provided by pressing a ring of water cooled copper blocks into the periphery of a sidewall of the hearth of the furnace, the hearth having zones of... | 02/02/1999 |
| 5850413 | Device to support and swing the hearth in an electric furnace Device to support and swing the hearth in an electric furnace, whether it be the type operating on direct or alternate current, the furnace being able to be of the channel type, EBT with the hearth lowered or not, OBT or other type, the hearth (11) cooper... | 12/15/1998 |
| 5835523 | Bottom electrode for a metallurgical vessel A bottom electrode for a metallurgical vessel operated with direct current, consisting of an outer part made of a first material arrangeable substantially outside a bottom of the vessel so as to face the vessel, and an inner part made of a second material... | 11/10/1998 |
| 5822357 | Process for melting a charge in a furnace A charge of scrap is melted in a furnace (1) with post-combustion of the fumes by injection of an oxygenated gas into the space in the furnace above the charge. During periods of post-combustion, the oxygenated gas is injected in the form of several jets ... | 10/13/1998 |
| 5809055 | Metallurgical vessel heated by direct current and having a bottom electrode A metallurgical vessel heated by direct current, particularly for the production of ferroalloys, including a metallic jacket lined with refractory material and a bottom electrode. A bottom electrode (22) is located within the interior of the vessel and ar... | 09/15/1998 |
| 5802097 | Melting method for an electric ARC furnace with alternative sources of energy and relative electric ARC furnace with special burner positioning Melting method for an electric arc furnace with alternative sources of energy for the melting of iron-based alloys, the electric furnace (10) including tuyeres (13) positioned on the bottom to deliver oxygen, at least one tuyere (15) to deliver coal dust ... | 09/01/1998 |
| 5802098 | Melting vessel with fastening, mounting and tilting devices A melting vessel plant, in which the melting vessel is a converter vessel, to which a vessel cover with a pipe connection for removing the flue gases is attached. Either an oxygen lance with an auxiliary cover or electrodes with an auxiliary cover are int... | 09/01/1998 |
| 5719897 | Furnace vessel for a direct current arc furnace In order to reduce the power loss of a direct current arc furnace the furnace vessel is only partially cooled in the region situated above the melting zone. A first cooling device is provided on a top edge of the vessel. A second cooling device is provide... | 02/17/1998 |
| 5651024 | Cooled bottom electrode for a direct current electric furnace A cooled bottom electrode for a direct-current electric furnace includes one or more steel bars incorporated in a refractory hearth of the furnace and having at least its upper end in contact with the bath of molten metal within the furnace, at least a fi... | 07/22/1997 |
| 5610935 | Method for manufacturing a base anode for a metallurgical vessel In a method for manufacturing a base anode (10) having a multiplicity of adjacently arranged metal elements (11) for a metallurgical vessel (1), the intermediate spaces (14) between the metal elements (11) are filled with refractory material (16), the ref... | 03/11/1997 |
| 5590151 | Process for melting scrap iron in an electric furnace and installation for implementing the process A direct current electric furnace for melting ferrous raw material, such a scrap iron, comprising a vessel (1) closed by a detachable cover (13), at least one consumable electrode (5) which passes through at least one opening (16) in the cover (13), at le... | 12/31/1996 |
| 5590152 | DC arc furnace Two upper electrodes 16 and 17 are horizontally spaced apart from each other with a predetermined distance and vertically extend through a furnace roof 3 of a furnace shell 2. Upper conductors 20 and 21 are connected to the upper electrodes 16 and 17 and ... | 12/31/1996 |
| 5588018 | Metallurgical container comprising a hearth bottom electrode A metallurgical container of the type having a vessel having a bottom wall and an inner refractory lining includes a hearth bottom electrode extending through the bottom wall and the lining and including, in a superposed condition, a bar and a connector. ... | 12/24/1996 |
| 5572544 | Electric arc furnace post combustion method A method for carrying out post combustion in an electric arc furnace comprising forming a preferential gas stream within the electric arc furnace, concentrating carbon monoxide within the gas stream, and providing post combustion oxygen into the gas strea... | 11/05/1996 |
| 5544195 | High-bandwidth continuous-flow arc furnace A high-bandwidth continuous-flow arc furnace for stream welding applications includes a metal mass contained in a crucible having an orifice. A power source charges an electrode for generating an arc between the electrode and the mass. The arc heats the m... | 08/06/1996 |
| 5490163 | Method of operation of a D.C. electric-arc furnace with bottom electrode and refractory part for its implementation The method relates to the operation of a D.C. electric-arc furnace provided with at least one bottom electrode including an elongated metal current-supply body passing through the hearth of the furnace and surrounded by a casing made of dense refractory s... | 02/06/1996 |
