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| Number | Title | Issue Date |
| 7547409 | Compact micro-porous media degasser A degasser (10) for molten metal with a microporous plate (11). The microporous has at least one internal passageway (13) and an interface tube (12) attached to the microporous plate in flow communication with the internal passageway.... | 06/16/2009 |
| 7384593 | Cyclone plug A gas lance made of a fireproof material, having an entry surface and an exit surface, having channels having slit-shaped cross-section, which comprise an entry slit and an exit slit. In order to provide a gas lance in which the gas exits in such a manner that a goo... | 06/10/2008 |
| 7354547 | Molten-metal transferring ladle and molten-metal tapping method A pressure tapping type ladle for transferring molten-metal includes a ladle body for containing molten metal, a top cover covering a top opening of the ladle body, and an openable working cover covering an opening formed in a part of the top cover. The ladle also i... | 04/08/2008 |
| 7276205 | Injection device and process for the injection of a fluid The invention relates to an injection device for the reliable introduction of a fluid into a metallurgical vessel having a refractory lining, the device being removably insertable in the lining; comprising a refractory first body (2) and a refractory second b... | 10/02/2007 |
| 7264767 | Method and device for reducing the oxygen content of a copper melt A process and a device serve for decreasing the oxygen content of a copper melt. One or more flushing plugs, from which a scavenging gas emerges, are arranged in the perpendicular direction in the lower region of the copper melt. The scavenging gas ascends into the ... | 09/04/2007 |
| 7198206 | Compact gassing lance A compact gassing lance including tubing having a tubing plenum and a distribution opening; a supply line operably connected to supply gas to the tubing plenum; and a screen attached to the tubing over the distribution opening and forming a screen plenum; wherein th... | 04/03/2007 |
| 7198181 | Stopper for reliable gas injection The present invention concerns a mono-block stopper adapted to deliver gas during pouring of molten metal comprising a stopper body having an internal chamber (1) and a gas discharge port (2), a bore (3) connecting the internal chamber (1... | 04/03/2007 |
| 7195662 | Device and process for producing metal foam A device for feeding gas in a melt of foamable metal by means of at least one pipe for producing metal foam. The gas insertion pipe projects inwardly into the melt and at the projecting end has a gas outlet having a cross section of 0.006 to 0.2 mm2 and a... | 03/27/2007 |
| 6951296 | Method and device for preventing slag from flowing along when tapping a molten metal The invention relates to a device for preventing slag from flowing along when tapping a molten metal out of a metallurgical vessel, whereby the tap opening of the vessel is formed out of interchangeable pipes, which are located one above the other, made of wear-resi... | 10/04/2005 |
| 6872344 | Gas blowing plug and manufacturing method therefor A gas blowing plug and a manufacturing method therefor wherein the gas blowing plug includes a slit-shaped gas passage (22) ranging from the bottom to the top of the plug. The gas passage (22) is continuous or discontinuous in a horizontal cross sectio... | 03/29/2005 |
| 6797230 | Gas stopper brick for metallurgical vessels with a sealing body that is subject to screw pressure springs This invention relates to a gas bubbler stone for metallurgical vessels having a porous, gas-permeable molded stone (1) made of a refractory material, a partial sheathing enclosing it in a gastight manner, the sheathing being made of a metal casing (2)... | 09/28/2004 |
| 6679936 | Molten metal degassing apparatus A tool or fluxing head for fluxing molten metal that comprises a fluxing gas supply line that communicates with the interior of an inverted plunger cup providing a hollow interior into which refining agents and other additives that are to be introduced in... | 01/20/2004 |
| 6669896 | Purge plug A purge plug adapted to be replaceably attached to the bottom of a lable for purging gas through a heat in the ladle. The purge plug comprises a ceramic body having at least one through gap which extends between the end faces of the body and a casing whic... | 12/30/2003 |
| 6551550 | Gas blowing plug and manufacturing method therefor A gas blowing plug and a manufacturing method therefor wherein the gas blowing plug includes a slit-shaped gas passage (22) ranging from the bottom to the top of the plug. The gas passage (22) is continuous or discontinuous in a horizontal cross section o... | 04/22/2003 |
| 6491190 | Permeable refractory nozzle and manufacturing method A permeable nozzle is made from MgO and MgO--Al2 O3 spinel and has a nonservice backpressure of about 0.5-50 psi at gas flowrates of about 5-20 liters/minute. In one embodiment, the permeable nozzle comprises about 50%-80% of about a... | 12/10/2002 |
| 6346212 | Converter A converter includes a side wall, and a tapping hole placed at the side wall to allow passage of molten steel. A refractory plug is axially spaced apart from the tapping hole with a predetermined distance. The distance between the refractory plug and the ... | 02/12/2002 |
| 6231806 | System for the injection of gasses into containers containing metals or fused alloys A system for the injection of gasses into containers containing metals or fused alloys, consisting in a device which indicates the end of the useful life of plugs or refractory parts, intended for the injection of gasses into containers containing metals ... | 05/15/2001 |
| 6129889 | Gas-flushing base for metallurgical vessels The invention concerns a gas purging bottom for metallurgical vessels, the gas purging bottom comprising a monolithic refractory ceramic lining having channels formed therein by chemical or physical processes. At their ends associated with an adjacent ves... | 10/10/2000 |
| 5945063 | Bottom blown gas blowing apparatus for molten metal ladle The present invention relates to an apparatus for supplying bottom-blown gas through a porous plug in a ladle and for molten metal refining. A gas supply pipe 3 is connected to a bottom-blowing porous plug 2 attached at the bottom of a ladle 1. An accumul... | 08/31/1999 |
| 5904894 | Rotary inert gas dispersion apparatus for molten metal treatment A rotating injector for use in the treatment of molten metal to remove impurities. Inert gas is flowed through a hollow rotary shaft having a lower gas port opening to a gas chamber surrounded by an outlet of porous material for creating micronized bubble... | 05/18/1999 |
| 5855843 | Gas sink in the form of an interstitial flushing device The invention concerns a gas-porous plug in the form of an interstitial flushing device in which the gas passage ducts are in the form of interstices. The opposite walls of the interstices are monolithically interconnected by flat bridges of refractory ma... | 01/05/1999 |
| 5846479 | Apparatus for de-gassing molten metal Argon injection nozzles are provided in a close-spaced series lengthwise along a treatment trough, in which liquid aluminum is conveyed. The gas is blown in at high Reynolds No, whereby the jets break up into small bubbles. A high average bubble populatio... | 12/08/1998 |
| 5744050 | Nozzle The present invention provides a nozzle for teeming molten metal, particularly molten steel, from a tundish or other receptacle, which nozzle comprises an inlet, an outlet, and inner and outer tubular members which define a bore through the nozzle between... | 04/28/1998 |
| 5723055 | Nozzle assembly having inert gas distributor A refractory nozzle assembly is provided that effectively prevents the accumulation of alumina deposits around its upper edge where it receives a stopper rod. The nozzle assembly includes a refractory nozzle body having an upper and a lower portion. A bor... | 03/03/1998 |
| 5622673 | Gas purging means for wall-side installation in metallurgical melting vessels The present invention pertains to a gas purging means for wall-side installation in a metallurgical melting vessel.... | 04/22/1997 |
| 5587101 | Gas injection nozzle for pouring liquid metal The object of the present invention is to provide a gas injection nozzle which is used for pouring liquid metal and which is prevented from being blocked in the course of continuous casting. According to the present invention, a gas injection nozzle for p... | 12/24/1996 |
| 5529598 | Bottom anode for a metallurgical vessel A bottom anode for a metallurgical vessel destined for producing a metal melt is formed by a metal bar provided with at least one through recess extending from outside of the metallurgical vessel as far as to within the metallurgical vessel. In order to s... | 06/25/1996 |
| 5478053 | Refractory gas purging device This invention relates a refractory gas purging device for the introduction of gases through a metallurgical vessel to molten metal therein, the device having improved wear indication, safety, and performance. In particular, the refractory gas purging dev... | 12/26/1995 |
| 5465943 | Bottom or wall structure for a metallurgical vessel A bottom or wall structure for a metallurgical vessel has a fireproof lining adjacent to an outer metallic envelope (10) of the vessel. The fireproof lining has on the side opposite to the metallic envelope (10) a wear lining (26) that is gas permeable in... | 11/14/1995 |
| 5437435 | Gas purging device The present invention pertains to a gas purging device for introducing gases and/or solid reactants into the metal melt of a metallurgical crucible, consisting of a gas purging plug, a well nozzle sleeve surrounding it, and/or a well nozzle surrounding th... | 08/01/1995 |
| 5435528 | Porous plug structure for aluminum furances A porous plug assembly for use in a vessel containing molten metal, such as a melting furnace or a holding furnace, for introducing fluxing or other gases into the molten metal. The porous plug assembly includes a frustoconical porous refractory core memb... | 07/25/1995 |
| 5431374 | Nozzle and base plate apparatus and method for use in a tundish slide gate valve A unitized nozzle and top plate assembly for use in a slide gate valve is disclosed which comprises a nozzle having porous, gas permeable walls, a top plate having an opening through its thickness for regulating a flow of molten metal, such as steel, and ... | 07/11/1995 |
| 5423521 | Ceramic plug gas distribution device An insert member including a plurality of strand members having first and second ends and being oriented in a relative spatial relationship representative of a predetermined path, first end portions for mounting the first ends of the strand members and se... | 06/13/1995 |
| 5421561 | Gas stir devices with refractory material erosion depth indicator and method of making the same A device, e.g., a stirring plug or a mono-block stirring plug and pocket block set, for introducing gas into a mass of molten metal. The devices each have a body formed of a first refractory material. The stirring plug has plural V-shaped, gas carrying sl... | 06/06/1995 |
| 5395094 | Means of conveying molten metal from one place to another in a metal-melting furnace with simultaneous alloying of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 03/07/1995 |
| 5333843 | Device for installing and removing gas purging plugs for metallurgical vessels The present invention pertains to a device for installing and removing gas purging plugs (17) for metallurgical vessels, comprising a guide (7) for axially displacing the gas purging plug (17). On the one hand, movement exactly in the axial direction can ... | 08/02/1994 |
| 5330160 | Gas stir plug wear indicator including low melting point component and method of use A gas stirring plug for introducing gas into a mass of molten metal. The plug is a generally frusto-conical shaped member which is worn away during use and which should be replaced when it has worn away to a predetermined point and comprises a shell, a co... | 07/19/1994 |
| 5312092 | Gas purging plug The present invention pertains to a gas purging plug for metallurgical vessels with a gas connection pipe at the gas inlet-side, lower end.... | 05/17/1994 |
| 5286004 | Low porosity-high density radial burst refractory plug with constant flow Apparatus including a nozzle or refractory pipe lance for the secondary refinement of a bath of molten metal by the injection of a gas under pressure, having one or more low porosity-high density refractory plugs which contain apertures of constant diamet... | 02/15/1994 |
| 5265850 | Refractory for gas blowing for molten metal refining vessel A refractory for gas blowing to be attached to an opening of a molten metal refining vessel includes a gas permeable portion comprising an alumina refractory, the gas permeable portion having a plurality of gas blowing apertures running therethrough in th... | 11/30/1993 |
