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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7638088 | Method and device for producing pig iron and/or pig iron intermediate products Apparatus and process for producing metal products, in which a metal-containing charge material is melted in a melting unit, and a working gas, in particular an at least partially reducing working gas, is additionally produced in the melting unit. The working gas pr... | 12/29/2009 |
| 7175690 | Pre-treatment process for feed material for direct reduction process A pretreatment process for solid lump feed material for a gas and pellet/lump-based direct reduction process, comprising preheating feed material to a temperature of from about 200 C to about 500 C, without reduction, in a non-reducing atmosphere prior to charging t... | 02/13/2007 |
| 6953547 | Method and apparatus for feeding solid material and oxidizing gas into a suspension smelting furnace The invention relates to an apparatus for feeding finely divided solids, containing at least sulphidic metal concentrate, and oxygenous oxidizing gas into a suspension smelting furnace, said apparatus comprising elements for conducting solids and oxidizing gas into ... | 10/11/2005 |
| 6764642 | Shredder dust feeding device, reverberatory furnace provided with this feeding device, and furnace for burning shredder dust The present invention relates to a device for feeding shredder dust to a furnace such as a reverberatory furnace. This device comprises a feeding chute that passes to the inside of the reverberatory furnace and is fitted to the ceiling of the reverberatory furnace. ... | 07/20/2004 |
| 6565799 | Equipment for the even feed of pulverous material to a concentrate burner of suspension smelting furnace This invention relates to equipment for the feed of pulverous material to a concentrate burner of a suspension-melting furnace, so that the feed of solid finely divided material into the furnace is distributed evenly in the concentrate burner. According t... | 05/20/2003 |
| 6491864 | Plant for charging metal carriers to melt-down gasifying zone Plant for charging metal carriers which contain a portion of fines and are at least partially reduced to a melter gasifier in which a melt-down gasifying zone formed by a bed is maintained, the metal carriers and carbon carriers are fed into the melter ga... | 12/10/2002 |
| 6478846 | Method and device for injecting reducing agents in a shaft furnace The invention relates to a method for injecting reducing agents into a shaft furnace in which the reducing agent is transported within a pneumatic delivery stream to the shaft furnace according to the flowing steps; a) dividing the delivery stream into a ... | 11/12/2002 |
| 6383251 | Direct iron and steelmaking Solid state iron oxide reduction in a gas-solid reduction zone is combined with continuous melting of the hot solid reduced iron in a fuel-fired gas-solid-liquid melting zone within a rotary furnace by pneumatic transfer of the hot reduced iron by carrier... | 05/07/2002 |
| 6315943 | Apparatus for producing molten metal In a method of producing molten metal (8) from at least partially fine-particulate metal carriers in a melter gasifier (2) in which under supply of carbon-containing material and oxygen or an oxygen-containing gas under simultaneous formation of a reducin... | 11/13/2001 |
| 5968448 | Process and apparatus for producing molten pig iron A process for producing molten pig iron uses direct reduction of iron ore in a pre-reduction stage followed by a final reduction stage. In the pre-reduction stage iron ore is pre-reduced in a melting cyclone by means of a reducing process gas originating ... | 10/19/1999 |
| 5948139 | Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process In a process for the production of molten pig iron or steel pre-products from fine-particulate iron-cintaining material, in a meltdown-gasifying zone of a melter gasifier (1), under the supply of carbon-containing material and oxygen-containing gas at the... | 09/07/1999 |
| 5858302 | Apparatus for electric steelmaking A burner/injector for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector includes a liquid-cooled combustor for generating an... | 01/12/1999 |
| 5843368 | Apparatus for electric steelmaking A burner/injector for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector includes a liquid-cooled combustor for generating an... | 12/01/1998 |
| 5772955 | Apparatus for suspension smelting The invention relates to an apparatus for the suspension smelting of sulfidic, finely divided raw materials containing metals, such as copper, nickel and lead, by using oxygen enrichment. In this method into the suspension smelting furnace (1) there is fe... | 06/30/1998 |
| 5749937 | Fast quench reactor and method A fast quench reaction includes a reactor chamber having a high temperature heating means such as a plasma torch at its inlet and a restrictive convergent-divergent nozzle at its outlet end. Reactants are injected into the reactor chamber. The resulting h... | 05/12/1998 |
| 5714113 | Apparatus for electric steelmaking A burner/injector for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector includes a liquid-cooled combustor for generating an... | 02/03/1998 |
| 5700144 | Method and apparatus for thermal treatment of solids During thermal treatment in a melting cyclone of solids that yield molten products at treatment temperatures, an exhaust gas is separated from the melt in an apparatus following the melting cyclone. The separation of the exhaust gas is implemented in a cy... | 12/23/1997 |
| 5674310 | Method and apparatus for feeding reaction gas and solids The invention relates to a method and apparatus for feeding reaction gas and solids into a suspension smelting furnace, which apparatus comprises at least conduits for receiving reaction gas and solids and for further conducting them into a suspension sme... | 10/07/1997 |
| 5662860 | Apparatus for producing molten pig iron by direct reduction Apparatus for producing molten pig iron by direct reduction of iron ore, comprises (i) a metallurgical vessel, in which with supply of coal and oxygen the iron ore undergoes a final reduction with production of a process gas and said process gas undergoes... | 09/02/1997 |
| 5639293 | Method and apparatus for production of iron from iron compounds A method and apparatus for production of iron from iron compounds is provided. There is a first stage of pre-reducing the iron compounds in a first chamber having a rotationally symmetrical wall, and a second stage of further reducing the iron compounds i... | 06/17/1997 |
| 5567379 | Method of producing molten pig iron or molten steel pre-products and a plant therefor A plant is provided for producing molten pig iron or molten steel pre-products from lumpy, iron-ore-containing charging substances. The plant comprises a reduction shaft furnace for receiving lumpy, iron-ore-containing charging substances, the plant inclu... | 10/22/1996 |
| 5544868 | Blow pipe and gas lance for blast furance An improved fuel lance and blow pipe system for injecting supplemental fuel into a blast furnace includes a lance support on the blow pipe housing by use of a quick disconnect coupling for releasably coupling the lance to the blow pipe and accurately fix ... | 08/13/1996 |
| 5472478 | Reduction of metal oxides and vessel A method of reducing metal oxides in a vessel containing a molten bath, the bath comprising a metal layer and a slag layer, wherein metal oxides and carbonaceous material are introduced into the bath, gas is injected into the slag layer to case the erupti... | 12/05/1995 |
| 5451034 | Device for the injection of pulverized coal into a blast furnace crucible A method and device is provided for the combined injection of pulverized coal and a gaseous oxidant into a crucible of a shaft furnace, especially a blast furnace, through a hot-air blast tuyere. In the region of the nozzle end of the tuyere in the crucib... | 09/19/1995 |
| 5445363 | Apparatus for the pneumatic transport of large iron-bearing particles In method and apparatus for producing iron and steel from iron cores largely composed of iron oxides, wherein a direct reduction process is used to produce a solid particulate intermediate product, generally known as sponge Iron or Direct Reduced Iron (DR... | 08/29/1995 |
| 5427604 | Alloy material addition method and apparatus for smelting and melting furnaces A method and apparatus for feeding alloy additive and burden materials to the burden in a vertical shaft furnace working volume generally by gravity-feeding the alloy additive to the furnace tuyere for entrainment in the blast media and transfer to the bu... | 06/27/1995 |
| 5370369 | Multipurpose burner designed for adjusting the supply of a reaction gas to be fed into a smelting furnace The invention relates to a method for feeding a reaction gas, such as oxygen or oxygen-enriched air to a flash smelting furnace through a concentrate burner, so that the gas is fed in around a pulverous material distribution channel located in the middle ... | 12/06/1994 |
| 5362032 | Apparatus for feeding gases into a smelting furnace The present invention relates to a method and apparatus for feeding reaction gases, advantageously oxygen and air or a mixture thereof, into a smelting furnace so that the cross-sectional area wherethrough the reaction gases are fed can be adjusted. Thus ... | 11/08/1994 |
| 5358222 | Apparatus for oxidizing pulverous fuel with two gases having different oxygen contents The invention relates to a method for oxidizing the pulverous fuel of a furnace, advantageously a flash smelting furnace, by means of a burner, so that the oxidation takes place mainly owing to an effective mixing of two different combustion gases, pulver... | 10/25/1994 |
| 5282883 | Method and apparatus for the high-temperature treatment of fine-grained solids in a melting cyclone A method and apparatus for high temperature treatment of particulate metal ore concentrate solids with a cyclone having a tangentially positioned burner directing a jet flame into the cyclone, an ore injecting nozzle positioned to inject a stream of ore w... | 02/01/1994 |
| 5228901 | Partial reduction of particulate iron ores and cyclone reactor A closed-cover hot cyclone reactor is used to melt and partially reduce particulate iron or ferro-alloy ores fed to it in a stream. Tangential streams of fuel gas or, preferably, producer gas supplied by an associated bath smelter, interact with the spira... | 07/20/1993 |
| 5227117 | Apparatus for blast furnace fuel injection A blast furnace blowpipe is provided having multipe bosses for a plurality of fuel injection lances spaced around the periphery of the blowpipe.... | 07/13/1993 |
| 5173245 | Tuyere injector An injector for introducing particulate material into the bath of a pyrometallurgical vessel via existing tuyeres. An existing mechanical puncher may be removed and replaced with an injector adapted to be attached to the existing tuyere body so as not to ... | 12/22/1992 |
| 5060913 | Integrated metallurgical reactor A smelting reduction process is carried out in a smelting reactor which includes a central internal carburization/combustion plenum or chamber in which hot metal is carburized by the injection of coal fines and heated by post combustion of the coal gases.... | 10/29/1991 |
| 5050848 | Apparatus for post combustion Process and apparatus for post combustion of reaction gases generated in a molten iron bath above the bath by means of at least one jet of oxidizing gases, whereby energy thereby produced is transferred to the bath and whereby the or each jet of oxidizing... | 09/24/1991 |
| 4995906 | Method for smelting reduction of iron ore A method for smelting reduction of iron ore, comprises the steps of: introducing iron ore into a preheat and prereduction furnace and preheating and prereducing the iron ore, a prereduction degree being less than 30%; charging the iron ore, carbonaceous m... | 02/26/1991 |
| 4921532 | Ironmaking by means of a smelting shaft furnace A method of ironmaking by means of a smelting shaft furnace including the steps of supplying iron ore and coke to the top of the furnace; and injecting coal and oxygen into the smelting zone of the furnace to promote combustion, to control reaction temper... | 05/01/1990 |
| 4919396 | Apparatus for smelting meltable substances, particularly ore concentrates An apparatus for smelting meltable substances, particularly ore concentrates. A transfer element joins the cyclone discharge to the furnace and is arranged between the melting cyclone and the furnace. In this way, the fitting, particularly the re-fitting ... | 04/24/1990 |
| 4915731 | Metallurgical method and apparatus Method and apparatus for recovering a metal from an ore by kinetic metallurgy as distinct from the usual static blast furnace approach.... | 04/10/1990 |
| 4880605 | Gas dispersion shroud for high temperature processing of powders Apparatus is disclosed for reacting a powder with a gas comprising a shroud consisting of a first section having a peripheral cylindrical wall with inner surface and outer surface. Inner surface defines a cavity which serves as reaction chamber in which p... | 11/14/1989 |
