Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7611563 | Multifunction injector and relative combustion process for metallurgical treatment in an electric arc furnace A multifunction injector (10, 11, 12) comprising a De Laval nozzle (20) adapted to act as a burner at subsonic or supersonic speed, combined with a plurality of nozzles (31, 32) for fuel and comburant respectively, arranged in two rings, concent... | 11/03/2009 |
| 7591876 | Injection of solids into liquids by means of a shrouded supersonic gas jet A method of introducing a solid particulate reagent into a bath of metallurgical liquid comprises a step of introducing a solid particulate reagent into a main supersonic gas jet. The main supersonic gas jet is directed at the surface of the bath and is surrounded w... | 09/22/2009 |
| 7297180 | Method for operating a vacuum vessel with a coherent jet A method for operating a vacuum vessel with a coherent jet wherein vacuum conditions are established within the vessel and an anchored or attached flame envelope resulting from subsonic velocity fuel and oxidant is provided around at least one supersonic gas stream.... | 11/20/2007 |
| 6514310 | Process for injection of a gas with the aid of a nozzle The electric arc furnace is equipped with a supersonic injector comprising a so-called Laval nozzle arranged at a certain distance above the bath. The dimensions of the nozzle are calculated as a function of the desired flow rate of oxygen and the desired... | 02/04/2003 |
| 5961159 | Quick-coupling part arrangement A first quick-coupling part can be brought into interaction with a second quick-coupling part via an interaction portion. The quick-coupling parts are held together with locking members. The interaction portion is designed with a surface layer which bring... | 10/05/1999 |
| 5902372 | Process and apparatus for processing a shredder light fraction in a melt A process and apparatus for processing a shredder light fraction including multi-duct nozzle having at least an end section positionable within a metallurgical vessel containing a molten metal bath. The shredder light fraction may be fed into the molten m... | 05/11/1999 |
| 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 |
| 5814125 | Method for introducing gas into a liquid A method for introducing gas into a liquid wherein a gas stream is ejected from a lance spaced above the liquid surface and directed from the lance onto the liquid surface. The gas retains substantially all its original jet axis velocity when it contacts ... | 09/29/1998 |
| 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 |
| 5444733 | Electric arc furnace with alternative sources of energy and operating method for such electric furnace Electric arc furnace with alternative sources of energy, which functions with direct current or alternating current and comprises at least one lance (12) to inject pure or combined oxygen above the bath (16) and a plurality of tuyeres (13) positioned in t... | 08/22/1995 |
| 5431709 | Accretion controlling tuyere A tuyere for refining molten metals or melting metal scrap or oxides charged into a vessel. The tuyere comprises three concentric pipes of copper or stainless steel encased in refractory. An annular stream of natural gas surrounds an annular stream of oxy... | 07/11/1995 |
| 5417740 | Method for producing steel A method of steelmaking in an at least partially refractory lined furnace. The process includes the steps of retaining a portion of a hot liquid slag from a previous heat, and altering the retained slag with basic slag forming material to increase its bas... | 05/23/1995 |
| 4575394 | Metallurgical processes The invention relates to various energy saving measures for use in the smelting, refining and melting of metals, and in particular in the manufacture of steels, alloy steels and ferrous alloys. In such processes fuel consumption is reduced and efficiency ... | 03/11/1986 |
| 4497656 | Steel making method A method of producing steel from ferrous hot metal containing carbon includes the steps of delivering oxygen and a surrounding sheath of hydrocarbon shielding fluid to the metal and beneath its surface to elevate the temperature to at least 1350° C. Iron... | 02/05/1985 |
| 4450005 | Metal refining method In a method of refining a metal by blowing a refining gas surrounded by a cooling gas into the melt of the metal to be refined using a concentric multi-tube system nozzle situated beneath the surface of the melt in a refining vessel, the improved metal re... | 05/22/1984 |
| 4409024 | Top-and-bottom blown converter steel making process In the top-and-bottom blown converter steel making process, a process is provided wherein the position of the bottom-blowing tuyeres is set such that the maximum X0 among the distances X between the respective tuyreres and the center of the con... | 10/11/1983 |
| 4405365 | Method for the fabrication of special steels in metallurgical vessels The device consists of a retractible tuyere which can be used with different types of steel melting furnaces, or any other metallurgical vessel. Said tuyere is introduced in the liquid steel bath to make the controlled refining of the same by means of gas... | 09/20/1983 |
| 4401466 | Process for protection of nozzles and refractory lining of a vessel for refining molten metal A process for protecting oxygen injection nozzles and the surrounding refractory lining of a molten metal refining vessel having such oxygen injection nozzles beneath the bath surface. The injection nozzle comprises at least three concentric pipes, the ce... | 08/30/1983 |
| 4394165 | Method of preliminary desiliconization of molten iron by injecting gaseous oxygen The present invention provides a method for preliminary treatment of molten iron from a blast furnace wherein only desiliconization of the iron is effected. Gaseous oxygen is injected into the molten iron by controlling its supply rate depending on the Si... | 07/19/1983 |
| 4385753 | Tuyere for the simultaneous and separate introduction of at least one gas and one powder material Tuyere for the processing of metals in the liquid, solid or pasty state, and capable of introducing simultaneously and separately a gas and a powdered material. The tuyere comprises at least two well-centered concentric tubes, the gas being introduced int... | 05/31/1983 |
| 4365992 | Method of treating ferrous metal A method of treating ferrous metal includes the steps of containing in a metallurgical vessel a quantity of ferrous metal which is at least partially solid in form, entraining finely divided carbon and a fluxing agent in a nonoxidizing gas and injecting t... | 12/28/1982 |
| 4356035 | Steelmaking process Oxygen is introduced onto the surface of a molten ferrous metal through at least one water-cooled lance disposed above the melt surface while an oxygen free gas in which is entrained ground solids is intermittently introduced into the molten ferrous metal... | 10/26/1982 |
| 4348227 | Process for producing steel with low hydrogen content in a through-blowing oxygen converter In a process for the production of steel with low hydrogen content in a through-blowing oxygen converter with nozzles arranged below the bath surface in the refractory brick lining, the nozzles composed of concentric pipes for introducing oxygen sheathed ... | 09/07/1982 |
| 4336064 | Method of improving the performance of submerged oxygen injectors In the injection of oxygen through a refractory lined wall into a molten metal, for example, pig iron, the injected oxygen is surrounded by a stream of a protective fluid to diminish erosion of the refractory lining; the velocities of the oxygen and prote... | 06/22/1982 |
| 4334921 | Converter steelmaking process An improved converter steelmaking process that achieves a great increase in the refining capability of top-blown oxygen is provided. The process applies to an oxygen top-blowing converter that also permits bottom blowing of gas and it is characterized by ... | 06/15/1982 |
| 4330326 | Method and a means for introducing close-grained carbonaceous fuels into a molten iron bath A method and a means for introducing close-grained carbonaceous fuels, which are suspended in a carrier gas, and oxygen into a molten iron bath are described. In this method the fuel and the oxygen can be alternately introduced through the same introducti... | 05/18/1982 |
| 4329171 | Steel making method A method of producing steel from ferrous hot metal containing carbon includes the steps of delivering oxygen and a surrounding sheath of hydrocarbon shielding fluid to the metal and beneath its surface to elevate the temperature to about 1350° C. Pelleti... | 05/11/1982 |
| 4302244 | Steel conversion method A steel conversion method includes the steps of delivering a first quantity of oxygen and a surrounding sheath of hydrocarbon shielding fluid beneath the level of a quantity of molten ferrous metal or bath contained in a vessel by means of bottom tuyeres ... | 11/24/1981 |
| 4272286 | Metallurgical vessel A metallurgical vessel has releasably coupled, semicylindrical upper and lower sections arranged such that the axis of revolution of one section lies in a plane normal relative to the rotational axis of the other. The dimension of each section in the axia... | 06/09/1981 |
| 4261551 | Method and means for supplying nozzles with gaseous and/or liquid hydrocarbons The invention describes a method and a means for supplying nozzles comprising concentric pipes with gaseous and/or liquid hydrocarbons in which oxygen or oxygen-containing gases are simultaneously introduced into a converter. In so doing, the gases and/or... | 04/14/1981 |
| 4225341 | Refining iron in a converter Molten iron is refined in a converter whose bottom has tuyeres with coaxial ducts. An oxidising gas such pure oxygen is blown through the inner duct while a protective fluid such as a hydrocarbon is blown through the outer duct. During tipping of the conv... | 09/30/1980 |
| 4200453 | Process for the production of nickel alloys The process for production of a nickel alloy having a maximum sulphur content of 0.05% in a converter by treatment of a crude ferro-nickel melt having a sulphur content of about 0.10% to 0.50% with oxygen and lime to form a slag and removal of the slag is... | 04/29/1980 |
| 4198230 | Steelmaking process A steelmaking process is described in which solid sources of iron (e.g. scrap) are charged into a convertor equipped with tuyeres through which air, oxygen or mixtures thereof can be blown into the convertor. The process includes (1) a preheating phase in whic... | 04/15/1980 |
| 4195985 | Method of improvement of the heat-balance in the refining of steel In the method of producing steel in a converter equipped with tuyeres that are shrouded with a protective medium which are disposed below the melt surface, oxygen is also introduced above the melt during at least a major part of the refining time with suf... | 04/01/1980 |
| 4192675 | Process for decarburizing ferro-manganese Ferro-manganese is decarburized from a carbon content of as high as 7.5% down to 2% or less by blowing an oxidizing gas into the melt in two stages through one or more immersed tuyeres protected with a peripheral fluid introduced into said tuyeres, utiliz... | 03/11/1980 |
| 4165980 | Method of rapidly decarburizing ferro- alloys with oxygen The invention relates to a method of rapidly decarburizing a high-carbon ro-alloy with oxygen for avoiding an undesirable oxidation of the principal alloying elements, especially chromium or manganese, comprising blowing an oxidizing gas under the surfac... | 08/28/1979 |
| 4139370 | Method of refining ferro-alloys A ferro-alloy, namely ferrochrome or ferromanganese, is refined by being heated to at least 100° C above its melting point to form a bath whereupon oxygen is blown into the melt, below the bath surface, within a protective gas envelope. The rate of oxyge... | 02/13/1979 |
| 4139368 | Metallurgical method A method of treating ferrous metal in a metallurgical vessel having a plurality of two-pipe tuyeres extending generally upwardly through the vessel bottom and in spaced apart relation relative to each other. A flux, such as line, is first blown into the f... | 02/13/1979 |
| 4123259 | Method for supplying thermal energy to steel melts A procedure is described for supplying thermal energy to a steel melt by burning a fuel in a melt containing at most 0.10% carbon, by means of oxygen. Both the fuel and the oxygen are introduced into the steel melt beneath the surface of the melt. The met... | 10/31/1978 |
| 4093452 | Refining liquid metal A method and apparatus for treating a bath of liquid iron or steel by submerged injection of a gas or gas-entrained particulate re-agents. Injection is through a tuyere occludable either by a stopper rod assembly or by a sliding gate valve and the bath tr... | 06/06/1978 |
