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| Number | Title | Issue Date |
| 7425230 | 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... | 09/16/2008 |
| 7317502 | Liquid crystal panel with improved chromaticity and brightness A liquid crystal panel comprising a plurality of pixels arranged in a matrix. Each pixel comprises a red sub-pixel, a green sub-pixel, a blue sub-pixel, and an auxiliary sub-pixel with a transflective area. ... | 01/08/2008 |
| 7098167 | Guard bed containing lead compounds upstream of a bed of copper-containing catalyst to prevent its contamination by chlorine and sulphur contaminants A combination comprising a bed of a particulate copper-containing catalyst and, a guard bed of a particulate composition containing a) lead and/or at least one lead compound that reacts with hydrogen chloride and b) a support therefor. The lead compound is preferabl... | 08/29/2006 |
| 6602321 | Direct smelting process A direct smelting process and a fixed, ie non-rotatable, metallurgical vessel for producing metal from a metalliferous feed material is disclosed. The process is a molten bath-based process which includes injecting solid feed materials with a carrier gas ... | 08/05/2003 |
| 6428603 | Direct smelting process A direct smelting process and a fixed, i.e. non-rotatable, metallurgical vessel for producing metal from a metalliferous feed material is disclosed. The process is a molten bath-based process which includes injecting solid feed materials with a carrier ga... | 08/06/2002 |
| 6395058 | Method of alloying ferrous material with magnesium injection agent A treatment agent and method to introduce magnesium into ferrous material. The treatment agent includes a mixture of high melting temperature particles and magnesium particles. The content of high melting temperature particles in the particle mixture is p... | 05/28/2002 |
| 5931985 | Process and device for blowing oxygen-containing gas with and without solid material on a metal melt in a metallurgical vessel A process for blowing oxygen-containing gas, with and without solid material, on a metal melt in a metallurgical vessel, a process for generating a burner flame and corresponding devices. The inventive process and lance suitable for such process provides,... | 08/03/1999 |
| 5154756 | Method and apparatus for preliminary treatment of molten hot metal A method for the preliminary treatment of molten hot metal for steel making comprising passing molten hot metal towards the downstream side in a horizontally disposed trough-like vessel and injecting obliquely downwards a powdered refining agent into the ... | 10/13/1992 |
| 5078785 | Method of operating in-bath smelting reduction furnace A method of operating an in-bath smelting reduction furnace comprises the step of forming a slag zone in an in-bath smelting reduction furnace supplied with oxygen through a top lance and with agitation gas by bottom bubbling through tuyeres below the met... | 01/07/1992 |
| 4601749 | Method for adjusting chemical composition of molten pig iron tapped from blast furnace At least one lance is substantially vertically arranged above a hot-metal runner of a blast furnace so that the lowermost end of the lance is spaced apart by a prescribed distance from the surface of molten pig iron flowing through the hot-metal runner. A... | 07/22/1986 |
| 4591381 | Process of producing pig iron from iron ore concentrate A process for producing pig iron from iron ore concentrate, in a reactor vessel into which iron ore concentrate, coal, oxygen gas and slag formers are injected beneath the surface of a molten iron bath. According to the invention, the ratio CO2... | 05/27/1986 |
| 4541617 | Lance structure for oxygen-blowing process in top-blown converters Herein disclosed is a lance structure for use with a top-blown converter. The lance structure is constructed to include a cylindrical sheath having a bottom wall and a flux supply tube disposed at the center of the sheath and defining a passage for carryi... | 09/17/1985 |
| 4457778 | Steelmaking process with separate refining steps The present invention relates to a steelmaking process, in which the molten pig iron produced in a blast furnace is desiliconized, dephosphorized, decarburized and desulfurized. The characteristic of this invention is a sequence and combination of the ref... | 07/03/1984 |
| 4411696 | Steelmaking process with separate refining steps The present invention relates to a steelmaking process, in which the molten pig iron produced in a blast furnace is desiliconized, dephosphorized, decarburized and desulfurized. The characteristic of this invention is a sequence and combination of the ref... | 10/25/1983 |
| 4388112 | Steelmaking process with separate refining steps The present invention relates to a steelmaking process, in which the molten pig iron produced in a blast furnace is desiliconized, dephosphorized, decarburized and desulfurized. The characteristic of this invention is a sequence and combination of the ref... | 06/14/1983 |
| 4356032 | Method of dephosphorizing molten pig iron A method of dephosphorizing molten pig iron, wherein molten pig iron is charged into a refining vessel provided at its bottom with tuyeres for blowing gas and, if necessary, at its top with a gas injecting member, and a powdery refining agent together wit... | 10/26/1982 |
| 4105439 | Method for production of refined steel In a method of producing successive heats of refined steel wherein successive charges of molten, impure iron are refined by oxygen in the presence of at least one flux to form molten, refined steel and liquid slag, followed by the separation of said molte... | 08/08/1978 |
| 4067729 | Desulfurization of liquid iron melts The present invention provides novel desulfurizing agents and a process for desulfurizing liquid iron melts and in particular pig iron melts in the temperature range of between about 1240° C to 1400° C by injecting into the melt, by means of a carrier g... | 01/10/1978 |
| 4026698 | Removal of tin from molten iron by chlorination, using oxygen to conserve chlorine and to produce tin oxide A process for detinning molten iron involves bubbling gaseous chlorine through the molten iron bath, which contains dissolved tin among other elements (e.g. manganese). As chlorides of tin, iron and these other elements are leaving the metal bath in vapor... | 05/31/1977 |
| 3948644 | Steel making vessel with dust recycling method and means The flue gases from a steel refining furnace or vessel are delivered to a gas cleaning system in which the dust is removed and collected in slurry form. The slurry is dried and reduced to dust again after which it is delivered to a storage vessel. The dus... | 04/06/1976 |
