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| Number | Title | Issue Date |
| 8092572 | Method of regulating the output of carbon monoxide in a metallurgical melting process In a method of regulating the output of CO in steel production, oxygen is introduced into a melt to remove carbon present, the actual value of the carbon stream evolved from the melt is determined, the intended value of the evolved carbon stream derived from the amo... | 01/10/2012 |
| 7785393 | Refinement of steel A method of forming and refining molten silicon-bearing steel by addition of a calcium-containing silicon additive. Determine if the amount of calcium in the calcium-containing silicon additive is more or less than the amount of calcium desired in the finished steel... | 08/31/2010 |
| 7271566 | Method and system for managing the voltage on the DC bus of a speed controller for an AC motor A method and system for managing the voltage of a DC bus of a speed controller for an AC electric motor linked to a current distribution network. The method includes comparing a value of the voltage measured on the DC bus with a determined limit value, when the valu... | 09/18/2007 |
| 7169235 | Cleaning method and polishing apparatus employing such cleaning method A method is suitable for cleaning substrates, after polishing, that require a high degree of cleanliness, such as semiconductor wafers, glass substrates, or liquid crystal displays. The method includes polishing a substrate using an abrasive liquid containing abrasi... | 01/30/2007 |
| 6960238 | Method and installation for the indirect reduction of particulate oxide-containing ores In a process for the gas reduction of particulate oxide-containing ores, in particular iron-oxide-containing material, in the fluidized-bed process at a pressure of | 11/01/2005 |
| 6830606 | Method for decarbonization refining of chromium-containing molten steel The present invention: solves the problems of hitherto disclosed technologies, such as insufficient suppression of the oxidation loss of [Cr] and the excessive erosion of refractories, in the decarburization-refining of chromium-contained molten steel under a normal... | 12/14/2004 |
| 6695936 | Methods and apparatus for using large inertial body forces to identify, process and manufacture multicomponent bulk metallic glass forming alloys, and components fabricated therefrom To identify and manufacture metallic glass forming alloys, large inertial forces or "g"-forces are used to sequentially separate crystalline phases (particles) as they sequentially form and grow in a molten alloy during gradual cooling of the alloy below ... | 02/24/2004 |
| 6669754 | Method for optimizing the layout and operation of a reduction method A description is given of a method of optimizing the design and operation of a reduction process for iron-containing charge materials (3), preferably in lump form, in a reduction shaft (1) to which reduction gas (9) is fed, for example from a fusion gasif... | 12/30/2003 |
| 6607577 | Desulphurization reagent control method and system A method and computer program for determining the amounts of desulphurizing reagents required to reduce the sulphur content in hot metal to meet a specified aim concentration. The determination of the amounts of reagents is based on a multivariate statist... | 08/19/2003 |
| 6395054 | Process for producing pozzolanes, synthetic blast furnace slags, belite or alite clinkers, or pig iron alloys from oxidic slags A process that produces pozzolanes, synthetic blast furnace slags, belite, or alite clinkers, as well as pig iron alloys, from oxidic liquid slag. The oxidic liquid slag is reduced above an iron bath in a reactor containing submerged tuyeres. Carbon is bl... | 05/28/2002 |
| 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 |
| 6319301 | Method for the direct reduction of iron oxides Method for the direct reduction of mineral iron inside a vertical reduction furnace (10) of the type with a gravitational load, wherein the reduction gas flows in counter-flow with respect to the material introduced into the furnace, comprising the follow... | 11/20/2001 |
| 6171364 | Method for stable operation of a smelter reactor A process of producing molten iron involves: a) introducing iron oxide, flux, oxygen, nitrogen, carbon, and hydrogen to a smelter reactor; b) maintaining conditions to cause (i) the iron oxide to be reduced, (ii) molten iron to be created and stirred in the bo... | 01/09/2001 |
| 6165248 | Evaluating precious metal content in the processing of scrap materials A method for evaluating a batch of scrap material, subsequent to processing of the batch, to determine the content of precious metal present in the batch prior to processing of the batch, includes introducing a predetermined amount of a tracer into the ba... | 12/26/2000 |
| 6116079 | Liquid copper hydrogen sample probe A method is disclosed for improving the making of metals such as steel and copper by using a molten metal gas measurement system to measure the gas content of the molten metal particularly H2 content, and to controlling the metal making process... | 09/12/2000 |
| 5948137 | Scrap metal measuring and weighing process and apparatus An on-line system for measuring the composition of scrap metal, including a loader with a load sensor having a motion compensator linked to a bulk material analyzer such as a prompt gamma-ray neutron activation analyzer. The grade of scrap used to prepare... | 09/07/1999 |
| 5850034 | Making of metal products using a gas analyzer A method for improving the making of metals such as steel and copper by specially using a gas measurement system to analyze molten metals for gas, particularly H2 content, and to controlling the metal making process based on these values. The preferred ga... | 12/15/1998 |
| 5741348 | Method for refining an aluminium scrap smelt A method of refining a melt of aluminum scrap material which comprises metallic aluminum and impurities including iron, in order to obtain a target iron level. The method includes the steps of determining the initial amounts in the melt of Mn, Fe and Si, ... | 04/21/1998 |
| 5693120 | Production method for low carbon molten steel using vacuum degassing and decarburization treatment In a vacuum degassing and decarburization treatment, the present invention uses a CO2 gas as a recirculating gas and as a stirring gas without inviting stoppage of decarburization and an increase in the carbon concentration and moreover, withou... | 12/02/1997 |
| 5618032 | Shaft furnace for production of iron carbide Apparatus for the production of iron carbide in a shaft furnace, by reacting a carbon containing reducing gas as the process gas with particulate metal oxide material for an extended residence time at low temperature, including residence time and operatin... | 04/08/1997 |
| 5451246 | Process and device for heating and melting lumps of sponge iron For heating sponge iron to temperatures of about 850° C. without substantial oxidation losses, there are provided at least two separate preheating stages at different temperatures, to which the sponge iron is successively fed and in which the temperature... | 09/19/1995 |
| 5327357 | Method of decarburizing molten metal in the refining of steel using neural networks A method of decarburizing molten metal in the refining of steel using neural networks with a first neural network trained to analyze data representative of many process periods of one or more decarburization operations for providing an oxygen count for a ... | 07/05/1994 |
| 5293924 | Manufacture of copper rod A method is disclosed for improving the continuous casting process for making copper by using a probe and analyzer which measures the gases present in the molten copper and controls the process based on the analyzer results.... | 03/15/1994 |
| 5125963 | Metallurgical controlling method The present invention relates to a method for monitoring and control of smeltmetallurgical processes, endothermic as well as exothermic ones, preferably pyrometallurgical processes, by means of optical spectrometry, whereby one first determines for each e... | 06/30/1992 |
| 5082044 | Method and apparatus for controlling the composition of a molten metal bath An apparatus has means for controlling the composition of a molten metal bath of various elements for providing a consistent molten metal product. The apparatus is automated and the addition of elements to a molten bath is automatically controlled. Also, ... | 01/21/1992 |
| 4940487 | Process for utilizing of zinc-containing metallurgical dusts and sludges In a process for utiliting zinc-containing metallurgical dusts and sludges, the zinc-containing dusts and sludges are agglomerated, briquetted in a cold manner or pelletized and are added to the charge of a melting furnace for melting metal from metallize... | 07/10/1990 |
| 4880459 | Method of and apparatus for reducing iron oxide to metallic iron This invention relates to a method and apparatus for reducing iron oxide to metallic iron, utilizing a continuous process employing a reducing gas with high hydrogen and carbon monoxide content made by a catalytically reforming mixture of hydrocarbons, re... | 11/14/1989 |
| 4875934 | Method of deoxidizing molten ferrous metals The present invention discloses a method for efficient aluminum deoxidation of ferrous melts, generally comprising preparation of a deoxidizing agent having a discrete layer of aluminum surrounding a ferrous core, and introducing the prepared deoxidizing ... | 10/24/1989 |
| 4776884 | Process for determining the arrangement of the layered charges in a blast furnace prior to smelting A process for determining the arrangement of the layered charges in a blast furnace prior to smelting. Positioned in the layered charges in the blast furnace are a plurality of upright tubes in each of which an eddy current probe is moved up and down. The... | 10/11/1988 |
| 4744822 | Process for continuous purification of hot metal A process for the continuous treatment of hot metal as it is running from the blast furnace, in order to enable low phosphorus and sulphur levels to be attained simply and cheaply, so that the metal thus treated is suitable for subsequent use in the conve... | 05/17/1988 |
| 4568386 | Process for purifying metals by insufflation and product produced thereby A process for refining pig iron from below the surface of a molten metal bath, and the resulting product, in which an oxidizing gas is injected in the bath and, during the last refining stage, a mixture of oxidizing gas and inert gas is further injected. ... | 02/04/1986 |
| 4564391 | Method for the recovery of silver from silver zeolite High purity silver is recovered from silver exchanged zeolite used to capture radioactive iodine from nuclear reactor and nuclear fuel reprocessing environments. The silver exchanged zeolite is heated with slag formers to melt and fluidize the zeolite and... | 01/14/1986 |
| 4551175 | Method for controlling slag chemistry in a refining vessel Method for slag chemistry control in a refractory lined vessel during the process of refining metal by the injection of oxygen gas during a period of oxidation and by the injection of nonoxidizing gas or gases during a period of reduction and melt specifi... | 11/05/1985 |
| 4544407 | Process for producing cast iron castings with a vermicular graphite structure Cast iron with a vermicular graphite structure is produced by a process which involves the steps of determining the ratio of magnesium to sulphur in the melt and then adjusting the value of such ratio to between about 0.8 and 2.5.... | 10/01/1985 |
| 4525211 | Process for producing a microkilled steel suitable for freerun continuous casting for subsequent cold forming In order to produce a microkilled steel suitable for free-run continuous casting for subsequent cold forming standardizing of the C - content to ࣘ0.05%, preferably ࣘ0.03%, Si - content to ࣘ0.05%, preferably 0.02-0.04%, and Al - content to ࣘ0.006% ... | 06/25/1985 |
| 4428770 | Methods of manufacturing metal from a melt, determination of sulfur and carbon therein, sensors therefor and solid electrolyte compositions for said sensors Materials, methods and articles for the electrochemical determination of sulfur and carbon in fluids are provided. In accordance with a preferred embodiment, an electrolyte is furnished comprising a solid solution of an oxide of either zirconium, thorium ... | 01/31/1984 |
| 4419128 | Continuous melting, refining and casting process In a continuous melting, refining and casting process which comprises, substantially in series, a step of melting and carburizing steel scrap, iron scrap and/or reduced iron as a raw material in a combustion-type melting furnace, a refining step by blowin... | 12/06/1983 |
| 4401464 | Injection metallurgy method and equipment for its execution The invention relates to a method and equipment of producing with good reproducibility steel which is extremely free from slag inclusions, particularly steel with low sulphur content and thus very low contents of sulphidic slag inclusions, starting with a... | 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 |
| 4319923 | Recovery of gold and/or palladium from an iodide-iodine etching solution A method of recovering gold and palladium from a spent aqueous potassium iodide-iodine etching solution, and regenerating the etching solution for reuse, involves adjusting the spent solution to a strongly basic pH (e.g., 12.5) by the addition of an alkal... | 03/16/1982 |
