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| Number | Title | Issue Date |
| 7867318 | Filter powder recycling process Process of treating filter dust (3) of the type produced in aluminium recycling processes in a recycling system for recycling the metal (1) of salt slag recycling (2), including at least a pyrolysis step (31) in which the filter dust (... | 01/11/2011 |
| 7594952 | Treatment of smelting by-products A method of treating a spent potliner after use in an aluminum smelting process, the method comprising crushing and classifying the spent potliner, placing the classified and crushed spent potliner in a furnace at a temperature greater than 450° C., heating the spe... | 09/29/2009 |
| 6863710 | Sinter mix enhancer A method of improving the sintering of mineral bearing ore which comprises the addition of an aqueous solution of a transition metal sulfate, preferable copper sulfate, to the sinter base mix or to the sinter trim feed is disclosed. ... | 03/08/2005 |
| 6840981 | Method of producing reduced iron and production facilities therefor A method of producing reduced iron pellets including reducing raw material pellets to obtain reduced iron pellets, and rolling the reduced iron pellets at a temperature ranging between 800 and 1200° C. sufficiently such that the reduced iron pellets undergo sinteri... | 01/11/2005 |
| 6773486 | Use of rice hull ash in steelmaking A method is provided by which rice hull ash is pelletized for use in steelmaking. The rice hull ash is blended with lime or dolime, and also with a mixture of water and molasses. This generates heat as the lime and water react to form lime hydroxide, a known binder.... | 08/10/2004 |
| 6641392 | Method for regulating a roasting furnace The invention relates to a method of regulating a roasting furnace in fluidized bed roasting. Part of the roasting furnace grate is separated off into a separate grate section, known as the overflow grate, where the nozzles and the amount of roasting gas ... | 11/04/2003 |
| 6602543 | Nanotechnology for magnetic components Nanostructured non-stoichiometric materials are disclosed. Novel magnetic materials and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel magnetic devi... | 08/05/2003 |
| 6565345 | Pressing device for compressing metal parts, in particular chips The invention relates to an extrusion device (1) for compacting metal parts, in particular shavings (3), for example made of Fe, Cu, Mg or alloys of these elements or other low melting metals or their alloys, into homogenous extrusion mouldings with at le... | 05/20/2003 |
| 6514312 | Steelmaking slag conditioner and method A slag conditioner for extending the life of a BOF vessel lining utilizing recycled blast furnace filter cake dewatered by contact with a hot slag; its process of production, and method of use.... | 02/04/2003 |
| 6471742 | Method for producing an improved charging stock for use in metallurgical processes A method for producing an improved charging stock for use in further metallurgical processes including the steps of providing a source of molten metal of known composition, providing a source of solid particulate material of a known composition which is c... | 10/29/2002 |
| 6447852 | Method of manufacturing a diamond composite and a composite produced by same The present invention relates to a method for manufacturing a diamond composite from diamond particles, comprising the steps of forming a work piece, heating the work piece and controlling the heating temperature and heating time so that a certain desired... | 09/10/2002 |
| 6383250 | Steel making revert and process for preparing Specific recycle materials are blended with hot slag and wet sludge to make a recyclable steelmaking revert. The specific recycle materials are kish, lime, glass, ferro-manganese and the like. The specific materials are blended with the slag and sludge in... | 05/07/2002 |
| 6372016 | Method for drying compacts An apparatus for producing reduced iron, and a compact drying method for application to the apparatus are disclosed. The apparatus comprises a pelletizer or a briquetter for mixing and agglomerating coal as a reducing agent and iron ore as iron oxide to f... | 04/16/2002 |
| 6352572 | Process for the thermal treatment of granulated iron ore prior to the reduction The wet granulated iron ore is initially conducted through a drying zone. The ore leaves the drying zone at a temperature of 120-400° C. The ore is then heated in direct contact with hot gas to temperatures of 700-1,100° C. before being delivered to a r... | 03/05/2002 |
| 6334885 | Method of solidifying steel-making slag and material produced by the method A method of solidifying a steel-making slag is performed by subjecting a mixture of a steel-making slag containing at least about 50% by weight of a powdery steel-making slag having a particle size not greater than about 5 mm and a substance containing at... | 01/01/2002 |
| 6270555 | Process for treating precious metal ores This invention provides a method to control the off gas emission of sulfur dioxide from a mineral ore roaster by grinding a sulfur-containing mineral ore, adding sodium sesquicarbonate to the mineral ore, and roasting the ore and sodium sesquicarbonate at... | 08/07/2001 |
| 6241808 | Production of iron ore pellets A process for producing fired pellets by granulating finely-ground iron ore and subjecting the resulting granules sequentially to drying, dehydration, preheating, and firing, wherein said process comprises adding an additive to said finely-ground iron ore... | 06/05/2001 |
| 6241805 | Method and system for improving the efficiency of a basic oxygen furnace A method is provided for improving the efficiency of a basic oxygen furnace operation and/or regulating its rate of molten iron consumption to accommodate interruptions in downstream production. The method comprises the steps of combining a wet scrubber s... | 06/05/2001 |
| 6221129 | Process for preparing flux suitable for soldering light metals such as aluminum A flux which contains irreversibly dehydrated K2 AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and ... | 04/24/2001 |
| 6136066 | Method of recycling iron-bearing waste material back into a basic oxygen furnace The invention is directed to a process for dehydrating and recycling back into a BOF converter wet BOF scrubber sludge to produce a steelmaking revert having an improved flow rate when handled in a recycle stream. Wet sludge is combined with hot BOF slag ... | 10/24/2000 |
| 6063159 | Method for inhibiting deposits in the calcination of fluxed iron ore pellets A stable aqueous solution comprising a water soluble salt of a magnesium compound is used to reduce deposits in kilns or furnaces used to make iron ore agglomerates, known as pellets, during iron ore calcination.... | 05/16/2000 |
| 5968230 | Method and furnace for disposal of steel-making waste, and operating method of the furnace A melting furnace for reforming steel-making slag so as to be available, for example, to roadbed ballast by mixing steel-making dust with the slag in molten states, which is provided with a fuel oxygen burner for melting the slag and the dust, a slag char... | 10/19/1999 |
| 5929001 | Engineered flux-pinning centers in BSCCO TBCCO and YBCO superconductors A method of preparing a high temperature superconductor. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase material. These components are combined to form a solid compacted mass with the m... | 07/27/1999 |
| 5897674 | Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace A method for manufacturing coal agglomerates for use in a direct smelting reducing furnace is disclosed, in which a fine coal is agglomerated at a high temperature in a simple manner, or anthracite or low free swelling coal having a low free swelling inde... | 04/27/1999 |
| 5879430 | Method and apparatus for aging steel-making slag A method for aging steel-making slag comprising the steps of charging normal temperature steel-making slag crushed to the extent that the slag having a grain diameter of 25 mm or less which constitutes 80% or more of the total amount into a pressure vesse... | 03/09/1999 |
| 5833881 | Composition for inhibiting deposits in the calcination of fluxed iron ore pellets A stable aqueous solution comprising a water soluble salt of a magnesium compound, a surfactant and a calcium salt inhibitor is used to reduce deposits in kilns or furnaces used to make iron ore agglomerates, known as pellets, during iron ore calcination.... | 11/10/1998 |
| 5817164 | Method and apparatus for making feedstock for steel making Improvements in metallurgical conversion in accordance with the present intion consist in the preparation of a semifinished item (a charge stock) in the form of a pig by forming thereof in a molding box of a casting machine from a solid filler, for the m... | 10/06/1998 |
| 5803949 | Fluidized bed roasting process A method of stabilizing a fluidized bed in a fluidized bed roasting process for metal sulphide concentrate comprises the step of controlling the particle size distribution of the particulate material in the bed so that a minimum amount of no less than abo... | 09/08/1998 |
| 5785737 | Method for recycling iron bearing sludges in a steelmaking operation The invention is directed to a process for dehydrating wet BOF scrubber sludge to produce a steelmaking revert having an improved flow rate when handled in a recycle stream. Wet sludge is combined with hot BOF slag to provide a slag/sludge mixture. The we... | 07/28/1998 |
| 5725631 | Composite charge for metallurgical processing A composite charge for metallurgical processing which reduces the content of non-metallic inclusions in the end product(s) comprises 40-83 wt. % of a metallic agent, 17-50 wt. % of an oxide agent and 0.1-10.0 wt. % of a carbonaceous agent. The carbonaceou... | 03/10/1998 |
| 5698009 | Method for agglomerating pre-reduced hot iron ore particles to produce ingot iron A method for agglomerating iron ore particles pre-reduced to produce hot pig iron, wherein hot iron ore particles pre-reduced in the pre-reduction furnace are simply mixed with aluminum powder or aluminum-containing metal powder before being loaded in the... | 12/16/1997 |
| 5666638 | Process for producing sponge iron briquettes from fine ore The present invention relates to a method for making sponge iron briquettes from fine ore with a maximum grain size of less than 2 mm, preferably less than 0.5 mm, wherein hot fine ore is fed to a roller press comprising two press rolls and is briquetted ... | 09/09/1997 |
| 5656062 | Method for inhibiting deposits in the calcination of fluxed iron ore pellets A stable aqueous solution comprising a water soluble salt of a magnesium compound is used to reduce deposits in kilns or furnaces used to make iron ore agglomerates, known as pellets, during iron ore calcination.... | 08/12/1997 |
| 5435831 | Circulating fluidizable bed co-processing of fines in a direct reduction system A method of producing direct reduced iron from pellets, lumps and fines of iron oxide. A mixture of iron oxide raw material is introduced to an apparatus which separates the lumps and pellets from the fines. The lumps and pellets are then introduced to a ... | 07/25/1995 |
| 5421858 | Ore feed heating An improved method of extracting minerals from ore is described. The method is applicable to vat leaching operations and may also be useful in heap leaching operations. The method involves the pre-heating of comminuted ore prior to the agglomeration phase... | 06/06/1995 |
| 5407459 | Process for the preparation of calcium aluminates from aluminum dross residues The present invention is concerned with a process for the preparation of sintered calcium aluminates that can generally be used as a protective cover for liquid metals, and particularly steel, and the process comprising the steps of mixing calcium oxide, ... | 04/18/1995 |
| 5382279 | Method and apparatus for combustion of steel plant wastes A process for consuming oily sludge waste product in steel making operations includes spraying a waste slurry onto the moving porous bed of a sinter strand. A burner hood is spaced above a portion of the moving bed. The bed carries a sinter mix which is i... | 01/17/1995 |
| 5266263 | Reprocessing of used evaporation boats The invention relates to the reprocessing of used evaporation boats. This is done by a method which comprises comminuting used, aluminum-contaminated evaporation boats and roasting them in a nitrogen-containing atmosphere.... | 11/30/1993 |
| 5228904 | Infra red ignition method for ore sintering process A method and apparatus for sintering a mixture of finely divided ore and a solid reductant, preferably in agglomerated form, includes heating the mixture on a hearth (6) with radiant energy in the form of infra red radiation from an infra red source such ... | 07/20/1993 |
| 5114474 | Arrangement and method for introducing waste material into a molten slag A method and device for the economic and environmentally safe disposal of waste material and molten slag from a cupola furnace comprises admixing the waste material with either molten slag or granulated slag so as to form a homogeneous mixture of the wast... | 05/19/1992 |
