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| Number | Title | Issue Date |
| 8080084 | Method for recycling steelmaking dust A method for recycling steelmaking dusts has a granulating step of mixing steelmaking dusts, containing as a principal component iron and oxides thereof produced during the steelmaking in a melting furnace, with a powder containing carbon as a principal component an... | 12/20/2011 |
| 8007564 | Manufacture method of briquette for use as metal stock and manufacturing apparatus thereof A manufacture method of briquette for use as metal stock is provided which increases the efficiency of drying porous masses so as to shorten a drying time, and which provides a simplified constitution for reducing an installation area of a system and for reducing th... | 08/30/2011 |
| 7981192 | Method and device for producing binderless briquettes and briquettes comprising metal chips and metal dusts The invention relates to a process for producing binderless briquettes from metal chips and metal dusts in which the metal chips are pressed into a cup-shaped form and the upwardly open cavity produced as a result is filled with metal dust, after which the opening i... | 07/19/2011 |
| 7776136 | Apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcined additives and method using the same A method for manufacturing molten iron including the steps of producing reducing material of mixed hot fine direct reduced iron and calcined additives, the reducing material being produced from multiple fluidized beds; charging the reducing material to at least one ... | 08/17/2010 |
| 7717979 | Composition for a desulfurizer with a high sulfur capacity and the process of making the same The present invention discloses a composition for a desulfurizer with a high sulfur capacity and a process for making the same. The composition comprises the active components of three kinds of iron oxides and is used in the desulfurizer to remove hydrogen sulfide f... | 05/18/2010 |
| 7645321 | Method for the production of ore with green agglomerates containing a proportion of fines A method for the production of ore comprising a proportion of fines, additives and green agglomerates optionally containing a binder, provided with an outer coating consisting of a combustible containing fine-grained carbon, such as coke. According to the method, th... | 01/12/2010 |
| 7591877 | Manufacturing method of briquette for use as metal stock A manufacturing method of briquette for use as metal stock is provided which is adapted for effective reduction of a drying time of a porous mass such that the quantity of energy required for the drying process may be reduced. A porous mass is formed by compressing ... | 09/22/2009 |
| 7204866 | Niobium or tantalum powder and method for production thereof, and solid electrolytic capacitor A niobium or tantalum powder of the present invention comprises aggregates in which primary particles of niobium or tantalum are aggregated, and have a pore distribution having a peak in the range from 1 to 20 μm as measured by mercury porosimetry. That is, the nio... | 04/17/2007 |
| 7014678 | Use of oil-charged mill-scale in shaft furnaces and converters after chemical binding and pelleting thereof According to the invention, oil-charged mill-scale is treated such that the oil is encapsulated or bound therein. An escape of oil on use in a shaft oven first occurs when the ignition point is reached, thus guaranteeing combustion. Agglomeration of said mixture is ... | 03/21/2006 |
| 6921427 | Process for cold briquetting and pelletization of ferrous or non-ferrous ores or mineral fines by iron bearing hydraulic mineral binder The present invention provides a process for cold briquetting and pelletization of ferrous or non-ferrous or mineral fines using iron bearing hydraulic mineral binders for metallurgical applications, said process consisting the steps of: mixing 80-95% by Wt. of a me... | 07/26/2005 |
| 6918944 | Carbon containing nonfired agglomerated ore for blast furnace and production method thereof A nonfired agglomerated ore which is satisfactory in reduction property in the shaft of a blast furnace and excellent in rapid heating bursting property and a production method thereof are provided. A carbon containing nonfired agglomerated ore for blast furnace whi... | 07/19/2005 |
| 6755888 | Facility for reducing metal oxide, method for operating the facilities and moldings as raw material to be charged to reduction furnace The present invention provides a reducing furnace of the rotary hearth-type and a method for reducing a metal oxide simplified in the process from dehydration to molding, according to which a moisture-rich powdery raw material is reduced at low cost. The present inv... | 06/29/2004 |
| 6743275 | Method of making and using ferrous metal particle briquettes Ferrous metal briquettes made from ferrous metal particles and an alkaline metal silicate, for adding to ferrous melts to recycle the particles. ... | 06/01/2004 |
| 6676725 | Cold bonded iron particulate pellets Shaped bodies containing particulate iron materials, such as cast pellets, briquettes and the like, with sufficient strength to withstand temperatures of up to at least 1000° C. can be obtained by using a fully hydrated high-alumina cement as the binder.... | 01/13/2004 |
| 6589667 | Spherical porous iron powder and method for producing the same The invention concerns an iron powder characterised by spherical form and a porous structure throughout. The powder particles have an average particle diameter between 10 and 300 μm, a specific surface area of at least 100 m2 /kg, a flowabilit... | 07/08/2003 |
| 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 |
| 6494933 | Method of utilizing secondary raw materials containing iron, zinc and lead The invention relates to a method of utilizing secondary raw materials containing iron, zinc and lead, preferably steelmaking dusts, in a rotary tubular furnace customarily equipped for the rolling process, with basically adjusted rolling slag. By reducin... | 12/17/2002 |
| 6391085 | Metal feedstock from wasted metal products A metal feedstock from wasted metal products is disclosed. The feedstock is formed by crushing the metal products into pieces; magnetically separating sheet-shaped ferrous scraps and ferrous cast blocks from the crushed pieces; placing the cast blocks bet... | 05/21/2002 |
| 6387175 | Roadway base intermediate, roadway base, and methods of manufacture A roadway base comprises oily sludge, steelmaking slag fines, and an additive selected from the group consisting of cement, fly ash, asphaltic emulsion, and mixtures thereof... | 05/14/2002 |
| 6372011 | Method for producing an iron melt using iron-containing residual smelting plant materials For effectively reprocessing iron-containing residual smelting plant materials (1 to 3), in which iron may be present both in metallic form and in oxidic form, with lowest possible energy expenditure, the residual smelting plant materials (1 to 3) are pro... | 04/16/2002 |
| 6357099 | Preparation of metal feedstock from wasted metal products A method of forming a metal feedstock from wasted metal products is disclosed. The method includes the steps of crushing the metal products into pieces; magnetically separating sheet-shaped ferrous scraps and ferrous cast blocks from the crushed pieces; p... | 03/19/2002 |
| 6340378 | Method for screening hot briquetted direct reduced iron A process and apparatus for separating briquettes and fragments in a product stream resulting from briquetting direct reduced iron. Separating and cooling of the briquettes and fragments are carried out simultaneously in an initial step with use of separa... | 01/22/2002 |
| 6280497 | Cored wire for treating molten metal and method of manufacture A cored wire continuously formed by continuously inserting an extruded core inside a continuously roll formed sheath, the peripheral edges of the roll formed sheath joined by a continuous lock seam. Inspection of the partially formed lock seam at a design... | 08/28/2001 |
| 6277168 | Method for direct metal making by microwave energy A method for the direct preparation of metal from metal containing ore by applying microwaves, alone or in combination with other heating means, to extract metal from masses made by forming a powder of ore and an optional reducing agent. The method minimi... | 08/21/2001 |
| 6235085 | High carbon content briquettes A process for preparing high carbon content briquettes includes providing a particulate material which includes iron particles including iron oxide in an amount of at least about 4% based on weight of the material, and carbon particles in an amount greate... | 05/22/2001 |
| 6096112 | High carbon content briquettes A process for preparing high carbon content briquettes includes providing a particulate material which includes iron particles including iron oxide in an amount of at least about 4% based on weight of the material, and carbon particles in an amount greate... | 08/01/2000 |
| 6053960 | Method of manufacture of cored wire for treating molten metal A cored wire continuously formed by continuously inserting an extruded core inside a continuously roll formed sheath, the peripheral edges of the roll formed sheath joined by a continuous lock seam. Inspection of the partially formed lock seam at a design... | 04/25/2000 |
| 6030434 | Method for hot agglomeration of solid metallized iron particles to produce alloyed briquettes A method for making iron-alloy briquettes, includes the steps of: providing hot metallized iron particles having a temperature of at least about 650° C. and an initial degree of metallization of at least about 90% (wt.); providing an additive selected fr... | 02/29/2000 |
| 6024777 | Compacted steel powder alloying additive for aluminum melts, method of making and method of using A compacted steel powder in particulate form is used as an alloying additive for aluminum melts. The additive is in the form of a wafer which is smooth on one side and corrugated on the other side such that its thickness is 1 mm at the trough and 2-3 mm a... | 02/15/2000 |
| 5935296 | Bonded medium Thermally shock stable bonded solid materials are formed by mixing a solid mineral or inorganic material in an aqueous medium with a lignosulfonate, treating the aqueous medium with a metal ion- based complexing agent (such as lime), with application of h... | 08/10/1999 |
| 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 |
| 5885328 | Method of agglomerating oil-containing steel mill waste A method of agglomerating oil-containing steel mill waste includes the step of combining a first steel mill waste component with a second steel mill waste component to form a mixture. The first waste component includes substantially dry non-oily steel mil... | 03/23/1999 |
| 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 |
| 5776225 | Refractory metal sponge fines composition A clean refractory metal sponge fines product is made from refractory metal sponge fines free of refractory metal oxides, carbides, nitrides and binary iron alloys; silicon carbide, oils, greases and organic compounds; salt; dust; dirt; pieces of iron, ir... | 07/07/1998 |
| 5759231 | Method for processing metal chips and/or metal dust A method for processing metal chips and/or metal dust, including a first process step in which the metal is moistened and fed by a conveyor system to a collecting tank, especially a settling tank. In further process steps the material being processed pass... | 06/02/1998 |
| 5597401 | Refractory metal SWARF composition and method of making same A clean refractory metal SWARF particle product is made from refractory metal SWARF. The SWARF particles are produced with coolant at a temperature less than 650° C. to prevent formation of refractory metal oxides and nitrides. The SWARF particles are co... | 01/28/1997 |
| 5587002 | Process for the preparation of a cooling agent containing iron for a steel-making converter The present invention relates to a process for the preparation of a cooling agent containing iron for refining steel in a steel-making converter. The cooling agent is formed from ovoids produced from fatty slurries from rolling mills. The present inventio... | 12/24/1996 |
| 5505903 | Method of producing cold-moulded iron-containing briquettes In the manufacture of cold-moulded briquettes from iron-containing waste metallurgical material mixed with a binder, in order to obtain high-strength briquettes and almost complete reducibility, magnetite waste metallurgical material such as scale (1) is ... | 04/09/1996 |
| 5453109 | Method for the preparation of a hardening salt in piece form and product A method for the preparation of a salt mixture useful for hardening steel parts, including of potassium cyanate, potassium carbonate and sodium carbonate, wherein 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassi... | 09/26/1995 |
