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| Number | Title | Issue Date |
| 8062579 | Device for moving a runner A device (10), for moving a runner (12) of a shaft furnace between an upper tapping floor level (42), where the runner is in an operational position in front of a taphole of the furnace, and a lower service level (40), where the runner is... | 11/22/2011 |
| 8021599 | Method and installation for producing steel products with optimum surface quality A method for producing steel products (1) with optimum surface quality wherein the molten steel (1b) is produced in a process route (10, 100; 12; 13) that is selected according to a desired final microstructure (9), by melting in a... | 09/20/2011 |
| 7901616 | Method of building a direct smelting plant Method of building a direct smelting plant comprising a metal smelting vessel (11) and ancillary plant components such as the components of a hot air supply station (24), an offgas treatment station (32), a solids feed station (41), a hot... | 03/08/2011 |
| 7897100 | Method and device for the continuous production of steel using metal charge material The invention relates to a method and device for the continuous production of steel using metal charge material (8) that is preheated in an upper part of a melting vessel (2), is then melted in a lower part (9) of the melting vessel l(2) ... | 03/01/2011 |
| 7867436 | Process and apparatus for use in recycling composite materials A process for recycling composite materials includes the steps of feeding a quantity of composite material composed of at least one polymer and aluminum into at least one first reactor; heating the composite material in a non-oxidizing environment at a temperature s... | 01/11/2011 |
| 7858020 | Molten metal flow powered degassing device The invention features a molten metal flow powered device including a housing, a rotor rotatably supported by the housing, the rotor being configured and arranged to be powered by a stream of molten metal discharged from a pump, and a gas transfer conduit having an ... | 12/28/2010 |
| 7582252 | Plant with rotating furnace for the melting without salt of aluminum with screening and recovery of the slags A plant is provided for the melting of primary and secondary aluminium, provided with a rotating furnace, internally equipped with a spiral element (11), that causes the melting of the aluminium not requiring use of a salty bath. The plant includes a pouring ... | 09/01/2009 |
| 7504065 | Direct smelting plant and process A solids feed means for a direct smelting plant is disclosed. The solids feed means includes 2 or more pairs of lances for injecting solid feed materials for a direct smelting process into a direct smelting vessel. The solids feed means also includes a main supply l... | 03/17/2009 |
| 7279127 | Continuous steelmaking plant The present invention provides a process plant for the production of molten steel from primary and/or secondary ferrous materials in which no free oxygen is permitted to contact directly carbon-containing iron melts, comprising:—i) at least three pairs of furnaces... | 10/09/2007 |
| 7201868 | Direct smelting plant A direct smelting plant for producing molten metal from a metalliferous feed material is disclosed. The plant includes a fixed smelting vessel to hold a molten bath of metal and slag and a gas space above the bath. The plant also includes means for supplying solids ... | 04/10/2007 |
| 7033417 | Method and installation for reducing orefines in a multi-stage suspension gas stream using a cyclone separator The invention relates to the reduction of fine ores, whereby in a multi-stage gas suspension preheater the fine ores are preheated, calcined and then reduced in at least one lowest heat exchanger stage with the addition of a reducing agent in a delivered hot gas str... | 04/25/2006 |
| 6953337 | Transfer of hot feed materials from a preprocessing plant to an electric smelting or melting furnace Apparatus for transferring hot material between a preprocessing plant and an electric furnace has an enclosed housing extending between the plant and the furnace and within which a controlled atmosphere is maintained, at least one bin having at least one compartment... | 10/11/2005 |
| 6945077 | Method for treating steel plant slag A method is presented for the treatment of slag from electric steel plants which comprises the following steps: (a) transference of the slag into a metallurgical receptacle; (b) defoaming of the slag in this metallurgical receptacle by adding a defoaming agent, pref... | 09/20/2005 |
| 6833106 | Compact blast furnace installation In order to design a blast furnace in a space and cost-saving manner, the invention provides for an especially compact blast furnace (10) having no hearth, wherein the burden is transported to the charging platform by vertical conveyers (20) and a comp... | 12/21/2004 |
| 6818175 | System for producing steel The invention relates to a device for producing steel. The invention device comprises a container (1, 101, 201). The metal used is molten, blown and refined in said container which comprises an upper component (5, 205) having at least one opening, a lo... | 11/16/2004 |
| 6719944 | Method and apparatus for deslagging and tapping an integrated electric steel making furnace An electric steel-making furnace has a furnace roof carried by an upper furnace shell on a lower furnace shell to substantially envelop an atmosphere above liquid steel and slag floating thereon in the lower furnace shell. A transfer car supports the lower furnace s... | 04/13/2004 |
| 6696013 | Metallurgical furnace with scrap metal preheater and dispenser A Preheater-Steelmaking Furnace and closed loop Process System for semi-continuous melting of integrally preheated recycled or virgin ferrous charge, by using highly energy efficient combustion process of natural gas combusted by oxygen as the main heat s... | 02/24/2004 |
| 6610243 | Installation for aqueous granulation A granulation plant for aqueous granulation of a product includes a granulation tank fitted for the injection of granulation water in order to granulate the product. The granulation plant further includes a sedimentation tank, separate from the granulatio... | 08/26/2003 |
| 6562101 | Processing electric arc furnace dust through a basic oxygen furnace Methods and apparatus for processing electric arc furnace ("EAF") dust through a basic oxygen furnace (BOF) to recover iron value from the EAF dust and concentrate zinc from the EAF dust into a material useful as a feed in zinc manufacturing processes. Th... | 05/13/2003 |
| 6544469 | Apparatus and method for producing metal formed product An apparatus for producing a metal formed product comprises a molten metal-holding furnace; a semisolidified metal-producing mechanism; a cooling member-restoring mechanism arranged adjacent to the semisolidified metal-producing mechanism, for applying a ... | 04/08/2003 |
| 6521170 | Revamping of a basic oxygen furnace installation to provide an electric furnace facility An existing steel making installation having a basic oxygen furnace facility is converted to an electric arc furnace facility for refining steel by modifying the furnace support pedestals to form spaced apart horizontal rail support pads and spaced apart ... | 02/18/2003 |
| 6399016 | Direct smelting plant Direct smelting plant for producing molten metal from a metalliferous feed material induces a smelting vessel 11 to hold a molten metal and slag bath beneath a hot gas space. Solids injection lances 27 extend downwardly and inwardly through side walls of ... | 06/04/2002 |
| 6287512 | Frame for a blast furnace A frame for supporting structural components of a blast furnace includes a bottom section connected to a foundation, a middle section and a top structure arranged above the furnace top, wherein the frame is manufactured as a latticework construction and/o... | 09/11/2001 |
| 6287363 | Method of utilizing dusts produced during the reduction of iron ore In a method of effectively utilizing dusts incurring in the reduction of iron ore by means of a reducing gas and separated on that occasion in a scrubber in the form of sludges, the sludges at first are dehydrated and are used as starting materials for th... | 09/11/2001 |
| 6277324 | Apparatus for manufacturing molten pig iron and reduced iron by utilizing a fluidized bed An apparatus and a method for manufacturing molten pig iron by using a fine iron ore are disclosed. Coal is used to produce a reducing gas, and a fine iron ore is used to produce a molten iron and a reduced iron in a simple and efficient manner. The appar... | 08/21/2001 |
| 6264722 | Process for producing liquid pig iron or intermediate steel products and installation for implementing it In a process for producing molten pig iron or steel preproducts from fine-particulate iron containing material in a meltdown gasifying zone of a melter gasifier, under the supply of carbon-containing material and oxygen-containing gas at the simultaneous ... | 07/24/2001 |
| 6126716 | Iron-base scrap preheating apparatus and method In order to preheat pieces of iron scrap of various sizes and shapes highly effectively while avoiding the fusion of the pieces of iron scrap, a rotary kiln type preheating furnace and a shaft type preheating furnace are arranged in parallel with each oth... | 10/03/2000 |
| 6036914 | Dumping bay with fume collecting provisions An improved dumping bay particularly adapted for preventing the escape of hazardous fumes into other areas of a facility is disclosed. The dumping bay is fully enclosed and utilizes a unique air flow routing technique for collecting fumes, such as from a ... | 03/14/2000 |
| 6017486 | Comprehensive fume collection system for production of leaded steel A comprehensive fume collection system, particularly adapted for the collection of lead-containing fumes or gases typically emitted during the manufacture of leaded steel, is disclosed. The preferred fume collection system comprises four sections, each se... | 01/25/2000 |
| 5944871 | Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process In a process for the production of molten pig iron (12) or steel pre-products from fine particulate iron-containing material, in particular reduced sponge iron, in a meltdown gasifying zone (6) of a melter gasifier (5) the iron-containing material is melt... | 08/31/1999 |
| 5900209 | Plant for producing metal melts A plant for producing metal includes a electricity supply system and a direct-current electric arc furnace connected thereto, where in order to make do with an electricity supply system possessing a relatively small short-circuit capacity, the direct-curr... | 05/04/1999 |
| 5873960 | Method and facility for manufacturing seamless steel pipe The manufacturing method of the present invention comprises steps (1) through (8) which are sequentially arranged, and the steps or equipment from the production of billets to end products are connected in the same single continuous manufacturing line: (1... | 02/23/1999 |
| 5833734 | Process for the direct reduction of particulate iron-containing material and a plant for carrying out the process With a process for the direct reduction of particulate iron-containing material by fluidization, reformed gas, at least partially freed from CO2, is supplied to a fluidized-bed reduction zone as a reducing gas and is carried off from the same a... | 11/10/1998 |
| 5827473 | Method and apparatus for producing pig iron by smelting reduction and method of obtaining such a plant A plant for a smelting reduction process for pig iron production using coal and oxygen-containing gas is obtained by converting an existing blast furnace plant by replacing the blast furnace by apparatus including at least one metallurgical vessel for car... | 10/27/1998 |
| 5743937 | Earth melter with rubble walls and method of use The present invention is an improvement to the earth melter described and claimed in U.S. Pat. No. 5,443,618. The improvement is the use of rubble for retaining walls. More specifically, the retaining walls rest on ground level and extend above ground lev... | 04/28/1998 |
| 5554206 | Method of charging ore A method of and apparatus for charging fine-grained ore into a reactor pressure vessel through which process gas flows. The heated ore at first is introduced into a conveying pressure vessel, is pressurized within the same by compressed gas and subsequent... | 09/10/1996 |
| 5443618 | Earth melter An apparatus, and method of operating the apparatus, wherein a feed material is converted into a glassified condition for subsequent use or disposal. The apparatus is particularly useful for disposal of hazardous or noxious waste materials which are other... | 08/22/1995 |
| 5435526 | Collecting pit A collecting pit for receiving molten metal and draining cooling water. The collecting pit (1) is equipped with a drainage layer (5, 6) formed of slag granulate, the grains of the slag granulate being interconnected by means of a binder while maintaining ... | 07/25/1995 |
| 5407179 | Fluidized bed direct steelmaking plant A fluidized bed direct steelmaking plant for reducing raw iron ore fines and directly producing an iron product in a virtually closed gas system comprises an ore feed assembly, a multi-stage reactor assembly with a compacting assembly, a gasifier/smelter ... | 04/18/1995 |
| 5354355 | Earth melter and method of disposing of feed materials An apparatus, and method of operating the apparatus, wherein a feed material is converted into a glassified condition for subsequent use or disposal. The apparatus is particularly useful for disposal of hazardous or noxious waste materials which are other... | 10/11/1994 |
