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| Number | Title | Issue Date |
| 8142710 | Reduction apparatus, reduction apparatus manufacture method, and vacuum smelting reduction furnace using the same The invention discloses a reduction apparatus having a main body made of silicon carbide-based material and collectively formed by a top portion, a bottom portion, and a side portion, wherein the bottom portion includes a slanted plane, and the main body has an inle... | 03/27/2012 |
| 8057735 | Center backfire inner heat regenerative energy saving high efficiency furnace and tank integration reduction furnace system A center backfire inner heat regenerative energy saving high efficiency furnace and tank integration reduction furnace system comprises a furnace section and a heating section. The furnace section includes a reduction tank, a material inlet door, a magnesium crystal... | 11/15/2011 |
| 7704443 | Carbothermic aluminum production apparatus, systems and methods Apparatus, systems and methods for carbothermically producing aluminum are disclosed. The systems may include a reactor and an electrical supply. The reactor may include a plurality of side-entering electrodes and a top-entering electrode. The electrical supply may ... | 04/27/2010 |
| 7402191 | Process for producing sintering feedstock and apparatus therefor As a pretreatment of a manufacturing process of sintered ore, a sintering material including iron ore, a SiO2-containing material, a limestone base powdery material and a solid fuel type powdery material is projected as a additional coating auxiliary raw ... | 07/22/2008 |
| 7264765 | Method and apparatus for smelting titanium metal This invention relates to a method and an apparatus for smelting titanium metal by the thermal reduction of titanium oxide (TiO2) to titanium metal (Ti); a mixed salt of calcium chloride (CaCl2) and calcium oxide (CaO) contained in a reaction v... | 09/04/2007 |
| 7214256 | Solvent extraction process A circuit configuration for a metal solvent extraction plant comprising: A) an extraction section for extracting metal ions from an aqueous leach solution containing the metal ions with an organic solvent solution containing at lea... | 05/08/2007 |
| 6972107 | System for direct electrowinning of copper A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent extraction techniques or apparatus. A process for re... | 12/06/2005 |
| 6893606 | Method and system for extracting metal from glass waste A method and systems are provided for extracting heavy metal from glass waste. Glass is initially crushed to a diameter size between about 10 nanometers and about 2 millimeters. The glass is then added to a tank having a solution of water and acid, where the acid re... | 05/17/2005 |
| 6893605 | Method and system for extracting metal from glass waste A method and systems are provided for extracting heavy metal from glass waste. Glass is initially crushed to a diameter size of about 2 millimeters. The glass is then added to a tank having a solution of water and acid, where the acid removes metal from the surface ... | 05/17/2005 |
| 6824702 | Device and method for producing molten salts and use thereof The invention relates to an apparatus and a process for the preparation of salt melts, and mixtures thereof, by means of a stirred reactor and a tubular reactor, in which the starting materials are melted and brought to reaction, and the reaction products are subseq... | 11/30/2004 |
| 6585929 | Direct smelting vessel A direct smelting vessel which is adapted to contain a molten bath of metal and slag is disclosed. The vessel includes an off-gas duct that has: (a) a first section which has a relatively slight upward inclination to the horizontal from an inlet end of the fir... | 07/01/2003 |
| 6419724 | Method for reducing iron oxides and for melting iron and installations therefor An apparatus for producing liquid pig iron, including an iron oxide reducing furnace, a melting furnace positioned to receive and melt iron oxides reduced in the reducing furnace, a pig iron discharge device associated with the melting furnace, a slag dis... | 07/16/2002 |
| 6406662 | Rotary hearth furnace with charge slot air shield An apparatus for charging feed material through an opening into a furnace has a fixed structure and a moveable door. The moveable door together with the fixed structure defines the opening. The moveable door is mounted for movement toward and away from th... | 06/18/2002 |
| 6403022 | Device for the direct reduction of iron oxides Device for the direct reduction of iron oxides of the type with a gravitational load, comprising a reactor defining, in its upper part, at least a zone inside which the reduction reaction occurs, means (14, 15) to introduce the load through a mouth (12) o... | 06/11/2002 |
| 6391249 | Device for producing sponge iron A device for producing sponge iron from iron oxide lumps consists of a reduction shaft in which a hot dust laden reducing gas is delivered. The gas is produced in a gas generator by means of partial oxidation of solid carbon carriers and passes into the l... | 05/21/2002 |
| 6368548 | Direct smelting process and apparatus A direct smelting process for producing metals from metalliferous feed material is disclosed. The process includes forming a molten bath having a metal layer and a slag layer on the metal layer and smelting injected metalliferous feed material in the meta... | 04/09/2002 |
| 6290897 | Pumpless silver recovery system A simple and reliable silver recovery system including a series of silver recovery processing containers through which solution flows by gravity to a waste container. The reservoir container holding a silver-rich solution is positioned above the processin... | 09/18/2001 |
| 6241515 | Device and method for treating combustibles obtained from a thermal processing apparatus and apparatus employed thereby A device adapted for attachment to a thermal processing furnace, the device includes a housing having first and second openings with a chamber located therebetween, the second opening is operatively connected to a thermal processing furnace and in communi... | 06/05/2001 |
| 6235235 | System for extracting sodium metal from sodium hydroxide and a reductant of natural gas An apparatus and system for its use for a continuous production on an alkali metal, preferably sodium metal, by a reduction of the metal hydroxide with methane or natural gas as a reductant. The invention is preferably utilized with sodium hydroxide as is... | 05/22/2001 |
| 6200522 | Method and apparatus for smelting iron ore Method and apparatus for smelting iron ore in which iron ore is preheated and partly reduced within a first reaction zone and then further reduced in a second reaction zone. The first reaction zone can be a shaft reduction furnace and the second reaction ... | 03/13/2001 |
| 6168752 | Process for producing metal powders and apparatus for producing the same A process for producing metallic powders a chlorination step for continuously producing chloride gas of metal by reacting metal with chlorine gas, and a reduction step for continuously reducing the metallic chloride gas by reacting the metallic chloride g... | 01/02/2001 |
| 6149859 | Gasification plant for direct reduction reactors The present invention is an integrated process and apparatus for supplying at least a portion of the reducing gas feedstock to a reduction reactor, such as a reactor for the direct reduction of iron, wherein the reducing gas contacts a feed material at a ... | 11/21/2000 |
| 5976219 | Method and apparatus for recycling of scrap metal A process for the recycling of scrap metal, such as copper wire, comprises the steps of combining the scrap metal with a concentrate of a metal similar to the scrap metal in a pressure vessel (10) and subjecting the metal concentrate to pressure oxidation... | 11/02/1999 |
| 5858060 | Magnetic separation method for iron carbide A method for purifying iron carbide begins by feeding ore to a reaction chamber. A mixture of iron, iron oxides, gangue, and iron carbides is extracted from the reaction chamber. The temperature of the mixture is then adjusted to a range of 400°-500° C.... | 01/12/1999 |
| 5611989 | Method for producing easily volatile materials The invention relates to a method to be used in producing easily volatile metals from their sulfides. The method employs two closely connected furnaces, a reduction furnace and a converter, which are operated at normal pressure, so that the material trans... | 03/18/1997 |
| 5535992 | Apparatus and method for acidic leaching of lateritic ores The invention provides an autoclave configuration for pressure leaching lateritic ores at elevated temperatures. The autoclave configuration includes at least one primary autoclave. The primary autoclave includes a slurry inlet port for receiving slurries... | 07/16/1996 |
| 5476248 | Apparatus for producing high-purity metallic chromium There is proposed a novel method for manufacturing high-purity metallic chromium that can eliminate the problems of reduced heating capability of the furnace, contamination of produced metallic chromium and other disadvantages related to the operation of ... | 12/19/1995 |
| 5044613 | Uniform and homogeneous permanent magnet powders and permanent magnets Method and apparatus for forming rare-earth magnets and magnet precursors of fine particle sized metal alloy powders with a high degree of metal to metal intimacy and homogeneity in the particle to particle metal composition. Salts of the desired metals w... | 09/03/1991 |
| 4893790 | Apparatus for producing metal zirconium by the reduction of zirconium tetrachloride The invention concerns a process for the production of metal Zr by means of molten Mg in a reactor 1 having a hearth plate 3, comprising separating the magnesium chloride formed in the reduction reaction from the metal Zr formed. The process is characteri... | 01/16/1990 |
| 4814003 | Apparatus and method for extraction and recovery of precious metal using coherent radiation Apparatus and method for extracting and recovering precious metals from source materials, such as ore materials, incorporating these components, includes conditioning the ore to have particle dimensions less than a predetermined size. The resulting partic... | 03/21/1989 |
| 4668287 | Process for producing high purity zirconium and hafnium This is a process for producing high quality zirconium or hafnium sponge. It is especially useful for producing the very high purity zirconium which may be used to line the inner surface zirconium of Zircaloy tubing for nuclear fuel rods. The process uses... | 05/26/1987 |
| 4577838 | Treatment of pelletized iron ores A system for providing thermal and chemical energies for the production of pelletized iron ore concentrates while allowing a reduction of a portion of the material in process. The material in process is introduced as ore fines, pelletized and fired in an ... | 03/25/1986 |
| 4565354 | Apparatus for producing purified refractory metal from a chloride thereof An apparatus and a method for producing purified refractory metal from a chloride thereof, comprising: a conversion/evaporation chamber, defined by a first substantially cylindrical vessel means and a first detachable top thereover, said top comprising th... | 01/21/1986 |
| 4561886 | Method of heating, melting and coal conversion and apparatus for the same A method of and an apparatus for heating, melting and production of gaseous fuel include supplying air, coal, steam into a melt. The melt contains elements readily oxidized by air. These elements produce oxides readily reduced by carbon. The overall resul... | 12/31/1985 |
| 4527778 | Apparatus for production of refractory metal from a chloride thereof An apparatus and method for production of refractory metal from a chloride thereof, comprising a conversion assembly and a purification assembly, the former in turn comprising: an elongated vertical cylindrical member with an open top and a closed bottom,... | 07/09/1985 |
| 4512557 | Apparatus for preparing high-melting-point high-toughness metals An improved apparatus for preparation of high-melting-point high-toughness metals comprising a reaction chamber in which a halide of said metal is reacted with an active metal and the remaining active metal and the produced active metal halide are vaporiz... | 04/23/1985 |
| 4389247 | Metal recovery process A process for recovering a metal in its elemental state from an oxide or salt of the metal comprising passing the metal oxide or salt and a reducing gas concurrently downward through a packed bed at a temperature above the melting point of the metal in it... | 06/21/1983 |
| 4372540 | Apparatus for oxygen sprinkle smelting of sulfide concentrates A horizontal furnace for converting nonferrous metal sulfide concentrates to a molten matte has a plurality of vertically disposed burners along the longitudinal axis of the furnace roof, the burners spaced from each other, means for introducing oxygen-ri... | 02/08/1983 |
| 4307872 | Apparatus for reducing ore Ore taken from the group consisting of low-grade manganese ore ferromanganese ore and chromium ore is reduced in an electric arc furnace having two melting zones divided by a barrier. Ore and a small quantity of carbon are melted in the first zone and ore... | 12/29/1981 |
| 4245822 | Process for the production of aluminium A process for the production of aluminium in two steps: and Reaction (ii) takes place in a materials addition chamber and reaction (iii) in a high temperature chamber. Slag is circulated between the chambers via conduits by the action of gas generated in react... | 01/20/1981 |
