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| Number | Title | Issue Date |
| 7931731 | Process for production of elemental iron A process to prepare elemental iron by contacting an iron ore feed with a reducing gas at a pressure of between 1 and 10 bar to obtain iron and an off-gas includes preparing the reducing gas by performing the following steps: (a) partially oxidizing a mixture compri... | 04/26/2011 |
| 7854786 | Reduction process and plant Reduction process and relative plant for the production of metallic iron by means of the direct reduction of iron ore, in which a reduction shaft is connected to a source of reducing gas obtained from the gasification of coal. The process advantageously comprises a ... | 12/21/2010 |
| 7232542 | Preheating cold blast air of a blast furnace for tempering the hot blast temperature An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a suppl... | 06/19/2007 |
| 7090179 | Mounting assembly for a waste line of a medical treatment apparatus A mounting assembly for a discharge conduit of a medical treatment device, such as a dialysis machine. The mounting assembly has a connector member detachably engageable with a discharge nozzle of a discharge conduit and a suction cup that can be mounted on a rim of... | 08/15/2006 |
| 6797034 | Method of producing reduced metals and apparatus for reducing metal oxides A method of producing reduced metals is disclosed in which a mixture of a metal oxide and a reducing agent is heated by a burner such that the metal oxide is reduced to a reduced metal. Dry-distilled gas generated during carbonization of an organic matter-containing... | 09/28/2004 |
| 6562103 | Process for removal of carbon dioxide for use in producing direct reduced iron The present invention relates to a pressure swing adsorption process for direct reduction of iron wherein a portion of spent reducing gas withdrawn from the direct reduction reactor is subjected to a PSA process for the removal of carbon dioxide from the ... | 05/13/2003 |
| 6506230 | Method for increasing productivity of direct reduction process An improved method and apparatus for increasing the productivity of a direct reduction process in which iron oxide is reduced to metallized iron by contact with hot reducing gas; comprising the steps of: a) providing a first hot reducing gas consisting es... | 01/14/2003 |
| 6475264 | Direct smelting process A process for direct smelting a metalliferous feed material is disclosed. The process includes the steps of partially reducing metalliferous feed material and substantially devolatilising coal in a pre-reduction vessel and producing a partially reduced me... | 11/05/2002 |
| 6395057 | Method for producing directly reduced iron in a layered furnace A method for producing reduced iron in a layered furnace which includes several superimposed layers. Ore is continuously fed into the layered furnace, deposited on the uppermost layer, and gradually transferred to the lower layer. A reducing agent is depo... | 05/28/2002 |
| 6395056 | Method for the heat treatment of iron ore lumps in a reduction system A method and apparatus for the production of prereduced iron ore, DRI, sponge iron or the like by the gaseous reduction of iron-oxide containing particles in a reduction system which comprises a preheating device for the iron ore particles. The preheating... | 05/28/2002 |
| 6379420 | Method and plant for producing a reducing gas serving for the reduction of metal ore In a method for producing a hot CO- and H2 -containing reducing gas serving for the reduction of fine-grained metal ore, in particular iron ore, the reducing gas is formed in a gasification zone by a gasification of carbon carriers, in particul... | 04/30/2002 |
| 6361757 | Catalyst for manufacturing hydrogen or synthesis gas and manufacturing method of hydrogen or synthesis gas This invention provides a catalyst for producing hydrogen gas from a mixed gas comprising dimethyl ether and water vapor or carbon dioxide gas, which comprises copper, iron, cobalt, palladium, iridium, platinum, rhodium, or nickel as an active component, ... | 03/26/2002 |
| 6355088 | Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags A method of upgrading relatively rich, fine-grained earthy hematite iron ores is provided. The iron ore, after suitable preparation, is reduced using a solid state reduction technique. As a result of the reduction process, the iron grains undergo size enh... | 03/12/2002 |
| 6293992 | Method and device for processing reducing gas for reducing ores A process to optimize the reduction process with a given quality of ore. The reduction gas 7 is analyzed by means of gas sensor 1 and is separated into two partial flows. The throughput of the partial flow which is oxidized is regulated by a regulation va... | 09/25/2001 |
| 6224649 | Method and apparatus for reducing iron-oxides-particles having a broad range of sizes Methods and apparatus for the reduction into metallic iron of iron-oxides-containing particles having a broad range of sizes. Particles, typically within a broad range of sizes of about 0.1 mm to about 50 mm, are reduced by contact with a hot reducing gas... | 05/01/2001 |
| 6214082 | Process for the reduction of metal-oxide-bearing material The invention relates to a process for the reduction of metal-oxide-bearing material, particularly of iron ore, in a reduction vessel (1), wherein the metal-oxide-bearing material is charged from a vessel (2) for the metal-oxide-bearing material into the ... | 04/10/2001 |
| 6197087 | Pyrolysis of halogenated organic hazardous wastes with direct reduction of iron oxides Disposal of halogenated organic hazardous wastes by introducing them as feedstocks in the direct reduction of iron oxide (DRI). (DRI is described in Pat. RE.32247.) The novel hydrocarbons used as reducing feedstocks would normally be destined to become ha... | 03/06/2001 |
| 6152984 | Integrated direct reduction iron system A system for producing directly reduced iron integrated with a turbine power generator and preferably a cryogenic air separation plant wherein off-gas from the direct reduction drives the turbine and preferably oxygen from the air separation plant is used... | 11/28/2000 |
| 6132489 | Method and apparatus for reducing iron-oxides-particles having a broad range of sizes The present invention describes a method and apparatus for the reduction into metallic iron of iron-oxides-containing particles having a broad range of sizes. Particles, preferably within a broad range of sizes smaller than about 3.2 mm, are reduced by co... | 10/17/2000 |
| 6048382 | Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags A method of upgrading relatively rich, fine-grained earthy hematite iron ores is provided. The iron ore, after suitable preparation, is reduced using a solid state reduction technique. As a result of the reduction process, the iron grains undergo size enh... | 04/11/2000 |
| 6045602 | Method for integrating a blast furnace and a direct reduction reactor using cryogenic rectification A method for increasing iron production by integrating blast furnace ironmaking with direct reduction ironmaking wherein cryogenic rectification links the two systems and produces input materials for both.... | 04/04/2000 |
| 6033456 | Integration of partial oxidation process and direct reduction reaction process The present invention relates to an integrated process and apparatus for supplying at least a portion of, or substantially all, or all of the reducing gas feedstock to a reduction reactor, such as a reactor for the direct reduction of iron, wherein the re... | 03/07/2000 |
| 6027545 | Method and apparatus for producing direct reduced iron with improved reducing gas utilization A method and apparatus for producing DRI, prereduced materials, or the like, utilized in the steelmaking industry, where hydrogen contained in the gas stream purged from the reduction reactor is separated (preferably by means of a PSA system) and recycled... | 02/22/2000 |
| 6004373 | Method for producing iron carbide A method for producing iron carbide by bringing iron ore into contact with a reducing gas containing hydrogen and a carbon compound at a high reaction temperature and at a reaction pressure of the atmospheric pressure or more to reduce and carburize the i... | 12/21/1999 |
| 5997608 | Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process In a process for the production of molten pig iron or molten steel pre-products and sponge iron from charging materials consisting of iron ore and, if desired, fluxes, direct reduction of the charging materials to sponge iron is carried out in a fixed-bed... | 12/07/1999 |
| 5958107 | Shift conversion for the preparation of reducing gas A method of shift conversion of CO to H2 so that the level of gas can be reduced to a level that preheating for direct reduction to 800 to 900° C. can be accomplished wherein carbon deposition is not a factor.... | 09/28/1999 |
| 5871560 | Process and plant for the direct reduction of iron-oxide-containing materials A direct reduction process is disclosed for iron oxide-containing materials. Synthesis gas is mixed with top gas produced during direct reduction of the iron oxide-containing materials and is used as reduction gas for directly reducing and heating the iro... | 02/16/1999 |
| 5858058 | Process and plant for avoiding metal dusting in the direct reduction of iron-oxide-containing materials A direct reduction process is disclosed for iron-oxide-containing materials. Synthesis gas is mixed with top gas produced during direct reduction of the iron-oxide-containing materials and is used as reduction gas for directly reducing iron-oxide-containi... | 01/12/1999 |
| 5858057 | Method for producing direct reduced iron with a controlled amount of carbon Method and apparatus for the production of prereduced iron ore, Direct Reduced Iron (DRI), or the like, in an ironmaking plant wherein the reducing gas utilized in the chemical reduction of iron oxides is generated from natural gas within the reduction re... | 01/12/1999 |
| 5855643 | Direct reduction process for iron oxide-containing materials In a process for the direct reduction of iron-oxide containing material, synthesis gas is mixed with top gas formed in the direct reduction of the iron-oxide containing material and is used as a reducing gas for direct reduction. In order to avoid metal d... | 01/05/1999 |
| 5840097 | Method for direct reduction of oxides A method for direct reduction of oxides includes the steps of: providing a reduction zone for direct reduction of oxides and a gas reforming zone communicating with the reduction zone; feeding metal oxides to the reduction zone; feeding a gas mixture comp... | 11/24/1998 |
| 5837031 | Method for producing iron carbide An apparatus and method of producing iron carbide of predetermined quality is disclosed. The method of producing iron carbide (Fe3 C) comprises reducing and carburizing an iron-containing raw material containing iron oxides (e.g., hematite) or ... | 11/17/1998 |
| 5824134 | Direct reduction of iron ore utilizing organic hazardous materials The use of and methods to use a novel category of hydrocarbon for direct reduction of iron ore. The novel hydrocarbons used as reducing feedstocks would normally be destined to become hazardous wastes or else their products of decomposition would be hazar... | 10/20/1998 |
| 5810906 | Method for preheating feed materials for the production of iron carbide The present invention provides a two-stage method for pretreating an iron oxide-containing feed material prior to conversion of the material into an iron carbide-containing product. The feed material is heated in the first stage in an oxidizing atmosphere... | 09/22/1998 |
| 5733357 | Process for converting iron oxide to iron carbide employing internally generated carbon oxide as the carbiding agent A process for converting iron oxide to iron carbide using hydrogen as a reducing gas. Water is generated by the reduction of the iron oxides using hydrogen. The amount of water present in the reactor system is controlled and the water is contacted with me... | 03/31/1998 |
| 5683489 | Method of producing iron carbide A method for producing iron carbide by bringing iron ore into contact with a reducing gas containing hydrogen and a carbon compound at a specified reaction temperature to reduce and carburize the iron ore with the participation of a sulfur component, the ... | 11/04/1997 |
| 5643354 | High temperature oxygen production for ironmaking processes A direct ironmaking process in which coal and oxygen are used directly for reducing ore and smelting the resulting sponge iron wherein a high-temperature ion transport membrane process recovers oxygen for use in the ironmaking process. Heat for oxygen rec... | 07/01/1997 |
| 5558696 | Method of direct steel making from liquid iron The disclosure describes a method of direct steel making wherein liquid iron is produced in a melter gasifier system using a solid fuel reductant, preferably petroleum coke, and low silica containing iron ore, preferably less than 2.0% by weight, and the ... | 09/24/1996 |
| 5529599 | Method for co-producing fuel and iron A method for the co-production of fuel and iron from coal and from iron ore respectively, which is comprised of heating the coal in the absence of oxygen to make a raw coal gas and a residual coke, and of increasing the content of free hydrogen in the coa... | 06/25/1996 |
| 5500034 | Method for preheating a reactor feed A method and apparatus for preheating a reactor feed, comprised of an iron ore (10) and a process gas (21), in an iron carbide process for making steel is provided. The apparatus comprises a process gas preheater (40) having a furnace (56) and a heat exch... | 03/19/1996 |
