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| Number | Title | Issue Date |
| 7341658 | Recovery of heavy minerals from a tar sand A process for recovering heavy minerals (e.g., titanium minerals such as TiO2) from a feedstock comprising tar sands or a tar sands-derived solids fraction. The feedstock comprises bitumen and heavy minerals. The process comprises the steps of: (i) contac... | 03/11/2008 |
| 6692549 | Methods for integration of a blast furnace and an air separation unit The present invention generally relates to processes and apparatuses for the integration of a blast furnace and an air separation plant to increase blast furnace production. The present invention recovers energy from the air separation through the expansi... | 02/17/2004 |
| 6592646 | Method of producing direct reduced iron with use of coal-derived gas and apparatus In a method of producing direct reduced iron with use of a coal-derived gas, coal is heated to lower the moisture thereof, and the moisture-lowered coal is gasified in a coal gasification furnace to produce a coal-derived gas containing a reducing gas. Th... | 07/15/2003 |
| 6572674 | Process for the treatment of steel work gases Steel work gases (blast-furnace gases, coke-oven gases, converter gases, etc.) are burnt with an exhaust gas from a gas turbine, optionally with a supply of natural gas and of air, in a postcombustion section between the outlet of the gas turbine and the ... | 06/03/2003 |
| 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 |
| 6379422 | Direct smelting process A process for direct smelting metalliferous feed material is disclosed. Iron oxides are partially reduced in a solid state in a pre-reduction vessel. The partially reduced iron oxides are smelted to molten iron in a direct smelting vessel which contains a... | 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 |
| 6306195 | Process for the preparation of high grade synthetic rutile and pig iron The present invention relates to an improved process for the preparation of high grade synthetic rutile from ilmenite with pig iron as a by-product. The process comprises subjecting ilmenite to reduction with coal, cooling and removing unreacted coal to o... | 10/23/2001 |
| 6251160 | Method of de-chroming and/or depleting the MgO content of steel slag In a process for dechroming, and/or depleting the MgO content of, steel slags, oxygen is introduced into the liquid steel slag to an extent sufficient for converting iron quantitatively to iron oxide and at least 5% by weight of the iron oxide contained i... | 06/26/2001 |
| 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 |
| 6068677 | Method for processing waste or waste fractions, in particular car shredder light fractions The method for processing waste or waste fractions, such as, for example, household refuse, car shredder light fractions or the like, provides for pyrolysis, gasification and/or combustion, whereupon the residues are melted under reducing conditions. The ... | 05/30/2000 |
| 6053961 | 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 ... | 04/25/2000 |
| 6051048 | Production of fuel gas A first, solid, carbon-containing fuel is gasified and iron is melted in a gasifier-melter. A first flow of resulting fuel gas is employed to form the iron in a vertical shaft furnace by direct reduction of iron ore. A second flow of resulting fuel gas is... | 04/18/2000 |
| 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 |
| 6030430 | Blast furnace with narrowed top section and method of using Described herein is an Improved Converter System designed to help reduce air, land and water pollution by completely converting materials that presently cause pollution into clean burning fuels and a host of other products beneficial to mankind. The prima... | 02/29/2000 |
| 5653182 | Method for neutralizing waste Method for neutralizing waste, such as powder from luminescent tubes and similarly, residue from incineration of household waste, optionally comprising environmentally hazardous components, such as Hg, Cd, Zn, Co or Ba. The waste is fed into a melting fur... | 08/05/1997 |
| 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 |
| 5630862 | Method of providing fuel for an iron making process The invention provides a method for both disposing of an environmentally undesirable material comprising petroleum coke and the sulfur and heavy metals contained therein and of providing fuel for a process of making molten iron or steel preproducts and re... | 05/20/1997 |
| 5613997 | Metallurgical process Method and apparatus for performing a metallurgical process in which a carbonaceous material is converted to a reducing gas and a metal is melted in a main reactor, particulate coal is partially oxidized in a secondary reactor to form a particulate char a... | 03/25/1997 |
| 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 |
| 5496392 | Method of recycling industrial waste The present invention relates to a process for the production of metal alloys, metal oxides and slag-based products, such as mineral wool, from industrial waste materials. More specifically, the present invention relates to a process for recycling industr... | 03/05/1996 |
| 5464464 | Method for reducing particulate iron ore to molten iron with hydrogen as reductant A method for reducing particulate iron oxide and/or other iron units to molten iron utilizing gaseous hydrogen as reductant in a reducing furnace, in which the ore freely falls during the melting and reduction process. Reacted top gas is purified and reci... | 11/07/1995 |
| 5431710 | Method for continuously producing iron, steel or semi-steel and energy A fine particle mixture of iron concentrate and pulverized flux is introduced into the upper portion of the vertical prereduction section of a sealed unitary vessel. Heated gas partially reduces the iron concentrate particles to form wustite which falls t... | 07/11/1995 |
| 5397376 | Method of providing fuel for an iron making process The invention provides a method for both disposing of an environmentally undesirable material comprising petroleum coke and the sulfur and heavy metals contained therein and of providing fuel for a process of making molten iron or steel preproducts and re... | 03/14/1995 |
| 5380352 | Method of using rubber tires in an iron making process The invention provides a method for both disposing of an environmentally undesirable material comprising rubber tires and the sulfur and metals contained therein and of providing fuel for a process of making molten iron or steel preproducts and reduction ... | 01/10/1995 |
| 5364447 | Method of recycling hazardous waste A smelting process for blending hazardous and non-hazardous inorganic industrial wastes with carbon or aluminum reducing agents to simultaneously recover metal alloys (reducible metals), metal oxides (volatile reducible metals), carbon dioxide and man-mad... | 11/15/1994 |
| 5354356 | Method of providing fuel for an iron making process The invention provides a method for both disposing of an environmentally undesirable material comprising petroleum coke and the sulfur and heavy metals contained therein and of providing fuel for a process of making molten iron or steel preproducts and re... | 10/11/1994 |
| 5338336 | Method of processing electric arc furnace dust and providing fuel for an iron making process The present invention provides a method for processing environmentally undesirable materials including petroleum coke and the sulfur and heavy metals contained therein and agglomerated waste dust from an electric arc furnace and the zinc, cadmium, lead an... | 08/16/1994 |
| 5322544 | Melting a mixture of scrap metal using scrap rubber This invention relates to the melting of scrap metal containing steel in an electric arc furnace using whole scrap rubber tires as an additional source of heat. Also, scrap rubber may be pylarized to form combustibles which are fed into the electric arc f... | 06/21/1994 |
| 5320676 | Low slag iron making process with injecting coolant The invention relates to a method of making iron or steel preproducts and reduction gas with a low slag forming process utilizing petroleum coke as a fuel in a melter gasifier.... | 06/14/1994 |
| 5317862 | Air separation In a process integration, particularly with a blast furnace, nitrogen under pressure is moisturized by the addition to it of hot, pressurized water. The moisturized nitrogen is expanded and power thereby generated. The nitrogen is not mixed with combustio... | 06/07/1994 |
| 5295351 | Air separation In a process integration, particularly with a blast furnace, low grade fuel gas produced by the furnace is compressed and moisturized. The moisturized fuel is burnt using a major part of a compressed air stream to support its combustion. The resulting com... | 03/22/1994 |
| 5268019 | Air separation method and apparatus combined with a blast furnace Air is taken from the air compressor of a gas turbine including in addition to the compressor a combustion chamber and an expansion turbine. The gas turbine drives an alternator. The air taken from the compressor is cooled in heat exchanger to remove heat... | 12/07/1993 |
| 5259864 | Method of disposing of environmentally undesirable material and providing fuel for an iron making process e.g. petroleum coke The invention provides a method for both disposing of an environmentally undesirable material comprising petroleum coke and the sulfur and heavy metals contained therein and of providing fuel for a process of making molten iron or steel preproducts and re... | 11/09/1993 |
| 5259865 | Very low slag iron making process The invention relates to a method of making iron or steel preproducts and reduction in gas a substantially slag free process utilizing petroleum coke as a fuel in a melter gasifier.... | 11/09/1993 |
| 5258054 | Method for continuously producing steel or semi-steel A fine particle mixture of iron concentrate and pulverized flux is introduced into the upper portion of the vertical prereduction section of a sealed unitary vessel. Heated gas partially reduces the iron concentrate particles to form wustite which falls t... | 11/02/1993 |
| 5198190 | Method of recycling hazardous waste A method of recycling hazardous and non-hazardous industrial wastes to reclaim valuable metals, metal alloys, and metal oxides, and to produce mineral wool. Wastes including hazardous wastes of USEPA Series D, F, P, K, and U are pulverized and blended wit... | 03/30/1993 |
| 5186740 | Method for preheating scrap iron by pyrolysis of resinous residues contained therein, with total recovery of their energy content and improvement of the steelmaking cycle This method of preheating scrap iron mixed with plastic, rubber and resinous, ie organic, materials and intended for electric furnaces, in particular electric arc furnaces, is characterized by transforming the plastic, rubbery or resinous and like materia... | 02/16/1993 |
| 5124008 | Method of extraction of valuable minerals and precious metals from oil sands ore bodies and other related ore bodies A method for the extraction of valuable minerals and precious metals from oil sands ore bodies or other related ore bodies that is synergistically unique in the arrangement of processes for production of valuable minerals and precious metals in an economi... | 06/23/1992 |
| 5076837 | Air separation in combination with a chemical process A method and apparatus for recovering work from a nitrogen stream, wherein the nitrogen is preheated via heat exchange with hot fluid from a chemical process, which process utilizes the oxygen product of the air separation. Preferably at least a part of t... | 12/31/1991 |
