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| Number | Title | Issue Date |
| 8057734 | Producing metal and carbon dioxide with hydrogen recycle Offgas containing carbon dioxide and carbon monoxide that is produced in the reduction of ores and other metal oxides in a reactor is treated to reduce its carbon dioxide content and is then contacted with metal oxide to reduce the oxidation state of the metal and o... | 11/15/2011 |
| 7968045 | Installation for production of secondary steel based on scrap An installation for production of the secondary steel based on scrap in which the scrap (10) is fed in a scrap preheater (2) through a charging device (1), is preheated there and, finally, is brought into a smelting unit (3) and is melted... | 06/28/2011 |
| 7393496 | Method and apparatus for increasing the capacity of a waste heat boiler in a metallurgic smelting furnace The invention relates to a method for increasing the capacity of a waste-heat boiler (1) processing gases obtained from a metallurgic smelting furnace, such as a flash smelting furnace, and for reducing dust accretions, where liquid is added into the waste-he... | 07/01/2008 |
| 7022296 | Method for treating flue gas A multiple-field precipitator, flue-gas treating device, in accordance with the principles of the invention, includes a first section having a dual-function, sensible-cooling heat exchanger/electrostatic precipitator, a second section having a wet electrostatic prec... | 04/04/2006 |
| 6955140 | Method and apparatus for increasing the capacity of a waste heat boiler in a metallurgic smelting furnace The invention relates to a method for increasing the capacity of a waste-heat boiler (1) processing gases obtained from a metallurgic smelting furnace, such as a flash smelting furnace, and for reducing dust accretions, where liquid is added into the waste-he... | 10/18/2005 |
| 6797229 | Apparatus for removing dust accretions from a smelting furnace The invention relates to an apparatus for mechanically breaking up and detaching dust accretions created by process gases and accumulated on the inner walls of a suspension smelting furnace and/or a waste heat boiler permanently connected to the suspension smelting ... | 09/28/2004 |
| 6689309 | Apparatus for clearing dust accretions in connection with a smelting furnace An apparatus for clearing dust accretions in connection with a smelting furnace, particularly in the contact area between the uptake shaft and waste heat boiler of a flash smelting furnace. The apparatus comprises a wall element (1) arranged in the area (... | 02/10/2004 |
| 6569377 | Plant for the direct reduction of particulate iron-oxide-containing material In a process for the direct reduction of particulate iron-oxide-containing material by fluidization, a synthesis gas is introduced as a reducing gas into several fluidized bed zones consecutively arranged in series. The reducing gas is conducted from one ... | 05/27/2003 |
| 6551548 | Apparatus for producing reduced iron and compact drying An apparatus for producing reduced iron, and a compact drying method for application to the apparatus are disclosed. The apparatus comprises a pelletizer or a briquetter for mixing and agglomerating coal as a reducing agent and iron ore as iron oxide to f... | 04/22/2003 |
| 6383444 | Process for processing of reduction gas in a process for the reduction of gas 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... | 05/07/2002 |
| 6235236 | Apparatus for treating emissions of manufacturing plants An emission treatment apparatus for manufacturing plants including an inlet duct, a decantation chamber and an outlet duct. The emission treatment apparatus advantageously includes elements located inside of the decantation chamber for rendering uniform t... | 05/22/2001 |
| 6228144 | Method for operating waste heat boiler in flash-smelting furnace In a copper flash-smelting works, forced oxidation of dust is prevented, adhesion of dust to a boiler water tube is reduced, and on-line ratio and productivity index is improved. The temperature at the WHB radiation section outlet is greatly reduced and t... | 05/08/2001 |
| 6200518 | Melt-reducing facility and method of operation thereof A melt-reducing facility for directly producing molten iron or molten pig iron by throwing iron bearing material, carbon material and flux into furnace bodies and blowing pure oxygen and/or an oxygen-rich gas therein, wherein a waste heat boiler and a pow... | 03/13/2001 |
| 6039916 | Apparatus 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... | 03/21/2000 |
| 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 |
| 6007761 | Heat treating furnace for a continously supplied metal strip A continuous heat treating furnace in which heat is efficiently recovered from the combustion exhaust gas from the heating section of a continuous annealing furnace. The continuous annealing furnace of the metal strip is a heating furnace or a heating dev... | 12/28/1999 |
| 5730813 | Process for annealing an annealing charge and suitable annealing furnace Annealing is performed in the annealing chamber (2) of the annealing furnace (1) under a protective gas atmosphere. A partial-stream cleaning device (3) for the protective gas is connected to the annealing chamber. The protective gas can be cooled, the co... | 03/24/1998 |
| 5520372 | Process and device for preheating scrap A process and installation for preheating scrap containing organic matter, in which flue gas is afterburned in an afterburner combustion chamber at a temperature at more than 1200° C. The after-burned hot flue gases are guided, without being cleaned, via... | 05/28/1996 |
| 5505434 | Method and apparatus for improving heat and dust recovery in a waste heat boiler The invention relates to a boiler construction successive to a smelting furnace, particularly a flash smelting furnace, whereby a direct flow from the radiation section of a waste heat boiler to the convection section thereof is prevented by means of an i... | 04/09/1996 |
| 5489085 | Waste-gas piping for a filter dust melting furnace In a filter dust melting furnace, the waste gases occurring in the interior (9) of the furnace are conducted outward through a waste-gas line (5) in the furnace top. Provided in the course of the waste-gas line is a quench (20) for the abrupt cooling of t... | 02/06/1996 |
| 5474280 | Apparatus 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... | 12/12/1995 |
| 5431373 | Method and apparatus for increasing the efficiency of a waste heat boiler The invention relates to a waste heat boiler construction provided in succession to a suspension smelting furnace, particularly a flash smelting furnace, in which construction the dust-bearing gases created in the suspension smelting furnace are prevented... | 07/11/1995 |
| 5374298 | Copper smelting process There is disclosed a copper smelting process. At first, blister copper is produced in a blister copper-producing facility. Then, the blister copper is caused to flow through blister copper launders into one of anode furnaces, and refined into copper of hi... | 12/20/1994 |
| 5326081 | Method and apparatus for cooling hot gases A method and apparatus for cooling the exhaust gases from a molten phase furnace, such as a smelting furnace. The exhaust gases are conveyed from the furnace to a vertically extending cooling shaft disposed above the furnace, where the exhaust gases are i... | 07/05/1994 |
| 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 |
| 5201941 | Process for introducing additive substances which are capable of flow into a metallurgical vessel and a vessel for that process For the metallurgical treatment of a molten metal bath (1) in a metallurgical smelting and refining vessel (3), additive substances (43) which are capable of flow, in particular lime, are supplied in a granular to dust state, at least during a part of the... | 04/13/1993 |
| 5110350 | Method of reducing iron ore A process for the gaseous reduction of iron ore to sponge in a vertical shaft, moving bed reactor wherein a hot gaseous mixture of hydrogen and carbon monoxide generated by the internal steam reformation of gaseous hydrocarbon(s), preferably methane or na... | 05/05/1992 |
| 4985068 | Method and apparatus for smelting iron oxide Energy for melting iron oxide or wustite is supplied by pre-heated natural gas which is combusted with oxygen in gaseous form and the oxygen contained in the preheated feed materials. Such combustion produces carbon monoxide and hydrogen gas, thus the com... | 01/15/1991 |
| 4981285 | Gas-fired steelmelting apparatus Process and apparatus for the rapid efficient melting of solid ferrous metal scrap without direct exposure to water vapor, carbon dioxide, oxygen or oxygen-containing gases, using natural gas and/or other caloric gaseous fuels. The apparatus includes a fu... | 01/01/1991 |
| 4934665 | Apparatus for preparing binderfree hot briquettes for smelting purposes The present invention relates to an apparatus for preparing binder-free hot briquettes for smelting purposes consisting of iron-containing pyrophorous finely divided solids. Before briquetting, the finely divided solids are blown-through by means of a ris... | 06/19/1990 |
| 4908058 | Method and apparatus for reducing dust accretions while treating gases in a smelting furnace The invention relates to a method and apparatus for reducing dust accretions while treating exhaust gases containing sulphur dioxide in smelting furnaces. According to the invention, on the roof (10) of a waste heat boiler connected to a smelting furnace ... | 03/13/1990 |
| 4880459 | Method of and apparatus for reducing iron oxide to metallic iron This invention relates to a method and apparatus for reducing iron oxide to metallic iron, utilizing a continuous process employing a reducing gas with high hydrogen and carbon monoxide content made by a catalytically reforming mixture of hydrocarbons, re... | 11/14/1989 |
| 4878654 | Method for cooling gases and/or vapors from non-ferrous metal treatment plants, and the relative apparatus A method and apparatus for cooling gases and/or vapors from non-ferrous metal treatment plants, wherein gases and/or vapors which develop in the treatment region are passed parallel to a heat transfer surface consisting of one or more sets of vertical tub... | 11/07/1989 |
| 4861369 | Process for gaining electric energy in addition to producing molten pig iron and an arrangement for carrying out the process To gain electric energy in addition to producing molten pig iron, from lumpy iron ore and solid fuels, by using a direct reduction zone for the reduction of the iron ore to sponge iron and a meltdown-gasifying zone for the production of molten pig iron, c... | 08/29/1989 |
| 4830093 | Method and apparatus for utilizing waste heat in a combustion system An improved method and apparatus for recovery of waste heat of the type having a first heat exchanger which transfers heat to a working fluid and a second heat exchanger which transfers heat from the working fluid is disclosed. The improvement comprises t... | 05/16/1989 |
| 4775392 | Coal gasification installation The installation comprises mainly a reactor (1) for the gasification of powdered coal on a bath (2) of liquid iron, a cooling flue (9) constituting a boiler connecting the outlet of the reactor (1) to a vapor superheater (11) fed with vapor (26) issuing f... | 10/04/1988 |
| 4775134 | Arrangement for preheating scrap An arrangement for preheating scrap includes a scrap treating furnace into which at least one exhaust gas duct from a metallurgical furnace enters. In order to attain a higher efficiency in preheating, the scrap treating furnace has a through chamber for ... | 10/04/1988 |
| 4718643 | Method and apparatus for rapid high temperature ladle preheating This invention relates to ladle heating methods and apparatus. More particularly, this invention pertains to rapid high temperature ladle preheating utilizing an optimized heating cycle by involving oxygen and combustion air preheated by recuperation in t... | 01/12/1988 |
