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Class 75/443 - Reducing in gaseous suspension


Subclass of Class 75 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
Definition: Process wherein an Iron (Fe) compound, generally in particulate
No. of patents: 21
Last issue date: 11/10/2009


NumberTitleIssue Date
7615098Method for determining sticking and flow properties of particulate solids
A method of obtaining a measure of the stickiness of heated particulate solids (40) includes pouring a sample of the particulate solids (40) onto a generally horizontal support (12) and allowing it to freely form its own angle of repose. The sam...
11/10/2009
6165250Process for the direct reduction of iron oxides
A separator for use in a direct reduction reactor comprises an elongated tubular housing having a cooling chamber for receiving a cooling medium for cooling the internal wall surface of the separator contacted by metallized iron fines....
12/26/2000
6051048Production 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
5948139Process 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 or steel pre-products from fine-particulate iron-cintaining material, in a meltdown-gasifying zone of a melter gasifier (1), under the supply of carbon-containing material and oxygen-containing gas at the...
09/07/1999
5647888Process for producing metals and metal alloys in a smelt reduction vessel
A process and a smelt reduction vessel (1) for producing metals and metal alloys, in particular iron and iron alloys, from metal oxides and ores in a smelt reduction vessel. The process and the vessel are characterized in that loss of liquid and solids wi...
07/15/1997
5489325Process for producing metals and metal alloys in a smelt reduction vessel
A process and a smelt reduction vessel (1) for producing metals and metal alloys, in particular iron and iron alloys, from metal oxides and ores in a smelt reduction vessel. The process and the vessel are characterized in that loss of liquid and solids wi...
02/06/1996
5464464Method 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
5431710Method 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
5407460Method for improving quality of reforming gas used in the direct reduction of metal oxides
A method for modifying existing direct reduction processes and retrofitting existing direct reduction facilities so as to increase the capacity of the facilities without the need for increasing the capacity of external reformers associated with the existi...
04/18/1995
5372628Method for producing reducible iron-containing material having less clustering during direct reduction and products thereof
A method for abating the incidence of cluster formation of reducible iron-containing material during the direct reduction of said material is disclosed. The method generally comprises contacting the reducible iron-containing material with a cluster-abatin...
12/13/1994
5258054Method 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
5226951Method of starting a plant for the production of pig iron or steel pre-material as well as arrangement for carrying out the method
There is disclosed a method of starting a plant for the production of pig iron or steel pre-material including a direct-reduction shaft furnace and a meltdown gasifier. At first the still empty meltdown gasifier is heated up by aid of a combustible gas an...
07/13/1993
5201940Pre-heating and pre-reduction of a metal oxide
The specification discloses a process for pre-heating and pre-reducing metal oxide ores. The process comprises introducing particles of an oxide ore entrained in a gas through a port into a treatment chamber. Inside the treatment chamber teh stream of ent...
04/13/1993
5181955Method and apparatus for heating and smelting pulverous solids and for volatilizing the volatile ingredients thereof in a suspension smelting furnace
The invention relates to a method and apparatus for raising the temperature and mixing efficiency of mainly non-combustible pulverous solid particles so high, that a desired smelting and volatilizing is achieved. The method is characterized in that the he...
01/26/1993
5078787Method and apparatus for the production of hot direct reduced iron
A method and apparatus for the gaseous reduction of particulate iron ores, wherein the ore or is fed to a vertical moving bed direct reduction reactor, reduced therein, and discharged as hot sponge iron. The ore is charged to the top portion of the reduct...
01/07/1992
4995906Method for smelting reduction of iron ore
A method for smelting reduction of iron ore, comprises the steps of: introducing iron ore into a preheat and prereduction furnace and preheating and prereducing the iron ore, a prereduction degree being less than 30%; charging the iron ore, carbonaceous m...
02/26/1991
4978106Iron reduction apparatus
A method and apparatus for reducing iron in a steelmaking process including a closed thermal transfer system in which a flow of process ingredients including iron ore is directed in a descending, preferably spiral path defined by a downwardly spiraling pi...
12/18/1990
4304595Method of manufacturing crude iron from sulphidic iron-containing material
A method of producing crude iron from sulphidic iron-containing material, where an iron sulphide containing material is charged to a furnace space and there, together with a silica containing material and oxygen, is smelted to an iron-silicate smelt durin...
12/08/1981
4215101Method and apparatus for performing chemical and/or physical treatments
A method of performing a treatment of a dust cloud includes the successive steps of generating the dust cloud from a gas and from solid particles, passing the dust cloud through a reaction zone, separating the dust cloud into its components in a separator...
07/29/1980
4179284Method for direct recovery of metal from metal-bearing ores
Iron, for example, is directly recovered from relatively fine-grained (having a grain particle size range of less than 250 microns), iron-bearing ore whereby carbon-containing materials and oxygen-containing materials are fed through a molten metal bath a...
12/18/1979
4139371Process and device for suspension smelting of finely divided oxide and/or sulfide ores and concentrates, especially copper and/or nickel concentrates rich in iron
A process for the suspension smelting of finely divided oxide and/or sulfide ores and concentrates, especially iron-rich copper and/or nickel concentrates, in which a suspension of a finely-divided feed mixture in pre-heated air and/or oxygen is fed downw...
02/13/1979
 
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