Class 75/448 - Carbon(C)

Subclass of Class 75 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
Definition: Process wherein the solid is Carbon (C).
No. of patents: 28
Last issue date: 10/18/2011

Number	Title	Issue Date
8038766	Direct reduction process using a single fluidised bed A direct reduction process for a metalliferous material includes supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into a fluidized bed in a vessel and maintaining the fluidized bed in the vessel, at ...	10/18/2011
7947107	Direct reduction apparatus and process An apparatus for reducing a metalliferous material in a fluidized bed includes a vessel for containing the fluidized bed, a mechanism for supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into the ves...	05/24/2011
7608128	Direct reduction process and apparatus A direct reduction process for a metalliferous material includes supplying a solid carbonaceous material and an oxygen-containing gas into a fluidized bed in a first vessel and generating heat by reactions between the oxygen-containing gas and the solid carbonaceous...	10/27/2009
7175690	Pre-treatment process for feed material for direct reduction process A pretreatment process for solid lump feed material for a gas and pellet/lump-based direct reduction process, comprising preheating feed material to a temperature of from about 200 C to about 500 C, without reduction, in a non-reducing atmosphere prior to charging t...	02/13/2007
6599374	Method for producing a mixture of iron carbide and granular, directly reduced iron An end product containing iron carbide (Fe3 C) is produced from an intermediate product consisting of granular, directly reduced iron. Said intermediate product is supplied by an iron ore reduction plant and is fed to a carburization reactor. L...	07/29/2003
6454833	Process for producing liquid pig iron or semifinished steel products from iron-containing materials In a method for producing liquid pig iron (9) or steel pre-products from fine-particulate iron-containing material (4) in a melter gasifier (1), the iron-containing material (4) is melted in a bed of solid carbon carriers (2) under supply of carbon-contai...	09/24/2002
6379426	Fluidized bed reduction of laterite fines with reducing gases generated in situ The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated in situ by adding a reducing agent such as a carbonaceous material in the fluidized bed chambe...	04/30/2002
6277171	Method of reducing the iron content of steel slag A method of reducing the iron content of starting material containing calcium, silicon and oxygen, and iron in the form of a ferrite and/or oxide, for example a steel slag, includes the steps of heating the starting material to a temperature of at least 8...	08/21/2001
6235082	Process for producing liquid metal and facilities for carrying out the process With a method for producing liquid metal from charging substances containing ore and of fluxes, the ore is directly reduced to sponge metal in at least one reduction zone (5, 7, 8), the sponge metal is melted along with fluxes in a melt-down gasifying zon...	05/22/2001
6224650	Apparatus for manufacturing molten iron by using calcination furnace, and manufacturing method therefor An apparatus for manufacturing molten iron by using a calcination furnace, and a manufacturing method therefor are disclosed. A high temperature reducing gas (1000 to 1100° C.) from a melter gasifier is used as a calcination heat in a calcination furnace...	05/01/2001
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
5938815	Iron ore refining method An iron ore refining method in which a secondary reactor is employed for partly reducing iron ore and partly oxidizing a carbon containing substance to form partly reduced secondary iron ore, the coal char and a calorific containing carbon dioxide and car...	08/17/1999
5445667	Method for reducing material containing metal oxide in solid phase A method of reducing material containing metal oxide in a circulating fluidized bed, in which coal in excess and air is introduced into the fluidization chamber so as to maintain a temperature of >850° C. in the chamber. Bed material which has been separ...	08/29/1995
5364448	Process for the production of liquid metal from fine-grain metal oxide particles and reducing and smelting furnace for carrying out the process In a process and an apparatus for the production of liquid metal (4) from fine-grain metal oxide particles, the particles, together with hot reducing gas, are blown against a heated bulk material filter layer (9) of lump coal and/or ceramic pieces, a subs...	11/15/1994
4995904	Method for the pretreatment of a lumpy carbon carrier A method is disclosed for pretreatment of a lumpy carbon carrier suitable for forming a fluidized bed and a solid bed used in the production of pig iron from iron ore. The ore is pre-reduced in at least one reduction plant and the thus produced iron spong...	02/26/1991
4895593	Process of recovering molten pig iron or steel pre-products from lumpy iron-oxide and scrap using a fluidized bed This is disclosed a process of recovering molten pig iron or steel pre-products from lumpy iron-oxide containing charging substances. The charging substances are reduced to sponge iron in a direct reduction zone, the sponge iron is smelted in a meltdown g...	01/23/1990
4806158	Process of reducing fine-grained iron-containing material by means of solid carbonaceous reducing agents Disclosed is a process for the production of reduced iron oxide-containing materials. Iron oxide and solid carbonaceous reducing agent are charged into a first expanded fluidized bed, which is supplied with an oxygen-containing fluidizing gas. The gas res...	02/21/1989
4725308	Process for producing molten pig iron or steel pre-products There is disclosed a process for the production of molten pig iron or of steel pre-products from particulate ferrous material as well as for the production of reduction gas in a meltdown gasifier. A fluidized-bed zone is formed by coke particles upon the ...	02/16/1988
4588437	Method for producing molten pig iron or steel pre-products in a melt-down gasifier There is disclosed a method and a melt-down gasifier for producing molten pig iron or steel pre-products and reduction gas. A first fluidized-bed zone is formed by coke particles, with a heavy motion of the particles, above a first blow-in plane by the ad...	05/13/1986
4360378	Direct reduction of iron oxide containing material with biofuel A new method is devised for the production of raw iron or so-called metallized iron ore. Biofuels i.e. preferably fuel wood and/or peat is in the final reduction brought into direct contact with the iron containing material in its solid state. Biofuels ha...	11/23/1982
4359212	Apparatus for reducing finely divided iron oxide material Apparatus for reducing finely divided iron oxide material, comprising a reactor containing a vertical upper reaction chamber connected downwardly to a narrower, vertical reaction chamber. A cyclone separator is connected to the upper reaction chamber for ...	11/16/1982
4224056	Direct reduction process for iron ores with fluidized bed system In a reactor, fine iron ore solids are made to descend through the fluidized bed of fine carbon bearing particles sustained within the reactor so that the fine iron ore solids may be reduced and simultaneously the reducing gas may be produced. The direct ...	09/23/1980
4147615	Hot sand-coal-cracking to hydrodistillate fuels Fuel liquids and gases from a hydrocarbonaceous material such as coal may be produced by contacting the material with an iron group metal silicide, preferably cobalt and/or iron silicide. Also, an iron group metal silicate, preferably cobalt and/or iron s...	04/03/1979
4098604	Method for reduction in a fluid bed of fine grained material containing iron oxide A method for partial reduction in a fluid bed of a fine grained iron oxide containing material whereby a fine grain low sulphur content mixture of partially reduced iron oxide containing material and coke is produced; the coke is obtained from carbonaceou...	07/04/1978
4084958	Method of reducing finely grained material containing iron oxides in a fluid bed Fine-grained iron oxide reduction in a fluidized bed; a reducing agent in the form of fine-grained solid carbonaceous material containing volatile constituents is introduced into at least one zone of the fluidized bed; in said zone the volatile constituen...	04/18/1978
4073642	Method for reducing material containing iron oxides A method of reducing a pulverized material containing iron oxides mixed with carbonaceous material wherein: (a) a circulating fluidized bed is maintained in a vertically elongated reaction zone by supplying it with suitable quantities of pulverized materi...	02/14/1978
4070181	Method for reduction of finely divided metal oxide material In the reduction of finely divided material containing metal oxide in the presence of a carbonaceous material in a reactor, a gas containing molecular oxygen is supplied to the material and a gas mixture containing carbon monoxide, hydrogen, carbon dioxid...	01/24/1978
4042376	Method for carrying out endothermic reduction processes in a circulating fluid bed and an apparatus therefor A method for endothermic reduction of solid materials in a circulating fluid bed comprising a vertically elongated reaction zone of intermediate and lower sections separated by a transport zone, wherein due to high gas velocity therein essentially all mat...	08/16/1977

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Class 75/448 - Carbon(C)