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Class 75/504 - Including consolidation of solid Carbon(C) containing material with reducible Iron(Fe) compound


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 Carbon (C) containing material
No. of patents: 43
Last issue date: 09/06/2011


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NumberTitleIssue Date
8012237Process for producing molten iron
A process for producing molten iron is a process in which while an inert gas is blown into a molten iron layer in an iron bath type melting furnace through bottom-blown tuyeres provided in a hearth bottom thereof to stir the molten iron layer, a carbon material, an ...
09/06/2011
7340420Method and system for providing information on industrial wastes, server and terminal for providing the information, recording medium for recording computer-readable program, and program allowing computer to execute process
A system provides assistance in the delivery of industrial wastes from industrial waste-generating sites to one or more industrial waste treatment sites based on exchanged information on industrial wastes containing metal oxide. The system includes a server, termina...
03/04/2008
7336692Induction furnace for melting semi-conductor materials
An induction furnace includes an induction coil, an electrically non-conductive crucible having an inner diameter disposed within the induction coil, and an electrically conductive member disposed below the crucible and having an outer diameter which is further from...
02/26/2008
7175691Method of producing stainless steel by re-using waste material of stainless steel producing process
A method of producing stainless steel includes the steps of melting a raw material in an electric furnace to form molten steel, and then refining the molten steel by a refining furnace to produce stainless steel in a stainless steel producing process. In the method,...
02/13/2007
6630010Method of producing metallic iron
The present invention is directed to a method of producing granular metallic iron, including: heating a formed raw material comprising a carbonaceous reductant and a substance containing iron oxide in a reduction melting furnace to subject the iron oxide ...
10/07/2003
6605130Pellets incorporated with carbonaceous material
Pellets incorporated with a carbonaceous material of the present invention contain a carbonaceous material and iron ore mainly composed of iron oxide. The maximum fluidity of the carbonaceous material in softening and melting, and the ratio of iron oxide ...
08/12/2003
6602320Method for producing reduced iron
A method for producing reduced iron comprises agglomerating a raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing material into small agglomerates, heating the agglomerate within a heat reduction furnace, thereby sol...
08/05/2003
6592648Reduction of iron ore in ore/coal mixtures
A process of reduction of iron ore and/or waste oxides in the form of agglomerate containing carbonaceous reductant on the hearth of a furnace includes providing a bed of agglomerates on the hearth of a furnace, the bed having a height of at least about 4...
07/15/2003
6592649Method of producing iron nuggets
The present invention provides a method of producing metallic iron nuggets with a high yield and good productivity, and more particularly a method which can produce metallic iron nuggets which have a high Fe purity and are excellent in transporting and ha...
07/15/2003
6592647Method for producing metallic iron
A method for heating, reducing and melting a raw material mixture containing carbonaceous reducing agents and an iron oxide-contained substance to manufacture metallic iron, characterized in that a liquid fraction in a solid and liquid coexisting phase of...
07/15/2003
6506231Method and apparatus for making metallic iron
A method of making metallic iron in which a compact, containing iron oxide such as iron ore or the like and a carbonaceous reductant such as coal or the like, is used as material, and the iron oxide is reduced through the application of heat, thereby maki...
01/14/2003
6475264Direct 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
6387153Stable idle procedure
A procedure for holding production of molten metal in a direct smelting process is disclosed. In situations where it is necessary to hold metal production and there is a continuing available supply of oxygen-containing gas and solid carbonaceous material,...
05/14/2002
6372016Method for drying compacts
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...
04/16/2002
6302938Reduced pellets
A carbonaceous material is controlled such that the amount of carbon is from 7 to 60 mass % based on the total amount of iron and Zn in a starting mixture comprising one or more of ducts containing iron oxide and Zn oxide and a binder in an amount to bond...
10/16/2001
6284018Method of making iron and steel
Molten iron is prepared by (1) providing iron oxide and a carbonaceous reducing agent, (2) preparing a shaped product from the carbonaceous reducing agent and the iron oxide, (3) preparing solid reduced iron from the shaped product, wherein the solid redu...
09/04/2001
6267799Method of producing metals and metal alloys
A method and an apparatus for producing metals and metal alloys from metal oxides in a metallurgical vessel containing a molten bath having a metal layer and a slag layer is disclosed. The method is characterized by injecting a carrier gas and a solid car...
07/31/2001
6264725Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method
According to a process for producing pig iron (10) from fine-particulate iron oxide carriers and lumpy iron-containing material in a meltdown gasifying zone (9) of a melter gasifier (3), the iron-containing material is melted in a bed (13) formed of solid...
07/24/2001
6241803Method for manufacturing reduced iron pellets
A method for manufacturing reduced iron pellets comprises the steps of heating iron oxide pellets incorporating carbonaceous material to yield reduced iron pellets having an apparent density of not more than 4.0 g/cm3, cooling the hot reduced i...
06/05/2001
6241804Process for producing iron briquettes and/or cold iron sponge
A process and apparatus for producing iron briquettes and/or cold iron sponge, in which charge materials (3) which contain lumpy material containing iron oxide are introduced into the reduction zone (2) of a reduction reactor (1), then a hot reduction gas...
06/05/2001
6214087Treatment of iron oxide agglomerates before introduction into furnace
A method for producing solid metal product is disclosed including the steps of providing carbon and metal bearing compounds in compacts, coating the compacts with treatment materials, encapsulating the compacts with carbonaceous containing materials to fo...
04/10/2001
6152983Method of producing reduced iron pellets
A carbonaceous material is controlled such that the amount of carbon is from 7 to 60 mass % based on the total amount of iron and Zn in a starting mixture comprising one or more of ducts containing iron oxide and Zn oxide and a binder in an amount to bond...
11/28/2000
6149709Method of making iron and steel
Molten iron is prepared by (1) providing iron oxide and a carbonaceous reducing agent, (2) preparing a shaped product from the carbonaceous reducing agent and the iron oxide, (3) preparing solid reduced iron from the shaped product, wherein the solid redu...
11/21/2000
6120577Treatment of steel mill waste metal oxides
A process of recovering iron values and separating zinc oxides and other contaminants from steel mill waste metal oxides, such as blast furnace dust, BOF dust, mill scale and oily sludges, characterized by iron metallization levels up to 95% or more and z...
09/19/2000
6083296Method of producing metals and metal alloys
A method and an apparatus for producing metals and metal alloys from metal oxides in a metallurgical vessel containing a molten bath having a metal layer and a slag layer is disclosed. The method is characterized by injecting a carrier gas and a solid car...
07/04/2000
6063156Production method of metallic iron
A method for producing a molten iron from a compact containing a carbonaceous reductant and an iron oxide is carried out extremely efficiently with a simple operation. The compact is supplied to a molten iron bath or a molten slag on the molten iron bath ...
05/16/2000
5891214Smelting reduction method with increased effectiveness
The invention relates to a method for increasing the effectiveness of the smelting reduction of oxidic metal carriers, particularly iron ore, and improving the heat efficiency of the charged fuels in the smelting reduction process which takes place in a r...
04/06/1999
5873924Desulfurizing mix and method for desulfurizing molten iron
A desulfurization composition contains from about 3% to about 20% particulate metallic aluminum, about 5% to about 30% particulate alumina, about 0.5% to about 12% particulate hydrocarbon material or other gas generating composition and the balance lime p...
02/23/1999
5873925Process for treating iron bearing material
A process for treating iron-bearing material with a carbonaceous material to form a mixture, wherein the amount of carbonaceous material added exceeds the stoichiometric amount required to reduce the metal oxide to elemental metal. In one embodiment, the ...
02/23/1999
5855645Production of more concentrated iron product from industrial waste materials streams
A method for producing a more concentrated iron product from an industrial waste materials stream comprising iron and non-iron constituents such as EAF and basic oxygen furnace dust generally comprising the steps of compacting or briquetting the waste mat...
01/05/1999
5849063Production of direct reduced iron and/or pig iron from industrial waste streams
A method for producing direct reduced iron or/and pig iron from an industrial waste materials stream such as EAF and blast furnace dust generally comprising the steps of separating the materials contained in the waste materials stream by magnetic separati...
12/15/1998
5782957Process for treating iron bearing material
A process for treating iron-bearing material with a carbonaceous material to form a dry mixture, wherein the amount of carbonaceous material added exceeds the stoichiometric amount required to reduce the metal oxide to elemental metal. In one embodiment, ...
07/21/1998
5695543Method for metal reduction of steel waste products
A method and system for recovering metal from steel waste products is disclosed. This method and system works on such hazardous and/or toxic wastes as mill scale, flue dust and slag. This method and system operates by mixing the steel waste produce with a...
12/09/1997
5665140Method for the production of iron carbide
A method for producing iron carbide for use as an iron source in steelmaking is provided. The method can use a wide range of feedstocks without depending on natural gas by using other forms of carbon as the carburizing source. The present method accomplis...
09/09/1997
5516358Method for the production of iron carbide
A method for producing iron carbide for use as an iron source in steelmaking is provided. The method can use a wide range of feedstocks without depending on natural gas by using other forms of carbon as the carburizing source. The present method accomplis...
05/14/1996
5486229Raw material for producing ferrite dust for friction elements and method of reducing the same
A raw material for producing ferrite dust for friction elements and a method of producing reduced ferrite dust, capable of using, as the raw material, various collected sludge and dust which are by-products obtained at iron factories. The sludge has solid...
01/23/1996
5350434Process and apparatus for making molten steel
The process for making a refined molten steel includes melting preheated solid iron sources and solid carbon sources in a melting vessel with heat generated by electric arc to form a carbon-containing molten material and then melting other preheated solid...
09/27/1994
4836847Method for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous
A method for the pyrometallurgical treatment of environmentally hazardous steelmill flue dust and sludges to separate and recover the volatile heavy metals from the flue dust material and to convert the remaining iron into recyclable directly reduced iron...
06/06/1989
4802919Method for processing oxidic materials in metallurgical waste
A method for processing metallurgical waste characterized by collecting metallurgical waste containing oxides of such metals as lead and zinc which when reduced form volatile and non-volatile metals; compacting a mixture of metallurgical waste, carbonaceo...
02/07/1989
4765829Treating lead- and zinc-containing steelmaking byproducts
According to the instant invention fine and very fine granular zinc- and lead-containing oxidic byproducts are mixed with thermally inert additives and are hot briquetted with caking coal as a binder at a temperature of 490°&#b1;40° C. using sufficient ...
08/23/1988
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