|
Match
|
Document |
Document Title |
|
|
7618476 |
Method and apparatus for cooling reduced-iron agglomerate
In a method and an apparatus for cooling a reduced-iron agglomerate in a reduced-iron agglomerate production equipment wherein an iron oxide agglomerate is reduced in a reducing furnace and...
|
|
|
7572316 |
Method for manufacturing reduced metal
A method for manufacturing a reduced metal includes thermally reducing a metal oxide including a carbonaceous reductant disposed on a hearth moving in a reducing furnace, wherein the reducing...
|
|
|
7462219 |
Production method of metal iron
A method producing metallic iron by reducing raw materials including an iron-oxide containing material and a carbonaceous reducing agent under heating, which can minimize re-oxidization of the...
|
|
|
7407526 |
Food additive
The invention concerns an iron powder for fortifying foodstuff. The powder consists of a reduced iron powder having irregularly shaped particles, wherein the iron powder has a ratio AD:PD less than...
|
|
|
7384450 |
Method for producing metallic iron
In a method of producing metallic iron by reducing and melting a raw material, which contains an iron oxide-containing material and a carbonaceous reducing agent, by heating, the raw material for...
|
|
|
7037356 |
Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities
The present invention provides a method of operation and a facility for the same suppressing the generation of dioxins in the combustion exhaust gas and efficiently reclaiming heat from high...
|
|
|
6993855 |
Method for drying compact containing metal oxide, method for reducing metal oxide, and rotary-hearth-type metal reducing furnace
The present invention provides: a method for drying compacts containing water so as not to cause explosion and powdering; a method for reducing the compacts after being dried with great efficiency...
|
|
|
6986801 |
Method of producing reduced iron compacts in rotary hearth-type reducing furnace, reduced iron compacts, and method of producing molten iron using them
There is provided a method of producing reduced iron compacts with high crushing strength, low powderization and a high reduction rate in a solid reduction-type firing reducing furnace such as a...
|
|
|
6918947 |
Method for making reduced iron
A method for making reduced iron using blast-furnace sludge is provided. The method includes a mixing step of mixing the blast-furnace sludge and an iron-oxide-containing powder to prepare a mixed...
|
|
|
6837916 |
Smelting reduction method
A smelting reduction method comprising (a) charging a carbonaceous material and an ore into a reacting furnace to directly contact the carbonaceous material and the ore; (b) reducing the ore until...
|
|
|
6814924 |
Rotary hearth furnace and screw thereof for discharging reduced iron
A rotary hearth furnace is provided to simplify detachment and assembly operations of a reduced iron discharging screw. At both side walls of an insulating housing 2 a constituting in part of a...
|
|
|
6802886 |
Method of producing a metallized briquette
The invention is a method of making metallized iron agglomerates by combining iron/steel particles and a reductant material with a cellulose fiber binder material, compacting the combination to...
|
|
|
6797034 |
Method of producing reduced metals and apparatus for reducing metal oxides
A method of producing reduced metals is disclosed in which a mixture of a metal oxide and a reducing agent is heated by a burner such that the metal oxide is reduced to a reduced metal....
|
|
|
6790255 |
Moving-hearth heating furnace and method for making reduced metal agglomerates
An annular rail 6 is fixed on the lower surface of a moving hearth 2 , and the rail 6 is supported from below by support rollers 7 provided with elevating devices 8 . The moving hearth 2 ...
|
|
|
6749664 |
Furnace hearth for improved molten iron production and method of operation
An apparatus and method for the direct reduction of iron oxide utilizes a hearth furnace having a vitreous hearth layer of conditioning materials, with the vitreous hearth layer introduced onto a...
|
|
|
6669756 |
Discharge apparatus for movable hearth type heat-treatment furnace, its operation method, and method and apparatus for manufacturing molten iron using the same
Heat-treated products discharged from a discharge port of a movable hearth type heat treatment furnace, for example a rotary hearth type reduction furnace are discharged to a sorting means, the...
|
|
|
6648942 |
Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus
The invention is a method and apparatus for iron-making/steel-making using a modified rotary hearth furnace, that is a finisher-hearth-melter (FHM) furnace. In the method the refractory surface of...
|
|
|
6630010 |
Method 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...
|
|
|
6602322 |
High temperature metal recovery process
An improved method and apparatus for recovering metal values from Electric Arc Furnace dust, particularly zinc and iron values, by mixing EAF dust and carbonaceous fines to form a particulate...
|
|
|
6602320 |
Method 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...
|
|
|
6592649 |
Method 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...
|
|
|
6592647 |
Method 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...
|
|
|
6582491 |
Method for producing molten iron in duplex furnaces
This invention relates to a method for operation of a moving hearth furnace in conjunction with an electric melter for production of high purity iron product having a range of silicon and...
|
|
|
6569223 |
Method of manufacturing molten metal iron
A method of manufacturing a molten metal iron by charging a starting material at least comprising a carbonaceous reducing material and an iron oxide-containing material into a rotary hearth...
|
|
|
6511316 |
Method of operating a rotary hearth furnace
To provide an operating method of a rotary hearth furnace for producing reduced iron in which a stuck substance stuck on the hearth surface is removed from the hearth surface to thereby prevent or...
|
|
|
6508856 |
Furnace discharge system and method of operation
A furnace discharge system for removing material from a hearth ( 18 ) of a rotary hearth furnace ( 10 ) and method of operation. The system includes at least two material discharge augers ( 28, 30...
|
|
|
6506231 |
Method 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...
|
|
|
6503289 |
Process for manufacturing molten metal iron
A process comprising: charging a raw material compacting substance containing a carbonaceous reducing agent and an iron oxide contained substance into a moving hearth type furnace; reducing the raw...
|
|
|
6488737 |
Method for reducing metallic oxides
A method for the reduction of metallic oxides and a rotating-hearth furnace. The method is for the reduction of metallic oxides in a furnace with a ring-shaped rotating hearth in which a...
|
|
|
6451084 |
Iron oxide waste agglomerates and method of assisting a steel-making operation
An iron oxide waste agglomerate, preferably a briquette, is provided including 0.03-15 weight percent on a dry basis lignosulfonate binder, 50-99.5 weight percent on a dry basis iron oxide waste,...
|
|
|
6447713 |
Rotating-hearth furnace for reduction of metallic oxides
A method for improving the direct reduction of metal oxides in a continuous furnace with a rotating hearth. The method deposits two or several layers with increasing metal oxide contents in each...
|
|
|
6413295 |
Iron production method of operation in a rotary hearth furnace and improved furnace apparatus
The present invention is an apparatus and method for the direct reduction of iron oxide utilizing a rotary hearth furnace to form a high purity carbon-containing iron metal button. The hearth layer...
|
|
|
6395057 |
Method for producing directly reduced iron in a layered furnace
A method for producing reduced iron in a layered furnace which includes several superimposed layers. Ore is continuously fed into the layered furnace, deposited on the uppermost layer, and...
|
|
|
6372016 |
Method 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...
|
|
|
6368379 |
Apparatus and method for producing reduced metal
An apparatus for producing a reduced metal includes a moving hearth reducing furnace, a feeding section, a metal discharge section, a gas discharge section, and a regenerative burner. The moving...
|
|
|
6319302 |
Method for manufacturing reduced iron agglomerates and apparatus there for
A method for manufacturing reduced iron agglomerates comprises the steps of supplying iron oxide agglomerates including carbonaceous material on a moving hearth, heating and reducing the...
|
|
|
6302938 |
Reduced 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...
|
|
|
6284017 |
Method and facility for producing reduced iron
In the method of producing reduced iron according to the invention, fine iron oxides and powdery solid reductants are mixed, compacted into sheet-like compacts, and charged onto the hearth of a...
|
|
|
6270551 |
Process for treating metal oxide fines
A process for recovering iron from iron-bearing materials including steel mill waste and iron-bearing ores. The process includes the steps of providing a mixture of iron-bearing materials having...
|
|
|
6264721 |
Method of operating rotary hearth furnace for reducing oxides
A mixed layer of fine ore and coal char and a layer of fine coal are stacked on a hearth in the form of separate layers from each other. The fine ore is reduced while fine coal is pyrolyzed to...
|
|
|
6258149 |
Method of producing reduced iron agglomerates
A method of producing reduced iron agglomerates capable of preventing oxidation in the surface layer of the agglomerates and obtaining reduced iron agglomerates having a high degree of...
|
|
|
6254665 |
Method for producing reduced iron agglomerates
A moving hearth is formed by providing a layer of hearth material primarily composed of iron oxide on a base refractory in a reducing furnace and then sintering the hearth material so that the...
|
|
|
6251161 |
Method for operating moving hearth reducing furnace
A moving hearth reducing furnace is operated, while a gap is provided between a discharging apparatus for discharging reduced iron agglomerates from the moving hearth reducing furnace and the...
|
|
|
6248152 |
Method of reducing iron oxide on a movable hearth furnace
With a solid fine reducing material containing hydrogen placed as a lower layer on a movable hearth, a powdered mixture of an oxide powder dominantly of a fine iron ore and a solid fine reducing...
|
|
|
6214087 |
Treatment 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...
|
|
|
6152983 |
Method 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...
|
|
|
6146441 |
Reducing iron oxides in rotary hearth furnace
|
|
|
6129777 |
Method of producing reduced iron agglomerates
Iron oxide agglomerates incorporated with the carbonaceous material having a particle size within a range of about 10 to 30 nm are prepared upon production of reduced iron agglomerates. Then, the...
|
|
|
6015527 |
Facility for producing reduced iron
In the method of producing reduced iron according to the invention, fine iron oxides and powdery solid reductants are mixed, compacted into sheet-like compacts, and charged onto the hearth of a...
|
|
|
5972066 |
Mixed bed iron reduction process
The present invention provides a method for producing direct reduced iron in a continuous and efficient fashion, which includes providing a mixture of a particulate iron oxide composition and a...
|