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7588625 Apparatus for manufacturing molten irons to dry and convey iron ores and additives and manufacturing method using the same  
The invention relates to an apparatus and method for manufacturing molten irons. The method for manufacturing molten irons includes providing a mixture containing iron by drying and mixing iron...
6736876 Fluidized bed breakage prevention system for fluidized bed reduction reactor and method  
A fluidized bed reduction reactor ( 100 ) for supplying a reduced iron to a melter-gasifier ( 1 ) of a smelting reduction system includes an exhaust gas supply unit ( 3 ) for supplying an exhaust...
6645269 Process and plant for producing a metal melt  
In a process for producing a metal melt by reducing metal-oxide-containing material in a fluidized-bed reactor by the fluidized-bed method and by subsequently melting down the reduced material in a...
6585798 Fluidized bed reactor for preventing the fine iron ore from sticking therein and method thereof  
A smelting reduction apparatus which separates exhaust gas, which is exhausted from a melter-gasifier or a fluidized bed reactor, into dusts and reducing gas to supply them to each fluidized bed...
6491738 2-stage fluidized bed type fine iron ore reducing apparatus, and reducing method using the apparatus  
A two-stage fluidized bed reducing apparatus and a reducing method for fine iron ore of a wide particle size distribution with an increased degree of utilization of the reducing gas. Fine iron...
6488738 Method of producing molten metal  
A combustion chamber in a melter gasifier extends into a fluidized bed to isolate fine particulate ore introduced into the chamber from the remaining internal portion of the melter gasifier. The...
6416566 Process for the production of liquid pig iron or liquid steel pre-products  
In the process for the production of liquid pig iron 943 ) or liquid steel pre-products from charging substances comprising iron ore ( 5 ) and fluxes and at least partially containing a portion of...
6379422 Direct smelting process  
A process for direct smelting metalliferous feed material is disclosed. Iron oxides are partially reduced in a solid state in a pre-reduction vessel. The partially reduced iron oxides are smelted...
6379420 Method and plant for producing a reducing gas serving for the reduction of metal ore  
In a method for producing a hot CO- and H 2 -containing reducing gas serving for the reduction of fine-grained metal ore, in particular iron ore, the reducing gas is formed in a gasification zone...
6277172 Method of charging metal carriers to a melt-down gasifying zone  
In a method of charging metal carriers which contain a portion of fines and are at least partially reduced and carbon carriers to a melter gasifier (10) in which a melt-down gasifying zone (11) is...
6273934 Method and an apparatus for producing metals and metal alloys  
A method of producing metals and metal alloys from metal oxides is disclosed. The method comprises the steps of partially pre-reducing the metal oxides to a pre-reduction degree of at least 60% in...
6264725 Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method  
6264724 Process for the production of spongy metal  
A plant for producing sponge metal, in particular sponge iron, from charging materials consisting of metal ore or iron ore respectively, preferably in lumps and/or pellets, and optionally fluxes,...
6258148 Method of charging metal carriers to a melt-down gasifying zone  
In a method of charging metal carriers which contain a portion of fines and are at least partially reduced to a melter gasifier in which a melt-down gasifying zone formed by a bed is maintained,...
6241801 Method for treating particulate material in the fluidized bed method and vessel and plant for carrying out the method  
In a method for treating particulate material in the fluidized bed method, the particulate material is maintained in a fluidized bed by a treating gas flowing from bottom to top and thereby is...
6235081 Process for the production of spongy metal  
A method for producing a sponge metal from metal ore or iron ore which comprises reacting said metal ore or iron ore in a reduction zone with a CO-- and H 2 -containing, reducing feed gas source...
6214083 Method and plant for producing iron from lumpy and fine-particulate sponge iron  
In a method of producing liquid pig iron or liquid steel pre-products from iron-oxide-containing material, fine-particulate iron-oxide-containing material is reduced to fine-particulate sponge iron...
6183534 Plant and process for the production of pig iron and/or sponge iron  
In a plant for the production of pig iron and/or sponge iron, comprising at least one fluidized bed reactor adapted to receive fine ore, a reducing-gas feed duct leading to said fluidized bed...
6174346 Duplex procedure for the production of metals and metal alloys from oxidic metal ores  
The production of highly metallized feed, an intermediate product produced solely by gaseous reductants in two stage reduction processes of that kind, encounters sticking problems, which interfere...
6149708 Process for producing sponge iron  
A process for producing sponge iron by directly reducing particulate, iron-oxide-containing material, wherein reducing gas that is formed from carbon carriers and an oxygen-containing gas in a...
6063155 Fluidized bed process for the production of iron carbide  
A process for conversion of iron oxide to iron carbide, including the steps of: providing a fluidized bed reactor having a metallizing zone and a carburizing zone; feeding iron oxide to the...
5997608 Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process  
In a process for the production of molten pig iron or molten steel pre-products and sponge iron from charging materials consisting of iron ore and, if desired, fluxes, direct reduction of the...
5961690 Process for producing molten pig iron of liquid steel preproducts and plant for carrying out the process  
In a process for producing molten pig iron or liquid steel pre-products, from particulate iron-oxide-containing material by fluidization, the iron-oxide-containing material is prereduced in at...
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...
5810905 Process for making pig iron  
A process for producing pig iron from iron ore fines wherein the fines are partially reduced in a fluid bed reactor and, without pelletizing, briquetting or otherwise agglomerating the partially...
5746805 Process for the continuous manufacture of steel  
Continuous steel making is carried out in an elongated approximately horizontal reactor by providing an iron-rich feed more than half of which is an iron-rich material containing a fine iron ore...
5676732 Method for producing direct reduced iron utilizing a reducing gas with a high content of carbon monoxide  
A method and apparatus for producing direct reduced iron using a melter-gasifier and two reduction reactors. In the first reduction reactor, iron ore is prereduced using a reducing gas from a...
5613997 Metallurgical process  
Method and apparatus for performing a metallurgical process in which a carbonaceous material is converted to a reducing gas and a metal is melted in a main reactor, particulate coal is partially...
5554206 Method of charging ore  
A method of and apparatus for charging fine-grained ore into a reactor pressure vessel through which process gas flows. The heated ore at first is introduced into a conveying pressure vessel, is...
5433767 Direct reduction of iron oxide materials with solid carbonaceous reducing agents  
In a first fluidized bed vessel containing an expanded fluidized bed, iron oxide-containing materials are reduced under weakly reducing conditions with solid carbonaceous reducing agents to or to...
5413622 Method of making hot metals with totally recycled gas  
A method is provided to improve the production of hot direct reduced iron in a melter-gasifier; reduction furnace system. All of the reduction gas produced in the melter gasifier and the top gas...
5401295 Smelting reduction method with high productivity  
The invention relates to a method for smelting reduction of metal ores involving a combination process wherein the metal ores are partly reduced in one or more stages and then completely reduced to...
5370727 Fluidized process for direct reduction  
A fluidized bed direct process is discharged for reducing raw iron ore fines and directly producing a steel product. The disclosed process includes a process for feeding raw iron ore fines into a...
5366897 Method for controlling the conversion of iron-containing reactor feed into iron carbide  
A process for controlling the conversion of reactor feed to iron carbide is disclosed. The reactor feed is subjected to a process gas in a fluidized bed reactor (10), and the off-gas from this...
5330556 Method for treating gas and particulate solids in a fluid bed  
A method for treating gases and solids in a fluid bed, the fluid bed reactor substantially comprising, regarded downstream, a mixing chamber, a riser pipe and a cyclone with a solids return pipe to...
5183495 Method for controlling a flow rate of gas for prereducing ore and apparatus therefor  
A method for controlling a flow rate of gas for prereducing ore comprises the steps of prereducing ore in a prereduction furnace having a fluidized bed with a gas generated in a smelting reduction...
5149487 Prereduction furnace of a smelting reduction facility of iron ore  
A prereduction furnace of a smelting reduction facility of iron ore includes of a fluidizing prereduction chamber at an upper part of the prereduction furnace wherein iron ores are fed and...
5137566 Process for preheating iron-containing reactor feed prior to being treated in a fluidized bed reactor  
A novel process for the conversion of reactor feed to iron carbide is provided. The process includes the step of preheating the reactor feed in an oxidizing atmosphere. The iron carbide produced by...
5129630 Prereduction furnace of a smelting reduction facility of iron ore  
A prereduction furnace of a smelting reduction facility comprises a fluidizing prereduction chamber in the upper part of the prereduction furnace wherein iron ores are fed and prereduced, a gas...
5073194 Process for controlling the product quality in the conversion of reactor feed into iron carbide  
A method of controlling product quality in a conversion of reactor feed to an iron carbide-containing product in a fluidized bed reactor. A Mossbauer analysis is performed on product samples...
5043011 Process for producing pig iron  
A process for producing pig-iron is described involving the use of a reduction shaft furnace 1 and a melt-down gasifier 2. The sponge iron produced from iron ore in the reduction shaft furnace is...
4995906 Method 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...
4946498 Process for the production of steel from fine ore hot briquetted after fluidized bed reduction  
Fine ore is reduced in a circulating fluidized bed by a reduction gas in the presence of fine coal, the discharged mixture of iron sponge particles and fine coal is subjected to hot compacting and...
4940488 Method of smelting reduction of ores containing metal oxides  
Metal oxide ore is subjected to smelting reduction to obtain the molten metal by a method which comprises prereducing said ore in solid state in a prereduction furnace, thereafter melting said ore...
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...
4874427 Methods for melting and refining a powdery ore containing metal oxides  
A powdery or fine granular ore containing metal oxides is melted and refined by charging the ore and a part of a reducing gas discharged from a vertical type of melting and reducing furnace into a...
4851040 Process for producing iron from fine-grained iron ores  
A process of producing iron from fine-grained iron ore by direct reduction, which includes adding oxygen, sponge iron and at least one of coal fines and low-temperature carbonized coal to an iron...
4851039 Process for the production of pig iron using cyclone  
A process for the production of pig iron from fine ore is described, in which initially the fine ore undergoes prereduction to a degree of metallization of preferably 65 to 75%. The sponge iron...
4834791 Method for producing raw iron from iron concentrates for the manufacture of gas, and plant apparatus for carrying out the method  
A method for producing raw iron from iron-bearing oxidic material, comprising finally reducing the iron oxide by charging the iron oxide, coal, oxygen gas and slag-forming flux to a molten iron...
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...
Matches 1 - 50 out of 68 1 2 >