Class / Patent application number | Description | Number of patent applications / Date published |
075507000 |
Melting Iron(Fe) or treating molten Iron
| 59 |
075458000 |
Blast furnace reduction to produce molten Iron(Fe)
| 19 |
075484000 |
Moving furnace or hearth (e.g., moving belt, etc.)
| 17 |
075488000 |
Reduction to metallic Iron(Fe) within shaft furnace
| 12 |
075443000 |
Reducing in gaseous suspension
| 9 |
075505000 |
Reduction with externally applied gas (e.g., batch HyL process, etc.)
| 8 |
075500000 |
Reduction in molten state
| 8 |
075503000 |
Reduction in presence of solid Carbon(C) containing material (e.g., coke, coal, carbides, etc.)
| 6 |
075436000 |
With consolidation (e.g., pelletizing, etc.) of solid metallic Iron(Fe) product after reduction | 5 |
20080295647 | Apparatus for Manufacturing Molten Irons By Injecting Fine Coals Into a Melter-Gasifier and the Method Using the Same - The present invention relates to an apparatus for manufacturing molten irons by injecting fine carbonaceous materials into a melter-gasifier and a method for manufacturing molten irons using the same. The method for manufacturing molten irons according to the present invention includes steps of reducing mixtures containing iron ores in a reduction reactor and converting the mixtures containing iron ores into reduced materials, preparing lumped carbonaceous materials containing volatile matters as a heating source for melting the reduced materials, charging the lumped carbonaceous materials into a dome-shaped upper portion of a melter-gasifier and forming a coal packed bed, preparing fine carbonaceous materials containing volatile matters as a heating source for melting the reduced materials, injecting oxygen and the fine carbonaceous materials into the coal packed bed through a tuyere installed in the melter-gasifier, charging the reduced materials into the melter-gasifier connected to the reduction reactor and manufacturing molten irons, and supplying reducing gas in the melter-gasifier made from volatile matters contained both in the lumped carbonaceous materials and the fine carbonaceous materials to the reduction reactor. | 12-04-2008 |
20080302211 | LINEAR HEARTH FURNACE SYSTEM AND METHODS REGARDING SAME - Systems and methods for use in processing raw material (e.g., iron bearing material) include a linear furnace apparatus extending along a longitudinal axis between a charging end and a discharging end (e.g., the linear furnace apparatus includes at least a furnace zone positioned along the longitudinal axis). Raw material is provided into one or more separate or separable containers (e.g., trays) at the charging end of the linear furnace apparatus. The separate or separable containers are moved through at least the furnace zone and to the discharging end where the processed material is discharged resulting in one or more empty containers. One or more of the empty containers are returned to the charging end of the linear furnace apparatus to receive further raw material. | 12-11-2008 |
20100107818 | SYSTEM AND METHOD FOR PRODUCING METALLIC IRON NODULES - A method for producing metallic iron nodules by assembling a shielding entry system to introduce coarse carbonaceous material greater than 6 mesh in to the furnace atmosphere at location(s) where the temperature of the furnace atmosphere adjacent at least partially reduced reducible iron bearing material is between about 2200 and 2650° F. (1200 and 1450° C., the shielding entry system adapted to inhibit emission of infrared radiation from the furnace atmosphere and seal the furnace atmosphere from exterior atmosphere while introducing coarse carbonaceous material greater than 6 mesh into the furnace to be distributed over the at least partially reduced reducible iron bearing material, and heating the covered at least partially reduced reducible iron bearing material in a fusion atmosphere to assist in fusion and inhibit reoxidation of the reduced material during fusion to assist in fusion and inhibit reoxidation of the reduced material in forming metallic iron nodules. | 05-06-2010 |
20100218646 | PRODUCING METHOD OF DIRECT REDUCED IRON - A producing method of direct reduced iron includes the steps of: drying an oxidized iron raw material selected from a group including iron ore and iron-making dust generated in an iron-making process to have a predetermined moisture content; mixing the oxidized iron raw material subjected to the drying step and a reducing material having a predetermined moisture content to obtain a mixture; pulverizing the mixture obtained in the mixing step for 80% minus-sieve to have a particle diameter of 70 μm to 500 μm; kneading the mixture after the moisture content of the mixture subjected to the pulverizing step is adjusted; agglomerating the mixture subjected to the kneading step to be agglomerate; and reducing the agglomerate obtained in the agglomerating step by a rotary hearth furnace to generate direct reduced iron. | 09-02-2010 |
20160024611 | METHOD FOR RECYCLING IRON-CONTAINING BY-PRODUCTS DISCHARGED FROM COAL-BASED MOLTEN IRONMAKING PROCESS, SYSTEM THEREFOR, AND REDUCED IRON AGGLOMERATION SYSTEM - There is provided a method and system for recycling by-products containing large amounts of useful components and discharged in the form of dust and sludge from a coal-based molten iron making process to reuse the by-products in a reduced iron agglomeration process. The system includes: a fluidized reduction furnace reducing fine iron ore; a reduced iron tank connected to the fluidized reduction furnace through a reduced iron discharge pipe for storing the reduced iron and supplying the reduced iron in an agglomeration system; an agglomeration system agglomerating the reduced iron transferred from the reduced iron tank; and a transfer unit transferring compactions of by-products discharged from a molten iron making process through a by-product supply pipe. The compactions of the by-products are supplied to at least one selected from the group consisting of the fluidized reduction furnace, the reduced iron supply pipe, and the reduced iron tank. | 01-28-2016 |
075474000 |
Reduction in rotary kiln | 2 |
20150013498 | METHOD OF PRODUCTION AND APPARATUS FOR PRODUCTION OF REDUCED IRON - The present invention relates to a method and apparatus for producing reduced iron from ironmaking dust which contains iron oxide which is generated at an ironmaking plant, takes note of the rotary kiln reduction method which does not require pretreatment of the dust, and has as its problem the pursuit of facilities which achieve further improvement of heat efficiency and stable operation. | 01-15-2015 |
20100263487 | PROCESS AND PLANT FOR PRODUCING CHAR AND FUEL GAS - A method for producing char and fuel gas includes degasifying a carbonaceous material with oxygen-containing gases in a fluidized bed reactor at a temperature of more than about 1000° C. and at a pressure of from about 1 bar to about 40 bar. A supply of oxygen within the fluidized bed reactor is adjusted so as to recover more than 60% of fixed carbon in the carbonaceous material in a char product, and an oxygen availability in a lower or bottom region of the fluidized bed reactor is less than 80% of an oxygen availability in an upper region of the fluidized bed reactor. | 10-21-2010 |
075437000 |
Reducing Iron(Fe) halide | 1 |
20160102375 | METHOD AND PLANT FOR PRODUCING IRON FROM ROASTED PYRITES - The invention relates to a method and a recovery system for obtaining/recovering metallic iron and/or iron compounds, in particular iron chloride, from ores and/or ore tailings, especially from pyrite tailings, preferably from roasted pyrites produced during sulphuric acid manufacture. | 04-14-2016 |
075434000 |
With concurrent production of hydraulic cement | 1 |
20160107930 | METHOD FOR PROCESSING STEEL SLAG AND HYDRAULIC MINERAL BINDER - The invention relates to a method for processing steel slag to produce a hydraulic mineral binder with a high hardening potential and to recover iron. There is provision for this purpose to provide a feed product comprising steel slag with MnO. This feed product is further processed as a melt by introducing reducing agents into the melt. A lime saturation factor of between 90 and 110 is hereby to be achieved in the mineral melt portion. Subsequently the melt is cooled in a defined manner and elemental iron is mechanically separated from the solidified melt. The solidified melt is then supplied for use as hydraulic mineral binder. | 04-21-2016 |
Entries |
Document | Title | Date |
20090013827 | Conditioned Quicklime for Injection to a Molten Bath of a Steel-Making Vessel - In a method of producing steel using a steel-making vessel, where lime is used as a flux material that is blown, from above, into a steel-making bath along with an oxygen stream, providing a flux material composition of calcium oxide having a particle size of less than 250 mesh, which contains a flow aid material that is a polymeric siloxane, in an amount of less than 0.5 percent by weight of the calcium oxide, and injecting the flux material composition through a lance along with oxygen into the steel-making bath contained in the steel-making vessel. | 01-15-2009 |
20100154594 | Method of Melting A Mixture of Scrap Metal Using Scrap Rubber - A process for melting scrap metal for producing steel which includes the steps of combining a quantity of scrap metal and scrap rubber in an electric arc furnace. Energy is then applied to the quantity of steel and scrap rubber in the furnace to start the combustion of the scrap rubber to add additional heat for melting the scrap metal containing steel. | 06-24-2010 |
20100162852 | METHOD AND APPARATUS FOR THE DIRECT REDUCTION OF IRON ORES UTILIZING SYNGAS - A direct reduction plant for the production of a metallized product (DRI) by the reduction of iron ores in lump or pellet form, wherein the reducing gas utilized in the DRI reactor contains acid gases such as sulphur compounds and carbon dioxide. The make-up reducing gases are typically produced by partial oxidation of hydrocarbons (syngas) at a high pressure while the DRI reactor is usually operated at a lower pressure. The pressure level of the reducing gas effluent from the DRI reactor (top gas), after cooling and dewatering, is increased to the pressure level of the syngas and the resulting recycle reducing gas is then combined with the make-up syngas and treated in a single acid-gas absorption unit forming a combined stream of clean upgraded reducing gas which thereafter is expanded in a turbine for lowering combined reducing gas pressure to the pressure level of the DRI reactor and is then heated to a temperature preferably above 950° C. and used in the DRI reactor for producing said DRI. The compressor for raising the pressure of the initially cool recycle gas uses energy from the expansion turbine (used for lowering the pressure of the high-pressure combined reducing gas). | 07-01-2010 |
20110023661 | BIO-CO-CR-MO ALLOY WITH ION ELUTION SUPPRESSED BY STRUCTURE CONTROL, AND PROCESS FOR PRODUCING SAME - This invention provides a technique for rendering bio-toxicity such as allergy toxicity derived from Ni trace impurity, i.e., nickel toxicity, which is unavoidably present in a bio-Co—Cr—Mo alloy or an Ni-free stainless steel alloy unharmful, characterized in that an element selected from the group consisting of the group 4, 5 and 13 elements of the periodic table, particularly an element selected from the group consisting of the group 4 elements of the periodic table, is added to the alloy composition. The additive element is preferably an element selected from the group consisting of zirconium and titanium, more preferably zirconium. | 02-03-2011 |
20110079109 | Method Of Operating A Converter And Apparatus For Carrying Out The Method - The present invention relates to a method of operating a converter, in particular a Peirce-Smith converter or a converter with similar design or mode of operation, and to an apparatus, for instance a plant, for carrying out the method. The method comprises the step of:
| 04-07-2011 |
20110120266 | METHOD AND SYSTEM FOR ENERGY-OPTIMIZED AND CO2 EMISSION-OPTIMIZED IRON PRODUCTION - A process for energy-and emission-optimized iron production and an installation for carrying out the process. A first partial amount of a generator gas produced in a melter gasifier is used as a first reducing gas in a first reduction zone. A second partial amount is fed to at least one further reduction zone as a second reducing gas. In addition, after CO | 05-26-2011 |
20110154950 | Burner and Method for Processing Oxidizable Materials - Burner assembly for use in industrial heating and melting applications of material susceptible to oxidation at elevated temperatures is comprised of a flow passage of oxidant surrounded by an annular flow passage of fuel whereby the oxidant is substantially contained inside the fuel layer up to at least 5 oxidant nozzle diameters downstream of the burner outlet in order to minimize contact between the oxidant and the furnace load. | 06-30-2011 |
20110179910 | PROCESS FOR PRODUCING AGGLOMERATES OF FINELY PARTICULATE IRON CARRIERS - A process for producing agglomerates from fine-grained iron carriers and at least one binder as a charge material for a metallurgical process is shown. In at least one further agglomeration step, the agglomerates are coated with a layer, comprising iron carriers and at least one binder, and heated in such a way that the binder is cured in the region of the surface of the agglomerates. In a process for producing liquid pig iron or liquid primary steel products from charge materials and possibly additions and agglomerates, the agglomerates are preheated in a reducing zone, which has a preheating stage, in such a way that the agglomerates completely harden in the preheating stage. | 07-28-2011 |
20110197712 | METHOD OF COAL GASIFICATION AND DIRECT IRONMAKING AND SYSTEM THEREFOR - A system of coal gasification and direct ironmaking which is effective in attaining both heat recovery in a coal-based direct ironmaking process and a reduction in equipment investment in a coal gasification process. | 08-18-2011 |
20120031235 | METAL RECOVERY SYSTEM - A thermal system for separating out co-mingled metals in almost pure form, the system including a tunnel kiln having temperature zones through which the co-mingled metals are conveyed and progressively heated until at least one metal of the co-mingled metals melts thereby separating the melted metal from the other metal or metals of the co-mingled metals. The system includes molten metal catch basins for collecting the melted metal which are arranged beneath a conveyor on which the co-mingled metals are transported within the kiln. The catch basins are tapped to the outside of the kiln so that as the various metals melt out at progressively higher temperatures, they can be collected into cast iron chills or other collection devices to form pure ingots. | 02-09-2012 |
20120118107 | PROCESS AND APPARATUS FOR PRODUCING SPONGE IRON - A process and an apparatus for producing sponge iron from iron-oxide-containing material in lump form by direct reduction in a reduction shaft using a reducing gas, wherein the entire reducing gas is introduced by means of a number of reducing gas distribution ducts in a star-like arrangement or arranged parallel to one another, preferably into the lower quarter of the reduction shaft, and evenly distributed over the entire cross-section of the reduction shaft. | 05-17-2012 |
20120279356 | Process and Device for Charging Into a Smelting Unit - A process and a device for charging a primary product for pig iron into a smelting unit are provided. According to the process and device, some of the primary product that has been formed by reducing oxidic iron carriers is stored in the hot state in a reservoir tank before being supplied into the storage device or charging device that is directly connected to the smelting unit. | 11-08-2012 |
20140150606 | Method of Manufacturing Direct Reduction Iron and Reduction Firing Apparatus - A method of manufacturing direct reduction iron and a reduction firing apparatus. The apparatus has a reduction furnace including a left chamber, a right chamber, a material containing device, a step mechanism, a slag distributing device, a charging device, heating burners, a fume extraction path, a charging device, a material receiving tank and a slag discharging path. The method includes the following steps: distributing and charging the slag in the material containing device; carrying and sending the material containing device through a preheating station, a heating station and a reduction station sequentially. Meanwhile, heating the material to be reduced by a combustion of fuel with the heating burners; discharging the reduced material into the material receiving tank; placing the material device from which the material is discharged into the feeding side of the other chamber, then a next work circulation begins. | 06-05-2014 |
20140345425 | Starting a Smelting Process - A method of starting a smelting process in a smelting vessel includes heating frozen slag and forming molten slag and draining molten slag from a forehearth connection via a forehearth and establishing a clear flow path through the forehearth connection and thereafter hot starting the smelting process. | 11-27-2014 |