| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 12/21/2004 | US6832564 Method of operating a multiple hearth furnace |
| 12/15/2004 | EP1434888A4 Supplying solid feed materials for a direct smelting process |
| 12/15/2004 | CN1555419A Method for producing reduced iron compact in rotary hearth reducing furnace, reduced iron compact, and method for producing pig iron using the same |
| 12/14/2004 | US6831939 Dual use of an induction furnace to produce hot metal or pig iron while processing iron and volatile metal containing materials |
| 12/09/2004 | US20040245681 Thermal treatment of the precursor material of a catalytically active material |
| 12/08/2004 | CN2661698Y Furnace burden and device for direct reduction of coal group |
| 12/08/2004 | CN1553964A Method and apparatus for practicing carbonaceous-based metallurgy |
| 12/02/2004 | WO2004090173A8 Direct smelting plant |
| 12/02/2004 | US20040237718 Process for reducing metal-containing, in particular iron-ore-containing, particulate material |
| 12/02/2004 | US20040237335 Method for drying molding containing oxidized metal, method for reducing oxidized metal and rotary hearty type metal reduction furnace |
| 12/01/2004 | EP1481101A1 Method and device for the continuous production of steel using metal charge material |
| 12/01/2004 | CN1550558A Process and apparatus for automatically controlling slag foaming |
| 12/01/2004 | CN1178554C Process and apparatus for automatically controlling slag foaming |
| 11/25/2004 | WO2004101829A2 Method and apparatus for improved use of primary energy sources in integrated steel plants |
| 11/25/2004 | WO2004101828A1 Method for utilizing slag |
| 11/25/2004 | US20040231514 Method and device for treating particulate material |
| 11/25/2004 | CA2525926A1 Process for the utilization of slag |
| 11/24/2004 | EP1269796A4 Process and apparatus for automatically controlling slag foaming |
| 11/24/2004 | EP1027569B1 Method for operating moving hearth reducing furnace |
| 11/24/2004 | CN1548558A Air permeability raising method for well type kiln to make iron or calcine cement |
| 11/24/2004 | CN1176771C Rotary kiln process of producing reducing ilmenite powder for welding electrode |
| 11/24/2004 | CN1176770C Process for preparing Fe alloy powder by reducing Fe scales generated by rolling steel and Fe concentrate |
| 11/23/2004 | CA2283070C Integrated direct reduction iron system |
| 11/18/2004 | WO2004074521A3 Hot material conveyor |
| 11/18/2004 | US20040227279 Metallurgical reactor for the production of cast iron |
| 11/18/2004 | US20040226406 utilizing the chemical values of the gases produced by blast furnaces, blast oxygen converters and coke ovens within a steel plant with advantages in energy efficiency and decreased environmental impact as measured by the amount of CO2 released |
| 11/17/2004 | EP1477573A1 Metallurgical reactor for the production of cast iron |
| 11/17/2004 | EP1276912A4 A direct smelting process and apparatus |
| 11/17/2004 | EP1228251B1 Method and device for melting down finely particulate material containing metal, such as sponge iron |
| 11/11/2004 | WO2004097055A2 Fluidized bed for treating iron oxide |
| 11/11/2004 | US20040221426 Mixing iron oxide with water, pelletization |
| 11/10/2004 | EP1474536A2 Method and device for producing pig iron and/or pig iron intermediate products |
| 11/10/2004 | CN1175237C Method and apparatus for reducing a feed material in a rotary hearth furnace |
| 11/09/2004 | US6814924 Rotary hearth furnace and screw thereof for discharging reduced iron |
| 11/09/2004 | CA2302214C Oxygen-fuel boost reformer process and apparatus |
| 11/04/2004 | US20040216560 Method and device for producing pig iron or liquid steel pre-products from charge materials containing iron ore |
| 11/04/2004 | US20040216280 Method for making metal oxide agglomerates |
| 11/02/2004 | US6812260 Raw material introduced from first supply port is fed into catalyst layer to permit reaction of the raw material to take place, and that as activity of catalyst is gradually lowered, the quantity of raw material to be fed to is reduced |
| 11/02/2004 | US6811759 Method of producing iron oxide pellets |
| 11/02/2004 | US6811743 Method and apparatus for supplying granular raw material for reduced iron |
| 10/28/2004 | WO2004092421A1 Method and apparatus for producing reduced metal |
| 10/28/2004 | US20040214125 Transfer of hot feed materials from a preprocessing plant to an electric smelting or melting furnace |
| 10/28/2004 | US20040211295 Production method of metallic iron |
| 10/28/2004 | US20040211293 vapor-phase reduction of metal halides to form steel in sponge or powder form; hot isotatic pressing, forging, pressing and sintering, or containered extrusion; to produce a gas turbine component |
| 10/27/2004 | EP1471155A2 Method for fabricating a martensitic steel without any melting |
| 10/27/2004 | EP0979313B1 Method for thermal treatment of granulated iron ore before reduction |
| 10/27/2004 | CN1173147C Method for producing reduced iron agglomerates |
| 10/26/2004 | CA2294272C Method for using coal fines in a melt-down gasifier |
| 10/21/2004 | WO2004090175A1 Method for producing improved coal for use in metallurgy, and method for producing reduced metal and slag containing oxidized nonferrous metal |
| 10/21/2004 | WO2004090174A1 Direct smelting plant and process |
| 10/21/2004 | WO2004090173A1 Direct smelting plant |
| 10/21/2004 | US20040208773 Method for preparing a metallic article having an other additive constituent, without any melting |
| 10/20/2004 | EP1469086A1 Process for producing molten iron |
| 10/14/2004 | US20040202979 Method for discharging reduced product from a movable-hearth furnace and a discharging device |
| 10/14/2004 | US20040201140 Facility for reducing metal oxide, method of operating the same, and shaped article of raw material for reducing furnace |
| 10/14/2004 | DE10319625B3 Heat treating solids, preferably iron oxide-containing solids, in a fluidized bed reactor comprises passing fluidizing gas through distribution plates to fluidize the solids |
| 10/12/2004 | US6802887 Feeding gas which contains a condensable and/or evaporable component in the gaseous and/or liquid state entrained therein in which possible damage to the gas supply means is considerably reduced or prevented altogether. |
| 10/06/2004 | CN1533981A Oxygen supply device |
| 10/06/2004 | CN1170107C Method for operating moving hearth reducing furnace |
| 10/06/2004 | CN1169971C High-temp gas method and equipment for producing spony iron |
| 09/30/2004 | WO2004083463A1 Process for producing particulate iron metal |
| 09/30/2004 | CA2519049A1 Manufacturing method for granulated metallic iron |
| 09/29/2004 | EP0976841B1 Method of operating movable hearth furnace |
| 09/29/2004 | CN1533443A Method for accelerating separation of granular metallic iron from slag |
| 09/28/2004 | US6797034 Method of producing reduced metals and apparatus for reducing metal oxides |
| 09/23/2004 | WO2004081240A1 Method for recycling converter dust to rotary hearth reducing furnace |
| 09/23/2004 | WO2004081238A1 Process for producing reduced matal and agglomerate with carbonaceous material incorporated therein |
| 09/22/2004 | EP1458895A1 Method and device for treating a fine-particled feedstock especially containing metal |
| 09/22/2004 | CN1167930C Equipment for jetting granular material into container |
| 09/15/2004 | EP1025267B2 Method for smelting fine grained direct reduced iron in an electric arc furnace |
| 09/15/2004 | CN1529804A Rabbel arm for furnace |
| 09/15/2004 | CN1166447C Multichamber division type fluidized bed furnace |
| 09/14/2004 | US6790255 Moving-hearth heating furnace and method for making reduced metal agglomerates |
| 09/09/2004 | US20040173054 Method of manufacturing metal iron |
| 09/08/2004 | CN1527886A Production method of metal iron |
| 09/02/2004 | WO2004074521A2 Hot material conveyor |
| 09/02/2004 | US20040168550 Method for accelerating separation of granular metallic iron from slag |
| 09/02/2004 | US20040168549 Process for producing molten iron |
| 08/31/2004 | US6783744 For recovery of high purity zinc oxide products and optionally iron carbon feedstocks from industrial waste streams containing zinc oxide and/or iron; waste streams treated by adding carbon and ammonium chloride displacing undesired metal |
| 08/26/2004 | WO2004072309A2 Multivariate, predictive regulation of a direct reduction process |
| 08/26/2004 | US20040163493 thermally reducing a metal oxide including a carbonaceous reductant disposed on a hearth moving in a reducing furnace; oxygen-enriched air is used as combustion air to decrease the fuel consumption; while NOx content in exhaust gas is not increased |
| 08/26/2004 | DE19744151C5 Verfahren zum Schmelzen von feinkörnigem, direkt reduziertem Eisen in einem Elektrolichtbogenofen A method of melting fine-grained, direct reduced iron in an electric arc furnace |
| 08/19/2004 | WO2004070301A1 Seal structure of solid feeding screw, and method of manufacturing reduced metal using the seal structure |
| 08/19/2004 | DE29825067U1 Schachtofen mit Injektordüse Shaft furnace with injector |
| 08/17/2004 | CA2302244C Method of making iron and steel |
| 08/12/2004 | WO2004067784A1 Process for producing sponge iron and reduced iron powder, sponge iron, and charging apparatus |
| 08/12/2004 | US20040155388 Method and installation for utilizing waste products, which contain hydrocarbons and iron oxide, particularly mill scale sludges and coal fines |
| 08/12/2004 | US20040154436 Method for producing granular metal |
| 08/11/2004 | EP1445336A1 Method for producing metallic iron |
| 08/11/2004 | EP1445335A1 Reduced iron mass cooling method and cooling device |
| 08/11/2004 | EP1404881A4 A gas injection lance |
| 08/10/2004 | US6773659 Gas injection lance |
| 08/10/2004 | US6773521 Apparatus and process for treating a particulate material within a rotating retort |
| 08/10/2004 | CA2256135C Method of producing reduced iron pellets |
| 08/05/2004 | WO2004065641A1 An improved smelting process for the production of iron |
| 08/04/2004 | CN1518635A Work recovery from process involving steam generation |
| 08/03/2004 | CA2299263C Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags |
| 07/29/2004 | WO2004063398A1 Method for producing metallic iron |
| 07/28/2004 | CN1516744A Method for producing granular metal |
| 07/28/2004 | CN1516743A Method of mfg. metal iron |