| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 02/10/2004 | US6689182 Method and device for producing molten iron |
| 02/05/2004 | US20040022621 Method and device for distributing a lumpy bulk material |
| 02/05/2004 | US20040020326 High strength; preventing crumbling |
| 02/04/2004 | EP1386013A2 Method and installation for utilizing waste products, which contain hydrocarbons and iron oxide, particularly mill scale sludges and coal fines |
| 02/04/2004 | EP1244818B1 Method and installation for reducing ore fines in a multi-stage suspension gas stream using a cyclone separator |
| 02/04/2004 | EP1114195B1 A direct smelting process |
| 02/04/2004 | EP1114191B1 A direct smelting process |
| 02/04/2004 | CN1473204A Metal oxide-containing green pellet for reducing furnace, method for production thereof, method for reduction thereof, and reduction facilities |
| 02/03/2004 | US6685761 Method for producing beneficiated titanium oxides |
| 02/03/2004 | US6685466 Metal apparatus comprising kilns for heating and reduction of heat treated mixtures of metal oxides, coal or coke |
| 01/28/2004 | EP1383933A1 Method for producing a melt iron in an electric furnace |
| 01/22/2004 | WO2004007777A2 Metallurgical vessel and method of iron making by means of direct reduction |
| 01/22/2004 | WO2004007775A2 Direct melting and refining of metal oxide material |
| 01/21/2004 | EP1381818A1 Method of operating a multiple hearth furnace |
| 01/14/2004 | EP1380656A1 Direct melting furnace and process therefor |
| 01/08/2004 | WO2002055744A3 Method for producing a mixture of iron ore and semi-coke |
| 01/07/2004 | EP1377688A1 Method and apparatus for practicing carbonaceous-based metallurgy |
| 01/07/2004 | EP1105542B1 Shaft furnace |
| 01/02/2004 | EP1373580A2 Modular shaft furnace for reduction smelting |
| 01/02/2004 | EP1372838A1 Process of conveying granular solids |
| 12/31/2003 | CN1464911A A gas injection lance |
| 12/30/2003 | US6669754 In which iron-containing charge materials are exposed to a reduction gas in a reduction shaft to produce a reduced material for use in producing liquid pig iron or liquid primary steel |
| 12/30/2003 | US6669470 Method for operating manufacturing equipment including heating furnace |
| 12/24/2003 | WO2003068994A8 Method and device for producing pig iron and/or pig iron intermediate products |
| 12/23/2003 | US6666629 Process for conveying granular solids |
| 12/17/2003 | CN1462355A Method and device for distributing lumpy bulk material |
| 12/17/2003 | CN1462313A Granular refined iron |
| 12/17/2003 | CN1462312A Recyclin method of waste material by using of coal based iron making process |
| 12/17/2003 | CN1462311A Method and device for producing moving bed |
| 12/11/2003 | WO2003102249A1 Furnace sidewall structure of rotary hearth furnace |
| 12/11/2003 | WO2002103063A3 Method and device for treating particulate material |
| 12/09/2003 | US6660221 Rotary hearth furnace and screw thereof for discharging reduced iron |
| 12/09/2003 | US6660052 Method for blowing synthetic resins as a fuel into a furnace |
| 11/26/2003 | EP1365036A1 Method of preparing carbonaceous iron oxide pellets with hydrocarbon-type binder |
| 11/26/2003 | CN1458981A Direct smelting process and apparatus |
| 11/26/2003 | CN1458289A Method for realizing zero exhaust for fully steelmaking of steel dust and mud |
| 11/26/2003 | CN1128978C Rotary hearth furnace |
| 11/25/2003 | US6652802 Direct iron and steelmaking |
| 11/25/2003 | US6652620 Cooling hot reduced iron briquettes at low cost without degrading the strength; primary cooling with steam, secondary cooling with steam and sprayed water, and final cooling with sprayed water at given temperature range |
| 11/20/2003 | WO2003002775A3 Method and plant for treating flue gas dust of electric steelmaking furnaces and steel mills using pelletization |
| 11/19/2003 | CN2586702Y Apparatus for making iron by gas reduction |
| 11/19/2003 | CN1457367A Method for producing sponge iron, and reduced iron powder and method for production thereof |
| 11/19/2003 | CN1128231C Method for producing directly reduced iron in layered furnace |
| 11/18/2003 | US6648942 Using a hot pre-reduced iron ore, charging to the moving hearth furnace, heating to melt, then reacted with the carbon and separating slag, forming carburized iron nuggets, cooling; metal working |
| 11/18/2003 | US6648878 Cryoplasty device and method |
| 11/18/2003 | CA2261501C Process and apparatus for producing metal from metal ores |
| 11/11/2003 | US6645269 By reducing under pressure a metal-oxide-containing material in a fluidized-bed reactor and subsequently melting down the reduced material in a melt-down gasifier which generates a reducing gas from coal; sponge iron |
| 11/06/2003 | WO2002079529A8 Method for direct metal making by microwave energy |
| 11/05/2003 | EP1285096B1 Method and device for producing pig iron or liquid steel pre-products from charge materials containing iron ore |
| 10/30/2003 | US20030201585 Rotary hearth furnace and screw thereof for discharging reduced iron |
| 10/29/2003 | EP1357195A2 Method for reducing wet waste from metal refining processes |
| 10/28/2003 | CA2303111C Multichamber division type fluidized bed furnace |
| 10/23/2003 | US20030198779 Method of producing iron oxide pellets |
| 10/21/2003 | CA2078146C Process for producing metals and metal alloys in a smelt reduction vessel |
| 10/15/2003 | CN1449451A Method and installation for the indirect reduction of particulate oxide-containing ores |
| 10/09/2003 | US20030188603 Comprises mixing blast-furnace sludge with iron-oxide containing powder, agglomerating, feeding into continuous hearth, then heating to remove zinc |
| 10/08/2003 | EP1350856A2 Method for making reduced iron using blast-furnace sludge |
| 10/07/2003 | US6630099 Facilitates continuous melting while retaining the options of discharging product by continuously, also facilitates high heat transfer rate throughout the reaction zones and avoids localized overheating or undercooling |
| 10/07/2003 | US6630010 Method of producing metallic iron |
| 10/07/2003 | US6629839 Charging carbon material onto flat moving hearth of furnace to form layer preventing molten metal from directly contacting hearth, charging raw material layer onto carbon layer, forming metal and slag receiving recesses on surface of carbon layer |
| 10/02/2003 | WO2003080874A1 Process and apparatus for the direct reduction of iron oxides in an electrothermal fluidized bed and resulant product |
| 10/02/2003 | US20030185700 0.25-0.35% by mass C, not more than 0.15% Si, 0.2-0.8% Mn, 0.3-0.6% Ni, 1.6-1.9% Cr, 0.26-0.35% V, 0.6-1.1% Mo, 0.6-1.4% W, 1.3-1.4% Mo+W/2, and the balance Fe |
| 10/01/2003 | EP1246947B1 Method for producing pig iron |
| 09/30/2003 | US6627171 Method for producing iron carbide from granulated sponge iron |
| 09/30/2003 | US6626977 Direct smelting process and apparatus |
| 09/24/2003 | CN1443856A Coal base hot-air rotary hearth furnace melting reduction iron-smelting method |
| 09/18/2003 | WO2003064708A8 Finisher-hearth-melter furnace and method of using for iron-making / steel-making |
| 09/17/2003 | EP0958385B1 Method of agglomerating oil-containing steel mill waste |
| 09/17/2003 | CN1443246A Direct smelting process and apparatus |
| 09/10/2003 | EP1342043A2 Method for introducing a granular ore into a roasting kiln |
| 09/10/2003 | EP1165844B1 A device for preventing back mixture in a fluidized bed reactor |
| 09/10/2003 | CN1441065A Direct smelting container |
| 09/04/2003 | US20030164066 Forming bath of molten metal and molten slag in metallurgical vessel; injecting ferrous feed and smelting ferrous feed to metal; injecting solid carbonaceous material; generating a gas flow; injecting preheated air such that it impinges |
| 09/03/2003 | EP1340822A1 Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities |
| 08/28/2003 | US20030159541 Method and installation for the indirect reduction of particulate oxide-containing ores |
| 08/27/2003 | EP1338660A1 Metal oxide-containing green pellet for reducing furnace, method for production thereof, method for reduction thereof, and reduction facilities |
| 08/27/2003 | CN1438348A High-activity reduction agent for smelting iron alloy by electric oven |
| 08/27/2003 | CN1438331A Process of coal-gas one-step production of direct-reduction iron and production apparatus |
| 08/21/2003 | WO2003068995A1 Method and device for the continuous production of steel using metal charge material |
| 08/21/2003 | WO2003068994A1 Method and device for producing pig iron and/or pig iron intermediate products |
| 08/21/2003 | CA2472721A1 Process and apparatus for producing metals and/or primary metal products |
| 08/13/2003 | EP1109940B1 2-stage fluidized bed type fine iron ore reducing apparatus, and reducing method using the apparatus |
| 08/13/2003 | EP0958386B1 Process for reducing ore fines by fluidisation and use thereof for the production of molten pig iron or steel |
| 08/12/2003 | US6605130 Given particle size of iron oxide in the ore and maximum fluidity of the carbonaceous material such as coal; efficient reduction reaction |
| 08/07/2003 | WO2003064708A1 Finisher-hearth-melter furnace and method of using for iron-making / steel-making |
| 08/06/2003 | CN1434782A Rotary hearth furnace with charge slot air shield |
| 08/05/2003 | US6602321 Direct smelting process |
| 08/05/2003 | US6602320 Heating to reduce iron oxide |
| 08/05/2003 | US6602317 Controlling the temperature uniformity of the center portion of the iron burden in a direct reduction shaft furnace thereby allowing a higher amount of hydrocarbons to be used throughout the reduction process; direct reduced iron |
| 07/31/2003 | WO2003062474A1 Process for producing molten iron |
| 07/29/2003 | US6599374 Method for producing a mixture of iron carbide and granular, directly reduced iron |
| 07/29/2003 | CA2290131C Pellets incorporated with carbonaceous material and method of producing reduced iron |
| 07/23/2003 | EP1187942B1 Method for producing melt iron |
| 07/23/2003 | EP1053443B1 Method for forming a moving hearth in a furnace for producing reduced iron agglomerates |
| 07/22/2003 | US6596223 Apparatus for direct smelting |
| 07/16/2003 | CN1430678A Method and device for producing pig iron or liquid steel intermediate from charge materials containing iron ore |
| 07/15/2003 | US6592806 Reduced iron discharger in rotary hearth reducing furnace |
| 07/15/2003 | US6592649 Purity; materials handling; reduction of iron oxide ores with hydrocarbons |
| 07/15/2003 | US6592648 Providing bed of agglomerates containing ore and carbonaceous reductant on hearth of furnace, heating radiant heat source to reduce iron oxides in ore or waste oxides to metallic iron |
| 07/15/2003 | US6592647 Heating and reducing an iron oxide source by carbonaceous reducing agents characterized in that a liquid fraction in a solid and liquid coexisting phase of produced slag containing multicomponent gangue is controlled to produce pure iron |