| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 07/28/2004 | CN1159460C Process and equipment for preparing spongy iron by two-step reduction method |
| 07/27/2004 | US6767383 Method for producing pig iron |
| 07/22/2004 | WO2004061138A1 Method for reducing chromium containing raw material |
| 07/21/2004 | EP1439236A1 METHOD FOR DRYING MOLDING CONTAINING OXIDIZED METAL, METHOD FOR REDUCING OXIDIZED METAL AND ROTARY HEARTH TYPE METAL REDUCTION FURNACE |
| 07/21/2004 | EP1438543A1 Rotary hearth furnace and screw thereof for discharging reduced iron |
| 07/15/2004 | US20040134394 Rabble arm for a furnace |
| 07/15/2004 | DE10260737A1 Verfahren und Anlage zur Wärmebehandlung von titanhaltigen Feststoffen Method and apparatus for heat treatment of titanium-containing solids |
| 07/14/2004 | EP1437420A1 Method for producing titanium oxide containing slag |
| 07/13/2004 | CA2276172C Production method of metallic iron |
| 07/08/2004 | WO2004057044A2 Method and plant for the heat treatment of solids containing iron oxide |
| 07/08/2004 | WO2004057042A1 An apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcined additives and method using the same |
| 07/08/2004 | WO2004057040A1 Fluidized bed method and plant for the heat treatment of solids containing titanium |
| 07/08/2004 | WO2004057038A1 An apparatus for manufacturing moltens irons to improve operation of fluidized bed type reduction apparatus and manufacturing method using the same |
| 07/08/2004 | WO2004057037A1 An apparatus for manufacturing molten irons to dry and convey iron ores and additives and manufacturing method using the same |
| 07/08/2004 | DE10260731A1 Verfahren und Anlage zur Wärmebehandlung von eisenoxidhaltigen Feststoffen Method and apparatus for heat treatment of solids containing iron oxide |
| 07/08/2004 | CA2510926A1 Fluidized bed method and plant for the heat treatment of solids containing titanium |
| 07/07/2004 | EP1435395A1 Granular metallic iron |
| 07/07/2004 | EP1434888A1 Supplying solid feed materials for a direct smelting process |
| 07/06/2004 | CA2312488C Method for reforming reducing gas in a fluidized bed process for reduction of ore |
| 07/01/2004 | WO2004055832A1 Method and apparatus for controling temperature uniformity of the burden in a direct reduction shaft furnace |
| 07/01/2004 | WO2004055459A1 Seal mechanism for feeder |
| 07/01/2004 | US20040123785 Method of operating a multiple hearth furnace |
| 06/30/2004 | CN1509339A Apparatus and method for recycling iron laden dust and sludge in ingot iron manufacturing process using semi-soft coking coal and fine iron ore |
| 06/29/2004 | US6755888 Facility for reducing metal oxide, method for operating the facilities and moldings as raw material to be charged to reduction furnace |
| 06/29/2004 | CA2304618C Direct smelting process for producing metals from metal oxides |
| 06/24/2004 | US20040119210 Sealing mechanism of feeding device |
| 06/23/2004 | EP1431403A1 Direct smelting furnace and process therefor |
| 06/23/2004 | EP1430159A1 Method for reducing a particulate material containing a metal, especially iron ore |
| 06/23/2004 | EP1292713A4 Direct smelting process and apparatus |
| 06/23/2004 | EP1230403A4 A direct smelting process |
| 06/23/2004 | EP1137815A4 A process and an apparatus for producing metals and metal alloys |
| 06/23/2004 | CN1507498A Method and installation for utilziing waste products, which contain hydrocarbons and iron oxide particularly mill scale sludges and coal fines |
| 06/22/2004 | CA2295350C Method for manufacturing reduced iron agglomerates and apparatus therefor |
| 06/17/2004 | WO2004050939A2 Plasma-assisted melting |
| 06/17/2004 | WO2004050921A1 Process for producing molten iron |
| 06/16/2004 | EP1157136B1 Method for decreasing elutriation loss of fine iron ore in fluidized bed type reducing operation |
| 06/16/2004 | EP0976840B1 Method of operating rotary hearth furnace for reducing oxides |
| 06/16/2004 | CN1504582A Gas base reduction iron-smelting method and apparatus |
| 06/15/2004 | US6749664 Forming molten metal nuggets of high purity iron and residual carbon; limited loss or buildup; direct reduction; employing layer of conditioning materials to raise melting temperature |
| 06/10/2004 | WO2004048869A1 Material feeding apparatus for rotary hearth furnace |
| 06/10/2004 | US20040107796 Plasma-assisted melting |
| 06/09/2004 | EP1426451A1 METHOD FOR PRODUCING REDUCED IRON COMPACT IN ROTARY HEARTH REDUCING FURNACE, REDUCED IRON COMPACT, AND METHOD FOR PRODUCING PIG IRON USING THE SAME |
| 06/09/2004 | CN1503892A Method of operating multiple hearth furnace |
| 05/27/2004 | US20040099094 Metal apparatus for forming pig iron or steels from raw materials containing iron and carbon; fixed beds |
| 05/26/2004 | EP1422300A1 Production method of metal iron |
| 05/19/2004 | CN1498279A Byproduct sludge recycling apparatus in ironmaking system |
| 05/19/2004 | CN1498278A Modular furnace for reducing melting |
| 05/19/2004 | CN1498130A Process of conveying granular solids |
| 05/18/2004 | US6736876 Furnaces for preheating and reducing charged fine iron ore with gas; melting, gasification; scrubbing and cooling exhaust gas via tube; |
| 05/18/2004 | CA2238383C Process of hot briquetting granular sponge iron |
| 05/13/2004 | US20040091014 Dual use of an induction furnace to produce hot metal or pig iron while processing iron and volatile metal containing materials |
| 05/12/2004 | CN1495277A Cold-set carbon-contained pellet sponge-iron production uquipment |
| 05/11/2004 | CA2316829C Method for forming a moving hearth in a furnace for producing reduced iron agglomerates |
| 05/06/2004 | US20040083853 Heating, carbonizing the biomass in an oxygen-free furnace, reducing the metal oxide, agglomerating the mixture, melting; producing reduced iron from iron oxide by using biomass as reducing agent |
| 05/06/2004 | DE10315209A1 Fest-Elektrolyt mit hoher Ionen-Leitfähigkeit Solid electrolyte with high ionic conductivity |
| 05/06/2004 | DE10306024B3 Control of e.g. direct reduction process using neural network takes property measurements and employs neural network to predict property of manufactured product |
| 04/29/2004 | WO2004035847A1 Ferronickel and process for producing raw material for ferronickel smelting |
| 04/29/2004 | WO2004035845A1 Process and apparatus for extracting zinc |
| 04/29/2004 | WO2004007775A3 Direct melting and refining of metal oxide material |
| 04/29/2004 | US20040081892 Complex compound including water that has zirconic acid compound and polyvinyl alcohol and a carboxylic acid or salt, especially polyacrylic acid |
| 04/28/2004 | EP1294953B1 Device for directly reducing ore fine and installation for carrying out said method |
| 04/28/2004 | CN1492937A Method for producing melt iron in electric furnace |
| 04/28/2004 | CN1491982A Solid electrolyte with high ion conductivity and electrochemical system using said solid electrolyte |
| 04/22/2004 | WO2004007777A3 Metallurgical vessel and method of iron making by means of direct reduction |
| 04/22/2004 | US20040076539 Particles comprising mixtures of iron, carbon, silicon, sulfur and manganese, used as raw material for iron; purity; quality |
| 04/21/2004 | EP1411135A1 Method for accelerating separation of granular metallic iron from slag |
| 04/15/2004 | WO2004031324A1 Apparatus and process for the treatment of a material under pyrolytical conditions, and use thereof |
| 04/15/2004 | US20040071619 Method for the purification of zinc oxide controlling particle size |
| 04/15/2004 | CA2501262A1 Apparatus and process for the treatment of a material under pyrolytical conditions, and use thereof |
| 04/14/2004 | EP1408124A1 Method for producing feed material for molten metal production and method for producing molten metal |
| 04/14/2004 | EP0787213B1 Process for producing liquid raw iron or semi-finished steel products and installation for implementing it |
| 04/09/2004 | CA2444158A1 Method for producing feed material for molten metal production and method for producing molten metal |
| 04/08/2004 | WO2004033730A1 Method for producing titanium oxide containing slag |
| 04/08/2004 | US20040066830 Electrode and method for arranging the electrode in electric arc furnaces |
| 04/07/2004 | EP1405925A1 Method of manufacturing metal iron |
| 04/07/2004 | EP1405924A1 Method for producing granular metal |
| 04/07/2004 | EP1405895A1 Apparatus and process for the treatment of a material under pyrolytical conditions, and use thereof |
| 04/07/2004 | EP1405017A1 Rabble arm for a furnace |
| 04/07/2004 | EP1404881A1 A gas injection lance |
| 04/06/2004 | CA2287646C Method for integrating a blast furnace and a direct reduction reactor using cryogenic rectification |
| 04/01/2004 | US20040060392 Method for introducing a granular ore into a roasting kiln |
| 04/01/2004 | US20040060389 Reduction of metallic fines to form pre-reduced fines; hot transfer of the fines within an inert gas curtain into the heel, which is covered with a nonfoaming slag; agitation of the heel by injection of gas; smelting |
| 03/31/2004 | EP1228252B1 Method and device for enclosing an electric arc |
| 03/25/2004 | WO2004024961A1 Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead |
| 03/23/2004 | CA2205812C Scrap melting process |
| 03/17/2004 | EP1397521A2 Method and device for treating particulate material |
| 03/11/2004 | US20040049176 Cryoplasty device and method |
| 03/10/2004 | CN1480539A Method for preparing ferrous powder by using coke oven gas to deoxidize powder of iron ore |
| 03/10/2004 | CN1141402C Apparatus and process for producing sponge iron by using coal gas-making shaft furnace to reduce iron ore |
| 03/03/2004 | CN1479852A Method for introducing granular ore into roasting kiln |
| 02/26/2004 | DE10237759A1 Elektrode sowie Verfahren zu deren Anordnung in Elektro-Lichtbogenöfen Electrode and methods of assembly in electric arc furnaces |
| 02/25/2004 | EP1391522A2 Electrode and its disposition in an electric arc furnace |
| 02/25/2004 | CN1139663C Method and apparatus for extracting metals from ores |
| 02/24/2004 | US6696029 Method for the purification of zinc oxide controlling particle size |
| 02/19/2004 | US20040031355 Direct smelting process and apparatus |
| 02/17/2004 | US6692688 Modular furnace |
| 02/17/2004 | CA2296351C Method for controlling a smelting reduction process |
| 02/12/2004 | US20040026834 Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities |
| 02/11/2004 | EP1114194B1 A direct smelting process and apparatus |
| 02/11/2004 | CN1474877A Method for operating rotary heartn type reducing furnace and rotary hearth type reducing furnace facilities |