| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 10/20/1998 | US5824134 Direct reduction of iron ore utilizing organic hazardous materials |
| 10/15/1998 | WO1998045657A1 Fluid bed reactor |
| 10/14/1998 | CN1040231C Method and apparatus for directly deoxidation of powder mineral or fine mineral sand |
| 10/07/1998 | EP0843740A4 Reducing iron oxides in rotary hearth furnace |
| 10/01/1998 | WO1998042878A1 Process for direct production of cast iron from fine iron ore and fine coal and apparatus suitable to carry out said process |
| 09/30/1998 | EP0819182A4 A method of producing metals and metal alloys |
| 09/23/1998 | EP0865506A1 Process for producing liquid metal and facilities for carrying out the process |
| 09/23/1998 | EP0865505A1 Process for hot briqueting granular sponge iron |
| 09/22/1998 | US5811057 Refractory lining system for high wear area of high temperature reaction vessel |
| 09/22/1998 | US5810906 Method for preheating feed materials for the production of iron carbide |
| 09/22/1998 | US5810905 Process for making pig iron |
| 09/17/1998 | WO1998040521A1 Method and device for processing reducing gas for reducing ores |
| 09/17/1998 | CA2283773A1 Method and device for processing reducing gas for reducing ores |
| 09/16/1998 | EP0864658A1 Refining iron ore |
| 09/16/1998 | CN1039830C Method for producing reducible iron-contaiing material having less clustering during direct reduction and products thereof |
| 09/16/1998 | CN1039829C Process for direct reduction of iron-oxide containing materials with solid carbonaceous reducing agents |
| 09/16/1998 | CN1039828C Method for disposal/recycling of gas cylinders containing filling material |
| 09/15/1998 | US5807420 Process for reduction of iron with solid fuel objects as amended by exam |
| 09/11/1998 | WO1998038934A1 Cryoplasty device and method |
| 09/09/1998 | EP0862657A1 Duplex procedure for the production of metals and metal alloys from oxidic metal ores |
| 09/09/1998 | EP0831984A4 Process for recovering iron from iron-rich material |
| 09/08/1998 | US5804156 Large scale production in a fluid bed reactor; controlling temperature, pressure so that hydrogen concentration is above equilibrium concentration. |
| 09/03/1998 | WO1998038342A1 Production method of iron carbide |
| 09/03/1998 | WO1998038130A1 Operation management method of iron carbide production process |
| 09/03/1998 | WO1998038129A1 Production method of iron carbide |
| 09/03/1998 | WO1998038128A1 Production method of iron carbide |
| 09/03/1998 | DE19706348C1 Vorrichtung zur Direktreduktion von Feinerzen Apparatus for direct reduction of fine ores |
| 09/03/1998 | CA2276576A1 Production method of iron carbide |
| 09/03/1998 | CA2276574A1 Production method of iron carbide |
| 09/03/1998 | CA2269913A1 Operation management method of iron carbide production process |
| 09/03/1998 | CA2263681A1 Production method of iron carbide |
| 09/02/1998 | EP0861909A1 Use of a briquette of foundry waste agglomerated with a hydraulic binder as a charge material for smelting furnaces of an iron foundry |
| 09/02/1998 | EP0861335A1 Process for the destruction of rubber-based materials and automobile fragmentation residues |
| 09/02/1998 | EP0795036A4 Method for producing iron feedstock |
| 09/01/1998 | US5800592 Process for producing molten pig iron with melting cyclone |
| 08/26/1998 | EP0804621B1 Direct reduction process for iron oxide-containing materials |
| 08/19/1998 | EP0858516A1 Agglomeration of iron oxide waste materials |
| 08/19/1998 | EP0858365A1 Method of returning a finely-divided solid extracted from a reactor vessel using a gas |
| 08/19/1998 | CN2288182Y Side-bottom-blown blast furnace for smelting iron and steel |
| 08/19/1998 | CN1190995A Processfor producing liquid pig iron or intermediate steel products and installation for implementing it |
| 08/18/1998 | US5795539 Method for cooling graphite electrodes used for metal melting and refining in an electric arc furnace and a ladle |
| 08/13/1998 | WO1998035064A1 Method of producing liquid crude iron or liquid steel fabricated materials |
| 08/13/1998 | WO1998035063A1 Method and device for direct reduction of ore fines |
| 08/13/1998 | CA2251553A1 Method of producing liquid crude iron or liquid steel fabricated materials |
| 08/13/1998 | CA2250414A1 Method and device for direct reduction of ore fines |
| 08/12/1998 | EP0807187B1 Method and device for cooling hot briquetted spongy iron |
| 08/12/1998 | EP0787215B1 Process for producing liquid ray iron or steel basic products and iron sponge and plant for implementing it |
| 08/11/1998 | CA2006253C Pre-reduced iron oxide |
| 08/06/1998 | WO1998033943A2 Device for the controlled cooling of hot-briquetted directly reduced iron sponge |
| 08/05/1998 | EP0787214B1 Plant and process for producing raw iron and/or sponge iron |
| 08/04/1998 | US5788921 Apparatus for electric steelmaking |
| 07/30/1998 | WO1998032883A1 Refractory wall, metallurgical vessel comprising such a refractory wall and method in which such a refractory wall is applied |
| 07/30/1998 | DE19803431A1 Vorrichtung zum kontrollierten Abkühlen von heißbrikettiertem direktreduziertem Eisenschwamm Apparatus for controlled cooling of hot-briquetted directly reduced iron sponge |
| 07/28/1998 | US5785733 Apparatus including drying/preheating furnace and reducing furnace, each having smoothly tapered shape and connected to cyclone which captures iron ore dust for recycling and discharges cleaned exhaust gas |
| 07/22/1998 | EP0645584B1 Method of operating a plasma furnace |
| 07/21/1998 | US5782957 Process for treating iron bearing material |
| 07/16/1998 | WO1998030497A1 Iron carbide manufacturing process and apparatus |
| 07/15/1998 | EP0852692A1 Method of melting oxidic slags and combustion residues, and device for carrying out this method |
| 07/14/1998 | CA2124538C Process for producing liquid pig iron from lump iron ore |
| 07/09/1998 | WO1998029574A1 Fluidized bed type reducing system for reducing fine iron ore |
| 07/09/1998 | WO1998029573A1 Production method of metallic iron |
| 07/09/1998 | WO1998029572A1 Electric furnace with insulated electrodes and process for producing molten metals |
| 07/09/1998 | CA2276151A1 Electric furnace with insulated electrodes and process for producing molten metals |
| 07/09/1998 | CA2247080A1 Fluidized bed type reducing system for reducing fine iron ore |
| 07/08/1998 | CN1186863A Bead iron producing process in rotary hearth furnace and its separating method |
| 07/02/1998 | WO1998028449A1 3-stage fluidized bed type fine iron ore reducing apparatus having x-shaped circulating tubes |
| 07/02/1998 | WO1998028448A1 Smelting-reduction apparatus, and method for producing molten pig iron using the smelting reduction apparatus |
| 07/02/1998 | WO1998028447A1 Apparatus for keeping optimal penetration depth formed at front end of oxygen tuyere and method for keeping the same |
| 07/02/1998 | WO1998028385A1 Method for increasing the charring ratio of coal |
| 07/02/1998 | CA2247152A1 3-stage fluidized bed type fine iron ore reducing apparatus having x-shaped circulating tubes |
| 07/02/1998 | CA2247021A1 Apparatus for keeping optimal penetration depth formed at front end of oxygen tuyere and method for keeping the same |
| 07/01/1998 | CN1186522A Process for recovering metals from iron oxide bearing masses |
| 07/01/1998 | CN1186521A Production of foundry iron |
| 06/30/1998 | US5772727 Process for the production of metal from metal ores |
| 06/30/1998 | CA2116275C Process for the production of synthetic rutile |
| 06/25/1998 | WO1998027239A1 Direct reduction of metal oxide agglomerates |
| 06/25/1998 | WO1998027233A1 Method for making liquid metal |
| 06/25/1998 | WO1998027232A1 Producing iron from solid iron carbide |
| 06/25/1998 | DE19653326A1 Direct ore reduction with reduced gas reheater metal dusting problem |
| 06/25/1998 | CA2275336A1 Method for making liquid metal |
| 06/17/1998 | EP0848068A2 Plant and process for producing raw iron and/or sponge iron |
| 06/17/1998 | EP0714451B1 Method for the disposal/recycling of gas cylinders containing filling material |
| 06/16/1998 | US5766544 Rotating, heating retort containing particulate material, injecting additional material to effect reaction, controlling temperature, rate of injection |
| 06/10/1998 | DE19704566C1 Direct reduction of fine ores with wide distribution of particle sizes |
| 06/10/1998 | CN1184455A Process and equipment for producing iron carbide |
| 06/10/1998 | CN1038694C Process for producing an iron melt |
| 06/09/1998 | US5762681 Multicompartment of furnaces and cyclones |
| 06/03/1998 | EP0845541A2 Plant and process for producing raw iron and/or sponge iron |
| 06/02/1998 | US5759503 Method for the further purification of zinc oxide |
| 06/02/1998 | US5759483 Apparatus for treating a particulate material within a rotating retort |
| 05/28/1998 | WO1998022626A1 Reduced iron manufacturing method and apparatus |
| 05/27/1998 | EP0843740A1 Reducing iron oxides in rotary hearth furnace |
| 05/27/1998 | EP0670910B1 Process and device for producing pig iron from iron ore or for thermally and/or chemically treating an easily decomposable material |
| 05/22/1998 | WO1998021538A1 Device for discharging barlike or striplike material from a rotary furnace |
| 05/22/1998 | WO1998021537A1 Device for discharging or mixing lump materials |
| 05/22/1998 | WO1998021372A1 Method and apparatus for manufacturing reduced iron |
| 05/22/1998 | WO1998021371A1 Process for producing liquid pig iron or semifinished steel products from iron-containing materials |
| 05/22/1998 | WO1998021370A1 Process for producing liquid pig iron or semifinished steel products from ore |
| 05/22/1998 | WO1998021295A1 Blast furnace fuel from reclaimed carbonaceous materials |
| 05/22/1998 | CA2271435A1 Device for discharging or mixing lump materials |