| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 05/22/1998 | CA2242392A1 Process for producing liquid pig iron or semifinished steel products from iron-containing materials |
| 05/20/1998 | EP0842301A1 Method for making pozzolans, synthetic blast-furnace slag, belite or alite clinkers, and pig-iron alloys, from oxidic slag, and a device for implementig this method |
| 05/19/1998 | US5752993 Blast furnace fuel from reclaimed carbonaceous materials and related methods |
| 05/14/1998 | WO1998020172A1 Process for producing sponge iron |
| 05/14/1998 | WO1998020171A1 Process for producing sponge iron by direct reduction of iron oxide-containing materials |
| 05/14/1998 | DE19750773A1 Vorrichtung zum Austragen bzw. Durchmischen von stückigem Gut Device for dispensing or mixing of lumpy |
| 05/14/1998 | CA2242249A1 Process for producing sponge iron |
| 05/13/1998 | EP0840807A1 Direct iron and steelmaking |
| 05/13/1998 | EP0840806A1 Process for producing liquid pig iron or intermediate steel products and installation for implementing it |
| 05/13/1998 | EP0740695A4 Utilizing discarded carbon |
| 05/07/1998 | WO1998018969A1 Process for returning finely dispersed solids discharged with a carrier gas from a reactor vessel |
| 05/06/1998 | CN1181112A Method of producing metals and metal alloys |
| 05/06/1998 | CN1038259C Method for preventing sponge iron from binding in production |
| 05/05/1998 | US5746805 Process for the continuous manufacture of steel |
| 05/05/1998 | US5746804 Oxygen and air in tubes, feeding particles, flanges and nozzles |
| 05/05/1998 | CA2100270C Reduction of metal oxides |
| 04/30/1998 | WO1998017830A1 Method for producing steel from iron sponges in an induction furnace |
| 04/22/1998 | EP0837034A1 Process and equipment for producing iron carbide |
| 04/22/1998 | EP0805878A4 Method for co-producing fuel and iron |
| 04/21/1998 | US5741349 For smelting; layer of slag and protective frozen layer |
| 04/16/1998 | WO1998015663A1 Device for dosed introduction of fine particle material into a reactor vessel |
| 04/16/1998 | WO1998015662A1 A method and an apparatus for producing metals and metal alloys |
| 04/16/1998 | WO1998015661A1 Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method |
| 04/16/1998 | WO1998015660A1 Method for blowing fine particles containing metal oxide into a reducing gas |
| 04/16/1998 | CA2267793A1 Method for blowing fine particles containing metal oxide into a reducing gas |
| 04/16/1998 | CA2267776A1 A method and an apparatus for producing metals and metal alloys |
| 04/15/1998 | EP0617739B1 Method for continuously melting down scrap metal |
| 04/14/1998 | US5738704 Mixture comprising silicon-containing iron-carbon alloy and metal oxide; earlier and uniform carbon oxidation, high decarbonizing at low bath temperature |
| 04/14/1998 | US5738694 A compressed briquet for waste recycling comprising polymeric binder, carbon for reduction, kaolin filler and calcium carbonate hardener |
| 04/08/1998 | CN1178560A Method for operating shaft furance |
| 04/08/1998 | CN1178559A Melt reduction equipment and operating method |
| 04/08/1998 | CN1178316A Rotary hearth furnace |
| 04/08/1998 | CN1178247A Smelting process for production of iron and steel |
| 04/01/1998 | EP0831984A1 Process for recovering iron from iron-rich material |
| 04/01/1998 | EP0783590B1 Process for reducing oxide-containing material and system for carrying out this process |
| 03/31/1998 | US5733358 Process and apparatus for the manufacture of steel from iron carbide |
| 03/31/1998 | US5733357 Process for converting iron oxide to iron carbide employing internally generated carbon oxide as the carbiding agent |
| 03/26/1998 | WO1998012358A1 Producing liquid iron having a low sulfur content |
| 03/26/1998 | DE19632403C1 Verfahren und Vorrichtung zur Erzeugung von siliziumreichen Gießereiroheisen Method and apparatus for the production of silicon-rich foundry pig iron |
| 03/25/1998 | CN1177009A Method for injecting synthetic resin into furnace and apparatus therefor |
| 03/24/1998 | US5730775 Reacting iron oxide with carbonaceous material; radiation hetaing; devolatilization; metallization; cooling |
| 03/18/1998 | EP0829544A1 Method for blowing synthetic resin into furnace and apparatus therefor |
| 03/18/1998 | CN1176666A Device of three-stage fluidized bed furnace type for reducing fine iron ore |
| 03/18/1998 | CN1176665A Method for injecting fine iron ore in smelting reducing process |
| 03/18/1998 | CN1176310A Method and apparatus for producing pig iron by smelting reduction and method of obtaining such plant |
| 03/17/1998 | US5728193 Process for recovering metals from iron oxide bearing masses |
| 03/12/1998 | WO1998010034A1 Apparatus for carbonizing material |
| 03/11/1998 | EP0828127A1 Rotary hearth furnace |
| 03/11/1998 | EP0827554A1 Stable operation of a smelter reactor |
| 03/11/1998 | EP0665899B1 Process and device for melting scrap |
| 03/10/1998 | US5725631 Composite charge for metallurgical processing |
| 03/06/1998 | CA2213668A1 Rotary hearth furnace |
| 02/25/1998 | CN1174240A Process for direct reduction of iron oxide-containing materials with solid carbonaceous reducing agents |
| 02/25/1998 | CN1037529C Process for utilising iron-containing wastes or residues |
| 02/25/1998 | CN1037528C Converter process for production of iron |
| 02/12/1998 | WO1998005800A1 Method and device for producing silicon-rich foundry iron |
| 02/11/1998 | EP0823487A1 Melt reduction equipment and operating method |
| 02/11/1998 | EP0474704B1 Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 02/05/1998 | WO1998004878A1 Method of melting oxidic slags and combustion residues, and device for carrying out this method |
| 02/05/1998 | WO1998004751A1 A process for the direct production of cast iron from iron bearing ore, and an apparatus suitable to carry out said process |
| 02/05/1998 | WO1998004749A1 Metal reduction and melting process |
| 02/05/1998 | CA2232610A1 Method of arrangement for melting oxidic slags and combustion residues |
| 02/04/1998 | CN2273712Y Shaft furnace for riducing iron |
| 02/03/1998 | US5714113 Apparatus for electric steelmaking |
| 02/03/1998 | US5713983 Degasification; comminution |
| 02/03/1998 | US5713982 Iron powder and method of producing such |
| 01/28/1998 | CN1171807A Method for coking coal |
| 01/28/1998 | CN1037193C Method for producing direct reduced iron |
| 01/28/1998 | CN1037192C Method and equipment for transport of sponge iron |
| 01/27/1998 | CA2096579C Method of producing molten pig iron or molten steel pre-products and a plant therefor |
| 01/22/1998 | WO1998002587A1 Process for charging of metal carrying materials in a melt gasifier |
| 01/22/1998 | WO1998002586A1 Method of producing liquid pig iron or liquid steel precursors |
| 01/22/1998 | CA2259681A1 Method of producing liquid pig iron or liquid steel precursors |
| 01/21/1998 | EP0819182A1 A method of producing metals and metal alloys |
| 01/15/1998 | WO1998001587A1 Process for producing a reduction gas for reduction of metal ore |
| 01/15/1998 | WO1998001586A1 Process for producing a reduction gas for reduction of metal ore |
| 01/15/1998 | WO1998001585A1 Process for producing liquid metal and facilities for carrying out the process |
| 01/14/1998 | EP0818543A1 Method for operating shaft furnace |
| 01/14/1998 | EP0817868A1 Method for injecting fine iron ore in smelting reducing process |
| 01/14/1998 | CN1170440A Process and apparatus for manufacture of steel from iron carbide |
| 01/07/1998 | EP0815265A1 Process for reducing ore fines and arrangement for carrying out the process |
| 01/02/1998 | DE19624428A1 Pozzolana, synthetic slag, clinker and pig iron production |
| 12/31/1997 | WO1997049835A1 Process and apparatus for production of useful iron product from industrial waste streams |
| 12/31/1997 | WO1997049637A1 Beneficiation of furnace dust for the recovery of chemical and metal values |
| 12/31/1997 | CN1169163A Method for co-producing fuel and iron |
| 12/31/1997 | CN1168925A Method and equipment for jet reduction for making pig iron |
| 12/31/1997 | CA2259423A1 Beneficiation of furnace dust for the recovery of chemical and metal values |
| 12/31/1997 | CA2259325A1 Process and apparatus for production of useful iron product from industrial waste streams |
| 12/30/1997 | US5702246 Shaft furnace for direct reduction of oxides |
| 12/24/1997 | WO1997048825A1 Melting gasifier for producing molten metals |
| 12/24/1997 | WO1997048824A1 Method of producing hot metal |
| 12/24/1997 | CA2258748A1 Melting gasifier for producing molten metals |
| 12/24/1997 | CA2234562A1 Method of producing hot metal |
| 12/23/1997 | CA2052126C Molten metal producing and refining method |
| 12/18/1997 | WO1997047774A1 Method of charging metalliferous material into a smelting-gasification zone |
| 12/18/1997 | WO1997047773A1 Device for producing sponge iron |
| 12/18/1997 | DE19625127A1 Vorrichtung zur Erzeugung von Eisenschwamm Device for producing sponge iron |
| 12/18/1997 | CA2258004A1 Method of charging metalliferous material into a smelting-gasification zone |
| 12/18/1997 | CA2255076A1 Device for producing sponge iron |
| 12/17/1997 | EP0812364A1 Device of three-stage fluidized bed furnace type for reducing fine iron ore |