| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 12/17/1997 | EP0812347A1 Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace |
| 12/11/1997 | WO1997046844A1 Process for applying sinter material on an already scaled sinter ground coat |
| 12/11/1997 | WO1997046722A1 Recovery of iron products from waste material streams |
| 12/11/1997 | WO1997046719A1 Process and device for coating a fusion gasifier with gasifying means and spongy iron |
| 12/11/1997 | WO1997046717A1 Method for making pozzolans, synthetic blast-furnace slag, belite or alite clinkers, and pig-iron alloys, from oxidic slag, and a device for implementing this method |
| 12/11/1997 | CA2257910A1 Recovery of iron products from waste material streams |
| 12/11/1997 | CA2255710A1 Process and device for charging a fusion gasifier with gasifying means and spongy iron |
| 12/10/1997 | EP0811080A1 2-stage fluidized bed furnace for pre-reducing fine iron ore and method for pre-reducing fine iron ore using the furnace |
| 12/10/1997 | CN1167506A Sponge iron production process and plant |
| 12/10/1997 | CN1167156A Process for producing molten pig iron or molten steel preproducts |
| 12/04/1997 | WO1997045564A1 Fluidized bed treatment of eaf dust |
| 12/04/1997 | WO1997045561A1 Method of agglomerating oil-containing steel mill waste |
| 12/04/1997 | CA2256726A1 Fluidized bed treatment of eaf dust |
| 12/04/1997 | CA2255956A1 Method of agglomerating oil-containing steel mill waste |
| 12/03/1997 | EP0809713A1 Process for producing liquid raw iron or liquid steel base products and sponge iron and plant for implementing it |
| 12/03/1997 | EP0596095B1 Process and device for heating and melting lumps of sponge iron |
| 12/03/1997 | CN1166861A Method of producing molten crude iron or molten crude steel, and plant for carrying out the method |
| 11/27/1997 | WO1997044496A1 Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment |
| 11/27/1997 | WO1997044495A1 Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment |
| 11/27/1997 | CA2257492A1 Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment |
| 11/26/1997 | CN1166184A Scrap melting method |
| 11/25/1997 | US5690717 Iron carbide process |
| 11/20/1997 | DE19720420A1 Metal production from metal oxide particles |
| 11/19/1997 | EP0807187A1 Method and device for cooling hot briquetted spongy iron |
| 11/12/1997 | EP0805878A1 Method for co-producing fuel and iron |
| 11/11/1997 | US5685524 Preheating |
| 11/06/1997 | DE19707047A1 Shaft furnace for direct reduction of oxide |
| 11/05/1997 | EP0804621A1 Direct reduction process for iron oxide-containing materials |
| 11/04/1997 | US5683489 Improved efficiency, adsorption of sulfur on surface, suppression of precipitation of free carbon |
| 11/04/1997 | US5683488 Method for producing an iron feedstock from industrial furnace waste streams |
| 10/30/1997 | WO1997040197A1 Metal containing compound reduction and melting process |
| 10/30/1997 | DE19708034A1 Production of liquid pig iron or liquid steel pre-products |
| 10/29/1997 | EP0802884A1 Recovery of chemical values from industrial wastes |
| 10/28/1997 | US5681367 Preparing green pellets for reducing to sponge iron pellets, each comprising iron ore, carbon reductant, slag forming materials, reducing in heated reducing zone, feeding to smelting zone having lower temperature to reduce further |
| 10/21/1997 | US5680413 Electric arc melting furnace |
| 10/16/1997 | WO1997038141A1 Smelting reduction apparatus and method of operating the same |
| 10/14/1997 | US5676734 Hot drying gas flows around ore particles of fine ore, releasing entrained dust ore particles, collecting and mixing the dust ore particles with dried fine ore, drying is effected in a fluidized bed |
| 10/14/1997 | US5676732 Method for producing direct reduced iron utilizing a reducing gas with a high content of carbon monoxide |
| 10/14/1997 | CA2019050C Method and apparatus for steel making |
| 10/08/1997 | EP0799322A1 Method of directly reducing a particulate iron oxide-containing material and plant for carrying out the method |
| 10/08/1997 | CN1161718A Arrangement in a wall and method of coating wall |
| 10/08/1997 | CN1036075C Fusion reducing iron smelting method and its equipment |
| 10/07/1997 | US5674308 Reaction of strong reducing gas mixture through series of beds allows intimate contact to facilitate direct reduction of iron oxide fines to metallized iron |
| 10/02/1997 | DE19623246C1 Loading of melting gasifier with gasifying agents and sponge iron@ |
| 10/01/1997 | CN1161063A Process for producing liquid raw iron or liquid steel base products and sponge iron and plant for implementing it |
| 10/01/1997 | CN1161062A Process for producing raw iron or and iron sponge and its equipment |
| 10/01/1997 | CN1161061A Process for producing liquid raw iron or steel basic products and iron sponge and plant for implementing it |
| 09/25/1997 | WO1997035038A1 Stable operation of a smelter reactor |
| 09/24/1997 | EP0796350A1 Method of producing molten crude iron or molten crude steel, and plant for carrying out the method |
| 09/24/1997 | EP0796349A1 Sponge iron production process and plant |
| 09/24/1997 | EP0796348A1 Method of directly reducing a particulate iron-containing material, and plant for carrying out the method |
| 09/24/1997 | CN1035955C Method for production of sponge iron by using gas-making shaft furnace method of coal-base melting bed |
| 09/23/1997 | US5669955 Reduction |
| 09/18/1997 | WO1997034018A1 Method and apparatus for making metallic iron |
| 09/18/1997 | CA2694865A1 Method for making metallic iron |
| 09/17/1997 | EP0795036A1 Method for producing iron feedstock |
| 09/16/1997 | US5667555 Method for the removal of calcium by products during the production of an iron feedstock |
| 09/12/1997 | WO1997033135A1 Device for continuously depositing alternate stacked layers of at least two fine materials on a moving carrier |
| 09/12/1997 | WO1997033006A1 Process for the production of liquid pig iron or liquid intermediate products of steel and plant for carrying out said process |
| 09/12/1997 | WO1997033005A1 Process for the production of spongy metal |
| 09/12/1997 | WO1997033004A1 Process for the production of liquid pig iron or liquid intermediate products of liquid steel and spongy metal |
| 09/12/1997 | WO1997033003A1 Plant and process for the production of spongy metal |
| 09/12/1997 | CA2248231A1 Plant and process for the production of spongy metal |
| 09/12/1997 | CA2248229A1 Process for the production of liquid pig iron or liquid intermediate products of liquid steel and spongy metal |
| 09/12/1997 | CA2248227A1 Process for the production of spongy metal |
| 09/12/1997 | CA2248225A1 Process for the production of liquid pig iron or liquid intermediate products of steel and plant for carrying out said process |
| 09/10/1997 | EP0793731A1 Process and apparatus for the manufacture of steel from iron carbide |
| 09/10/1997 | CN1158903A Industrial production method of cold-cured pellet used directly for iron and steel smelting |
| 09/10/1997 | CN1158901A Process of carburizing sponge iron |
| 09/10/1997 | CN1035831C Direct reduction process and apparatus for oxygen-rich fusion gasifying furnace |
| 09/03/1997 | EP0792939A1 Method of melting tinned iron scrap |
| 09/03/1997 | EP0792938A1 Scrap melting method |
| 09/03/1997 | CN1158358A Method for prodn. of sponge iron filtering material used for deoxidizing device |
| 09/02/1997 | US5662860 Apparatus for producing molten pig iron by direct reduction |
| 08/27/1997 | EP0791039A1 Method for coking coal |
| 08/27/1997 | CN1158146A Process for producing liquid pig iron or semi-finished steel products and installation for implementing it |
| 08/27/1997 | CN1158145A Process for producing liquid pig iron or semi-finished sheet products and installation for implementing it |
| 08/26/1997 | CA2061147C Method of starting a plant for the production of pig iron or steel pre-material as well as arrangement for carrying out the method |
| 08/20/1997 | EP0790319A2 Process for the reduction of iron ores with reducing agents containing solid carbon |
| 08/20/1997 | EP0680519B1 High-production rotary furnace steelmaking |
| 08/13/1997 | CN1157010A Process for producing hydraulic binders and/or alloys, E.G. ferrochromium or ferrovanadium |
| 08/07/1997 | WO1997028284A1 Steel-making method and plant |
| 08/07/1997 | WO1997028283A1 Process for converting iron oxide to iron carbide |
| 08/07/1997 | DE19621412A1 Verfahren zum Umwandeln von Eisenoxid in Eisencarbid unter Einsatz eines intern erzeugten Kohlenoxids als Mittel zum Carbidisieren A process for converting iron oxide to iron carbide using a carbon oxide generated internally as a means for Carbidisieren |
| 08/06/1997 | EP0787215A1 Process for producing liquid ray iron or steel basic products and iron sponge and plant for implementing it |
| 08/06/1997 | EP0787214A1 Plant and process for producing raw iron and/or sponge iron |
| 08/06/1997 | EP0787213A1 Process for producing liquid raw iron or semi-finished steel products and installation for implementing it |
| 07/31/1997 | WO1997027338A1 Direct iron and steelmaking |
| 07/31/1997 | WO1997027337A1 Method for operating shaft furnace |
| 07/31/1997 | WO1997027336A1 Melt reduction equipment and operating method |
| 07/31/1997 | CA2214984A1 Direct iron and steelmaking |
| 07/24/1997 | WO1997026375A1 Direct ironmaking or steelmaking apparatus using self-reducing iron oxide pellets |
| 07/24/1997 | CA2243124A1 Direct ironmaking or steelmaking apparatus using self-reducing iron oxide pellets |
| 07/23/1997 | EP0641395B1 Synthetic rutile production |
| 07/16/1997 | EP0783593A1 Method for recovering metal and chemical values |
| 07/16/1997 | EP0783591A1 Process for producing liquid pig iron or semi-finished steel products and installation for implementing it |
| 07/16/1997 | EP0783590A1 Process for reducing oxide-containing material and system for carrying out this process |
| 07/15/1997 | US5647888 Process for producing metals and metal alloys in a smelt reduction vessel |
| 07/15/1997 | US5647887 Fluidizable bed co-processing fines in a direct reduction system |
| 07/15/1997 | CA2107544C Method of providing fuel for an iron making process |