| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 05/09/1995 | US5413622 Melting-gasification-reduction furnace system |
| 05/03/1995 | CN1102215A Method for producing direct reduced iron |
| 05/02/1995 | US5411570 Steelmaking process |
| 04/25/1995 | US5409584 Electrical method for conversion of molecular weights of particulates |
| 04/19/1995 | CN1101675A Continuous reduction of metals and/or metal oxides |
| 04/18/1995 | US5407461 Feeding gases to smelt below bath surface, wetting entire lining surface with smelt |
| 04/18/1995 | US5407460 Method for improving quality of reforming gas used in the direct reduction of metal oxides |
| 04/18/1995 | US5407179 Fluidized bed direct steelmaking plant |
| 04/05/1995 | CN1101077A Process for utilising iron-containing wastes or residues |
| 04/04/1995 | US5403379 Reduction of titaniferous ores and apparatus |
| 04/04/1995 | US5402990 Steel making plant |
| 04/04/1995 | CA1335041C Process of dezincifying a material flow when operating a pig-iron production plant |
| 03/31/1995 | WO1995009336A1 Electric arc fusion furnace |
| 03/29/1995 | EP0645584A1 Plasma fusion furnace and method of its operation |
| 03/28/1995 | US5401295 Smelting reduction method with high productivity |
| 03/22/1995 | CN1100470A Steelmaking process |
| 03/15/1995 | EP0643141A1 Method for producing reducible iron-containing material having less clustering during direct reduction and products thereof |
| 03/14/1995 | US5397376 Pollution control |
| 03/09/1995 | DE4410093C1 Process for the direct reduction of materials containing iron oxides |
| 03/08/1995 | EP0641395A1 Synthetic rutile production. |
| 03/07/1995 | US5395463 Method and arrangement for reduction annealing of iron powder |
| 03/02/1995 | WO1995006139A1 Method for the disposal/recycling of gas cylinders containing filling material |
| 03/01/1995 | CN1099418A Method and device of reduction iron-smelting for cold-coagulated carboniferous briquet |
| 02/23/1995 | WO1995005486A1 Composite charge for smelting steel |
| 02/23/1995 | DE4328164A1 Process for producing pig iron in a coke-fired shaft furnace |
| 02/20/1995 | CA2126116A1 Blended charge for steel production |
| 02/09/1995 | DE4326562A1 Process and apparatus for the direct reduction of fine ores or fine ore concentrates |
| 02/08/1995 | CN1098438A External heating sponge iron direct reduction furnace |
| 02/07/1995 | US5387274 Reforming, reduction, carburizing iron oxide |
| 02/07/1995 | US5386974 Apparatus for treating gases and particulate solids in a fluid bed |
| 01/18/1995 | CN2187613Y Spongy iron producing equipment |
| 01/12/1995 | DE4421673A1 Process for the preparation of pig iron or liquid steel precursors from starting materials containing iron ore |
| 01/10/1995 | US5380352 Method of using rubber tires in an iron making process |
| 01/04/1995 | CN1027289C Improvements in or relating to pre-reduced iron oxide |
| 01/03/1995 | US5378260 Iron, oxidation, reduction |
| 12/28/1994 | EP0630976A2 Process for producing molten pig iron from iron oxide pellets |
| 12/28/1994 | EP0630975A1 Process for the direct reducing of material containing iron oxide |
| 12/27/1994 | US5376161 Steel making process including transporting spong iron briquettes |
| 12/27/1994 | CA2036972C Prereduction furnace of a smelting reduction facility of iron ore |
| 12/27/1994 | CA2036916C Prereduction furnace of a smelting reduction facility of iron ore |
| 12/27/1994 | CA1333663C Method of decarburizing high cr molten metal |
| 12/27/1994 | CA1333662C Process for melting cold iron material |
| 12/21/1994 | EP0629710A1 Process and installation for reduction of ores or prereduced metal-bearing products in molten state |
| 12/21/1994 | EP0629708A1 Method and apparatus for the pneumatic transport of large iron-bearing particles |
| 12/20/1994 | US5374299 In-flight oxidation in first reaction zone; sulfidation or reduction of reaction products in second zone |
| 12/20/1994 | US5374297 Lance for fuel and oxygen injection into smelting or refining furnace |
| 12/16/1994 | CA2125821A1 Process and apparatus for smelting reduction of ores or pre-reduced metal carriers |
| 12/14/1994 | EP0549656B1 Process and device for the reduction annealing of powdered iron |
| 12/13/1994 | US5372628 Contacting with a dispersion of a particulate material |
| 12/06/1994 | US5370727 Reducing the raw iron ore in fluidizing beds with reducing gas hydrogen, carbon monooxide generated by steam and natural gas to desulfurization and metallization, compacting the metal fines |
| 12/06/1994 | CA1333336C Mill arrangement and a process of operating the same |
| 12/06/1994 | CA1333335C Mill arrangement and a process of operating the same |
| 11/30/1994 | EP0564493B1 Reduction of metal oxides |
| 11/30/1994 | CN1026797C A process for producing metals and metal alloys in a smelt reduction vessel |
| 11/23/1994 | EP0625869A2 Method for the melting, combustion or incineration of materials and apparatus therefor |
| 11/23/1994 | CN1095420A Efflux reduction smelting method |
| 11/22/1994 | US5366897 Method for controlling the conversion of iron-containing reactor feed into iron carbide |
| 11/22/1994 | US5366538 Process for the production of a metal melt |
| 11/22/1994 | US5366537 Interposing inert gas between carbonaceous material and oxygen |
| 11/15/1994 | US5364448 Process for the production of liquid metal from fine-grain metal oxide particles and reducing and smelting furnace for carrying out the process |
| 11/09/1994 | EP0623684A2 Process for utilising iron-containing wastes or residues |
| 11/08/1994 | CA2122529A1 Process for utilising iron-containing wastes or residues |
| 11/02/1994 | EP0622465A1 Method for producing metal from metal ores |
| 11/02/1994 | EP0621903A1 Method for reducing material containing metal oxide in solid phase. |
| 11/02/1994 | CN1026433C Apparatus for production of ferrous and non-ferrous metals |
| 10/27/1994 | WO1994024318A1 An electrical method for conversion of molecular weights of particulates |
| 10/27/1994 | DE4313630A1 Process for producing metal from metal ores |
| 10/27/1994 | CA2160773A1 An electrical method for conversion of molecular weights of particulates |
| 10/20/1994 | DE4320359C1 Process for the direct reduction of substances containing iron oxide to sponge iron and carburising to Fe3C |
| 10/18/1994 | US5356524 Electrical method for conversion of molecular weights of particulates |
| 10/12/1994 | CN1093412A Process for the direct reduction of iron oxide-containing materials with solid carbonaceous reducing agents |
| 10/12/1994 | CN1093411A Metallurgical processes and apparatus |
| 10/11/1994 | US5354356 Combusting petroleum coke in melter gasifier; pollution control |
| 10/05/1994 | EP0618302A1 Metallurgical processes and appartus |
| 10/05/1994 | EP0617739A1 Method for continuously melting down scrap metal |
| 09/30/1994 | CA2115625A1 Metallurgical processes and apparatus |
| 09/28/1994 | EP0617136A1 Installation for iron ore reduction in a circulating fluidized bed with solid materials flow regulating means |
| 09/27/1994 | US5350434 Process and apparatus for making molten steel |
| 09/15/1994 | WO1994020791A1 Plasma fusion furnace and method of its operation |
| 09/14/1994 | EP0614990A1 Process for the reduction of iron ores with reducing agents containing solid carbon |
| 09/13/1994 | US5346528 Continuous automatic steel making method and facility |
| 09/07/1994 | CN1025872C Method of starting a plant for the production of pig iron or steel pre-material as well as arrangement for carrying out the method |
| 09/01/1994 | WO1994019497A1 Method and apparatus for producing iron |
| 09/01/1994 | CA2156631A1 Method and apparatus for producing iron |
| 08/31/1994 | EP0612854A1 Process for the production of synthetic rutile |
| 08/23/1994 | US5340378 Preventing the deactivation of oxidation catalysts by desulfurization the rest reducing agent with chlorine dioxide |
| 08/23/1994 | CA1331517C Process for gaining electric energy in addition to producing molten pig iron and an arrangement for carrying out the process |
| 08/23/1994 | CA1331516C Process of, and arrangement for, recovering molten pig iron or steel pre-products from lumpy iron-oxide containing charging substances |
| 08/16/1994 | US5338336 Reacting petroleum coke, oxygen and metallized waste dusts in melter-gasifier yields reducing gases, molten iron containing other heavy metals and slag containing sulfur |
| 08/03/1994 | CN1090331A Process for producing molten pig iron or molten steel preproducts |
| 08/02/1994 | CA1331097C Process for melting metal scrap and apparatus for performing the process |
| 07/27/1994 | EP0607137A1 Continuous production of iron-carbon alloy using iron carbide |
| 07/20/1994 | CN1025505C Metal refining method |
| 07/19/1994 | US5330556 Method for treating gas and particulate solids in a fluid bed |
| 07/13/1994 | EP0605535A1 Process for production of iron. |
| 07/13/1994 | CN1089305A Shaft reduction furnace for sponge iron |
| 07/13/1994 | CN1025437C Prereduction furnace of smelting reduction facility of iron ore |
| 07/12/1994 | CA1330623C Method for manufacturing steel through smelting reduction |
| 07/06/1994 | EP0436718B1 Method of charging ore in melt-reduction |
| 06/29/1994 | CN1088618A Direct reduction technology for compound adhesive cool solidifying globus coal base |