| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 03/09/2000 | WO2000012766A1 A process and an apparatus for producing metals and metal alloys |
| 03/09/2000 | WO2000012431A1 Process for producing iron carbide |
| 03/07/2000 | US6033456 Integration of partial oxidation process and direct reduction reaction process |
| 03/07/2000 | CA1340922C Method of producing stainless molten steel by smelting reduction |
| 03/01/2000 | EP0982407A1 Process for melting inorganic substances |
| 03/01/2000 | CN1246160A Refractory wall, metallurgical vessel comprising such refractory wall and method in which such refractory wall is applied |
| 03/01/2000 | CN1246159A Producing iron from solid iron carbide |
| 02/29/2000 | US6030434 Method for hot agglomeration of solid metallized iron particles to produce alloyed briquettes |
| 02/29/2000 | US6030432 Fractionating fine ore by aid of reducing gas into coarse grain fraction and fine grain fraction, reducing each fraction by the reducing gas in a separate fluidized bed, directly injecting secondary reducing gas, discharging reduced ore |
| 02/24/2000 | WO2000009766A1 Method for the thermal processing of residues containing heavy metals and iron oxide |
| 02/24/2000 | WO2000009765A1 Shaft furnace |
| 02/24/2000 | WO2000009764A1 Method for producing liquid pig iron |
| 02/24/2000 | CA2338074A1 Method for producing liquid pig iron |
| 02/24/2000 | CA2336964A1 Method for the thermal processing of residues containing heavy metals and iron oxide |
| 02/23/2000 | CN1245538A Direct reduction of metal oxide agglomerates |
| 02/22/2000 | US6027545 Hydrogen contained in the reducing gas stream purged from the reduction reactor is separated and recycled back to the reduction reactor, improving efficiency |
| 02/17/2000 | DE19928935A1 Production of iron briquettes and/or cold sponge iron involves delivery of hot sponge iron either to the briquetting plant, or via a cooling zone, to the product unloading zone |
| 02/17/2000 | DE19900232C1 Treatment of reduced fine granulated iron ores for subsequent melting in electric arc furnace, consists of pre-compacting ore with exclusion of air and sintering it by eddy current heating achieved by means of high-frequency magnetic field |
| 02/16/2000 | EP0979313A1 Method for thermal treatment of granulated iron ore before reduction |
| 02/16/2000 | CN1244911A Device for discharging or mixing lump materials |
| 02/10/2000 | WO2000006783A1 A direct smelting process |
| 02/10/2000 | WO2000006782A1 A direct smelting process and apparatus |
| 02/10/2000 | DE19860281A1 Operation of a shaft furnace for production of metals involves use of, at most, all but one of the nozzles and/or lances on the furnace circumference for delivery of oxygen or a gas mixture containing oxygen into the furnace |
| 02/10/2000 | DE19849336A1 Operation of a shaft furnace, particularly a cupola furnace, for production of metals involves suction of a gas mixture containing oxygen by means of at least one injector nozzle from the tuyere duct(s) |
| 02/02/2000 | EP0976843A1 Treatment of steel plant waste metal oxides by firing the same in the form of coke containing briquettes |
| 02/02/2000 | EP0976841A1 Method of operating movable hearth furnace |
| 02/02/2000 | EP0976840A1 Method of operating rotary hearth furnace for reducing oxides |
| 02/02/2000 | EP0976839A1 Method for producing metal from metal ores |
| 02/02/2000 | EP0975813A1 Process for producing liquid pig iron or liquid metallurgical preparations |
| 01/27/2000 | WO2000004197A1 Induction furnace for a metal reduction and melting process |
| 01/27/2000 | DE4102189C2 Verfahren und Vorrichtung zur Eingabe reagierender Substanzen in einen Schmelzofen Method and apparatus responsive to input substances in a furnace |
| 01/27/2000 | DE19933536A1 Producing steel in an electric arc furnace with use of reduced iron pellets as principal material, with certain proportion of reduced iron pellets introduced into submerged-electrode electric arc melting furnace |
| 01/26/2000 | EP0973950A1 Apparatus for manufacturing molten pig iron and reduced iron by utilizing fluidized bed, and method therefor |
| 01/26/2000 | CN1242755A Operation management method of iron carbide prodn. process |
| 01/25/2000 | CA2126188C Method for continuously melting down scrap metal |
| 01/19/2000 | CN1242056A Production method of metallic iron |
| 01/18/2000 | US6015527 Facility for producing reduced iron |
| 01/13/2000 | WO2000001856A1 Method and apparatus for reducing iron-oxides-particles having a broad range of sizes |
| 01/13/2000 | WO2000001855A1 A direct smelting process |
| 01/13/2000 | WO2000001854A1 Direct smelting vessel and direct smelting process |
| 01/12/2000 | EP0970254A1 Directly charging device for directly charging reduced fine iron ore into melter-gasifier |
| 01/12/2000 | EP0970253A1 Process for direct production of cast iron from fine iron ore and fine coal and apparatus suitable to carry out said process |
| 01/12/2000 | CN1241166A Production method of iron carbide |
| 01/11/2000 | CA2131666C Method for producing iron-containing material having less clustering during direct reduction and products thereof |
| 01/05/2000 | EP0969107A1 Process for producing molten pig iron or molten steel pre-products and hot briquetted iron |
| 01/05/2000 | EP0969106A1 Rotary hearth furnace and its operating method |
| 01/05/2000 | EP0969105A1 Rotary hearth furnace for reducing oxides, and method of operating the furnace |
| 01/05/2000 | EP0968311A1 Two step twin-single fluidized bed type pre-reduction apparatus for pre-reducing fine iron ore, and method therefor |
| 01/05/2000 | EP0671595B1 Electric arc fusion furnace with controlled oxygen blast |
| 12/29/1999 | EP0966546A1 Method and device for processing reducing gas for reducing ores |
| 12/29/1999 | EP0950117A4 A method and an apparatus for producing metals and metal alloys |
| 12/29/1999 | CN1047798C Method for producing spongy iron and coproducing synthetic ammonia by reducing gas |
| 12/29/1999 | CN1047797C Ironmaking and oxygen generating combination process |
| 12/22/1999 | EP0965651A2 Pyrometallurgical processing of metal and organics containing waste in a smelt chamber |
| 12/22/1999 | CN1047631C Process and appts. for mfg. of steel from iron carbide |
| 12/21/1999 | US6004504 Method and apparatus for controlling bath level and measurement of bath characteristics |
| 12/21/1999 | US6004373 Method for producing iron carbide |
| 12/15/1999 | EP0963946A1 Production method of iron carbide |
| 12/15/1999 | EP0963449A1 Electric furnace with insulated electrodes and process for producing molten metals |
| 12/15/1999 | EP0766748B1 Direct reduction process for iron oxide-containing materials |
| 12/15/1999 | CN1238810A Device for dosed introduction of fine particle material into reactor vessel |
| 12/15/1999 | CN1238809A Method and apparatus for producing metals and metal alloys |
| 12/15/1999 | CN1238742A Iron carbied manufacturing process and apparatus |
| 12/15/1999 | CA2274188A1 Process for pyrometallurgical processing, in a furnace chamber, of metal-containing waste |
| 12/14/1999 | US6001148 Process for obtaining metal from metal oxide |
| 12/09/1999 | WO1999063119A1 Sustainable steelmaking by intensified direct reduction of iron oxide and solid waste minimisation |
| 12/09/1999 | DE19825093A1 Direct reduction of metal oxides |
| 12/07/1999 | US5997609 Sponge iron production process and plant |
| 12/07/1999 | US5997608 Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process |
| 12/07/1999 | US5997596 Oxygen-fuel boost reformer process and apparatus |
| 12/01/1999 | EP0961094A1 Feeding and distributing device for rotary platforms, particularly for rotary-hearth furnaces |
| 12/01/1999 | CN1236815A Quick reduction process for cold solidified spheroids of iron concentrate in rotary kiln |
| 12/01/1999 | CN1046962C Process for producing liquid raw iron or steel basic products and iron sponge and plant implementing |
| 12/01/1999 | CN1046961C Process for producing liquid raw iron or steel basic priducts and iron sponge and plant for implementing |
| 12/01/1999 | CN1046960C Process and apparatus for producing molten pig iron |
| 11/30/1999 | US5992335 Method of blowing synthetic resin into furnace and apparatus therefor |
| 11/25/1999 | WO1999060172A1 Continous metal melting process and apparatus |
| 11/25/1999 | CA2332108A1 Continous melting process and apparatus |
| 11/24/1999 | EP0958386A1 Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment |
| 11/24/1999 | EP0958385A1 Method of agglomerating oil-containing steel mill waste |
| 11/23/1999 | US5989309 Utilizing discharge gas (reducing gas) from melter gasifier as lower temperature carrier gas for pre-reduced fine iron ore without the need for any other carrier gas |
| 11/23/1999 | US5989308 Including a direct-reduction shaft furnace for processing lumpy iron ore and a fluidized bed reactor for processing fine ore |
| 11/23/1999 | US5989307 Smelting iron oxide with coal and oxygen gas within blast furnace plant converted by replacing furnace with smelter vessel while utilizing original casting house, gas discharge means, cooling water supply system, storage bins for ore/coal |
| 11/23/1999 | US5989019 Direct reduction method and rotary hearth furnace |
| 11/17/1999 | CN1235644A Process for returning finely dispersed solids discharged with carrier gas from reactor vessel |
| 11/17/1999 | CN1235268A Feeding and distributing device for rotary platforms, particularly for rotary-hearth furnaces |
| 11/09/1999 | US5980606 Charging smelter with source of iron oxide, carbonaceous fuel, and source of zinc; blowing oxygen into layer of foaming slag; reducing iron oxide; releasing effluents and precipitating sulfuric content as solid zinc sulfide |
| 11/04/1999 | WO1999055919A1 Method for reducing metal oxides and device for implementing said method |
| 11/04/1999 | CA2324883A1 Method for reducing metal oxides and device for implementing said method |
| 11/03/1999 | EP0953058A1 Production method of metallic iron |
| 11/03/1999 | EP0953057A1 Process for returning finely dispersed solids discharged with a carrier gas from a reactor vessel |
| 11/03/1999 | CN1233663A Electric arc melting steel furnace for pelletized spongy iron |
| 11/03/1999 | CN1233662A Furnace for continuous prodn. vertical pelletized spongy iron |
| 11/03/1999 | CN1046138C Equipment for producing molten pig iron by direct reduction |
| 11/02/1999 | CA2130223C Method and apparatus for the removal of hydrogen sulfide from a process gas stream |
| 10/29/1999 | CA2269977A1 Feeding and distributing device for rotary platforms, particularly for rotary-hearth furnaces |
| 10/27/1999 | EP0952231A1 Method of producing reduced iron agglomerates |
| 10/27/1999 | EP0952230A1 Method of producing reduced iron agglomerates |
| 10/27/1999 | EP0952112A1 Iron carbide manufacturing process and apparatus |
| 10/27/1999 | CN1233293A Method for blowing fine particles containing metal oxide into a reducing gas |