| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 06/22/1994 | EP0355163B1 Process for producing molten stainless steel |
| 06/22/1994 | EP0328677B1 PROCESS FOR MELT REDUCTION OF Cr STARTING MATERIAL AND MELT REDUCTION FURNACE |
| 06/15/1994 | CN1087951A Process and apparatus for direct steelmaking using ore |
| 06/14/1994 | US5320676 Petroleum coke as fuel in melter gasifier |
| 06/09/1994 | WO1994012672A1 Process and device for producing pig iron from iron ore or for thermally and/or chemically treating an easily decomposable material |
| 06/09/1994 | CA2150456A1 Process and device for producing pig iron from iron ore or for thermally and/or chemically treating an easily decomposable material |
| 06/07/1994 | CA1330103C Method for smelting reduction in electric furnace |
| 06/01/1994 | EP0599760A1 Installation for iron ore reduction in a bed of solid particles fluidized by a reducing gas |
| 06/01/1994 | DE4240197A1 Verfahren zur Herstellung von Roheisen aus Eisenoxiden und Vorrichtung zur thermischen und/oder chemischen Behandlung eines leicht zerfallenden Materials oder zur Herstellung von Roheisen mittels dieses Verfahrens A process for producing pig iron from iron oxides and apparatus for the thermal and / or chemical treatment of a readily disintegrating material or for producing pig iron by this method |
| 06/01/1994 | DE4240194C1 Producing pig-iron, esp. sponge iron from fine ore - with initial division of the ore into fine and coarse fractions and use of mechanical means to break up clusters forming in fluid-bed reactors |
| 06/01/1994 | CN1087299A Raw material for producing ferrite dust for friction elements and method of reducing the same |
| 06/01/1994 | CN1024809C Microorganism having low acetate forming capability and process for production of useful substrate using same |
| 05/26/1994 | WO1994011536A1 High-production rotary furnace steelmaking |
| 05/25/1994 | CN2166136Y Vertical metallized spheroid production apparatus |
| 05/25/1994 | CN1087124A Reduction iron-smelting process with carbon containing pellets-iron bath fusion |
| 05/17/1994 | CA1329482C Method for the pretreatment of a lumpy carbon carrier |
| 05/11/1994 | WO1994010348A1 Process and device for melting scrap |
| 05/11/1994 | EP0596107A1 Fluidized bed preliminary reducing furnace for raw material comprising oxide |
| 05/11/1994 | EP0596095A1 Process and device for heating and melting lumps of sponge iron |
| 05/11/1994 | CN1086546A A method for protecting the refractory lining in the gas space of a metallurgical reaction vessel |
| 05/11/1994 | CN1086545A A method for intensifying the reactions in metallurgical reaction vessels |
| 05/11/1994 | CA2147972A1 Process and device for the melting down of scrap |
| 04/28/1994 | WO1994009163A1 Method for continuously melting down scrap metal |
| 04/28/1994 | DE4236510A1 Verfahren und Vorrichtung zum Einschmelzen von Schrott Method and apparatus for melting scrap |
| 04/27/1994 | EP0594557A1 Process for producing molten pig iron or molten steel pre-products |
| 04/20/1994 | EP0592831A1 A method for protecting refractory lining in the gas space of a metallurgical reaction vessel |
| 04/20/1994 | EP0592830A1 A method for intensifying the reactions in metallurgical reaction vessels |
| 04/14/1994 | WO1994008057A1 Method for the enhanced recovery of zinc oxide |
| 04/14/1994 | WO1994008055A1 Iron making process using petroleum coke |
| 03/31/1994 | DE4232285A1 Working-up material contg. iron oxide and/or non-ferrous heavy metal cpds. - using pulsed reducing flame fed directly into furnace |
| 03/30/1994 | CN1084568A Process and apparatus for heating and melting sponge iron in lump form |
| 03/29/1994 | US5298056 Direct steel-making process |
| 03/22/1994 | US5296015 Method for the pneumatic transport of large iron-bearing particles |
| 03/16/1994 | EP0331751B1 PROCESS FOR DECARBURIZING HIGH-Cr MOLTEN PIG IRON |
| 03/03/1994 | WO1994004633A1 Improved molten metal decomposition apparatus and process |
| 03/03/1994 | CA2140876A1 Improved molten metal decomposition apparatus and process |
| 03/02/1994 | EP0585190A1 Apparatus for the reduction of iron ores in a circulating fluidized bed |
| 03/01/1994 | CA1327274C Method of recovering metals and metal alloys and a plant therefor |
| 02/16/1994 | EP0583164A1 The production of stainless steel |
| 02/16/1994 | EP0583126A1 The production of high titania slag from ilmenite |
| 02/15/1994 | US5287382 Wall electrode for a DC electric metallurgical furnace |
| 02/15/1994 | US5286273 Method for steel making in high temperature reactor |
| 02/12/1994 | CA2103843A1 Production of stainless steel |
| 02/03/1994 | DE4325531A1 Reduced ferrite powder for vehicle brake system friction elements - includes oxide(s) of silicon, magnesium, calcium, aluminium and zinc. |
| 02/02/1994 | CN1023652C Prereduction furnace of senelting reduction facility of iron ore |
| 01/19/1994 | EP0579591A1 Process for the production of a metal melt |
| 01/19/1994 | CN1080961A Process and apparatus for reducing spongy iron in coal-base shaft furnace |
| 01/17/1994 | CA2100602A1 Process for the production of a metal melt |
| 12/29/1993 | EP0576414A1 Process for the production of molten pig iron or steel pre-products as well as arrangement for carrying out the process |
| 12/28/1993 | CA1325519C Method for preparing ferrocarbon intermediate product for use in steel manufacture and furnace for realization thereof |
| 12/22/1993 | CN2149960Y Concurrent combined-type quick-acting fluidised-bed reactor |
| 12/21/1993 | US5271609 Plant comprising a shaft |
| 12/16/1993 | DE4224055C1 Redn. of iron@ ore into solid metallised ferrous prod. - moves ferrous sludge briquettes with min. heat loss to the refining vessel to save energy consumption |
| 12/09/1993 | WO1993024668A1 Synthetic rutile production |
| 12/09/1993 | CA2136426A1 Synthetic rutile production |
| 12/07/1993 | US5268019 Separation of compressed air stream; compression, combustion of gaseous fuel; expansion |
| 12/01/1993 | EP0474704A4 Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 11/25/1993 | WO1993023575A1 Process and device for heating and melting lumps of sponge iron |
| 11/25/1993 | DE4216891A1 Verfahren und Einrichtung zum Erhitzen und Schmelzen von stückigem Eisenschwamm Method and apparatus for heating and melting of lumpy sponge iron |
| 11/24/1993 | EP0571358A1 Process for the direct reduction of particulate material containing iron oxide |
| 11/18/1993 | EP0570046A1 Method and apparatus for producing steel melts |
| 11/17/1993 | CN1078499A A smelting reduction method with high productivity |
| 11/16/1993 | CA1324265C Method of recovering metals and metal alloys and a plant therefor |
| 11/09/1993 | US5259865 Very low slag iron making process |
| 11/09/1993 | US5259864 Reducing slag formation and increasing carbon level in iron, melter gasifier, petroleum coke combustion, fluidized bed, mixing carbon dioxide and reduction gas, gas flow, direct reduced iron from cooled reduction gas and ferrous material |
| 11/09/1993 | US5259594 Hot dust recycling apparatus |
| 11/02/1993 | US5258054 Method for continuously producing steel or semi-steel |
| 10/27/1993 | CN1022573C Prereduction furnace of smelting reduction facility of iron ore |
| 10/19/1993 | CA1323198C Process of reducing fine-grained iron-containing material by means of solid carbonaceous reducing agents |
| 10/14/1993 | WO1993020245A1 Combined process for generating metallurgical coke and sponge iron |
| 10/06/1993 | EP0563559A2 A smelting reduction method with higher productivity |
| 10/05/1993 | CA1322735C Microorganism having low acetate forming capability, and process for production of useful substrate using same |
| 09/30/1993 | DE4210003A1 Kombiniertes Verfahren zur Erzeugung von metallurgischem Koks und Eisenschwamm Combined method for the production of metallurgical coke and sponge iron |
| 09/22/1993 | CN1022191C Process of and apparatus for post combustion |
| 09/14/1993 | US5244490 As fuel for melting, calcium carbonate filler |
| 09/14/1993 | US5244488 Direct smelting process with a thermal plasma |
| 09/08/1993 | EP0422004B1 Method and apparatus for reduction of material containing metal oxide |
| 09/08/1993 | CN1022048C Process and apparatus for making molten iron |
| 09/06/1993 | CA2090906A1 Method for improving quality of reforming gas used in the direct reduction of metal oxides |
| 09/01/1993 | EP0541711A4 Method for controlling the conversion of iron-containing reactor feed into iron carbide |
| 08/26/1993 | DE4205096A1 Solid and liq. waste recovery - comprises adding dry matter contg. top gas dust to homogenised mixt. for thermal processing |
| 08/25/1993 | CN1021917C Method for controlling flow rate of gas for prereducing ore and apparatus thereof |
| 08/24/1993 | US5238487 Process for the production of pig iron and sponge iron |
| 08/24/1993 | US5238484 Plant for the production of molten metals and method |
| 08/11/1993 | EP0358711B1 Plasma fired feed nozzle |
| 08/11/1993 | CN1075201A Circulating fluidized bed furnace for pre-reduction of fine iron ore |
| 08/11/1993 | CA2061202A1 High-production rotary furnace steelmaking |
| 08/05/1993 | WO1993015232A1 Method for reducing material containing metal oxide in solid phase |
| 08/05/1993 | CA2128605A1 Method for reducing material containing metal oxide in solid phase |
| 07/22/1993 | WO1993014228A1 Improved plant and process for fluidized bed reduction of ore |
| 07/22/1993 | WO1993014030A1 Method for the recovery of zinc oxide |
| 07/20/1993 | US5229064 Having at least two raw material supply ports and two reductive gas supply ports; improved mixing and dispersion |
| 07/20/1993 | US5228901 Smelting bath, reactor, ore stream and gas flow of methane combustion |
| 07/14/1993 | EP0551217A1 Direct steel-making process |
| 07/13/1993 | US5227116 Entraining particulate iron oxide by the reducing offgas upwardly through a vertical riser duct; separating and feeding to smelter |
| 07/13/1993 | US5226951 Method of starting a plant for the production of pig iron or steel pre-material as well as arrangement for carrying out the method |
| 06/23/1993 | CN1021348C Method for smelting reduction of ni ore |
| 06/16/1993 | CN1073212A Entirely flow continuous steelmaking and iron-smelting method and apparatus |
| 06/02/1993 | CN1072614A Method and apparatus for treating gases and particulate solids in fluid bed |
| 05/26/1993 | EP0543758A1 Apparatus for reducing iron oxide materials in a circulating fluidized bed |