| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 02/07/1996 | EP0696105A2 Circuit and method for controlling a transistor |
| 02/07/1996 | CN1116240A Method of direct steel-smelting of cooled agglomerated pellet |
| 02/06/1996 | US5489325 Process for producing metals and metal alloys in a smelt reduction vessel |
| 01/30/1996 | US5487764 Reclaiming and utilizing discarded and newly formed coke breeze, coal fines, and blast furnace revert materials, and related methods |
| 01/24/1996 | CN1115336A Method for preventing sponge iron from binding in production |
| 01/24/1996 | CN1030775C Method and apparatus for vertical furnace coal base reducing sponge iron |
| 01/23/1996 | US5486229 Raw material for producing ferrite dust for friction elements and method of reducing the same |
| 01/18/1996 | DE19525270A1 Increasing economy of pig iron prodn by direct redn of iron oxide |
| 01/17/1996 | EP0692543A1 Process for producing sponge iron with low sulfur content |
| 01/16/1996 | CA1337921C Method and apparatus for reduction of material containing metal oxide |
| 01/16/1996 | CA1337919C Method and apparatus for producing matte and/or metal |
| 01/04/1996 | WO1996000304A1 Direct reduction process for iron oxide-containing materials |
| 01/04/1996 | WO1996000303A1 Direct reduction process for iron oxide-containing materials |
| 01/04/1996 | WO1996000302A1 Direct reduction process for iron oxide-containing materials |
| 01/03/1996 | EP0690136A1 Method and apparatus for production of iron from iron compounds |
| 01/03/1996 | CN1114360A Method for producing direct reduced iron |
| 01/02/1996 | US5480474 Process and apparatus for smelting reduction of ores or pre-reduced metal carriers |
| 01/02/1996 | US5480473 Gases emerging from metal bath are afterburned in space above smelt by injected oxidizing agents; transferring heat |
| 12/28/1995 | WO1995035392A2 Method for reducing particulate iron ore to molten iron with hydrogen |
| 12/19/1995 | US5476532 Method for producing reducible iron-containing material having less clustering during direct reduction and products thereof |
| 12/19/1995 | CA1337743C Method and apparatus for producing molten metal from powder state ore |
| 12/13/1995 | EP0686703A1 Method of making pig iron with zinc recovery |
| 12/13/1995 | EP0686204A1 Method and apparatus for producing iron |
| 12/13/1995 | EP0621903B1 Method for reducing material containing metal oxide in solid phase |
| 12/12/1995 | US5474280 Apparatus for preheating a reactor feed |
| 12/06/1995 | EP0533866B1 Process and reduction and melting furnace for producing liquid metal from fine metal oxide particles |
| 12/05/1995 | US5472478 Reduction of metal oxides and vessel |
| 12/05/1995 | CA2034871C Method and apparatus for feeding reacting substances into a smelting furnace |
| 11/28/1995 | US5470375 Method of processing waste material containing non ferrous metal oxides |
| 11/16/1995 | WO1995030626A1 Recovery of chemical values from industrial wastes |
| 11/16/1995 | CA2188658A1 Recovery of chemical values from industrial wastes |
| 11/14/1995 | US5466278 Process for the manufacture of steel |
| 11/08/1995 | EP0680519A1 High-production rotary furnace steelmaking. |
| 11/07/1995 | US5464596 Method for treating waste streams containing zinc |
| 11/07/1995 | US5464464 Method for reducing particulate iron ore to molten iron with hydrogen as reductant |
| 10/31/1995 | CA1337456C Method of smelting metal oxide material |
| 10/11/1995 | EP0676478A1 Process for producing an iron melt |
| 10/11/1995 | CN1109911A Method for producing spongy iron by coal-base gas-making in vertical furnace |
| 10/11/1995 | CN1109910A Direct reduction process for oxygen-rich fusion gasifying furnace |
| 10/10/1995 | CA2011702C Method for smelting reduction of ni ore |
| 10/10/1995 | CA2010356C Method for manufacturing molten metal containing ni and cr |
| 10/10/1995 | CA1337242C Process for the detoxification of steel plant wastes |
| 10/10/1995 | CA1337241C Method for smelting reduction of iron ore and apparatus therefor |
| 10/04/1995 | CN1109694A Electric arc fusion furnace |
| 10/04/1995 | CN1109510A Oxygen coal-gas base directly reducing technology |
| 09/27/1995 | EP0673681A1 Method of treating fine ore |
| 09/27/1995 | CN1109102A Method and apparatus for directly deoxidation of powder mineral or fine mineral sand |
| 09/26/1995 | US5453111 Method for separation of metals from waste stream |
| 09/26/1995 | US5453103 Compression, clean burning fuel |
| 09/19/1995 | US5451246 Process and device for heating and melting lumps of sponge iron |
| 09/13/1995 | EP0671595A1 Electric arc fusion furnace |
| 09/13/1995 | EP0671474A1 Method of charging ore |
| 09/13/1995 | EP0670910A1 Process and device for producing pig iron from iron ore or for thermally and/or chemically treating an easily decomposable material |
| 09/13/1995 | CN1108307A Method and apparatus for producing iron |
| 09/06/1995 | CN1107893A Production method for spongy iron |
| 09/05/1995 | US5447551 Reacting spent process gas with chlorine dioxide in the reduction of metal ores |
| 09/05/1995 | US5447550 Controlling transport of friable solid particles through pipes |
| 08/30/1995 | CN1107517A A converter process for the production of iron |
| 08/29/1995 | US5445668 Reduced iron particles obtained are melted in a melter gasifier under supply of coal and oxygen-containing gas under simultaneous formation of the reducing gas |
| 08/29/1995 | US5445667 Separating prereduced particles from flue gas, cooling, carbiding, returning particles to fluidization chamber |
| 08/29/1995 | US5445363 Apparatus for the pneumatic transport of large iron-bearing particles |
| 08/23/1995 | CN1107181A Method for producing reducible iron-containing material having less clustering during direct reduction and products thereof |
| 08/23/1995 | CN1029566C Process for production of liquid metal from finegrain metal oxide part6icles and reducing and smelting furnace for carrying out process |
| 08/22/1995 | CA1336746C Process for producing chromium containing molten iron |
| 08/22/1995 | CA1336745C Method for producing chromium containing molten iron with low sulphur concentration |
| 08/22/1995 | CA1336744C Method for smelting reduction of iron ore and apparatus therefor |
| 08/09/1995 | EP0665899A1 Process and device for melting scrap |
| 08/09/1995 | CN1106464A Converter fly ash steelmaking |
| 08/08/1995 | US5439504 Direct-reduction process for directly reducing particulate iron-oxide-containing material |
| 08/08/1995 | CA1336542C Method for smelting and reducing iron ores and apparatus therefor |
| 08/02/1995 | CN1029411C Integral parallel-flow continous steel-smelting method and equipment |
| 08/01/1995 | US5437708 Carburizing the metal oxide particle with a mixture reducing gas containing carbon monooxide, carbon dioxide, methane, hydrogen and water |
| 08/01/1995 | US5437150 Fluid production method and apparatus |
| 07/27/1995 | WO1995020022A1 Utilizing discarded carbon |
| 07/27/1995 | CA2179885A1 Utilizing discarded carbon |
| 07/25/1995 | US5435832 Process for utilising iron-containing wastes or residues |
| 07/25/1995 | US5435831 Separating and reducing fines with lumps and pellets |
| 07/25/1995 | CA1336359C Method and apparatus for the direct reduction of iron |
| 07/20/1995 | DE4426623A1 Prodn. of iron carbide |
| 07/19/1995 | EP0663450A1 Method of producing iron melt |
| 07/18/1995 | US5433768 Process for producing liquid pig iron from lump iron ore using plastic and petroleum coke |
| 07/18/1995 | US5433767 Using carbon as a reducing agent for ferric oxide to form ferrous oxide and to iron |
| 07/11/1995 | US5431711 Iron oxide to iron |
| 07/11/1995 | US5431710 Method for continuously producing iron, steel or semi-steel and energy |
| 07/04/1995 | US5429658 Method of making iron from oily steel and iron ferrous waste |
| 07/04/1995 | CA1336136C Process for feeding heat energy into a molten metal bath |
| 06/29/1995 | WO1995017527A1 Process for extracting metal from metal ores |
| 06/28/1995 | EP0659887A1 Melt-reduction process for production pf pig iron in the converter |
| 06/27/1995 | CA1336042C Method of charging chromium ores in a smelting reduction |
| 06/14/1995 | EP0657550A1 Method and apparatus for producing iron |
| 06/14/1995 | EP0657549A1 Process for producing an iron melt |
| 06/14/1995 | EP0605535A4 Process for production of iron. |
| 06/14/1995 | CA2136692A1 Method and apparatus for producing iron |
| 06/11/1995 | CA2137766A1 Process for producing an iron melt |
| 05/31/1995 | EP0655084A1 Improved molten metal decomposition apparatus and process |
| 05/24/1995 | EP0654538A1 Method for working up zinc-, lead- and iron oxide-bearing material by the rotary-kiln volatilising process |
| 05/24/1995 | CN1028544C Pre-heating and pre-reduction of metal oxide ore using high temperature off-gases |
| 05/18/1995 | DE4331159C1 Utilisation of waste products in the mfr. of additives for metal casting industries |
| 05/16/1995 | CA2118383A1 Process for the production of iron carbide |
| 05/10/1995 | CN1102440A Fusion reducing iron smelting method and its equipment |