| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 01/01/1980 | US4181812 Iron oxide melt reduction furnace and method |
| 01/01/1980 | US4181520 Sponge iron |
| 12/25/1979 | CA1068560A Method of inhibiting rusting of sponge iron |
| 12/18/1979 | US4179284 Passing ore countercureently to a reducing gas mixture, smelting |
| 12/18/1979 | US4179282 Method for the reduction of metal oxides |
| 12/18/1979 | US4179281 Using the exhaust gas of the reducing furnace |
| 12/18/1979 | US4179280 Direct-reduction process carried out in a rotary kiln |
| 12/18/1979 | US4179278 Carbonaceous fuel as reductant |
| 12/11/1979 | US4178176 From ilmenite by reductive roasting, leaching and oxidation |
| 12/11/1979 | US4178170 For use in electric furnaces |
| 12/11/1979 | US4178151 Apparatus for monitoring the feeding of particulate materials to a packed bed furnace |
| 11/27/1979 | US4175952 Recovery of iron and titanium metal values |
| 11/27/1979 | US4175951 Method and apparatus for preparing a reducing gas stream |
| 11/27/1979 | US4175732 Melting of fine particulate material in a high-speed rotary furnace |
| 11/20/1979 | US4174963 Recovery of titanium metal values |
| 11/06/1979 | US4173465 Method for the direct reduction of iron using gas from coal |
| 10/09/1979 | CA1063835A1 Method and apparatus for continuous passivation of sponge iron material |
| 10/09/1979 | CA1063808A1 Process for the reduction of complex metallic ores |
| 10/02/1979 | US4169533 Method of treating sponge iron |
| 09/20/1979 | WO1979000700A1 Process for reducing and heat treating |
| 09/18/1979 | CA1062428A1 Method and apparatus for continuous passivation of sponge iron material |
| 08/28/1979 | US4165978 Briquet sheet breaking by cooling and bending |
| 08/21/1979 | US4165221 Formed carbon fuel briquettes, process for forming the same and process for utilizing the same in the manufacture of steel |
| 08/14/1979 | CA1060218A1 Process and a furnace plant for batch production of sponge metal |
| 08/07/1979 | CA1060107A1 Polyphase arc heater system |
| 07/10/1979 | US4160867 Method and apparatus for melting machining chips |
| 07/10/1979 | US4160663 Method for the direct reduction of iron ore |
| 07/10/1979 | CA1057960A1 Method of ore reduction with an arc heater |
| 07/10/1979 | CA1057953A1 Iron or steelmaking process |
| 07/03/1979 | CA1057537A1 Method of making iron powder |
| 07/03/1979 | CA1057509A1 Metal powder production by direct reduction in an arc heater |
| 06/26/1979 | US4159201 Process for producing a carbon monoxide-rich gas |
| 05/29/1979 | US4156659 Catalytic reforming |
| 05/22/1979 | CA1054800A1 Method and apparatus for direct reduction of iron ore |
| 05/08/1979 | US4153450 Flow and composition of reducing gas |
| 05/08/1979 | US4153426 Synthetic gas production |
| 05/01/1979 | US4152139 Method for cooling sponge metal |
| 04/24/1979 | US4150972 Controlling carburization in the reduction of iron ore to sponge iron |
| 04/24/1979 | CA1053006A1 Method of reducing iron ore |
| 04/17/1979 | CA1052579A1 Method of making steel |
| 04/03/1979 | US4147334 Method and apparatus of producing iron |
| 04/03/1979 | CA1051813A1 Method of feeding green pellets onto grate of pretreatment furnace in the production of reduced pellets |
| 03/27/1979 | US4146390 Furnace and method for the melt reduction of iron oxide |
| 03/27/1979 | CA1051202A1 Method for gaseous reduction of metal ores |
| 03/20/1979 | US4145211 With moving ambient atmospheric air, no reoxidation |
| 03/20/1979 | US4145210 Process for indurating dried pellets in a rotary kiln |
| 03/20/1979 | CA1050766A1 Method and means for reducing material containing ferric oxide |
| 03/20/1979 | CA1050765A1 Method for making steel |
| 03/13/1979 | US4144052 Process of directly reducing iron-containing oxidic materials |
| 03/13/1979 | CA1050277A1 Method for melting sponge iron |
| 03/06/1979 | CA1049792A1 Process and apparatus for producing molten iron |
| 03/06/1979 | CA1049780A1 Nozzle for rotary kiln |
| 02/27/1979 | CA1049266A1 Process for the direct reduction of metal oxides |
| 02/20/1979 | US4140301 Method and apparatus for reducing particulate iron oxide to metallic iron with solid reductant |
| 02/13/1979 | US4139416 Carbonaceous material with high characteristics of surface area and activity and process for producing the same |
| 02/13/1979 | CA1048275A1 Method and apparatus for processing reduced iron |
| 02/08/1979 | WO1979000058A1 A method of manufacturing crude iron from sulphidic ironcontaining material |
| 02/08/1979 | WO1979000055A1 A method for the manufacture of an additive material for the production of crude iron |
| 01/30/1979 | CA1047255A1 Roasting process in the direct reduction of iron oxide-containing ore |
| 01/23/1979 | US4135914 Provides salt-free water for recycling |
| 12/26/1978 | US4131452 Method for direct manufacture of crude steel |
| 12/26/1978 | CA1044897A1 Pellets useful in shaft furnace direct reduction and method of making same |
| 12/12/1978 | US4129289 Shaft furnace with bottom discharge device |
| 12/05/1978 | CA1043574A1 Method and apparatus for producing iron from oxidic iron ores |
| 10/24/1978 | US4121922 Method and apparatus for measuring percentage reduction in a metal ore reduction reactor |
| 10/24/1978 | CA1040863A1 Process for the production of molten metal |
| 10/03/1978 | US4118017 Shaft furnace design |
| 10/03/1978 | CA1039510A1 Desulfurization iron oxide pellets |
| 10/03/1978 | CA1039500A1 Rotary kiln and hearth furnace |
| 09/26/1978 | US4116679 Metallized iron briquet |
| 09/26/1978 | US4116678 Method of producing iron |
| 09/12/1978 | US4113468 Continuous smelting method |
| 09/05/1978 | US4111687 Process for the production of intermediate hot metal |
| 09/05/1978 | CA1037720A1 Process for producing high-grade metallic products from solid slags and high-grade metallic products |
| 08/29/1978 | US4110108 Method of producing cast iron |
| 08/22/1978 | US4108636 Forming reducing gas using stack gas and reaction product of oil and oxygen |
| 08/08/1978 | US4105457 Reduced metallized iron with binder of hydrated lime and sodium silicate |
| 07/25/1978 | US4102530 Rotating furnaces |
| 07/11/1978 | US4099963 Method for the batchwise reduction of metal ores |
| 07/11/1978 | US4099962 Method and apparatus for measuring and controlling the percentage reduction of ore in a moving bed gaseous reduction reactor |
| 07/11/1978 | US4099960 Method of smelting metallic material, particularly iron sponge |
| 07/04/1978 | US4098604 Method for reduction in a fluid bed of fine grained material containing iron oxide |
| 07/04/1978 | US4098496 Apparatus for direct reduction of iron ore |
| 06/20/1978 | US4095974 High temperature chemical reaction processes utilizing fluid-wall reactors |
| 06/13/1978 | US4094667 Melting of fine particulate material in a high-speed rotary furnace |
| 06/13/1978 | US4094665 Method for simultaneous combined production of electrical energy and crude iron |
| 06/06/1978 | US4093455 Compacted, passivated metallized iron product |
| 05/16/1978 | US4089681 Iron ore reduction, working |
| 05/16/1978 | US4089677 Metal refining method and apparatus |
| 05/02/1978 | US4087275 Method for direct reduction of sulfur-containing iron ore |
| 05/02/1978 | US4087274 Method of producing a partially reduced product from finely-divided metal sulphides |
| 04/18/1978 | US4084958 Method of reducing finely grained material containing iron oxides in a fluid bed |
| 04/04/1978 | US4082545 Reduction of iron ore in fluidized bed reactors |
| 04/04/1978 | US4082543 Method for reducing particulate iron oxide to metallic iron with solid reductant |
| 04/04/1978 | US4082254 Heat exchanger and application thereof to realize an ore reducing furnace |
| 03/21/1978 | US4080511 Direct current electric arc furnace |
| 03/21/1978 | US4080195 Melt reduction of iron ore |
| 03/14/1978 | US4079185 Direct current arcing electrodes |
| 03/14/1978 | CA1027762A1 Method and apparatus for the reduction of iron ore |
| 02/28/1978 | US4076954 Chemical reduction, smelting |