| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 05/21/1985 | US4518417 Method of, and arrangement for, reducing oxide-containing fine-particle ores |
| 05/02/1985 | EP0139310A1 Process for obtaining molten carbon-containing iron from spongy iron |
| 04/30/1985 | US4514219 Smelting with nitrogen,carburization with coke |
| 04/24/1985 | EP0138100A2 Process for manufacturing active carbon-rich masses or bodies |
| 04/16/1985 | US4511372 Carbon gasification method |
| 04/16/1985 | CA1185437A1 Method and apparatus for the reduction of metal ores |
| 04/16/1985 | CA1185432A1 System for coal blowing in iron oxide reducing kilns |
| 04/03/1985 | EP0135526A1 Refractory lining for coal gasifiers. |
| 03/27/1985 | EP0134852A1 Production of liquid iron |
| 03/26/1985 | US4507079 Apparatus for discharging solids from a shaft furnace |
| 03/12/1985 | US4504311 Process and apparatus for a direct formation of molten iron |
| 03/12/1985 | US4504307 Method for carrying out melting, melt-metallurgical and/or reduction-metallurgical processes in a plasma melting furnace as well as an arrangement for carrying out the method |
| 03/12/1985 | US4504043 Apparatus for coal-gasification and making pig iron |
| 02/26/1985 | CA1182999A1 Power feeding process of furnaces intended for heating metallurgical products |
| 01/22/1985 | US4494984 Method for direct reduction of iron oxide utilizing induction heating |
| 01/22/1985 | CA1181238A1 Method of gas production |
| 01/15/1985 | US4493732 Method for implementing pyro-metallurgical processes |
| 01/15/1985 | CA1180904A1 Process for the exploitation of low-grade oxidic and iron-bearing complex ores or concentrates |
| 01/02/1985 | CA1180189A Continuous reduction of iron-containing material |
| 12/25/1984 | US4490168 Process of making steel by melting sponge iron in an electric arc furnace |
| 12/19/1984 | EP0128347A2 Method for reducing iron ore |
| 12/18/1984 | CA1179505A1 Method and apparatus for the gaseous reduction of iron ore to sponge iron |
| 12/12/1984 | EP0128131A1 Sulphur removing method during pig iron melting |
| 11/28/1984 | EP0126391A1 Iron production method |
| 11/28/1984 | EP0126191A2 Vibratory fluidized bed reactor |
| 11/27/1984 | US4484944 Circulation, separation, high speed, silica, pressurization, exhaustion |
| 11/20/1984 | CA1178060A1 Method for achieving low sulfur levels in the dri product from iron oxide reducing kilns |
| 11/20/1984 | CA1178059A1 Process for treating iron sponge |
| 11/06/1984 | US4480373 Steel making method |
| 10/17/1984 | EP0122239A2 Process of producing pig iron from iron ore concentrate |
| 10/09/1984 | CA1175659A1 Method and apparatus for selective reduction of metallic oxides |
| 10/03/1984 | EP0120509A1 Process for directly reducing iron oxide-containing sintered materials to sponge iron in a rotary kiln |
| 09/25/1984 | US4473399 Method of supplying coal gas to a smelting works |
| 09/25/1984 | CA1174855A1 Method of producing molten metal consisting mainly of manganese and iron |
| 09/19/1984 | EP0118655A2 Method of carrying out metallurgical or chemical processes, and a low-shaft furnace |
| 09/13/1984 | WO1984003521A1 Process of producing pig iron from iron ore concentrate |
| 09/12/1984 | EP0118412A2 Method of carrying out melting, melt-metallurgical and/or reduction-metallurgical processes in a plasma melting furnace as well as an arrangement for carrying out the method |
| 09/12/1984 | EP0117928A1 Process for production of steel by the melt-down of iron-sponge in an electric-arc-furnace |
| 09/11/1984 | US4470581 Apparatus for selective reduction of metallic oxides |
| 09/05/1984 | EP0117318A1 Process for the continuous melting of sponge iron |
| 09/04/1984 | US4469510 From iron oxide and carbon, blasting top of melt with oxygen |
| 09/04/1984 | US4469509 Carbonaceous reducing agent, blowing with oxygen |
| 08/30/1984 | WO1984003276A1 Fire-proof lining for coal gasifiers |
| 08/15/1984 | EP0115756A1 A method and arrangement for producing metals, in particular molten pig iron, steel pre-material or ferroalloys |
| 08/14/1984 | CA1172455A1 Method and apparatus for the direct reduction of iron in a shaft furnace using gas from coal |
| 08/07/1984 | US4464197 Method for making iron by induction heating |
| 07/31/1984 | US4462793 Rotary kiln and method of using such a kiln |
| 07/31/1984 | US4462792 Reheating metal bodies with recovered blast-furnace energy |
| 07/25/1984 | EP0114040A1 Method and melt-down gasifier for producing molten pig iron or crude steel products |
| 07/17/1984 | CA1170838A1 Process for treating metallic starting materials for smelting plants, particularly iron sponge particles |
| 06/26/1984 | US4456476 Melting scrap iron using controlled fluid flow |
| 06/26/1984 | CA1169662A1 Method for recovering useful metals from dust discharged from metal refining metallurgical furnace |
| 06/20/1984 | EP0111176A1 Process and device for the instant production of reduced iron pellets and liquid iron from iron oxide pellets |
| 06/19/1984 | CA1169246A1 Apparatus for separating agglomerated particulate matter |
| 06/12/1984 | US4454013 Method of separating iron and its alloy metals from fine-grained crude oxidic products |
| 05/22/1984 | US4449671 Apparatus for separating agglomerated particulate matter |
| 05/16/1984 | EP0108501A1 A method for producing a carbonaceous solid reductant for direct reduction of iron ore |
| 05/16/1984 | EP0108232A1 Process for the reduction of molten metal ores |
| 05/15/1984 | US4448402 Apparatus for directly making liquid pig-iron from coarse iron ore |
| 05/10/1984 | WO1984001729A1 Processing of metal |
| 05/02/1984 | EP0107131A2 Process and plant for the production of synthesis gas |
| 04/17/1984 | US4443250 Process of producing sponge iron by a direct reduction of iron oxide-containing materials |
| 04/10/1984 | US4441921 Production and treatment of ferrochromium |
| 03/27/1984 | US4439233 Direct reduction of iron |
| 03/27/1984 | CA1164388A1 Process for the production of reduced iron and thermal cracking of heavy oils |
| 03/13/1984 | US4436551 Carbon as a reducing agent |
| 03/13/1984 | US4436286 Multistage |
| 02/28/1984 | US4434003 Steel making method |
| 02/28/1984 | US4434001 Method for manufacturing metal from fine-grain metal-oxide material |
| 02/21/1984 | US4432789 Method of minimizing energy consumption when reducing iron oxide with reducing gases |
| 02/21/1984 | CA1162406A1 Combination method and device for gasifying coal and for reducing metal ores |
| 02/15/1984 | EP0100601A1 A method for activating petroleum coke |
| 02/14/1984 | CA1162053A1 Process and apparatus for continuously reducing and melting of metal oxides and/or pre-reduced metallic materials |
| 02/14/1984 | CA1162052A1 Highly orientable iron particles |
| 02/14/1984 | CA1162051A1 Reduction of iron oxide to conserve hydrogen |
| 02/07/1984 | US4430117 Production of steel |
| 02/07/1984 | US4430116 Method and apparatus for heating or heating and reduction raw materials for a metallurgical furnace utilizing waste gases from the same furnace |
| 01/31/1984 | US4428772 Efficiency and economy |
| 01/24/1984 | US4427370 Method of treating raw materials in an iron reduction process |
| 01/24/1984 | CA1160848A1 System for control of sinter formation in iron oxide reducing kilns |
| 01/11/1984 | EP0097803A2 Method for the operation of a reactor for the production of synthesis gas, and installation |
| 01/10/1984 | US4425659 Metal oxide reduction furnace |
| 01/10/1984 | CA1160056A1 Method of, and arrangement for, producing molten pig iron or steel pre-material |
| 01/04/1984 | EP0097292A2 Process and installation for making binderless heating briquettes |
| 12/13/1983 | US4420332 Process for the production of reduced iron and thermal cracking of heavy oils |
| 12/13/1983 | CA1158443A1 Method and apparatus for producing molten iron |
| 12/13/1983 | CA1158442A1 Self-reducing iron oxide agglomerates |
| 12/01/1983 | EP0057706A4 Reduction of ferrotitaniferous materials. |
| 11/30/1983 | EP0095035A2 Process for supplying coal gas to metal works |
| 11/23/1983 | EP0094928A2 Discharging device for a shaft furnace |
| 11/23/1983 | EP0094707A1 Method and apparatus for the production of liquid iron from iron oxide |
| 11/22/1983 | US4416693 Hydrogen or carbon monoxide as reducing agent |
| 11/22/1983 | US4416689 Heating iron ores and carbon-containing materials with oxygen in an electric arc furnace |
| 11/22/1983 | US4416688 Direct reduction of ores and concentration of metallic values |
| 11/15/1983 | US4415357 Stabilization of an aqueous slurry by converting the calcium oxide and calcium sulfide to calcium carbonate; disposal |
| 11/01/1983 | US4412858 Method of converting iron ore into molten iron |
| 11/01/1983 | US4412674 High-temperature reduced iron production |
| 10/11/1983 | US4409023 Process for directly making liquid pig-iron from coarse iron ore |
| 10/11/1983 | US4409022 Method of producing low-sulfur, reduced, iron ore pellets |
| 10/05/1983 | EP0090438A1 Direct reduction method for iron ores |