| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 07/20/1982 | US4340420 Chromiferous product |
| 07/13/1982 | CA1127397A1 Briquet sheet breaking by cooling and bending |
| 07/06/1982 | US4338123 Method and apparatus for the reduction of metal ores |
| 06/30/1982 | EP0054926A2 A process for the production of reduced iron and thermal cracking of heavy oils |
| 06/29/1982 | US4337084 Injection of char through discharge end for deposition on bed |
| 06/22/1982 | US4336063 Method and apparatus for the gaseous reduction of iron ore to sponge iron |
| 06/15/1982 | US4334920 Integrated process for thermal cracking of heavy oil and reduction of iron ores |
| 06/15/1982 | CA1125505A1 Fabricated tuyere |
| 06/08/1982 | US4333761 Method for direct reduction of iron using high sulfur gas |
| 06/08/1982 | CA1125029A1 Process for the direct reduction of iron ores |
| 06/08/1982 | CA1124976A1 Manufacture of elongate workpiece from pelleted material |
| 05/27/1982 | WO1982001724A1 A method for manufacturing metal from fine-grain metal-oxide material |
| 05/25/1982 | US4331470 Method for the direct reduction of iron in a shaft furnace using gas from coal |
| 05/25/1982 | CA1124141A1 Process of treating sponge iron for protection against reoxidation and apparatus for carrying out the process |
| 05/19/1982 | EP0051607A1 Metallurgical process and furnace |
| 05/18/1982 | US4330325 Direct reduction rotary kiln with improved air injection |
| 05/18/1982 | CA1123597A1 Ore reduction reactor discharge regulator |
| 04/20/1982 | US4325731 Process of producing reducing gas from solid fuels |
| 04/13/1982 | US4324390 Apparatus for manufacturing steel from iron ore dust by direct reduction |
| 04/07/1982 | EP0049236A1 Method of treating sponge iron |
| 03/30/1982 | US4322243 Combination method and device for gasifying coal and for reducing metal ores |
| 03/24/1982 | EP0048008A1 Method and apparatus for the direct production of hot metal from lump iron ore |
| 03/16/1982 | CA1119813A1 Hot discharge direct reduction furnace |
| 03/09/1982 | US4318736 Method for manufacturing steel from iron ore dust by direct reduction |
| 03/04/1982 | WO1982000663A1 Reduction of ferrotitaniferous materials |
| 03/02/1982 | US4317677 Process for producing liquid crude iron and reduction gas |
| 03/02/1982 | CA1119001A1 Process of directly reducing iron oxide-containing materials |
| 02/23/1982 | US4316739 Method for producing molten iron |
| 02/23/1982 | US4316738 Economical process for producing metal particles for magnetic recording |
| 02/17/1982 | EP0046146A1 Use of a muffle furnace for the dezincification of oxidic ferriferous materials containing zinc |
| 02/17/1982 | EP0046145A1 Process and apparatus for the direct reduction of oxidic ferriferous materials |
| 02/16/1982 | US4315620 Stack for the thermal treatment of material |
| 02/16/1982 | CA1118211A1 Method for the direct reduction of iron using gas from coal |
| 01/27/1982 | EP0044669A1 Self-reducing iron oxide agglomerates |
| 01/26/1982 | US4312666 Reduction with carbon to sponge iron, electro-slag resistance melting, electromagnetic separation |
| 01/13/1982 | EP0043373A1 Process and device for continuous reduction and melting of metal oxides and/or prereduced metal materials. |
| 01/12/1982 | US4310350 Recovering non-volatile metals from dust containing metal oxides |
| 01/12/1982 | US4310349 Sodium tripolyphosphate matrix |
| 01/12/1982 | US4310299 Method for firing a rotary kiln with pulverized solid fuel |
| 01/12/1982 | US4310298 Method and device for producing coal dust |
| 12/29/1981 | US4308055 Process of briquetting sponge iron-containing material |
| 12/22/1981 | US4306903 Method for reducing particulate iron oxide to molten iron with solid reductant and oxy-fuel burners |
| 12/22/1981 | US4306901 Process for forming steel product from iron while avoiding the liquid state |
| 12/22/1981 | US4306643 Coal feed pipe and positioner |
| 12/16/1981 | EP0041940A1 Method of treating metallic additives used in metallurgy, especially sponge iron |
| 12/15/1981 | US4305752 Metallic iron particles for magnetic recording |
| 12/15/1981 | CA1114158A1 Gas distributing closure plug for metallurgical reactor |
| 12/08/1981 | US4304597 System for control of sinter formation in iron oxide reducing kilns |
| 12/08/1981 | US4304595 Method of manufacturing crude iron from sulphidic iron-containing material |
| 12/01/1981 | CA1113256A1 Waelz process of volatilizing zinc and lead from iron oxide containing materials |
| 12/01/1981 | CA1113252A1 Direct reduction process in a rotary kiln |
| 12/01/1981 | CA1113251A1 Method for cooling high-temperature reduced iron |
| 11/26/1981 | WO1981003342A1 Metallurgical process and furnace |
| 11/25/1981 | EP0040285A1 Metallurgical process and furnace |
| 11/24/1981 | US4301928 Heat monitoring and transfer arrangement for sponge iron pellets |
| 11/17/1981 | US4300948 Method of continuous reduction of iron oxides |
| 11/17/1981 | CA1112456A1 Method of manufacturing crude iron from sulphidic iron-containing material |
| 11/17/1981 | CA1112452A1 Method for continuously manufacturing high- temperature reducing gas |
| 11/10/1981 | US4299694 Method and apparatus for char separation from the discharge materials of an iron oxide reducing kiln |
| 11/03/1981 | US4298190 Apparatus for gaseous reduction of metal ores with cooling loop |
| 11/03/1981 | CA1111820A1 Method and apparatus for drying and finely grinding coal |
| 11/03/1981 | CA1111654A1 Production of metal strip |
| 10/14/1981 | EP0037809A1 Method of and arrangement for producing molten pig iron or steel prematerial |
| 10/13/1981 | US4294609 Process for the reduction of iron oxide |
| 10/13/1981 | CA1110454A1 Method and apparatus for reducing particulate iron oxide to molten iron with solid reductant |
| 09/23/1981 | EP0036382A1 Process and apparatus for producing liquid iron |
| 09/22/1981 | US4290587 Ore treating apparatus |
| 09/15/1981 | CA1108865A1 Method and apparatus for the direct reduction of iron ore |
| 09/15/1981 | CA1108864A1 Direct-reduction process carried out in a rotary kiln |
| 09/09/1981 | EP0035487A2 Process for the direct production of steel from raw materials that contain iron oxide |
| 09/01/1981 | US4286775 Apparatus for producing molten iron from iron oxide with coal and oxygen |
| 09/01/1981 | CA1107970A1 Direct reduction process for iron ores with floating layer system |
| 08/18/1981 | CA1107336A1 Shaft furnace for producing low-oxygen iron-base metallic powder for powder metallurgy |
| 08/11/1981 | CA1106619A1 Waelz process of volatilizing zinc and lead from iron oxide containing materials |
| 08/11/1981 | CA1106598A1 Apparatus for monitoring the feeding of particulate materials to a packed bed furnace |
| 08/05/1981 | EP0033021A1 Process for the direct reduction in a rotary furnace of matter that contains iron oxide |
| 08/04/1981 | CA1106187A1 Method for cooling sponge metal |
| 08/04/1981 | CA1106178A1 Production of carbon monoxide by the gasification of carbonaceous materials |
| 07/28/1981 | US4280840 Method of processing sponge iron |
| 07/28/1981 | CA1105710A1 Process for reducing particulate metal ore |
| 07/28/1981 | CA1105682A1 Continuous processes and equipment for the treatment of solid substances in general, with specific applications for the gasification of coals and schists and direct reduction of iron ores |
| 07/14/1981 | CA1104827A1 Process for treating a mud produced during gas scrubbing in a blast furnace or a steelworks |
| 06/30/1981 | CA1103932A1 Manufacture of steel products from solid materials |
| 06/30/1981 | CA1103920A1 Shaft furnace |
| 06/25/1981 | WO1981001715A1 Process and device for continuous reduction and melting of metal oxides and/or prereduced metal materials |
| 06/24/1981 | EP0030932A1 Process for plasma-melting of metals and alloys |
| 06/23/1981 | US4274867 Method for producing low-carbon steel from iron ores containing vanadium and/or titanium |
| 06/16/1981 | US4273314 Direct reduction rotary kiln with improved air injection |
| 06/02/1981 | US4270740 Apparatus for producing molten iron by submerged combustion |
| 06/02/1981 | US4270739 Apparatus for direct reduction of iron using high sulfur gas |
| 06/02/1981 | CA1102139A1 Method and apparatus for reducing particulate iron oxide to metallic iron with solid reductant |
| 05/26/1981 | CA1101677A1 Process and apparatus for the production of intermediate hot metal |
| 05/19/1981 | US4268412 Method for continuously manufacturing high-temperature reducing gas |
| 05/19/1981 | US4268304 Direct reduction process in a rotary kiln |
| 05/19/1981 | US4268303 Direct reduction process for producing reduced iron |
| 05/12/1981 | US4266967 Process for producing metallized pellets from raw pellets by controlling distribution of temperature in a rotary kiln |
| 05/12/1981 | US4266966 Steelmaking dust is purified by pelletization, heating with a reducing agent, and exploding the pellets |
| 05/05/1981 | US4265868 Production of carbon monoxide by the gasification of carbonaceous materials |
| 04/28/1981 | US4264355 Methods for producing steel from iron sponge in electric furnaces |
| 04/15/1981 | EP0026780A1 Manufacture of steel from iron ores |