| Patents for C21C 5 - Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel (14,381) |
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| 08/11/1981 | US4283042 Method for repairing the tap hole of a converter |
| 08/11/1981 | CA1106621A1 Method for producing improved metal castings by pneumatically refining the melt |
| 08/11/1981 | CA1106599A1 Method of protection against the wear of a blow nozzle used in the refining of molten metals |
| 08/06/1981 | WO1981002167A1 Method of torch gunite application of linings of metallurgical installations |
| 08/06/1981 | WO1981002166A1 Method of making steel |
| 08/06/1981 | WO1981002165A1 Device for treatment of molten metal with gases and powder-like materials |
| 08/05/1981 | EP0033289A1 Process for the decarburisation of chromium containing melts |
| 08/04/1981 | US4281823 Tiltable converter arrangement |
| 08/04/1981 | CA1106183A1 Method of treating molten ferrous metal to produce low carbon steel |
| 07/28/1981 | US4280844 Including aluminum powder and a thermosetting binder for spalling and corrosion resistance |
| 07/28/1981 | US4280838 Carbon dioxide |
| 07/28/1981 | US4280836 Method of preheating iron scraps in steel-making by the electric arc furnace |
| 07/28/1981 | US4280688 Tiltable converter arrangement |
| 07/22/1981 | EP0032350A2 Method for refining a molten metal bath in a crucible with oxygen injection from above, and crucible used therefor |
| 07/22/1981 | EP0032343A1 Method for the gaseous stirring of a molten metal bath |
| 07/22/1981 | EP0032173A1 Converter and apparatus for supplying fluids to a converter |
| 07/21/1981 | CA1105255A1 Desulfurization lance for cast iron or steel |
| 07/14/1981 | US4278464 Oxidation of fuel at surface |
| 07/14/1981 | US4278241 Top cone cooling system for basic oxygen furnace |
| 07/09/1981 | WO1981001862A1 Metallurgical melting and refining apparatus |
| 07/08/1981 | EP0031776A1 Combined blowing method for refining metals in a converter |
| 07/07/1981 | US4277638 Prefabricated unit for a DC arc furnace |
| 07/07/1981 | US4277054 Multiflow refining blastpipes for equipping converters for refining |
| 07/01/1981 | EP0031160A1 Metallurgical melting and refining installation |
| 06/30/1981 | US4275871 Metallurgical vessel and supporting means |
| 06/24/1981 | EP0030932A1 Process for plasma-melting of metals and alloys |
| 06/24/1981 | EP0030818A2 Improved method of decarburizing molten metal |
| 06/23/1981 | US4274622 Device for separating slag from molten bath |
| 06/23/1981 | CA1103449A1 Oxygen lance assembly |
| 06/23/1981 | CA1103447A1 Furnace cooling apparatus |
| 06/17/1981 | EP0030501A1 Porous refractory element and its manufacturing method |
| 06/17/1981 | EP0030360A2 Steel-making process |
| 06/17/1981 | EP0030344A2 Process for increasing the heat utilisation in the production of steel from solid iron matter |
| 06/16/1981 | US4273316 Metallurgical vessel suspension system |
| 06/16/1981 | US4273312 Method of process off-gas control |
| 06/16/1981 | US4273074 Cooling device for hot gases in pipes |
| 06/16/1981 | US4272989 Instrument lance for basic oxygen steelmaking furnace |
| 06/16/1981 | CA1103294A1 Apparatus for collecting and removing smoke and fumes from a melting furnace plant |
| 06/10/1981 | EP0029878A1 Supporting and anchoring of a convertor on a trunnion ring |
| 06/09/1981 | US4272287 Decarbonization, oxidation |
| 06/09/1981 | US4272286 Oxidation, desulfurization, shielding |
| 06/09/1981 | US4272063 Brick assembly for use in metallurgical vessels |
| 06/09/1981 | CA1102588A1 Steel wire manufacture |
| 06/03/1981 | EP0029796A1 System for measuring the height of the slag in a metallurgical vessel, and for determining its physical condition |
| 06/02/1981 | US4270949 Making of steel by the BOF process |
| 06/02/1981 | CA1102117A1 Melt processing apparatus with tiltable melt receptacle |
| 06/02/1981 | CA1102110A1 Apparatus for applying refractory material onto the inner surface of a furnace |
| 05/20/1981 | EP0028998A1 Process for conditioning the slag during the refining of a metal bath |
| 05/20/1981 | EP0028968A1 Process for treating a metal in a melting bath |
| 05/19/1981 | US4268543 Process and device for producing the refractory lining of metallurgical vessels |
| 05/19/1981 | US4268014 Transport lift truck for metallurgical vessels, particularly steel mill converters |
| 05/19/1981 | CA1101476A1 Electric furnace station noise and smoke pollution control system |
| 05/19/1981 | CA1101222A1 Method of controlling molten steel temperature and carbon content in oxygen converter |
| 05/13/1981 | EP0028592A1 Transportation lifting truck |
| 05/13/1981 | EP0028570A1 Process for refining a molten metal by oxygen injection |
| 05/12/1981 | US4266758 Support for a metallurgical vessel |
| 05/05/1981 | US4265433 Apparatus for repairing the tap hole of a converter |
| 05/05/1981 | US4265136 Torque support arrangement |
| 04/28/1981 | US4264355 Methods for producing steel from iron sponge in electric furnaces |
| 04/28/1981 | US4264061 Pneumatic seals for hot metal furnace enclosure |
| 04/28/1981 | US4264060 Apparatus for treating metallic scrap in the recovery of metal therefrom |
| 04/28/1981 | CA1099919A1 Lance head for puddling lance |
| 04/21/1981 | US4262825 Louvered clamshell door assembly for preheater charging bucket |
| 04/21/1981 | CA1099507A1 Method and apparatus for treating metallic scrap in the recovery of metal therefrom |
| 04/14/1981 | US4261752 Fine particles of refractory in pitch for reinforcement and repairof steel furnaces |
| 04/14/1981 | US4261554 Tap-hole closing arrangement of a metallurgical vessel |
| 04/14/1981 | US4261551 Method and means for supplying nozzles with gaseous and/or liquid hydrocarbons |
| 04/14/1981 | CA1099245A1 Method and apparatus for removing zinc type metals and compounds in dust recovery process in iron manufacture |
| 04/07/1981 | US4260415 By oxidation in inert gas shroud |
| 04/07/1981 | US4260414 Process for recovering and utilizing useful substances from molten metal produced during reduction treatment of steel slag |
| 04/07/1981 | US4260140 Metallurgical vessel |
| 04/01/1981 | EP0026118A1 Method and apparatus for collecting fumes from an electric-arc furnace |
| 04/01/1981 | EP0026031A1 Metallurgical vessel assembly |
| 03/31/1981 | CA1098321A1 Production process of stainless steel by means of a converter |
| 03/31/1981 | CA1098320A2 Process for the direct production of steel |
| 03/18/1981 | EP0025151A1 Tubular holder for oxygen lances |
| 03/17/1981 | US4256466 Carbon is reacted with carbon dioxide to form carbon monoxide |
| 03/17/1981 | US4256289 Converter arrangement |
| 03/11/1981 | EP0025027A1 Filling post for reladling liquid metal out of a tiltable metallurgical vessel |
| 03/11/1981 | EP0024637A1 Process for operating a change-over valve for supplying a nozzle in steel-producing convertor |
| 03/10/1981 | US4255184 Method and apparatus for refining ferrosilicon |
| 03/03/1981 | US4253644 Fluid closure for and method of preventing flow through an opening in a fluid and particulate confining and conveying structure |
| 02/25/1981 | EP0024250A1 Process and plant for the recovery of carbon-rich waste products |
| 02/24/1981 | CA1096176A1 Refining process based on top-blowing with oxygen |
| 02/24/1981 | CA1096149A1 Method and apparatus for repairing the tap hole of a converter |
| 02/17/1981 | US4251271 Submerged injection of gas into liquid-pyrometallurgical bath |
| 02/17/1981 | US4251270 Method of controlling steel making process under atmospheric pressure |
| 02/17/1981 | US4251269 Monitoring decarburization by spectrum analysis |
| 02/17/1981 | CA1095728A1 Renitrogenation of basic-oxygen steels during decarburization |
| 02/17/1981 | CA1095709A1 Cooling assembly for metallurgical vessels |
| 02/17/1981 | CA1095708A1 Method for preheating the oxygen in an oxygen steel making process |
| 02/11/1981 | EP0023627A1 Process for producing low-hydrogen content steel in a bottom-blown oxygen converter |
| 02/10/1981 | US4249721 Apparatus for preheating material to be charged into steel making equipment |
| 02/10/1981 | US4249719 Tuyere for the injection of reaction gas |
| 02/03/1981 | US4248409 Steel furnace nozzle arrangement |
| 02/03/1981 | CA1094803A1 Distributor manifold for a steel refining vessel |
| 01/28/1981 | EP0023058A1 Method and device for regulating an arc furnace |
| 01/27/1981 | US4247086 Lance hoisting and skull detecting apparatus for basic oxygen steelmaking furnaces |
| 01/27/1981 | CA1094325A1 Metal refining method |
| 01/27/1981 | CA1094312A1 Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross section |