| 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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| 10/04/1977 | US4052195 Method for melting iron-containing material |
| 10/04/1977 | US4052044 Method of and apparatus for the decrusting of metallurgical lances |
| 10/04/1977 | US4052043 Apparatus for continuously refining molten metals |
| 10/04/1977 | US4052005 Oxygen lance nozzle |
| 09/27/1977 | US4051213 Process for pressing briquettes from fine-grained fluorspar and pressed briquettes thus obtained |
| 09/27/1977 | US4050683 Smelting plant and method |
| 09/27/1977 | US4050682 Method and apparatus for handling off-gases from metal refining vessel |
| 09/27/1977 | US4050681 Apparatus for the controlled feeding of a refining gas and of a fluid protective medium |
| 09/20/1977 | US4049249 Tiltable converter |
| 09/20/1977 | US4049246 Bumper guard for steel converting apparatus enclosure |
| 09/13/1977 | US4048352 Method of producing a refractory lining in a cylinder or tube |
| 09/13/1977 | US4047937 Method for controlling the operation of a steel refining converter |
| 09/13/1977 | US4047936 Process for refining hot metal to steel |
| 09/13/1977 | US4047708 Detachable lip ring for steelmaking converter |
| 09/13/1977 | US4047707 Process and converter for refining liquid metals |
| 08/30/1977 | US4045300 Method for reducing the response time in oxygen measuring probes |
| 08/30/1977 | US4045213 Deoxidizing andor carburizing ferrous metal bath; oxidizing, scavenging and neutral gases |
| 08/30/1977 | US4045007 Blast pipe for metallurgical converters |
| 08/23/1977 | US4043801 Method of simultaneously controlling temperature and carbon content of molten steel at the end-point in oxygen top-blown converter |
| 08/23/1977 | US4043800 Oxygen gas |
| 08/23/1977 | US4043799 Method and device for blowing oxygen in metal refining converters in unstationary manner |
| 08/16/1977 | US4042410 Method for defoaming molten slag |
| 08/16/1977 | US4042378 Controlling pig iron refining |
| 08/16/1977 | US4042223 Arrangement for and a method of introducing particulate material into molten baths |
| 08/09/1977 | US4040819 Oxidizing carbon monoxide present in off-gases |
| 08/09/1977 | US4040814 Reacting vanadium trioxide with carbon |
| 08/09/1977 | US4040612 Blast pipe assembly for the bottom plate of a converter or furnace for refining metals |
| 08/09/1977 | US4040611 Device for clamping the base plate of a steel refining converter |
| 08/09/1977 | US4040609 Metal smelting plant with treatment stand to regulate the analysis of metal smelts, particularly for desulphurization of liquid crude iron or liquid unrefined steel |
| 08/09/1977 | US4040608 Method for the recovery of gases coming from refining furnaces |
| 08/02/1977 | US4039321 Method for producing a grain-oriented electrical steel by an oxygen-blown convertor |
| 08/02/1977 | US4039320 Reducing material for steel making |
| 08/02/1977 | US4039280 Linings for high temperature ovens |
| 08/02/1977 | US4039174 Reline tower for a metallurgical furnace |
| 07/26/1977 | US4038483 Means for direct current arc furnaces |
| 07/19/1977 | US4036481 Steel converter vessel tuyere block construction |
| 07/12/1977 | US4035179 Method and apparatus for controlling pollution in steel furnaces |
| 07/05/1977 | US4034146 Method and apparatus for equalizing the wall lining wear in three phase alternating current electric arc furnaces |
| 07/05/1977 | US4033562 Furnace for melting solid ferrous pieces |
| 07/05/1977 | US4033463 Work-facilitating apparatus for lining converters, metallurgical furnaces, holding vessels and like equipment |
| 06/28/1977 | US4032704 Method and apparatus for treating a metal melt |
| 06/28/1977 | US4032308 Filtering a gas stream |
| 06/28/1977 | US4032119 Lance seal for converter vessel gas collecting hood |
| 06/28/1977 | US4031819 Apparatus for collecting and conveying of fumes from a furnace |
| 06/21/1977 | US4031309 Arrangement for producing steel |
| 06/21/1977 | US4031308 Direct current arc furnace hearth connection installation |
| 06/14/1977 | US4029497 Manufacture of alloy steels and ferrous alloys |
| 05/31/1977 | US4027095 Hermetically sealed arc furnace |
| 05/31/1977 | US4026443 Slide closure arrangement for converters |
| 05/24/1977 | US4025059 Device for the continuous production of steel |
| 05/17/1977 | US4024337 DC arc furnace and starting electrode construction |
| 05/17/1977 | US4023962 Process for regenerating or producing steel from steel scrap or reduced iron |
| 05/17/1977 | US4023785 Tiltable metallurgical converter arrangement |
| 05/17/1977 | US4023781 Tuyere for metallurgical vessels |
| 05/17/1977 | US4023676 Lance structure and method for oxygen refining of molten metal |
| 05/10/1977 | US4022612 Oxygen, water vapor |
| 05/10/1977 | US4022447 Supersonic nozzle for submerged tuyere oxygen steelmaking process |
| 05/10/1977 | US4022445 Converter bottom structure |
| 04/26/1977 | US4019725 Gas seal and silencer for use on tuyere body |
| 04/19/1977 | US4018974 Direct current arc furnace |
| 03/29/1977 | US4014532 Ladle refractory lining preheater |
| 03/29/1977 | US4014530 Protective nozzle for metallurgic vessels, particularly for steel mill converters |
| 03/08/1977 | US4011290 Method and device for dispersing a melt with a fluid jet |
| 03/08/1977 | US4010936 Process for tapping a steel-making converter |
| 03/01/1977 | US4010029 Steelmaking |
| 03/01/1977 | US4010027 Processes for steel making by oxygen refining of iron |
| 03/01/1977 | US4010026 Arc furnace steelmaking |
| 03/01/1977 | US4010023 Utilization of formerly wasted slag |
| 02/22/1977 | US4009024 Process for regeneration and reuse of steelmaking slag |
| 02/15/1977 | US4008074 With oxygen and carbonaceous dust |
| 02/08/1977 | US4007035 Method of using an expendable tap hole tuyere in open hearth decarburization |
| 02/01/1977 | US4006284 Extended arc furnace and process for melting particulate charge therein |
| 01/25/1977 | US4004920 Method of producing low nitrogen steel |
| 01/25/1977 | US4004792 Metallurgical furnace having fluid injection means for a melt in the furnace |
| 01/11/1977 | US4002467 Method for recovering reaction gases from steel converters which are bottom blown with oxygen and cooled with hydrocarbons |
| 01/04/1977 | US4001012 Method of producing stainless steel |
| 01/04/1977 | US4001011 Pyrometallurgical recovery of iron from iron silicate slags |
| 01/04/1977 | US4000886 Furnace exhaust duct |
| 12/28/1976 | US4000361 Electroslag remelting furnace with relative displacement of a mould and an ingot being cast |
| 12/28/1976 | US3999977 Method for controlling the injection of flux into a steelmaking vessel as a function of pressure differential |
| 12/28/1976 | US3999976 Preserving inner walls of the furnace |
| 12/21/1976 | US3999000 Self-commutating DC arc furnace having starting electrode and method of its operation |
| 12/21/1976 | US3998626 Method for air pollution control combined with safe recovery and control of gases from a bottom-blown steel converter vessel |
| 12/21/1976 | US3998624 Lime andor limestone flux; calcium fluoride; metal aluminum silicate; iron or its oxide |
| 12/21/1976 | US3998440 Furnace vessels |
| 12/14/1976 | US3997712 Electric arc furnace |
| 12/14/1976 | US3997335 Method of optimum burning of carbon monoxide in a converter |
| 12/14/1976 | US3997334 Introduction of a liquid into a receptacle such as a converter |
| 12/14/1976 | US3997148 Coupler for tuyere punches |
| 12/07/1976 | US3995841 Converter drive and bearing arrangement |
| 11/30/1976 | US3994676 Method and apparatus for protecting basic refractory shapes in a basic oxygen furnace |
| 11/16/1976 | US3992194 Method and apparatus for use in the treatment of metals in the liquid state |
| 11/16/1976 | US3991813 Melt casting apparatus |
| 11/09/1976 | US3990686 Furnace for producing steel from scrap steel and the like |
| 11/09/1976 | US3990294 Smelting system for increased lining service of refining vessels |
| 11/02/1976 | US3989091 Method for electroslag remelting of titanium or its alloys and a device for effecting same |
| 10/26/1976 | US3988422 Method of treating converter gas |
| 10/26/1976 | US3988147 Iron oxide |
| 10/19/1976 | US3986865 Process for producing steel |
| 10/12/1976 | US3985945 Direct-current arc furnace |