| Patents for F27B 3 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces (6,383) |
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| 01/07/1981 | EP0021608A1 Process and apparatus for casting fused refractory oxides having high melting points |
| 12/16/1980 | CA1091736A1 Ladle for induction metallurgical treatment |
| 12/09/1980 | US4238634 Gas tight seal for electrodes in smelting furnaces |
| 12/09/1980 | US4238632 Arc furnace for making steel from directly reduced iron |
| 12/09/1980 | CA1091282A1 Melting furnace |
| 12/09/1980 | CA1091281A1 Melting furnace |
| 12/02/1980 | US4236915 Producing a metal matte |
| 12/02/1980 | CA1090566A1 Mechanically stirred furnace and method of operation |
| 11/25/1980 | CA1090144A1 Stirring molten metal |
| 11/25/1980 | CA1090125A1 Linings for high temperature ovens |
| 11/18/1980 | CA1089902A1 Matte smelting |
| 10/15/1980 | EP0017150A1 Apparatus for refining molten aluminium |
| 10/14/1980 | US4228314 DC Arc furnace hearth |
| 10/07/1980 | US4226588 Smelting furnace |
| 10/07/1980 | CA1087236A1 Electric slot furnace |
| 09/30/1980 | CA1086806A1 Metallurgical pocket for inductive treatment of metals |
| 09/30/1980 | CA1086498A1 Furnace installation for the pyrometallurgical treatment of fine-grain ore concentrates |
| 09/16/1980 | CA1085613A1 Metal-melting furnace |
| 09/09/1980 | US4221922 Water cooled panel used in an electric furnace |
| 09/04/1980 | WO1980001834A1 Electric oven,particularly arcoven,and process for manufacturing such oven |
| 09/02/1980 | US4220317 Method of opening tapholes in a phosphorus furnace |
| 08/26/1980 | US4219326 Glass melting furnace structure |
| 08/26/1980 | CA1084568A1 Apparatus for electric furnace capable of effecting electrode connection and refractory lining repairs independently of each other |
| 08/06/1980 | EP0014145A1 Method of fusing vanadium pentoxide powder, and furnace therefor |
| 08/05/1980 | CA1083209A1 Apparatus for collection of tapping gases from electric smelting furnaces |
| 08/05/1980 | CA1082914A1 Furnace heating apparatus |
| 07/29/1980 | US4214736 Arc heater melting system |
| 06/25/1980 | EP0012681A1 Construction process for metallurgical electric furnaces and composite refractory element therefor |
| 06/17/1980 | US4208043 Holding vessel |
| 06/10/1980 | US4207060 Vessel for metal smelting furnace |
| 06/03/1980 | US4206312 Cooled jacket for electric arc furnaces |
| 06/03/1980 | CA1078902A1 Electric resistance furnace |
| 05/20/1980 | US4204082 DC Arc furnace having starting electrode |
| 05/20/1980 | US4203761 Process of smelting with submerged burner |
| 05/20/1980 | US4203581 Apparatus for refining molten aluminum |
| 05/20/1980 | CA1077997A1 Primary electrode arrangement for high temperature melting furnace |
| 05/13/1980 | US4202997 Atmospheric control of flux pre-melting furnace |
| 04/30/1980 | EP0010286A1 Cooled panels for walls of electric furnaces |
| 04/30/1980 | EP0010106A1 Guide troughs for molten products |
| 04/29/1980 | US4200265 Furnace for the melting and refining of copper |
| 04/29/1980 | CA1076629A1 Furnace wall structure capable of tolerating high heat load for use in electric arc furnace |
| 04/22/1980 | US4199652 Air cooled electric arc furnace |
| 04/22/1980 | CA1076178A1 Metal processing furnace and vapor nucleation method |
| 04/08/1980 | US4197422 Cooled cover for an arc furnace |
| 04/08/1980 | CA1074996A1 Flash smelting furnace |
| 03/18/1980 | US4193757 Furnace construction and methods of loading and sealing a combustion chamber therein |
| 03/11/1980 | US4192644 Cooled grate for supporting a workpiece in an oven |
| 02/20/1980 | EP0008261A1 Blocks based on electrofused refractory oxides having a high thermal conductivity element embedded therein, and process for manufacturing said blocks |
| 02/12/1980 | CA1071676A1 Electric furnace with tiltable and removable hearth |
| 02/12/1980 | CA1071400A1 Lining for a cup-shaped furnace bed |
| 01/29/1980 | CA1070743A1 D.c. arc furnace |
| 01/22/1980 | US4185159 Method for melting metals in a channel-type induction furnace |
| 01/22/1980 | US4185158 Apparatus for electric furnace capable of effecting electrode connection and refractory lining repairs independently of each other |
| 01/15/1980 | US4183508 Metallurgical induction heating apparatus |
| 01/08/1980 | US4182611 Roller-hearth furnace with shielded rollers |
| 12/25/1979 | CA1068486A Aluminum melting furnace |
| 12/18/1979 | CA1068115A1 Method for steelmaking with direct current |
| 11/28/1979 | EP0005561A1 Locking device for an arc furnace |
| 11/27/1979 | CA1067126A1 Tilt and swing lock mechanism for electric furnace |
| 11/20/1979 | US4174948 Manifold inputs and outputs for furnace regenerators |
| 11/13/1979 | CA1066019A1 Collector apparatus for gaseous reaction products |
| 10/02/1979 | US4169963 Electrically heated melting furnace for mineral materials |
| 09/11/1979 | CA1062316A1 Furnace skewback support with buckstay pivot |
| 09/04/1979 | CA1061547A1 Method and apparatus for heating a furnace chamber |
| 08/28/1979 | US4166192 Matte smelting |
| 08/23/1979 | WO1979000550A1 Guide troughs for molten products |
| 08/21/1979 | CA1060929A1 Extended arc furnace and process for melting particulate charge therin |
| 08/14/1979 | CA1060218A1 Process and a furnace plant for batch production of sponge metal |
| 07/31/1979 | CA1059380A1 Industrial furnace roof assembly and components thereof |
| 07/24/1979 | US4162156 Slag-free |
| 07/24/1979 | CA1059026A1 Dialdehyde treatment of diphtheria toxin and derivative obtained |
| 07/24/1979 | CA1058862A1 Continuous melt furnace |
| 07/17/1979 | US4161620 Electric arc furnace for steel making, with no refractory bricks at the furnace wall |
| 07/10/1979 | US4160869 Continuous charging apparatus |
| 07/10/1979 | US4160868 Apparatus and method for melting ferrous pellets |
| 07/10/1979 | US4160867 Method and apparatus for melting machining chips |
| 07/03/1979 | US4160117 Arc furnace enclosure |
| 06/19/1979 | US4158743 Electric resistance furnace |
| 05/29/1979 | US4156590 Combustion in a melting furnace |
| 05/29/1979 | CA1055553A1 Extended arc furnace and process for melting particulate charge therein |
| 05/15/1979 | US4154975 Method and apparatus for supporting electric heating elements in a furnace insulated with ceramic fiber |
| 05/15/1979 | US4154571 Premix gas burner assembly |
| 05/08/1979 | US4153449 Non-graphitic carbon filter, processing metals and metal oxides to produce alloys |
| 04/03/1979 | CA1051961A1 Apparatus for feeding charge to an electric smelting furnace |
| 03/20/1979 | US4145562 Uniform electric conductivity |
| 03/20/1979 | CA1051075A1 Stoking device for rotatable furnace pot |
| 03/20/1979 | CA1051074A1 Rotatable furnace pot for smelting furnaces |
| 03/13/1979 | US4143865 Flash smelting furnace |
| 02/13/1979 | US4139722 Electric induction heating furnace |
| 01/30/1979 | US4137422 Airtight metal melting furnace |
| 01/09/1979 | US4133969 High frequency resistance melting furnace |
| 12/26/1978 | CA1044890A1 Preheating apparatus |
| 12/05/1978 | CA1043575A1 Method and device for melting metals |
| 11/28/1978 | CA1043403A1 Method of coating carbon electrodes |
| 11/14/1978 | CA1042494A1 Apparatus for movement of charge within an electric smelting furnace |
| 11/14/1978 | CA1042207A1 Metallurgical lance |
| 10/31/1978 | US4123045 Crucible for induction heating apparatus |
| 10/31/1978 | CA1041583A1 Electric arc furnaces and refractory shapes therefor |
| 10/24/1978 | US4122295 Furnace wall structure capable of tolerating high heat load for use in electric arc furnace |
| 10/17/1978 | CA1040692A1 Apparatus and method for increasing furnace life in an electric furnace for thermoplastic materials |