| Patents for F27B 3 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces (6,383) |
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| 05/19/1992 | US5115447 Arc furnace electrode control |
| 05/19/1992 | US5115184 Cooling system for furnace roof having a removable delta |
| 05/19/1992 | US5114890 Zirconium-containing coating composition |
| 05/19/1992 | CA1300898C Melting furnace and method for melting metal |
| 05/12/1992 | US5112387 Producing stainless steels in electric arc furnaces without secondary processing |
| 05/07/1992 | DE4034809A1 Arc furnace lance robot used to manipulate e.g. carbon@ powder - has swing arms on rotating tower with motors to move the lances at required height and angle into the furnace |
| 05/06/1992 | EP0483322A1 Smelting plant with two adjacent smelting furnaces. |
| 05/06/1992 | CN2103782U Pipe type vaporation and cooling skewback girder of back wall for open-hearth furnace |
| 04/23/1992 | CA2028212A1 Flicker compensating apparatus for dc arc furnace |
| 04/22/1992 | EP0480944A1 Process and device for heating a metallurgical furnace |
| 04/22/1992 | CN1060523A Tilter for electric furnace body |
| 04/15/1992 | CN2101839U Anode with forced cooling ac (electric) arc furnace bottom |
| 04/08/1992 | EP0479757A1 Process and apparatus for the manufacture of titanium-(aluminum) base alloys |
| 04/01/1992 | CN2100592U Electrode hole brick |
| 03/31/1992 | US5100463 Method of operating an electron beam furnace |
| 03/25/1992 | CN2099946U Constant temp. delay automatic control box type high temp. electric stove |
| 03/18/1992 | EP0474883A1 Dc electric furnace for melting metal |
| 03/18/1992 | EP0474682A1 Closed remelting furnace with a plurality of horizontally mobile bottom elements |
| 03/18/1992 | CN1059594A Dc electric arc furnace |
| 03/11/1992 | EP0473809A1 Direct-current arc furnace |
| 03/05/1992 | WO1992003240A1 Device for tapping vehicle for metal melts |
| 03/04/1992 | EP0472721A1 Direct current electric furnace. |
| 03/04/1992 | CA2049853A1 Direct-current arc furnace |
| 02/27/1992 | DE4026897A1 Metallurgical vessel for electric arc furnace - has two=part electrode in base with connections for current and cooling water |
| 02/26/1992 | EP0472254A2 Metallurgical vessel with metal electrode |
| 02/23/1992 | WO1992003896A1 Treatment of oxide-containing dusts |
| 02/23/1992 | CA2089755A1 Treatment of oxide-containing dusts |
| 02/19/1992 | EP0471427A2 Installation for charging of melting furnaces |
| 02/19/1992 | CN1058808A Silver copper-smelting method double-chamber furnace mould |
| 02/13/1992 | DE4025249A1 Steel scrap DC arc furnace - has oval crucible with offset cathode, copper lined walls and enclosed feed chute |
| 02/13/1992 | DE4025084A1 DC arc furnace with air-cooled electrodes - has steel plate bottom housing forming anode connection via several conductor attachments |
| 02/12/1992 | EP0470223A1 Metallurgical unit |
| 02/06/1992 | WO1992001820A1 A method for operating electron beam furnace and intermediate pressure electron beam furnace |
| 02/06/1992 | WO1992001818A1 Vacuum processing of reactive metal |
| 02/04/1992 | USRE33814 Manifold inputs and outputs for furnace regenerators |
| 01/29/1992 | EP0468950A2 Plant for producing molten metals |
| 01/29/1992 | EP0468832A1 Furnace for holding the temperature and for metallurgical treatment |
| 01/28/1992 | US5084090 Vacuum processing of reactive metal |
| 01/23/1992 | DE4022720A1 Untergefaess eines gleichstromlichtbogenofens Untergefaess a DC arc furnace |
| 01/22/1992 | EP0268606B1 Method and device for pre-heating waste metal for furnaces |
| 01/22/1992 | CN2094015U Multi-purpose metallurgical plasma arc furnace |
| 01/22/1992 | CN1058048A Method and apparatus for feeding iron-bearing materials to metallurgical furnaces |
| 01/20/1992 | CA2044529A1 Vacuum processing of reactive metal |
| 01/18/1992 | WO1992002112A1 D.c arc furnace |
| 01/14/1992 | US5081640 Method of controlling a temperature of a molten metal |
| 01/14/1992 | CA2046777A1 Oven with temperature holding for metallurgical treatment |
| 01/08/1992 | CN2092728U Small-sized multifunction smelting furnace |
| 01/07/1992 | WO1992001074A1 Reclamation of metal from scrap |
| 01/07/1992 | US5078368 Gas fired melting furnace |
| 01/07/1992 | CA2086253A1 Reclamation of metal from scrap |
| 12/27/1991 | EP0462898A1 Process and installation for smelting of a charge in a furnace |
| 12/27/1991 | EP0462713A1 Method and apparatus for feeding iron-bearing materials to metallurgical furnaces |
| 12/18/1991 | CN2090955U Transistor high-frequency high-voltage pulse spark furnace |
| 12/11/1991 | EP0460632A1 Gas- and dusthood for an electric arc furnace and process for its utilisation |
| 12/04/1991 | EP0459864A1 Furnace for reheating metallurgical products |
| 12/03/1991 | US5069429 Plant for treating and melting metals, metal compounds and/or metal alloys or for producing calcium carbide |
| 11/27/1991 | CN1056568A Dc electric-arc furnace |
| 11/27/1991 | CN1056567A Smelting plant with two melting furnaces arranged in juxtaposed relationship |
| 11/27/1991 | CN1014900B Dual-purpose reaction furnace for producing soft/hard carbon black and corresponding process thereof |
| 11/19/1991 | US5066350 Protecting Pipes Used In Molten Metals |
| 11/19/1991 | US5066326 Melting Of Solid Ferrous Metal Scrap |
| 11/18/1991 | WO1991018120A1 Smelting plant with two adjacent smelting furnaces |
| 11/13/1991 | EP0456085A1 Direct current arc furnace |
| 11/10/1991 | CA2040494A1 Direct-current arc furnace |
| 11/06/1991 | CN2088223U Fluidizing roaster |
| 11/06/1991 | CN2088222U Integral lifting furnace |
| 10/29/1991 | US5060915 Two-piece terminal brick |
| 10/23/1991 | EP0452599A2 Arc furnace with consumable electrode |
| 10/23/1991 | CN2087321U Infra-erdresistance furnace |
| 10/22/1991 | US5058534 Pipe wall of hot reaction chambers |
| 10/17/1991 | WO1991015727A1 Method and apparatus for controlling the raw material supply to an electrical melting furnace |
| 10/16/1991 | EP0451323A2 Method for preheating scrap iron by pyrolysis of resinous residues contained therein, with total recovery of their energy content and improvement of the steelmaking cycle |
| 10/16/1991 | CN2086747U Electric furnace for heat treatment |
| 10/15/1991 | US5058126 Silicon carbide beam as refractory in an open-arc furnace |
| 10/10/1991 | CA2023414A1 Method of and apparatus for preheating and removing organic materials from scrap iron |
| 10/09/1991 | CN1014268B Annealing furnace |
| 10/03/1991 | WO1991014912A1 Direct current electric furnace |
| 10/03/1991 | CA2057882A1 Direct current electric furnace |
| 10/02/1991 | EP0449258A2 Furnace bottom structure of direct current electric furnace |
| 10/02/1991 | EP0448724A1 Melting apparatus of cutting scrap |
| 10/02/1991 | DE4010353A1 Operating metallurgical furnace with self-baking electrode - lockable traction rod within electrode |
| 10/02/1991 | CN2085941U Horizontal roasting kiln |
| 10/01/1991 | US5054033 Tiltable arc furnace |
| 09/26/1991 | DE4009291A1 Tapping system for metallurgical vessel - has tubular element joining the vessel bottom to reception container top to facilitate tilting |
| 09/24/1991 | US5051127 Process for post combustion |
| 09/24/1991 | US5050848 Apparatus for post combustion |
| 09/20/1991 | WO1991014911A1 Dc electric furnace for melting metal |
| 09/17/1991 | US5050185 Process and apparatus for measuring the instability of an arc in an electrical arc furnace for processing liquid metal |
| 09/17/1991 | CA1288942C Apparatus for holding and refining of molten aluminum |
| 09/12/1991 | DE4006830A1 Mobile air shield for electric melting furnace - has steel structure with refractory lining and space inside for electrodes |
| 09/03/1991 | US5046145 Improved arc reactor with advanceable electrode |
| 08/29/1991 | WO1991013305A1 Metallurgical unit |
| 08/29/1991 | DE4006281A1 Metallurgisches aggregat Metallurgical aggregate |
| 08/29/1991 | CA2053912A1 Metallurgical unit |
| 08/27/1991 | US5042399 Hearth arrangement for melting furnace |
| 08/14/1991 | EP0441733A1 Metallurgical vessel with at least one electrode passing through the bottom wall |
| 08/14/1991 | CN2082843U Electrode current controlling device of arc furnace |
| 08/10/1991 | CA2035723A1 Plant for treating and melting metals, metal compounds and/or metal alloys or for producing calcium carbide |
| 08/08/1991 | WO1991011658A1 Destroying waste using plasma |
| 08/07/1991 | CN1013458B Electromagnetic dc arc furnace with dual u-shaped bottom electrodes |