| Patents for F27B 3 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces (6,383) |
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| 09/12/1990 | EP0386586A2 Direct current arc furnace |
| 09/06/1990 | DE3906653A1 Melt-down unit with shaft-type charging-material preheater |
| 09/05/1990 | EP0385434A2 Smelting unit with a shaft for charging and preheating the charge |
| 09/05/1990 | CN2061678U Novel box-type electric resistance furnace with sealing furnace door |
| 09/03/1990 | WO1990010086A2 Melting aggregate with shaft for preheating charged materials |
| 08/29/1990 | CN1044983A Three-section terminal-outlet choke-type heating furnace with a short slide |
| 08/22/1990 | CN1044851A Electromagnetic dc arc furnace with dual u-shaped bottom electrodes |
| 08/21/1990 | US4951298 Closed remelting furnace having several horizontally movable furnace lower portions |
| 08/21/1990 | CA1273044A1 Arc heating type extra-furnace refining apparatus |
| 08/16/1990 | EP0382701A1 Device for preventing slag entrainment |
| 07/31/1990 | US4944670 Self-cleaning burner |
| 07/31/1990 | CA1272185A1 Furnace heating |
| 07/25/1990 | CN1008940B Bottom, particularly for direct current arc furnace |
| 07/24/1990 | CA1271977A1 Cold hearth melting configuration and method |
| 07/12/1990 | WO1990006481A3 Furnace for melting down scrap iron |
| 07/10/1990 | US4940486 Direct current, plasma, electron flow, refining, alloying |
| 07/10/1990 | US4940376 Scrap loader for molten metal furnace |
| 07/03/1990 | US4939033 Metallurgic containers |
| 07/03/1990 | US4938866 Conveyor residue removal apparatus |
| 07/03/1990 | US4938456 Metallurgical panel structure |
| 06/27/1990 | EP0375657A1 Melting furnace |
| 06/27/1990 | EP0256138B1 System for scrubbing gas used for preheating of scrap for steelmaking |
| 06/27/1990 | CN1008553B S-shape crossling kiln |
| 06/26/1990 | CA1270879A1 Anode system for plasma heating usable in a tundish |
| 06/21/1990 | DE3842203A1 Melting furnace, in particular arc furnace |
| 06/19/1990 | US4935054 Through a chute to mouth of furnace |
| 06/14/1990 | WO1990006481A2 Furnace for melting down scrap iron |
| 06/13/1990 | EP0372269A1 Process for the operation of a melting unit, and melting unit for performing this process |
| 06/12/1990 | US4932635 Cold hearth refining apparatus |
| 06/07/1990 | DE3840486A1 Ofenanlage zum einschmelzen von schrott Furnace to melt scrap of |
| 05/31/1990 | WO1990005886A1 A cooling panel |
| 05/30/1990 | CN1042600A Hearth comprising device for heat recuperation |
| 05/23/1990 | EP0369642A2 Method of melting materials |
| 05/23/1990 | CN2057506U Lime kiln outside furnace |
| 05/18/1990 | CA2003155A1 Method of operating a smelting unit and a smelting unit for that method |
| 05/16/1990 | EP0367906A1 Combination left and right handed furnace roof |
| 05/16/1990 | EP0190313B1 Method and apparatus for continuous steelmaking |
| 05/09/1990 | CN1042004A Combination left and right handed furnace roof |
| 05/08/1990 | US4923391 Regenerative burner |
| 05/02/1990 | CN2056741U Remote open magnetic seal door |
| 05/02/1990 | CN2056740U 加热炉 Furnace |
| 05/01/1990 | US4921521 Method and furnace for melting inorganic materials |
| 04/25/1990 | EP0364641A1 Treatment of metallurgical vessels |
| 04/25/1990 | CN2056500U Exhaust furnace cap |
| 04/19/1990 | DE3834795A1 Industrieofen Industrial furnace |
| 04/18/1990 | CN1041442A Heat exchange-type semi-gas kiln for glass mosaic |
| 04/17/1990 | US4918705 Furnace enclosure having a clear viewpath |
| 04/11/1990 | EP0362253A1 Process for treating liquid metals |
| 04/04/1990 | EP0361926A2 Melting and holding furnace |
| 03/14/1990 | EP0358115A2 Bipartite final brick |
| 03/13/1990 | CA1266653A1 Apparatus and method for the flow control of flue gas to combustion air in a regenerative heating system |
| 03/07/1990 | EP0357395A2 A silicon smelting process and a furnace therefor |
| 03/07/1990 | EP0267197B1 Melting and holding furnace |
| 03/07/1990 | CN2053953U Metal smelting furnace for continuous casting |
| 03/07/1990 | CN1040264A Refractory elements for construction of heat regenerators |
| 03/06/1990 | CA1266378A1 Plasma heated sintering furnace |
| 02/14/1990 | EP0354844A1 Refractory elements for making thermal regenerators |
| 02/14/1990 | CN2052881U Self-baking vacuum calciner |
| 02/13/1990 | US4900603 Refractory, heat insulating articles |
| 02/13/1990 | US4900249 Aluminum reverberatory furnace lining |
| 01/30/1990 | US4897852 Silicon smelting process |
| 01/25/1990 | WO1990000627A1 Cold hearth refining apparatus and method |
| 01/16/1990 | US4893895 An improved encased high temperature optical fiber |
| 01/10/1990 | CN2050959U Power saving quick founding furnace for aluminum |
| 01/10/1990 | CN2050958U High efficiency radiation infrared resistance furnace |
| 01/02/1990 | US4891008 High temperature convection furnace |
| 12/27/1989 | CN1038293A Dual-purpose reaction furnace for producing soft hard carbon black and corresponding process thereof |
| 12/21/1989 | DE3820448A1 Cooled wall element for metallurgical furnaces |
| 12/20/1989 | CN2049749U Automatic regulator for non-metallic arc furnace |
| 12/12/1989 | US4887277 Electric arc furnace |
| 12/12/1989 | CA1263883A1 Liquid cooled cover for electric arc furnace |
| 12/12/1989 | CA1263879A1 Circumferential sealing assembly |
| 12/07/1989 | DE3818794A1 Extraction device for furnace waste gases of a melting unit, in particular an arc furnace |
| 12/05/1989 | CA1263679A1 Wall electrode for direct current electric mettallurgical cell |
| 11/29/1989 | CN1037582A Panel adapted for coolant through flow and article incorporating such panels |
| 11/28/1989 | US4883258 Plasma furnace |
| 11/22/1989 | CN2048173U Continuous heating furnace without smoke |
| 11/21/1989 | US4881670 Automatic melt supplying method and holding furnace having automatic melt supplying system |
| 11/14/1989 | US4881239 Fault detection during remelt of electrodes into blocks |
| 11/08/1989 | EP0340226A1 A method of preheating scrap |
| 10/25/1989 | CN2046614U Baby d.c. electrometal furnace |
| 10/17/1989 | US4874311 Combustion products are pyrolyzed to produce luminous flame; temperature control |
| 10/04/1989 | EP0335434A1 Reheating, holding and accumulation furnace for steelworks products |
| 10/04/1989 | EP0335042A1 Improved cooling system and method for molten material handling vessels |
| 10/04/1989 | CN1036073A Improved cooling system and method for molten material handling vessels |
| 10/03/1989 | US4871148 Vortex inhibitor for molten metal discharge |
| 10/03/1989 | CA1262166A1 Hearth bottom, more particularly for dc arc furnaces |
| 10/03/1989 | CA1262090A1 Device for cutting an electrode casing |
| 10/03/1989 | CA1262044A1 Rotary calciner with stationary discharge scroll |
| 09/26/1989 | US4870655 Apparatus for recovery of metallics and non-metallics from spent catalysts |
| 09/26/1989 | CA1261147A1 Containers for molten metal |
| 09/26/1989 | CA1260049A1 Tiltable metallurgical furnace vessel |
| 09/20/1989 | CN2044709U Lateral tuyere apparatus for smelting in molten pool |
| 09/13/1989 | EP0331707A1 Vessels for containing molten metal |
| 09/12/1989 | US4866731 Electric furnace arrangement |
| 09/12/1989 | CA1259367A1 Electric connection device for wall mounting on a direct current metallurgical furnace |
| 09/08/1989 | WO1989008230A1 Furnace for making and delivering melts |
| 09/08/1989 | WO1989008153A1 Process for implementing reducing pyrometallurgical processes with pellets |
| 08/30/1989 | CN2043742U Electrode arm for electric arc furnace |
| 08/29/1989 | US4861001 Melting retort and method of melting materials |