| Patents for F27B 19 - Combinations of different kinds of furnaces that are not all covered by any single one of main groups (670) |
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| 06/30/1987 | US4676824 Process for generating heat and producing sponge iron |
| 06/30/1987 | CA1223509A1 Method of and a plant for preheating and, possibly, heat-treating and subsequently dividing rod-shaped material into slugs |
| 06/24/1987 | EP0226329A2 Calcination apparatus for use in a fluidized-bed installation for burning powdery materials |
| 04/09/1987 | WO1987002124A1 Melting and holding furnace |
| 04/08/1987 | CN86203076U Runner unit for oxygen-free copper casting |
| 11/26/1986 | CN86102037A Equipment for heating steel billet to the temperature of hot-forming |
| 11/12/1986 | CN85103688A Smelting furnace and its comprehensive utilization |
| 10/29/1986 | EP0199703A2 Plant for heating steel material up to the hot-forming temperature |
| 10/01/1986 | EP0196176A1 Energy conserving limestone calcining system |
| 09/30/1986 | US4614495 Apparatus for soaking steel pieces |
| 09/03/1986 | EP0192933A2 Process for heat treating, especially of metallic work pieces, and apparatus therefor |
| 07/08/1986 | CA1207143A1 Metal melting furnace |
| 05/28/1986 | EP0181858A1 Asphalt recycle plant |
| 04/08/1986 | US4581063 Method and apparatus for melting metal ingots |
| 03/26/1986 | EP0175430A2 Apparatus for soaking steel pieces |
| 03/25/1986 | US4578030 Method of and a plant for preheating and, possibly, heat-treating and subsequently dividing rod-shaped material into slugs |
| 02/12/1986 | EP0171097A1 Method of producing sponge iron |
| 01/15/1986 | EP0167895A1 Process and installation for the production of steel from scrap |
| 12/05/1985 | WO1985005439A1 Asphalt recycle plant |
| 12/03/1985 | US4556785 Apparatus for vapor sheathed baking of semiconductor wafers |
| 12/03/1985 | US4556420 Process for combination metal reduction and distillation |
| 11/13/1985 | EP0161099A2 Method and apparatus for melting metal ingots |
| 08/27/1985 | CA1192411A1 Copper refining plant |
| 07/09/1985 | US4527973 Precalciner for cement raw meal |
| 05/28/1985 | US4519814 Two stage batch liquefaction process and apparatus |
| 01/08/1985 | US4492587 Method of fusing vanadium pentoxide powder |
| 10/16/1984 | US4477250 Asphalt recycle plant and method |
| 07/03/1984 | US4457494 Metal melting furnace |
| 07/26/1983 | US4395024 Apparatus for hardening metallic workpieces including furnace and workpiece transport structure, a part of which can remain in the furnace during furnace operation |
| 02/15/1983 | US4373706 Apparatus for heat treatment of material to be worked on, especially of aluminum or magnesium alloys |
| 12/28/1982 | CA1138195A1 Method of and an apparatus for soaking steel pieces |
| 12/14/1982 | US4363653 Method and apparatus for melting solid pieces of metal |
| 06/29/1982 | US4337373 Furnace for fusing vanadium pentoxide powder |
| 01/19/1982 | US4311454 Method of soaking steel pieces |
| 04/21/1981 | CA1099508A1 Apparatus for melting and refining raw copper or blister copper |
| 01/27/1981 | US4247087 Furnace installation for the pyrometallurgical treatment of fine-grained ore concentrates |
| 01/20/1981 | CA1094138A1 Method and apparatus for melting machining chips |
| 01/13/1981 | CA1093293A1 Sintering nuclear fuel pellets |
| 12/23/1980 | US4240787 Drying oven with heat reclamation and air pollution control system |
| 09/30/1980 | CA1086498A1 Furnace installation for the pyrometallurgical treatment of fine-grain ore concentrates |
| 08/06/1980 | EP0014145A1 Method of fusing vanadium pentoxide powder, and furnace therefor |
| 07/29/1980 | US4214868 Method of and an apparatus for soaking steel pieces |
| 06/24/1980 | CA1079962A1 Method of sintering and apparatus for carrying out the method |
| 04/29/1980 | US4200265 Furnace for the melting and refining of copper |
| 09/25/1979 | US4168951 Method of sintering and apparatus for carrying out the method |
| 07/10/1979 | US4160867 Method and apparatus for melting machining chips |
| 06/19/1979 | US4158699 Electrothermal furnace |
| 06/19/1979 | US4158681 Chemical reduction of oxides having oxygen in stoichiometric excess of dioxides |
| 05/29/1979 | US4156452 Furnaces |
| 05/29/1979 | CA1055553A1 Extended arc furnace and process for melting particulate charge therein |
| 05/22/1979 | US4155705 Device for heat treatment of free-flowing materials |
| 03/27/1979 | CA1051202A1 Method for gaseous reduction of metal ores |
| 01/23/1979 | US4135704 Method and apparatus for heat treatment of material to be worked on, especially of aluminum alloys or magnesium alloys |
| 12/05/1978 | CA1043575A1 Method and device for melting metals |
| 10/03/1978 | CA1039500A1 Rotary kiln and hearth furnace |
| 05/09/1978 | US4088310 Apparatus for suspension smelting of finely-grained oxide and/or sulfide ores and concentrates |
| 01/10/1978 | US4067728 Method for gaseous reduction of metal ores |
| 11/01/1977 | US4056601 Process for the production of yellow phosphorus |
| 09/27/1977 | US4050889 Rotary oven |
| 06/07/1977 | US4027863 Suspension smelting furnace for finely-divided sulfide and/or oxidic ores or concentrates |
| 05/24/1977 | US4025296 Device for thermically treating granular and/or lumpy materials |
| 05/03/1977 | US4021192 Furnace system for and method of melting and preheating metal |
| 03/29/1977 | US4014443 Delivery device for heating furnaces |
| 03/08/1977 | US4010935 High efficiency aluminum scrap melter and process therefor |
| 02/01/1977 | US4006284 Extended arc furnace and process for melting particulate charge therein |
| 12/28/1976 | US4000071 Apparatus for separating phosphorus furnace slag and ferrophosphorus from one another |
| 11/16/1976 | US3991987 Rotary kiln and hearth furnace |
| 08/10/1976 | US3973763 System for melting metal |
| 04/27/1976 | US3953247 Method for heat treatment of material to be worked on, especially of aluminium or magnesium alloys |
| 01/27/1976 | US3935003 Process for melting metal |