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| Number | Title | Issue Date |
| 4185157 | Apparatus for collecting and removing smoke and fumes from a melting furnace plant An apparatus for removing smoke and fumes from a melting furnace including a stationary exhaust duct, an inverted funnel-shaped hood, and an extensible ducting stem pivotally interconnecting the hood and exhaust duct to accommodate shifting movement of th... | 01/22/1980 |
| 4160117 | Arc furnace enclosure An arc furnace enclosure has front, side and rear walls and a roof. A front opening in the enclosure allows a charging bucket to be moved into the enclosure and there is a roof opening for access to the furnace electrodes. A door assembly is movable into ... | 07/03/1979 |
| 4156102 | Method for producing ferro-alloys An improved method and apparatus for producing ferro-alloys from ore in which an ore is first mixed with a solid reducing agent, preheated and pre-reduced in a rotary kiln, and smelted in an electric furnace, in which the pre-reduced ore is heated by a bu... | 05/22/1979 |
| 4099019 | Electric furnace waste heat recovery method and apparatus Useful heat is recovered from electric furnaces using two heat recovery systems. Primary heat recovery is effected using liquid water or other cooling liquid and is performed in such a manner that the temperature of the liquid does not exceed its boiling ... | 07/04/1978 |
| 4088824 | Electric furnace station noise and smoke pollution control system A pollution control system for an electric furnace station which provides for noise abatement and the collection and discharge of pollutant gases during charging, refining and tapping stages of electric furnace operations. A housing surrounds the electric... | 05/09/1978 |
| 4081178 | Apparatus for collection of tapping gases from electric smelting furnaces Apparatus for collection of tapping gases to prevent worker exposure to them is disclosed. The apparatus comprises a plurality of screens in combination with an opening in the floor positioned so that tapping gases are removed by the smoke hood without th... | 03/28/1978 |
| 4080511 | Apparatus for the melt reduction of fine-grained iron oxide material For the melt reduction in a DC electric arc furnace of iron oxide material of such a fine grain size that it can be blown about by the action of an electric arc, a hearth for the iron melt used, is provided with an outer wall and a roof down through which... | 03/21/1978 |
| 4063028 | Suspended roof for electric arc furnace A dual ring liftable and swingable roof for an electric furnace is provided with an outer, hanger-suspended, refractory tile, apron-defining roof portion between its outer fluid-cooled ring and its upwardly positioned inner ring. A central part of the roo... | 12/13/1977 |
| 4005252 | Apparatus for gas collection in open electric smelting furnaces A gas collection apparatus for use in open electrical smelting furnaces is disclosed. The apparatus comprises an annular body about the outer circumference of the furnace and sealed to the top edge of the furnace on one side thereof with a sloped wall ext... | 01/25/1977 |
| 3999001 | Arc furnace fumes control system An exhaust system for use with an electric arc melting furnace having a crucible and an upwardly directed mouth covered by a roof, and a device coupled to the roof for projecting it upwardly along an axis and pivotally about the axis to a position out of ... | 12/21/1976 |
| 3997711 | Reduction furnace control The invention covers methods and apparatus for controlled flue gas combustion during operation of a closed electric arc reduction furnace to produce metals and metal alloys while feeding a burden to the furnace chamber. The furnace chamber is closed by me... | 12/14/1976 |
| 3985545 | Metal melting method using electric arc furnace An electric arc furnace of the closed type for melting metals, having three heating electrodes and equipped with raw material charging inlets and a tapping hole in the furnace body. The three electrodes are arranged in a substantially straight line, and t... | 10/12/1976 |
| 3979551 | Arc furnace fumes control system For use with an electric arc melting furnace having a crucible and an upwardly directed mouth covered by a roof, and a device coupled to the roof for projecting it upwardly along an axis and pivotally about the axis to a position out of registry with the ... | 09/07/1976 |
| 3956611 | High pressure radiant energy image furnace A high pressure radiant energy image furnace includes a radiant heat source, such as a Xenon short arc lamp or a halogen incandescent lamp, and an optical system for concentrating the radiant energy from the source on a sample enclosed in a thin wall tran... | 05/11/1976 |
| 3938788 | Apparatus for the production of metals by a smelting metallurgical process An improvement in an apparatus for the production or refinement of metals comprising a furnace and a hood disposed thereover, which improvement comprises an upper chamber surrounding the sides and the top of said furnace, said upper chamber having at leas... | 02/17/1976 |
| 3930641 | Furnace hood structure In a combination of a furnace which is provided with an upwardly opening mouth, a lid for the mouth, a hood associated with the furnace and enclosing the mouth, the hood having a ceiling disposed above the uppermost position of the lid and the ceiling bei... | 01/06/1976 |
