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| Number | Title | Issue Date |
| 5960026 | Organic waste disposal system Organic waste material is pneumatically transported within air and mixed rewith by swirling flow through an annular injector passage of varying radial width into a reaction flow passage of an eductor nozzle section receiving the output plume of a plasma ... | 09/28/1999 |
| 5956365 | Electric arc furnace having slag door and post combustion process An electric arc furnace comprises a closed melting vessel and includes a roof through which metal to be molten is charged into the melting vessel. At least one electrode extends into the melting vessel and generates an electric arc and forms a molten meta... | 09/21/1999 |
| 5734673 | Waste-melting furnace and waste-melting method A waste-melting furnace includes a furnace body, a rotary heat-resistive vessel which is arranged inside the furnace body and into which waste is to be fed, and a transferred arc type torch plasma gun and a water-cooled electrode arranged above the rotary... | 03/31/1998 |
| 5270016 | Apparatus for the thermal conversion of methane Apparatus suitable for the thermal conversion of methane to hydrocarbons of higher molecular weight, comprising an elongated reactor 1 provided with an inlet 5 for supplying a gas mixture containing methane (process gas) and an outlet at the opposite end,... | 12/14/1993 |
| 5206879 | Destruction process Chemical waste is burned in oxygen using an electric plasma flame to heat a stream of gas which contains at least 70% by weight oxygen. Liquid waste in fine droplet form is introduced into the gas stream via a two-fluid atomizer using a carrier gas also p... | 04/27/1993 |
| 5157685 | Method and apparatus for preparing a melt for mineral fibre production A method of preparing a melt for mineral fibre production wherein a mixture of mineral fibre-forming raw materials is introduced into a shaft furnace and is heated to melting temperature by a plasma gas stream formed in a plasma torch and wherein waste ma... | 10/20/1992 |
| 5132984 | Segmented electric furnace An electric furnace comprising a container having electrically isolated wall segments useful for melting materials, particlularly ceramics, is disclosed. The electric fornace's side walls are constructed from electrically isolated segments, which cause el... | 07/21/1992 |
| 5107517 | Melting furnace A furnace for producing a melt for mineral wool production includes a shaft for preheating and melting of the raw material. A water-cooled grate is disposed in the bottom portion of the shaft, which supports a bed of ceramic filling bodies as well as the ... | 04/21/1992 |
| 5090340 | Plasma disintegration for waste material Apparatus and method for the disintegration of waste by subjecting the waste within a closed chamber to plumes of an electrically generated high temperature plasma. The chamber is lined with an array of nozzles to produce the plumes and the nozzles are su... | 02/25/1992 |
| 5046144 | Method and furnace for the preparation of a melt for mineral wool production In a method for the preparation of a melt for the production of mineral wool a raw material is introduced at the top of a shaft furnace and heated to melting temperature partly with a hot gas formed by plasma heating and partly with a hot gas formed by co... | 09/03/1991 |
| 4972063 | Device for mounting and withdrawing a plasma torch relative to an apparatus operating under pressure and temperature precluding a direct intervention The device for mounting and withdrawing a plasma torch in an apparatus at high pressure and temperature comprises in combination: at least one circular sealing element (2) interposed between the inner surface of a sleeve (3) and a nose (12) of the torch (... | 11/20/1990 |
| 4804395 | Electrode arrangement for lensing method A system is provided for positioning a pair of electrodes on either side of the end portion of an optical fiber extending through a contact, to establish an arc through a cross-aperture in the contact and across the fiber to melt the fiber into a lens, wh... | 02/14/1989 |
| 4761793 | Plasma fired feed nozzle A plasma feed nozzle 3 for a furnace 1 which has a tubular mixing chamber 7 open at one end to the furnace, a plasma torch 13 which provides superheated gases axially to the central portion of the mixing chamber 7, shroud gases which enter the end of the ... | 08/02/1988 |
| 4755203 | Optic fiber positioning for lensing method A system is described for forming a lens at the end of an optical fiber which extends through a hole in a contact, so the tip of the lens lies at a desired lens position located a predetermined distance rearward of the tip of the contact. The fiber is fix... | 07/05/1988 |
| 4743283 | Alternating current arc for lensing system and method of using same A system is provided for forming an end of an optical fiber into a lens, which produces a lensed fiber having an especially smooth lens surface and high strength near the intersection of the lens and the rest of the fiber. A lens is formed by establishing... | 05/10/1988 |
| 4718477 | Apparatus and method for processing reactive metals An apparatus and method is disclosed which is adapted to consolidate and melt reactive metallic materials, and to produce a "first ingot" which is suitable for subsequent evaluation and qualification under existing specifications for such materials in the... | 01/12/1988 |
| 4707583 | Plasma heated sintering furnace A furnace for the sintering of refractory or ceramic materials using plasma heated gases. The furnace comprises a sintering chamber with strategic positioning of the plasma torch inlets and exhaust outlet, a furnace temperature controlling device during s... | 11/17/1987 |
| 4654076 | Apparatus and method for treating metallic fines As apparatus and method is disclosed which is adapted to melt metallic fines, and which is useful for processing metallic fines into a useful form. The apparatus may also be used in the smelting of metallic oxides, and in combining metals in an alloying p... | 03/31/1987 |
| 4638489 | Method and means for use in the installation of plasma generators in shaft furnaces The invention relates to a method and a means for facilitating the replacement of plasma generators and for minimizing the heat losses during installation of a plasma generator in a shaft furnace, particularly for plasma generators of the type comprising ... | 01/20/1987 |
| 4626654 | Metallurgical plasma melting process A metallurgical plasma melting process wherein a plasma burner and a separate start-up burner disposed alongside same in the same port have their axes intersecting in the furnace at an acute angle. Only the start-up burner is operated initially to form a ... | 12/02/1986 |
| 4611332 | Transferred electric arc In a method for supplying thermal energy by means of a plasma arc heater to a reactor filled with solid, lump reduction material, the thermal energy is supplied via an outer or transferred arc, one electrode of which is formed by the heater and the other ... | 09/09/1986 |
| 4606038 | Plant for producing calcium carbide A burden of either or both CaO or CaCO3 and coal is melted and reduced by a plasma torch established between a plasma burner penetrating the upper structure of a furnace and an electrode in the bottom of the furnace to produce CaC2. ... | 08/12/1986 |
| 4546483 | Plasma melting furnace arrangement There is disclosed a plasma melting furnace through the side wall of whose cylindrical furnace body a plurality of downwardly directed plasma burners are guided, whose mouths project into the furnace interior. In order to avoid several rechargings, which ... | 10/08/1985 |
| 4530101 | Electric arc fired cupola for remelting of metal chips A melting furnace or cupola utilizing electric arc heaters to provide an arc-heated air stream to melt loose metal chips as well as larger pieces of metal scrap. In one embodiment, the arc-heated gas stream and metal chips are directed into a melting segm... | 07/16/1985 |
| 4508040 | Method and plant for conversion of waste material to stable final products The invention relates to a method and plant for converting waste material containing and/or comprising thermally disintegratable chemical substances to stable final products such as CO2, H2 O and HCl, the waste material being subject... | 04/02/1985 |
| 4425659 | Metal oxide reduction furnace A metal oxide reduction furnace has a shaft holding a verticle column of coke. An electric arc on the side of the lower portion of the column burns a cavity in the coke column and the arc is surrounded by the side wall and inner closed end of the cavity s... | 01/10/1984 |
| 4418414 | Metallurgical plasma melting furnace A metallurgical plasma melting furnace for the melting of metals and alloys is provided with a substantially cylindrical melting vessel and a plurality of plasma burners disposed in burner openings in the walls of the vessel for creating flow stable plasm... | 11/29/1983 |
| 4396421 | Method of, and arrangement for, producing molten pig iron or steel pre-material In a method of, and arrangement for, producing molten pig iron or steel pre-material iron-oxide-containing raw-material particles are top-charged into a fluidized bed formed of carbon particles and an oxygen-containing carrier gas. When passing the fluidi... | 08/02/1983 |
| 4363656 | Injection of hot gases into shaft furnace A tuyere for injecting hot reducing gases into a furnace is provided with an inlet pipe and a plasma oven whose gas outlet axis is inclined to the longitudinal axis of the tuyere. The angles which the outlet axis of the plasma oven and the inlet pipe form... | 12/14/1982 |
| 4362555 | Method and apparatus for manufacturing sponge iron Disclosed are a method and apparatus for manufacturing sponge iron by the continuous reduction of iron oxides in a shaft utilizing recirculation gases. Reaction gas is removed from the shaft furnace, substantially cleaned of all CO2 and H2... | 12/07/1982 |
| 4309170 | Vertical shaft furnace A vertical shaft furnace for continuously melting metal materials, such as scrap, copper cathode pieces and the like is disclosed. The furnace comprises an elongated cylindrical melting chamber having an opening in the upper portion thereof for intermitte... | 01/05/1982 |
| 4181504 | Method for the gasification of carbonaceous matter by plasma arc pyrolysis Apparatus and method for gasification of carbonaceous matter by plasma arc pyrolysis are disclosed. In one embodiment, a refractory-lined furnace is provided with a depression along its base for holding a pool of molten metal which acts as the external el... | 01/01/1980 |
| 4141694 | Apparatus for the gasification of carbonaceous matter by plasma arc pyrolysis An apparatus for gasification of carbonaceous matter by plasma arc pyrolysis is disclosed. In one embodiment, a refractory-lined furnace is provided with a depression along its base for holding a pool of molten metal which acts as the external electrode f... | 02/27/1979 |
| 4129742 | Plasma arc vertical shaft furnace A vertical shaft furnace for continuously melting metal materials, such as scrap, copper cathode pieces and the like is disclosed. The furnace comprises an elongated cylindrical melting chamber having an opening in the upper portion thereof for intermitte... | 12/12/1978 |
