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| Number | Title | Issue Date |
| 5376767 | Plasma torch and an apparatus for producing fused silica using plasma arc electrodes An apparatus for producing fused silica includes at least one anodic plasma arc electrode and at least one cathodic plasma arc electrode adjustably arranged with respect to one another so that the plasma arcs formed thereby couple together to form a plasm... | 12/27/1994 |
| 5369241 | Plasma production of ultra-fine ceramic carbides An apparatus and method for the synthesis of ultra-free (submicron) ceramic carbides in a thermal plasma torch reactor using primarily silica, boron oxide, titanium dioxide or other oxides as metal sources and methane as a reductant. A plasma torch operat... | 11/29/1994 |
| 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 |
| 5245627 | Use of a radiating arc furnace for treating a dross containing a metal in order to recover this metal A process is disclosed, for treating dross containing a metal such as aluminum, in order to recover this metal, In this process, the dross to be treated is introduced into a rotary or oscillating furnace, in which it is heated to a temperature above the m... | 09/14/1993 |
| 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 |
| 4676940 | Plasma arc sintering of silicon carbide A process for the sintering of silicon carbide refractory or ceramic articles using plasma arc gases. In the process of the invention, a formed silicon carbide article is heated in a plasma fired furnace to a sintering temperature of between 2000° C.-250... | 06/30/1987 |
| 4670048 | Method for heating the reducing gas of a blast furnace by means of a plasma generator Method for heating the reducing gas of a blast furnace by means of a plasma generator. The reducing gas flows through a pipe into which issues the nozzle of the plasma generator. The pipe leads towards a tuyere of injection into the blast furnace, and the... | 06/02/1987 |
| 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 |
| 4102764 | High purity silicon production by arc heater reduction of silicon intermediates A process for converting silicon intermediates to high purity silicon by an arc heater characterized by the thermal reduction of one of several potential purified silicon intermediate compounds using an arc heater as the reduction energy source and using ... | 07/25/1978 |
| 4037043 | Extended arc furnace and process for melting particulate charge therein The furnace and process disclosed herein comprise an electric arc furnace having at least one electrode with an axial opening therein through which an appropriate gas is fed into the arc thereby permitting a stabilized extended arc to be produced. The axi... | 07/19/1977 |
| 4006284 | Extended arc furnace and process for melting particulate charge therein The furnace and process disclosed herein comprise an extended arc furnace having at least one electrode with an axial opening therein through which an appropriate gas, such as argon, may be fed into the extended arc, and a substantially vertical reaction ... | 02/01/1977 |
| 3982885 | Method and arrangement for inhomogeneous annealing of small parts An arrangement for providing controlled annealing of parts within a furnace comprising a series of heat radiation distributors, thermal conduction dosing devices and heat accumulators positioned within the furnace to provide a temperature gradient in the ... | 09/28/1976 |
