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Matches 501 - 550 out of 8,766

Document Document Title
WO/1998/045654A1
A process for the preparation of ceramic articles having a thickness of at least about 2.5 cm, which comprises: a) selecting the ceramic composition from the group consisting of silicate material, metal oxides, nitrides and carbides, and...  
WO/1998/042164A1
The invention relates to a method for regulating or controlling a fusion process in a three-phase current arc furnace with at least three individual electrodes, which are independent of one another and have an adjustable height. At least...  
WO/1998/039610A1
A vertically oriented thermal processor (10) for processing batches of semiconductor wafers (14) held within a processing chamber (16). The processing chamber is contained within a processing vessel (18 and 168). A furnace liner (82) sur...  
WO/1998/028660A1
A description is given of a furnace (1) for Rapid Thermal Processing of a wafer (7), in which furnace the wafer (7) is heated by lamps (9), and the heat radiation is reflected by an optical switching device (15, 17) which is in the refle...  
WO/1998/026245A1
An arc furnace which includes a shell with a hearth, a roof for the shell, the roof including a plurality of segments (10, 11) which are substantially electrically isolated from each other and from the shell, an electrode (12) and a refr...  
WO/1998/019500A1
An electric furnace assembly is disclosed. The assembly comprises an elongated metallic resistor element (4) which is supported adjacent to a furnace wall (1). The resistor element is bent back and forth in its longitudinal direction and...  
WO/1998/009481A1
A novel apparatus for providing three-dimensional positioning to the ends of a translating element which is normally restricted to translation along the element axis. A cartridge assembly formed from a cylindrically shaped ceramic holds ...  
WO/1998/005185A1
An insulating material melting furnace including a cooled crucible (10) with a continuous metal side wall, a sectored cooled floor (12), and at least one field magnet (28) arranged under the floor and forming the only heating means. The ...  
WO/1997/049266A1
Slag from a pool of molten slag (34) floating on molten metal in a plasma arc treatment chamber (36) is removed by providing a slag container (38) located inside the chamber which has a slag intake pipe (40) extending from a bottom of th...  
WO/1997/028409A1
An electric furnace comprising a heating element formed of lanthanum chromite based hollow ceramics and opened at both ends thereof and having such terminal portions that a cross-sectional area of the ceramics at surfaces of both ends th...  
WO/1997/026219A1
Apparatus suitable for vitrifying nuclear waste comprises a tunable microwave cavity (10) connected by a first wave guide (16) to a source of microwave energy (18); cooling coils (12) for cooling the exterior of the cavity; a hopper (14)...  
WO/1997/017583A1
Power control of the heating process in a three-phase connected electric furnace by dividing the process into intervals and controlling the average power during these intervals. The power generation in a respective phase is separately co...  
WO/1997/005438A2
The invention concerns an arc furnace, in particular a d.c. arc furnace, comprising a vessel and a cover which lies thereon and has an opening for at least one electrode provided with a movement unit for vertical displacement. According ...  
WO1996024441A3  
WO/1996/024441A2
The present invention provides a relatively compact self-powered, tunable waste conversion system and apparatus which has the advantage of highly robust operation which provides complete or substantially complete conversion of a wide ran...  
WO/1996/008210A1
The invention concerns an arc melting and casting device (10) having a housing which comprises a melting chamber (14) and a casting chamber (16). The melting chamber (14) is disposed above the casting chamber (16) and is connected theret...  
WO/1996/000877A1
An electric arc furnace for melting scrap iron is to be of the simplest possible design while preventing thermal loads on the side walls caused by the electrodes and damage to the electrodes during charging. The electric arc furnace is d...  
WO/1995/027084A1
The invention relates to a base electrode of a d.c.-heated metallurgical vessel, especially for making a ferrous alloy, having a metal jacket coated with fireproof material. In order to ensure the widest possible electric contact and thu...  
WO/1995/017981A1
A method and a d.c. arc furnace for thermal treatment of an ash, wherein reducing conditions are established within a closed and sealed furnace, the ash is supplied via a channel (21) arranged in an electrode and fed from the open free e...  
WO/1995/016335A1
A submerged arc furnace with an open slag bath, in particular for melting powdery or fine grained batches, has a vertically movable frame arranged above the furnace closed by a cover. An electrode mount and an electrode filling device ar...  
WO/1995/013402A1
A ladle comprising one or more compartments for continuously processing molten metal, e.g. aluminium or alloys thereof, by means of a gas feeding and immersion heating device. Said ladle comprises a plurality of small diameter, high unit...  
WO/1995/006399A1
The invention relates to a heating element (1) for a Deglor furnace (10), where the heating rod (3) is surrounded by a protective pipe (2). The protective pipe (2) is secured with a flange (4) which is formed by a separate ceramic ring o...  
WO/1994/026938A1
The object of the invention is a direct current electric furnace for melting a ferrous raw material such as scrap iron, comprising a vessel (1) closed by a removable cover (13), at least one consumable electrode (5) passing through at le...  
WO/1994/024503A1
This invention is provided with a furnace body (2) having a bottom electrode (1) at a lower portion thereof, a furnace cover (3) provided so as to close an upper portion of the furnace body (2), a raw material inlet port (25) formed in t...  
WO/1994/024504A1
A cover (3) for a furnace body (2) is connected to each of two upper electrodes (16, 17) which extend through the portions of the furnace cover (3) which are spaced horizontally from each other by a predetermined distance. The upper elec...  
WO/1994/017353A1
A rapid thermal process (RTP) reactor (200, 220) processes a plurality of wafers (210) or a single large wafer (250) using either a single (204) or dual (204, 224) heat source. The wafers (210) or wafer (250) are mounted on a rotatable s...  
WO/1994/007101A1
A radiant heating furnace comprising a housing which is split into at least two parts which are movably mounted so that they can be brought together to enclose a specimen to be heated, each part including at least one substantially linea...  
WO/1993/012380A1
An apparatus, and method of operating the apparatus, wherein a feed material is converted into a glassified condition for subsequent use or disposal. The apparatus is particularly useful for disposal of hazardous or noxious waste materia...  
WO/1993/001461A1
The present invention presents a process and equipment to improve the operational and productive conditions for an electric arc furnace with a plasma thermal arc with longer and more stable arc using the controlled injection of inert gas...  
WO/1992/007224A1
An apparatus (10) is disclosed for heat treating a product. The apparatus includes a plurality of lamp assemblies (34). Each of the assemblies (34) has an infrared lamp (44) disposed within a quartz conduit (46). The quartz conduit is fo...  
WO/1992/002112A1
The floor (22) forming the anode of the d.c. arc furnace proposed comprises a copper-plated steel sheet (221, 222) with a brick lining (42, 43, 44) made of electrically conductive refractory material. This gives the greatest possible con...  
WO/1991/014912A1
The object of the invention is a directcurrent electric furnace for melting raw material, especially scrap metal. According to the invention, a d.c. electric furnace is constructed comprising two consumable electrodes (21, 22) separated ...  
WO/1991/012477A1
The furnace (70) includes a heating element (72) which is restrained from growth during operation of the furnace (70) by retaining spacers (84) which provide a yoke (88) around the individual coils (102) of the heating element (72) and w...  
WO/1991/000487A1
The melting unit, according to the invention, comprises a melting crucible located in a protective ceramic jacket (5) surrounded by a water-cooled inductor. The melting crucible consists of sleeves (1, 2) mounted coaxially and facing eac...  
WO/1990/014741A1
A plant for conductive electrical heating of elongated electrically conductive objects, e.g. steel blanks for further treatment in a roll mill. Said plant comprises a combination of the following features: at least two blanks (1) are pro...  
WO/1990/012266A1
An electrically heated vacuum furnace has a plurality of heating elements (13) distributed in an array extending within the furnace. This allows accurate control of the application of radiant heat energy from the elements (13) of the arr...  
WO1990010086A3  
WO/1990/010086A2
In a melting aggregate comprising an arc furnace (1) and a preheating shaft (2) for charging materials which is arranged beside the furnace, the outer walls of the preheating shaft are formed, in the lower part, by the wall (5) of the ve...  
WO/1990/003095A1
An electric arc generating device including, a first electrode (1) and at least two further electrodes (2, 3, 4). A source of electrical power (11) is connectable to said electrodes so as to cause an arc to burn between the first electro...  
WO/1989/011774A1
A process is disclosed for melting metallic materials in an arc furnace driven by direct current and having a pot-like vessel composed of a metallic envelope and of a fireproof lining, a negative electrode that extends into the vessel an...  
WO/1989/002211A1
The holder comprises a casing (2) and intermediate unit (3) consisting of a steel element (6), a copper element (9) and a steel element (12) joined together so as to form non-detachable bimetallic connections (10, 11), and of a partition...  
WO/1988/007315A1
Referring to Figs. 2, 3 and 4, reference numeral (10) refers to a graphite electrode among three graphite electrodes that correspond to a three-phase AC power source. A graphite electrode is connected to each of the graphite electrodes (...  
WO/1988/000426A1
An induction plasma furnace comprises an inductor (1) housing a melting pot (2) the side wall of which consists of two vertically oriented sections (3) made of an electrically conductive material and electrically insulated from each othe...  
WO/1987/007467A1
An induction plasma installation comprising a container (1) for melting the charge mounted in an inductor (2) connected to a capacitor battery (3) and to an alternating current source (4). At least one plasmatron (6) is connected in para...  
WO/1987/006685A1
A movable graphitizing furnace to graphitize several columns of electrodes at the same time in two side by side tanks, said furnace having a metallic cage construction and a covering of firebricks arranged at sight on said cage construct...  
WO/1987/004100A1
A method for heating primarily a so-called nozzle (2) through which a hot medium (10) in a liquid phase or in a liquid phase like condition, such as a molten metal, e.g. molten steel, is intended to pass in conjunction with a casting or ...  
WO/1987/003772A1
A device for controlling the gap between a melt electrode (62) and the surface of the molten mass (61) in a vacuum arc furnace. The device is based on the fact that the short-circuits generated between the melt electrode (62) and the sur...  
WO/1987/002049A1
The method according to the invention comprises the introduction of a first part of the fraction of recycled head gases at the base of the lower portion (23) of the furnace to provide for a primary cooling of the coke, and the introducti...  
WO/1986/003282A1
Apparatus for the simultaneous smelting and refining of metal ores comprises a chamber (1) having parabolic-shaped internal top and bottom walls and a carbon electrode extending transversely across the chamber (1). Optionally the electro...  
WO/1985/005438A1
Oven for firing (1) on a plastification chain articles (A) rotated on a suspended conveyor (7, 8, 9). The oven (1) of which the heating chambers form a narrow channel (4) comprising three distinct sections corresponding to three heating ...  

Matches 501 - 550 out of 8,766