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6426969 |
Discharge screw for moving hearth
Discharge screw ( 6 ) for a moving hearth, and in particular for an annular rotary hearth ( 2 ) of a reheat furnace for the heat treatment of loose materials, comprising a cylinder ( 61 ) arranged...
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6178192 |
Raw material heating apparatus
A raw-material heating apparatus in which raw-material supplying pipes and exhaust pipes are disposed in a peripheral portion of a furnace cover, a heating space is formed by the furnace cover, a...
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6015963 |
Plasma arc furnace with improved replaceable electrodes
A plasma arc waste treatment furnace is equipped with a plasma arc torch having an electrode formed from a conductive refractory material. The refractory electrode can be operated at very high...
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6014402 |
Electric resistance melting furnace
The invention relates to an electric resistance melting furnace for vitrifiable compositions, such as glass, enamel or ceramics, with a rotatable melting tank (1) about the vertical axis and a...
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5883918 |
Oxy:fuel melting furnace
An oxy:fuel melting furnace (2) comprising a rotatable furnace body (4), a normally stationary non-rotatable furnace roof (6) for fitting on the furnace body (4), dynamic sealing means (8) for...
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5812586 |
Method and apparatus for removing a molten slag with a vacuum from a chamber
Slag from a pool of molten slag floating on molten metal in a plasma arc treatment chamber is removed by providing a slag container located inside the chamber which has a slag intake pipe extending...
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5802098 |
Melting vessel with fastening, mounting and tilting devices
A melting vessel plant, in which the melting vessel is a converter vessel, to which a vessel cover with a pipe connection for removing the flue gases is attached. Either an oxygen lance with an...
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5798496 |
Plasma-based waste disposal system
Method and apparatus for the disposal of waste including a rotary kiln comprising at least one, and preferably a plurality of plasma guns positioned within a chamber defined by the rotary kiln, and...
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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...
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5731564 |
Method of operating a centrifugal plasma arc furnace
A centrifugal plasma arc furnace is used to vitrify contaminated soils and other waste materials. An assessment of the characteristics of the waste is performed prior to introducing the waste into...
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5581574 |
Method and apparatus for conditioning and using furnace off-gases in a scrap preheating apparatus
A preheat system for a furnace comprising a preheat vessel on a rotating turret and a receiving chamber for conditioning furnace off-gases prior to use in preheating.
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5548611 |
Method for the melting, combustion or incineration of materials and apparatus therefor
A plasma arc melter which is equipped with at least two transferred arc plasma torches of opposite polarities is used to melt normal batch materials for producing glass, ceramics, refractories and...
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5421850 |
Method and apparatus for recovery of non-ferrous metals from dross
A method and apparatus for treating non-ferrous metal drosses in order to recover the free metal contained therein. The dross is heated by a plasma torch in a rotary furnace, preferably to a...
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5408494 |
Material melting and incinerating reactor with improved cooling and electrical conduction
A reactor for incinerating and melting materials such as waste and/or toxic materials has a containment housing inside of which an upright, open-ended drum is rotatably mounted. The drum is lined...
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5312471 |
Method and apparatus for the manufacture of large optical grade SiO.sub.2 glass preforms
The disclosed process involves the feeding of particulate SiO 2 into a rotating cylindrical furnace in which a gas plasma arc has been established, for melting the feed at a temperature of at...
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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...
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5235611 |
Stepped end rotary furnace
The invention is directed to improved centrifugal rotary electric furnaces which are used for the heating and or fusion of minerals, such as quartz, and other materials having a high melting point....
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5136609 |
Method of producing finely divided particles or powder, vapor or fine droplets, and apparatus therefor
A method of producing finely divided particles or powder, vapor or fine droplets comprises the steps of heating and melting the starting raw material in a vessel having opposed reflecting surfaces,...
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5104432 |
Process for fiberizing molten glass or refractory oxide materials
A process for the treatment of a continuous or perturbated stream of liquid material, which process consists essentially of passing the said stream of liquid material through a plasma arc coupling...
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5103458 |
Electric arc remelting
A process for casting an ingot of pre-alloyed metal from a consumable electrode. It includes the steps of: providing a consumable electrode corresponding to the desired metallurgical composition of...
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5028248 |
Method of melting materials and apparatus therefor
A method of melting materials at power densities in excess of 25 KW/ft 2 of area within the metal shell of a melting vessel which method consists essentially of continuously feeding the material...
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4912296 |
Rotatable plasma torch
An improved plasma torch having a rugged configuration, which is easier to start, and which eliminates the need for fragile and possibly metal contaminating insulators from the lower end of the...
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4864096 |
Transfer arc torch and reactor vessel
A transferred arc torch is comprised of a first electrode surrounded by a coil. A second electrode is positioned adjacent to the first electrode so as to provide a small gap therebetween for...
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4850572 |
Process intended to prevent deposition on the walls of metallurgical containers and metallurgical containers suitable for carrying out this process
A process intended to prevent the formation of metal deposits on the walls (1) of metallurgical containers in contact with the molten metal bath (12). An improved container for carrying out this...
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4443186 |
Solar heated rotary kiln
A solar heated rotary kiln utilized for decomposition of materials, such as zinc sulfate. The rotary kiln has an open end and is enclosed in a sealed container having a window positioned for...
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3937866 |
Process of striking an arc for a plasma beam inside an enclosure and a stick-electrode for carrying out the process
A striking process for a plasma beam at high temperature which includes an enclosure between two torches located at opposite sides of the enclosure and outside the enclosure, a stick-electrode...
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3830950 |
ROTARY FURNACES OF THE PLASMA-ARC HEATING TYPE
The furnace is provided at each end with a chamber placed opposite to the moving enclosure of the furnace and limited by a casing attached to the stationary enclosure. The chamber is made...
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3795752 |
ELECTRIC FURNACE
In an electric furnace having an electric contact there are provided inner and outer metallic members carrying electricity, the inner intended to act as an axle or hub for the outer, and one of...
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3403211 |
Methods and devices for heating substances
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3300561 |
Methods and devices for heating substances by means of radiant energy and plasma heat sources
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3286012 |
Apparatus for treating materials at high temperatures
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3821455 |
Title is not available
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