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WO/1996/001033A1 |
An electric furnace for heating a metallic material contained in a crucible (120) which is positioned on a base (114). The electric furnace includes a sleeve (100), an electric heating element (106) disposed on the inner surface of the s...
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WO/1996/000489A1 |
A method and a furnace for melting a solid material to form an electrocast product, including at least two electrodes (4, 5). According to the method, the melting process is started by contacting the tops (13) of the electrodes (4, 5) wi...
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WO/1995/032025A1 |
Apparatus (10) and a method for vitrifying hazardous waste includes a melting vessel (12) into which hazardous waste is introduced for heating by a heater (38), and a metallic containment vessel (46) of the apparatus receives the melting...
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WO/1995/030778A1 |
A mass flow gravity feed furnace charger comprises a vertically-oriented elongated hollow conduit (51) which is associated with an apertured heat-resistant charge-well cover (30) adapted to lie essentially in contact with the upper surfa...
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WO/1995/029137A1 |
A process and apparatus carries out the direct removal of slag (7) floating on the molten metal (6) within a metallurgical furnace via vacuum suction-tube (8) which is inserted from above through a furnace discharge opening (5). The tube...
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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...
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WO/1995/026253A1 |
An ignitable material (26) is positioned in contact with a slag (8) contained in a plasma arc treatment system having an electrode (10) and an electrical ground (14). The slag is initially at a temperature below a conducting temperature ...
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WO/1995/023947A1 |
The invention relates to a charging device for closed arc furnaces with at least one electrode, especially for melting scrap. In order to be able to lay the charge in the furnace head in a predetermined quantity, time and location, accor...
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WO/1995/017528A1 |
In steel-making there are conflicting processing requirements at different stages of the process. The method and apparatus of the invention creates different processing conditions at different stages of the process. Molten ferrous materi...
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WO/1995/016796A1 |
A loading device for feeding liquid metal into an electric furnace with a trough (15). The device includes a shelf (19) extending from the side of the trough (15) of the furnace (10) and linked to the bottom of the furnace (10).
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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...
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WO/1995/016336A1 |
The invention pertains to a process and device for regulating the position of the tip of an electrode immersing in an electric furnace heated by electric arc or resistance heating. To measure with precision the position of the electrode ...
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WO/1995/010929A1 |
A bottom electrode for a metallurgical vessel driven with direct current consists of two parts made of different materials that may be interconnected. A coolant is applied on the part arranged outside of the bottom of the vessel and turn...
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WO/1995/009518A1 |
The invention relates to electric melting technique, and particularly to technique where energy is dissipated by Joule effect in the melt from downwardly immersed electrodes. A support (8) for an electrode (1) of this type comprises a po...
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WO/1995/009336A1 |
This invention is provided with a furnace body (1) having an electrode (3) and adapted to melt scrap with arc heat, an air blow port (20) from which air is blown into the furnace body (1) via an air control valve (19), a carbon blow rate...
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WO/1995/004250A1 |
A pushing machine is described, which is capable of running to opposite directions, upon remote control, along a length of rail provided in front of the mouth or slag hole of an electric furnace (10) for the smelting of iron products. It...
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WO/1995/000671A1 |
A method and apparatus for controlling slag in a trough of a tilting furnace or in a free-standing tilting vessel. The apparatus (10) has a reservoir (36) for receiving a flow of molten metal and slag. The reservoir has a slag opening (5...
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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...
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WO/1994/025814A1 |
A method for heating a mass (10) in a partial vacuum, said mass being placed in a closed heating chamber (3), and a first wall area of said heating chamber being connected (5) to a suction source (6). At a distance from said first wall a...
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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...
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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...
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WO/1994/024506A1 |
This apparatus is provided with a throat (38) which has at one end thereof a raw material inlet port (37) connected to a furnace body (2), and which extends in the diagonally upward direction, a heat exchanger (39) formed on the upper si...
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WO/1994/024060A1 |
A device for processing waste, particularly hospital waste, comprising a gasification chamber (1) into which waste is fed so that it can be degassed and burnt, a post-combustion chamber (2) for burning gas from the gasification chamber, ...
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WO/1994/022785A1 |
A high strength graphite material is fabricated into a sheet, the sheet is bent into a tube, and the tube is retained in that shape for use in a high temperature furnace. The retained tube is rigid and can replace prior art machined bloc...
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WO/1994/022279A1 |
An arc furnace (1) has an electrode (13) and connection members (14) for connection to a power-supply network (20) for supplying an arc (16) at the electrode with current. The furnace is provided with a voltage-pulse generating member (3...
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WO/1994/020791A1 |
A guiding flue (10) of refractory material is arranged at the exit of the slag exhaust hole (7) of a plasma fusion furnace (1) to guiding exhaust gas (5) in the downstream direction of the flowing slag. The slag which flows down by the s...
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WO/1994/019497A1 |
Method and apparatus for producing iron by melt reduction of concentrate or prereduced concentrate in a melt bath in a reactor, e.g. a converter (10). Concentrate and carbonaceous reducing agent are supplied to the melt bath consisting o...
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WO/1994/014983A1 |
A tilting device for a direct current arc furnace and a process are disclosed for completely emptying the furnace while the furnace is operated with continuous scrap supply through a lateral opening (15) in the furnace vessel (1) and rem...
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WO/1994/013840A1 |
A flow control device (20, 32, 52, 82) comprising a baffle plate (28, 46, 58, 88) and a plurality of dividers (30, 48, 56, 89) radially disposed about a nozzle (22, 34, 54, 84) through which liquid is to be discharged and adapted to spac...
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WO/1994/010348A1 |
A process and device are disclosed for melting scrap in a direct current-driven closed shaft furnace. The scrap is fed in a ring area at the furnace end, the hot gases which flow against the falling scrap are sucked below the scrap feedi...
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WO/1994/009332A1 |
In a scrap conveyor (2) for feeding a scrap to a processing furnace (1) such as an arc furnace, etc., while pre-heating the scrap by an exhaust gas from the processing furnace, the periphery of the scrap conveyor is covered with a gas se...
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WO/1994/003029A1 |
An incinerator (10) for the disposal of biohazardous waste has a sealed enclosure (12) defining a combustion chamber (18) with upper, first and second level intermediate, and lower portions (19, 20, 21, 22). The upper chamber portion (19...
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WO/1994/000400A1 |
The invention concerns a refractory ceramic compound for lining the floors of electric-arc furnaces, the compound consisting of a refractory matrix material containing a certain proportion of finely divided metallic iron.
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WO/1993/024665A1 |
A method is disclosed for melting copper without incorporating unwanted oxygen and/or hydrogen into the copper by effectively controlling the burners (16) used to melt the copper within desired fuel/air ratio operating limits by employin...
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WO/1993/020252A1 |
The invention concerns a method for the processing free-flowing materials, in particular filter dusts from the iron and steel industry and waste-incineration plants, as well as a device for carrying out the method. In order to ensure tha...
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WO/1993/017131A1 |
The invention relates to a process for desulphurising irons melts with minimal slag production, and a suitable device therefor. In the process, a slag with the chemical analysis (I) and impurities arising from the raw material is taken t...
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WO/1993/015860A1 |
A method and apparatus for controlling slag in a tilting furnace (12). The apparatus (24) is mounted on a trough (22) extending from the furnace tap hole and has a reservoir (36) for receiving the flow from the trough (22). The reservoir...
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WO/1993/013228A1 |
A process is disclosed for melting scrap, in particular from cars. The charge is introduced in pieces or batches by means of a charging tube (3) that extends through a closed lid (2). Electrodes (15) for heating the molten bath are excen...
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WO/1993/012261A1 |
In the particular embodiments described in the specification, a vacuum furnace includes a hearth (13) having a melting region (10) and a refining region (19) and a particulate metal supply tube (26) for conveying particulate metal (25) t...
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WO/1993/011398A1 |
A charger system for a furnace comprising a loading mechanism for loading scrap material into the furnace, the loading mechanism co-operating with the furnace to provide a substantially airtight arrangement whereby on opening of the furn...
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WO/1993/010413A1 |
A melt-in aggregate has a furnace vessel (11) mounted on a furnace cradle (13) and closable by a lid (12), as well as stick electrodes (28) that can be lifted and lowered into the furnace vessel (119) by means of electrode lifiting means...
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WO/1993/005626A1 |
In order to improve cooling and start conditions of a D.C. arc furnace, its hearth electrode is made of at least one metal rod that extends through the wall of the hearth and is cooled by at least one cooling channel that extends along t...
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WO/1993/004010A1 |
The invention concerns a furnace (1) with an inner wall (2), an outer wall (3) and, located between them, thermal insulation (4). The thermal insulation is foamed and cured in situ, from a preparation containing: for every 100 parts by w...
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WO/1992/022181A1 |
A process is disclosed for melting scrap metal. Threephase current is rectified to direct current by thyristors and is led through a cathode, through the material contained in a metallurgical vessel and through a bottom electrode designe...
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WO/1992/018268A1 |
Trap trench to catch molten metal and to drain cooling wear. The trap trench (1) has a drainage layer (5, 6) consisting of granulated slag in which the grains of the said slag are bonded together by a binder while retaining small channel...
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WO/1992/018818A1 |
An electric arc furnace or converter is provided with a taphole (2) and/or collector nozzle (10) which is provided, for at least a portion of its length, with an offset bore enlargement (13). The furnace may be a tilting electric arc fur...
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WO/1992/015531A1 |
A continuous melting furnace for oxide mixtures using direct high frequency induction and having very short refining times and low power consumption comprises an inlet (14) and an outlet duct (15) for continuous flow of oxides in a metal...
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WO/1992/013108A1 |
The sample taking reed (7) mounted in a pipe for evacuating smoke coming particularly from a fusion or heat treatment furnace, is comprised of an extraction tube (8) extended in a closed sleeve (9) having an inlet (11) and an outlet (12)...
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WO/1992/010594A1 |
Facility for producing steel by melting scrap comprises an electric furnace (2'), means for supplying individual batches of scrap for charging one at a time into the furnace, and a preheating chamber (4) for preheating each batch of scra...
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WO/1992/003896A1 |
An arc is drawn between a movable electrode (E) (preferably graphite), and a fixed electrode (7) in a furnace when smelting metal oxides using a plasma. Shielding gas, e.g. N, is introduced into plenum (P) about the movable electrode (E)...
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