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Patent Searching and Data


Matches 701 - 750 out of 9,958

Document Document Title
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...  
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/1994/022785A1
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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.  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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)...  
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...  
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)...  
WO/1992/003240A1
Device for use together with tapping vehicles for aluminium furnaces, magnesium furnaces, etc. The device comprises electrodes which are to be placed on the drainpipe of the vehicle in direct contact with the melt wich are sucked up, and...  
WO/1992/001818A1
In the particular embodiments described in the specification, a vacuum furnace includes a conveying arrangement for holding four solid metal members (16, 22) with their end faces (18) in closely-spaced relation and an energy beam gun (11...  
WO/1992/001820A1
In the representative embodiment described in the specification, an electron beam furnace (10) has an evacuation system (25) which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 mcirons H...  
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/1992/001074A1
The noxious fumes leaving the dry hearth chamber (112) of a metal recovery furnace (102) are fed to an incinerator (106) where they are burnt at high temperature with oxygen. The hot, clean exhaust gas is introduced to the bath chamber (...  
WO/1991/018120A1
A smelting plant is disclosed with two adjacent, alternatively operated smelting furnaces (1/1, 1/2). The furnace gases produced during smelting are introduced into the other smelting furnace in order to pre-heat its charge. A shaft (12/...  
WO/1991/015727A1
Method and apparatus for controlling the raw material supply to a continuously operated electrical melting furnace provided with electrodes (4) extending from above into the melt, a plurality of supply means (5) for the raw material as w...  
WO/1991/014911A1
A DC electric furnace for melting metal, which is capable of melting scrap quickly and reducing cold spots and hot spots developing on the furnace wall. The furnace is provided with an upper electrode, a plurality of furnace-bottom elect...  
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/1991/013305A1
In a metallurgical unit with a tiltable vessel (3) supported on a travelling supporting frame, the vessel is fastened in a frame (41) which is supported on the supporting frame (63) by a frame-lifting device (62). As a result, lifting an...  
WO/1991/011658A1
The invention is a furnace which separates metals from their ores in a one-step process involving a rare carbon plasma reducing atmosphere. A secondary use is the injection of water into this atmosphere which causes an explosive flame, s...  
WO/1991/010872A1
A collecting pit (1) for receiving molten metal and cooling water in the event of defects in devices for smelting or heating metal has a drainage made from granular bulk material (5), in particular slag granules, and perforated covering ...  
WO/1991/005883A1
This invention relates to a melting apparatus of cutting scrap for melting cutting scrap such as aluminum cutting scrap into the molten metal of a melting furnace of aluminum or the like. A hopper (10) whose opening (11) is kept above th...  
WO/1991/000366A1
Described is a process for heating a metallurgical furnace, in particular an arc furnace charged with scrap metal or a similar solid material. Oxygen and fuel are fed in through the furnace wall by at least one burner located above the m...  
WO/1990/015163A1
A closed remelting furnace (1) comprises a vertical axis (A-A), an electrode support bar (15) for a melting electrode (23), a furnace body (29) with a drive for the electrode support bar and several bottom elements (6, 7) each of which c...  
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...  
WO1990006481A3  
WO/1990/006481A2
Furnace for melting down scrap iron and similar ferrous materials comprising a tiltable vessel (1') with a refractory-lined hearth and at least partially water-cooled side walls, a removable cover (19'), at least one electrode (17'), and...  
WO/1990/005886A1
A cooling panel which is intended to be positioned at the slag line of a tiltable steel-smelt arc furnace of the kind which is fitted with three electrodes, and in which the three electrodes give rise to three regions which are subjected...  
WO/1990/000627A1
In the particular embodiments of the invention described in the specification, a hearth (1) for melting and refining metal has a hearth bed (11) with cooling pipes (12) so that a skull (21) of molten metal is formed and energy input devi...  

Matches 701 - 750 out of 9,958