EP0026735B1 - Dispositif pour le chargement de cuves d'électrolyse et procédé pour sa mise en oeuvre - Google Patents
Dispositif pour le chargement de cuves d'électrolyse et procédé pour sa mise en oeuvre Download PDFInfo
- Publication number
- EP0026735B1 EP0026735B1 EP80810259A EP80810259A EP0026735B1 EP 0026735 B1 EP0026735 B1 EP 0026735B1 EP 80810259 A EP80810259 A EP 80810259A EP 80810259 A EP80810259 A EP 80810259A EP 0026735 B1 EP0026735 B1 EP 0026735B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alumina
- pressure vessel
- conveyor
- pipe
- compressed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/14—Devices for feeding or crust breaking
Definitions
- the present invention relates to a device for the automatic, process-controlled charging of electrolysis furnaces for aluminum production, with a pressure vessel for alumina and flux, delivery lines to the electrolysis furnaces and an alumina bunker arranged on each electrolysis furnace.
- the invention further relates to a method for operating the device.
- the cell is usually operated periodically in normal operation, even if there is no anode effect.
- the bath crust must be hammered in and the alumina concentration increased by adding new aluminum oxide, which corresponds to cell operation.
- the aluminum manufacturers have increasingly switched to central operation in the longitudinal axis of the furnace.
- the alumina is added either locally and continuously according to the “point feeder” system or not continuously distributed over the entire longitudinal axis of the furnace.
- a storage bunker for the alumina is arranged on the electrolysis cell Lateral control of the electrolysis furnaces proposed recently (DE Patent No. 2731908.0).
- alumina bunkers can be refilled from a silo that is arranged on an indoor vehicle or an oven manipulator.
- DE-B-2 135485 proposes a device for transporting powdery or granular material from a horizontal or inclined conveying line, which is also particularly suitable for the transport of aluminum oxide.
- the two lines for the material to be conveyed and the compressed air are connected to one another via a porous base which extends essentially over the entire length of the tube. Air can pass through this porous floor and maintain the loosening state of the conveyed material.
- this conveyor pipe has the disadvantage that most of the compressed air, following the path of least resistance, enters the upper line containing the material to be conveyed at the end of the lower compressed air line, where the air resistance is several orders of magnitude higher than in the empty lower line .
- DE-A-2 209 674 and DE-B-1 506 848 relate to the conveyance of short plugs of material. Specific design variants of connections of the compressed air line to the delivery line are disclosed, which, however, are not suitable for continuous dense phase delivery.
- the inventor has set himself the task of creating a device for the automatic, process-controlled charging of electrolysis furnaces for aluminum production and a method for their operation which, with minimal energy expenditure, have such low wear on pipe material that the delivery pipes reach or exceed the service life of the electrolysis cell . Furthermore, the fast and precise supply of flux to a particular furnace should be guaranteed.
- At least parts of the preferably round steel delivery tube are made of porous material, e.g. B. sintered bronze, sintered iron or sintered aluminum oxide, wherein the porous material can also be formed as a wire mesh. If the porous materials form only a small part of the side surface of the conveyor tube, they can be fastened in recesses using suitable means, e.g. B. by shrinking or gluing, in the case of steel pipes and metallic porous materials also by soldering.
- suitable means e.g. B. by shrinking or gluing
- the cross section of a delivery pipe can be of any design, but round cross sections have proven to be particularly favorable.
- the compressed air pipe which runs parallel to the delivery pipe and also has any desired, but expediently round or rectangular cross section, can be arranged next to, in or around the delivery pipe.
- the restrictions arranged along the entire length of the compressed air tube are fixed or variable constrictions that become smaller and smaller in the direction of conveyance. These restrictions have the effect that the reductions in the cross section in the pressure pipe, which are arranged at regular intervals, equalize the amount of compressed air entering the delivery line via the porous material. In other words, most of the compressed air no longer enters the end of the delivery pipe where the resistance is lowest.
- Fixed constrictions can be achieved, for example, by indentations in the walls of the compressed air line or by bolts or lamellae or profile pieces fastened to the walls thereof, variable constrictions, on the other hand, by screws or bolts protruding into the compressed air pipe, which can be regulated with a locking screw or electromagnetically.
- the installation of restrictions only makes sense if the delivery pipe is made of porous material in its area, otherwise the desired air passage that is regular over the entire pipe length cannot be achieved.
- the distance between the restrictions can be, for example, 1-6 times the diameter of the delivery pipe.
- the solution to the problem according to the invention not only brings about a variant in the course of progressing automation, but also an improvement in occupational hygiene, occupational safety and air pollution control.
- a system has been created that meets all the requirements mentioned.
- the energy used to carry out the method is kept to a minimum by an optimal arrangement of useful devices.
- the essential elements of the electrolytic cell 10 are the steel tub 12, the thermal insulation 14, the carbon base 16, the cathode bars 18, the liquid aluminum 20 lying on the carbon base, which is the actual cathode, the electrolyte 22, the carbon anodes 24, and the anode rods 26 and the anode carrier 28.
- the following components are introduced individually or as a mixture into the storage bunker 30, as required: fresh clay, fluoride-enriched clay, flux and ground flux residues.
- the alumina bunker 30 is provided on both long sides with a metering device 32, which causes the alumina to be fed into the bath in portions via the downpipe 34.
- the impact device 36 is generally actuated, the electrolyte crust, for example, being impacted by a pneumatically actuated chisel.
- the alumina bunker 30 is connected to the furnace casing 38 via a connecting pipe 40.
- the exhaust gases produced during the electrolysis process are removed together with the secondary air entering through opening 44, which is represented as representative of leaks and other leaks, the conveying air emerging from the outlet connection 46 of the pipe section 48 and the exhaust air drawn off via line 40 from the alumina bunker 30 through line 50 from the encapsulated cell dissipated.
- the entire interior of the furnace enclosure is by the suction fan 52 under a slight negative pressure of a few mm WS, z. B. 10 mm.
- the pressure vessel 54 is designed such that its underside initially contains a funnel-shaped constriction 56 with a large opening angle and then a funnel-shaped constriction 58 with a small opening angle.
- the pressure vessel can be closed on its underside with a shut-off device, for example a ball valve.
- the feed pipe 62 opens into the funnel-shaped constriction with a small opening angle, separated by the ball valve.
- the feed pipes 64 for feeding the electrolysis cells branch off from this feed pipe which forms the main channel. As will be shown later in FIG. 6, it is not necessary with the arrangement according to the invention to provide any shut-off elements at the branching points.
- a compressed air line 66 is arranged parallel to the delivery pipes 62 and 64, which enables the dense phase delivery in the manner described below.
- the delivery valve 68 which is arranged in the immediate vicinity of the electrolysis cell 10, a piece of the delivery line 64 is designed as an electrical insulating piece 70 in order to prevent short circuits between the ovens which are connected in series.
- the pipe section 48 is nothing more than a continuation of the delivery pipe 64.
- the compressed air line 66 also continues to the end of the pipe section 48.
- the measuring probe 72 of the alumina bunker 30 serves to indicate the minimum fill level with alumina.
- a compressor 74 is provided to provide the compressed air.
- the compressed air can be routed to the container 54, the delivery pipe 62 or the compressed air pipe 66 in a store, not shown, equipped with the known control devices via pressure control valves 76, switching valves 78 and adjustment valves 80.
- a controlled valve 82 is provided for the evacuation of the pressure container 54.
- the limit switch 84 ensures that the pressure container 54 is filled. With a pneumatic valve control 86, the batches in the pressure vessel can be set precisely.
- a steel tube 30, 62, 64 with an annular cross section, in which the powdery or granular conveyed material 88 is transported, has an inner diameter of approximately 50-100 mm and a wall thickness of approximately 3 mm.
- a compressed air tube 66 with a rectangular cross section is welded onto the conveyor tube 30, 62, 64. Circular openings are recessed in the upper wall of the conveyor tube, into which porous disks 90 are soldered.
- the lower end face of this screw is designed according to the surface of the porous material, i. H. as a horizontal surface. However, this end face can also be hemispherical, dome-shaped or the like.
- a thread carrier (nut) 94 is welded on.
- a lock nut 96 is used to fix the adjusting screw.
- the dimensions of the remaining free opening in the compressed air tube and the part of the adjusting screw protruding into the compressed air tube are of a comparable order of magnitude.
- the resistance in the conveying tube 30, 62, 64 is the smallest at the adjusting screw C, so that most air enters there.
- the resistance in the delivery pipe is comparatively high, meaning that only little delivery air enters. This causes material to be conveyed to the right of C to be pushed off and pushed in from the left in the direction of the arrow F s .
- FIG. 4 In contrast to the adjustable restrictions shown in FIGS. 2 and 3, a fixed restriction is shown in FIG. 4. Above the porous material 90 soldered into a recess in the steel wall of the delivery pipe 30, 62, 64, a profile piece 98 is arranged, which is fastened to the upper wall of the compressed air pipe 66.
- This invariable, ie non-variable restriction in the form of an inverted T causes part of the compressed air F L to flow through the gap between porous material 90 and profile piece 98.
- the resistance is increased to a greater or lesser extent, so that approximately the same amount of air passes from the compressed air pipe into the delivery pipe through all disks 90 made of porous material along the delivery pipe.
- the distance d increases in the conveying direction.
- the compressed air tube shown is very oversized, in reality its cross-sectional dimensions can be as follows with a delivery tube diameter of 75 mm: 20 mm wide, 16 mm high.
- a wear-resistant insert for. B. made of sintered aluminum oxide, used as the inner wall of the delivery pipe. Porous material disks 90 are also used in this ceramic molded part 100.
- the shock-sensitive insert 100 is embedded in a protective cover 102.
- the annular gap 104 formed between the wear-resistant insert 100 and the protective cover 102 is preferably filled with a foam.
- a reinforcing ring 106 is placed in order to compensate for the transition to the wear-resistant insert 100 with thicker walls.
- the straight and curved tubes are screwed together by means of flanges 108, and a flat seal 110 is arranged between the flanges 108.
- FIG. 6 shows a branching of the delivery line system according to the invention, which shows that no switch or no three-way valve is necessary.
- the ball valve 114a is open, while the ball valve 114b is closed.
- solenoid valves 116 and 118 are open, the conveying air passing from the compressed air channels 66 provided with restrictions 112 into the conveying line 30, 62, 64 has the effect that the material is conveyed in a dense flow through the open ball valve 114a.
- Fig. 7 the lower part of the pressure vessel 54 is shown in detail.
- the funnel-shaped constriction 56 with a large opening angle like the rest of the container in the cylindrical part, is filled with alumina.
- the funnel-shaped constriction 58 with a small opening angle is filled with cryolite 124, milled flow 126 and aluminum fluoride 128.
- the portion of flux that fills the funnel-shaped constriction 58 which instead of being mixed in layers, can be filled in, but is only a few percent of the entire batch, e.g. B. 0.5-5%. If the ball valve 60 is opened for charging an electrolysis cell, it is ensured that the fluxes flowing away in the core flow are in any case completely supplied to the cell.
- any fine-grained bulk material can be conveyed with the device and the method according to the invention in addition to the alumina described above.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Ticket-Dispensing Machines (AREA)
- Electric Stoves And Ranges (AREA)
- Disintegrating Or Milling (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Electric Ovens (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Looms (AREA)
- Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)
- Vending Machines For Individual Products (AREA)
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80810259T ATE8280T1 (de) | 1979-08-28 | 1980-08-21 | Vorrichtung zum beschicken von elektrolyseoefen und verfahren zu deren betrieb. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH7854/79 | 1979-08-28 | ||
CH785479A CH645677A5 (de) | 1979-08-28 | 1979-08-28 | Vorrichtung zum beschicken von elektrolysezellen und verfahren zu deren betrieb. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0026735A1 EP0026735A1 (fr) | 1981-04-08 |
EP0026735B1 true EP0026735B1 (fr) | 1984-07-04 |
Family
ID=4331428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80810259A Expired EP0026735B1 (fr) | 1979-08-28 | 1980-08-21 | Dispositif pour le chargement de cuves d'électrolyse et procédé pour sa mise en oeuvre |
Country Status (18)
Country | Link |
---|---|
US (1) | US4450053A (fr) |
EP (1) | EP0026735B1 (fr) |
JP (1) | JPS5635787A (fr) |
AT (1) | ATE8280T1 (fr) |
AU (1) | AU537599B2 (fr) |
BR (1) | BR8005400A (fr) |
CA (1) | CA1152453A (fr) |
CH (1) | CH645677A5 (fr) |
DE (2) | DE3022643C2 (fr) |
ES (1) | ES494462A0 (fr) |
GR (1) | GR69694B (fr) |
NO (1) | NO154525C (fr) |
NZ (1) | NZ194722A (fr) |
PL (1) | PL226147A1 (fr) |
SU (1) | SU1063293A3 (fr) |
TR (1) | TR21343A (fr) |
YU (1) | YU212780A (fr) |
ZA (1) | ZA805198B (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2504158B1 (fr) * | 1981-04-15 | 1985-08-30 | Aluminium Grece | Procede et appareillage d'alimentation ponctuelle en alumine de cuves d'electrolyse pour la production d'aluminium |
FR2534891B1 (fr) * | 1982-10-22 | 1987-01-09 | Pechiney Aluminium | Dispositif clos a fluidisation potentielle pour le controle horizontal de materiaux pulverulents |
FR2562878B2 (fr) * | 1984-04-12 | 1989-06-30 | Pechiney Aluminium | Dispositif clos a fluidisation potentielle pour le convoyage horizontal en lit dense de materiaux pulverulents |
DE3664622D1 (en) * | 1985-10-31 | 1989-08-31 | Alusuisse | Device for charging bulk material containers, and its use |
US4938848A (en) * | 1989-02-13 | 1990-07-03 | Aluminum Company Of America | Method and apparatus for conveying split streams of alumina powder to an electrolysis cell |
FR2778393B1 (fr) * | 1998-05-11 | 2000-06-16 | Pechiney Aluminium | Procede pour le convoyage en lit hyperdense de materiaux pulverulents et dispositif a fluidisation potentielle destine a le mettre en oeuvre |
FR2831528B1 (fr) * | 2001-10-26 | 2004-01-16 | Pechiney Aluminium | Systeme de repartition de matiere pulverulente avec des debits pondereux controles |
FR2952363B1 (fr) * | 2009-11-09 | 2011-11-11 | Alcan Int Ltd | Dispositif a fluidisation potentielle destine au convoyage de materiaux pulverulents en lit hyperdense |
FR2980783B1 (fr) * | 2011-10-04 | 2016-05-13 | Rio Tinto Alcan Int Ltd | Procede et dispositif de distribution d'un materiau fluidisable, et installation incluant ledit dispositif |
CN104264188B (zh) * | 2014-09-25 | 2016-11-30 | 中国铝业股份有限公司 | 控制型智能打壳***与方法 |
EP3947218A1 (fr) * | 2019-04-04 | 2022-02-09 | Reel Alesa AG | Dispositif d'alimentation à flux de précision |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2209674A1 (de) * | 1972-03-01 | 1973-09-06 | Waeschle Maschf Gmbh | Rohr fuer eine in abstaenden mit zusatzluft zu beschickende foerderleitung |
US3797707A (en) * | 1971-04-20 | 1974-03-19 | Jenike And Johanson Inc | Bins for storage and flow of bulk solids |
DE1506848B2 (de) * | 1966-06-16 | 1977-07-21 | Gebruder Buhler AG, Uzwil (Schweiz) | Rohrleitung fuer den pneumatischen oder hydraulischen transport kurzer, gleichartiger materialpfropfen |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB770304A (en) * | 1953-04-14 | 1957-03-20 | Buehler Ag Geb | Improvements in or relating to process and means for regulating the introduction of bulk goods into a pneumatic conveying line |
US2989349A (en) * | 1956-09-19 | 1961-06-20 | Hartley Controls Corp | Pneumatic delivery and time-controlled measuring of fine material such as powder |
CH366976A (de) * | 1957-12-19 | 1963-01-31 | Elektrokemisk As | Verfahren zur Beschickung von Öfen für die schmelzelektrolytische Herstellung von Aluminium |
US3135672A (en) * | 1959-01-16 | 1964-06-02 | Nippon Light Metal Co | Method for feeding alumina to electrolytic cell |
NL126517C (fr) * | 1959-09-03 | |||
AT248133B (de) * | 1964-04-16 | 1966-07-11 | Vmw Ranshofen Berndorf Ag | Elektropneumatische Vorrichtung zur automatischen periodischen Tonerdezugabe bei Aluminiumelektrolyseöfen |
AT237909B (de) * | 1962-12-07 | 1965-01-11 | Vmw Ranshofen Berndorf Ag | Elektropneumatische Vorrichtung zur automatischen periodischen Tonerdezugabe bei Aluminiumelektrolyseöfen |
FR1526766A (fr) * | 1963-09-24 | 1968-05-31 | Pechiney Prod Chimiques Sa | Machine automatique pour le piquage et l'alimentation des cuves d'électrolyse ignée |
AT271924B (de) * | 1965-09-07 | 1969-06-25 | Femipari Ki | Verfahren und Einrichtung zum automatischen Aufbrechen der Krusten von Aluminiumelektrolyse-Bäderbatterien und zum Chargieren dieser Bäder mit Tonerde |
US3681229A (en) * | 1970-07-17 | 1972-08-01 | Aluminum Co Of America | Alumina feeder |
US3664935A (en) * | 1971-01-21 | 1972-05-23 | Arthur F Johnson | Effluent filtering process and apparatus for aluminum reduction cell |
FR2139648B1 (fr) * | 1971-05-28 | 1973-08-10 | Prat Daniel Poelman | |
US3844446A (en) * | 1971-08-04 | 1974-10-29 | Fuller Co | System for conveying solid particulate materials |
US3901787A (en) * | 1974-03-07 | 1975-08-26 | Nippon Light Metal Co | Alumina feeder for electrolytic cells |
DE2440888C3 (de) * | 1974-08-27 | 1978-11-23 | Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg | Anlage zum aufeinanderfolgenden Beschicken mehrerer, hintereinander an eine pneumatische Förderleitung über Abscheider angeschlossener Entnahmestationen mit Schüttgut |
US4016053A (en) * | 1975-10-01 | 1977-04-05 | Kaiser Aluminum & Chemical Corporation | Feeding particulate matter |
DE2625263C3 (de) * | 1976-06-04 | 1980-07-31 | Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg | Vorrichtung zur Aufgabe von Schüttgut in eine pneumatische Förderleitung |
US4299683A (en) * | 1980-07-17 | 1981-11-10 | Aluminum Company Of America | Apparatus and method for efficient transfer of powdered ore |
-
1979
- 1979-08-28 CH CH785479A patent/CH645677A5/de not_active IP Right Cessation
-
1980
- 1980-06-18 DE DE3022643A patent/DE3022643C2/de not_active Expired
- 1980-08-06 GR GR62621A patent/GR69694B/el unknown
- 1980-08-08 PL PL22614780A patent/PL226147A1/xx unknown
- 1980-08-13 US US06/177,729 patent/US4450053A/en not_active Expired - Lifetime
- 1980-08-20 SU SU802963349A patent/SU1063293A3/ru active
- 1980-08-21 AT AT80810259T patent/ATE8280T1/de active
- 1980-08-21 DE DE8080810259T patent/DE3068436D1/de not_active Expired
- 1980-08-21 NZ NZ194722A patent/NZ194722A/en unknown
- 1980-08-21 EP EP80810259A patent/EP0026735B1/fr not_active Expired
- 1980-08-21 AU AU61642/80A patent/AU537599B2/en not_active Expired
- 1980-08-22 ZA ZA00805198A patent/ZA805198B/xx unknown
- 1980-08-22 NO NO802501A patent/NO154525C/no unknown
- 1980-08-22 ES ES494462A patent/ES494462A0/es active Granted
- 1980-08-26 YU YU02127/80A patent/YU212780A/xx unknown
- 1980-08-26 BR BR8005400A patent/BR8005400A/pt not_active IP Right Cessation
- 1980-08-27 CA CA000359078A patent/CA1152453A/fr not_active Expired
- 1980-08-28 JP JP11899180A patent/JPS5635787A/ja active Pending
- 1980-08-28 TR TR21343A patent/TR21343A/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1506848B2 (de) * | 1966-06-16 | 1977-07-21 | Gebruder Buhler AG, Uzwil (Schweiz) | Rohrleitung fuer den pneumatischen oder hydraulischen transport kurzer, gleichartiger materialpfropfen |
US3797707A (en) * | 1971-04-20 | 1974-03-19 | Jenike And Johanson Inc | Bins for storage and flow of bulk solids |
DE2209674A1 (de) * | 1972-03-01 | 1973-09-06 | Waeschle Maschf Gmbh | Rohr fuer eine in abstaenden mit zusatzluft zu beschickende foerderleitung |
Also Published As
Publication number | Publication date |
---|---|
NO802501L (no) | 1981-03-02 |
JPS5635787A (en) | 1981-04-08 |
AU6164280A (en) | 1981-04-09 |
AU537599B2 (en) | 1984-07-05 |
CH645677A5 (de) | 1984-10-15 |
SU1063293A3 (ru) | 1983-12-23 |
DE3022643A1 (de) | 1981-03-12 |
TR21343A (tr) | 1984-04-16 |
NZ194722A (en) | 1984-07-31 |
DE3022643C2 (de) | 1982-12-30 |
ZA805198B (en) | 1981-09-30 |
BR8005400A (pt) | 1981-03-10 |
EP0026735A1 (fr) | 1981-04-08 |
PL226147A1 (fr) | 1981-04-24 |
ATE8280T1 (de) | 1984-07-15 |
YU212780A (en) | 1983-02-28 |
NO154525C (no) | 1986-10-08 |
GR69694B (fr) | 1982-07-08 |
NO154525B (no) | 1986-06-30 |
ES8104441A1 (es) | 1981-04-01 |
DE3068436D1 (en) | 1984-08-09 |
CA1152453A (fr) | 1983-08-23 |
ES494462A0 (es) | 1981-04-01 |
US4450053A (en) | 1984-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3108121C2 (de) | Vorrichtung zum dosierten Zuführen von Tonerde | |
EP0026735B1 (fr) | Dispositif pour le chargement de cuves d'électrolyse et procédé pour sa mise en oeuvre | |
DE2135485A1 (de) | Vorrichtung zum Zuführen von Aluminium oxid | |
DE3125096C2 (de) | Vorrichtung und Verfahren zum portionenweisen Zuführen von Schüttgut | |
DD211537A5 (de) | Foerderanlage zum transport pulverfoermiger, fluidisierbarer materialien | |
DE3022656C2 (de) | Anlage zum pneumatischen Fördern von pulverförmigem oder körnigem Gut | |
EP0062605B1 (fr) | Dispositif pour le dosage par portions d'un matériau en vrac pouvant être fluidifié | |
EP0538265B1 (fr) | Dispositif d'adjonction en continu d'additifs de coulee a la surface d'une masse fondue dans une coquille de coulee continue | |
DE2557176C3 (de) | Vorrichtung zur Beschickung von elektrischen Schmelzöfen | |
DE2735180C2 (de) | Schüttgutbehälter für partikelförmiges Feststoffmaterial | |
EP0313959A2 (fr) | Installation pour l'élaboration de l'acier, en particulier une mini-installation | |
DE3326505C2 (de) | Beschickungsvorrichtung für metallurgische Öfen | |
DE19923205C1 (de) | Verfahren und Anlage zum Behandeln von flüssigen Metallen | |
EP0112279A2 (fr) | Dispositif et procédé pour le prélèvement des quantités dosées de matière solide en vrac | |
EP1105544B1 (fr) | Procede de production de zinc selon le procede imperial smelting dans une installation a four vertical pour imperial smelting | |
DE19832192A1 (de) | Verfahren zur Zuführung von Metallschmelze zu einer Füllkammer einer Gußanlage und Gußanlage zur Durchführung des Verfahrens | |
DE4332760A1 (de) | Verfahren zum Betreiben einer Niederdruckmetallgießvorrichtung und Niederdruckmetallgießvorrichtung dafür | |
DE938416C (de) | Wendelrutsche | |
DE3125045A1 (de) | Vorrichtung zur portionenweisen dosierung eines fluidisierbaren schuettgutes und verfahren zu deren betrieb | |
CH650591A5 (en) | Device for the proportioned supply of fine-grained pourable bulk material | |
DE3102270C2 (fr) | ||
DE4310849A1 (de) | Verfahren zum geregelten Austrag des bei einem Rostkühler durch den Rost nach unten fallenden staubförmigen Gutmaterials | |
DE2541048A1 (de) | Geraet zum rueckladen von schuettguetern aus mischhalden | |
DE19845573A1 (de) | Silofahrzeug | |
CH645676A5 (en) | Girder for aluminium electrolytic cells |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19801121 |
|
AK | Designated contracting states |
Designated state(s): AT CH DE FR GB IT NL SE |
|
ITF | It: translation for a ep patent filed |
Owner name: DE DOMINICIS & MAYER S.R.L. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): AT CH DE FR GB IT LI NL SE |
|
REF | Corresponds to: |
Ref document number: 8280 Country of ref document: AT Date of ref document: 19840715 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3068436 Country of ref document: DE Date of ref document: 19840809 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
EAL | Se: european patent in force in sweden |
Ref document number: 80810259.4 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19990726 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19990817 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19990819 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19990820 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19990826 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990907 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19990908 Year of fee payment: 20 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20000820 Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20000820 Ref country code: CH Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20000820 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20000821 Ref country code: AT Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20000821 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 20000830 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Effective date: 20000820 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
NLV7 | Nl: ceased due to reaching the maximum lifetime of a patent |
Effective date: 20000821 |
|
EUG | Se: european patent has lapsed |
Ref document number: 80810259.4 |