DE2045721A1 - Carbon plate armour for graphite foil - for fusion electrolysis cells - Google Patents
Carbon plate armour for graphite foil - for fusion electrolysis cellsInfo
- Publication number
- DE2045721A1 DE2045721A1 DE19702045721 DE2045721A DE2045721A1 DE 2045721 A1 DE2045721 A1 DE 2045721A1 DE 19702045721 DE19702045721 DE 19702045721 DE 2045721 A DE2045721 A DE 2045721A DE 2045721 A1 DE2045721 A1 DE 2045721A1
- Authority
- DE
- Germany
- Prior art keywords
- carbon
- graphite
- blocks
- cathode
- foil
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 26
- 239000010439 graphite Substances 0.000 title claims abstract description 26
- 239000011888 foil Substances 0.000 title claims abstract description 18
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 10
- 230000004927 fusion Effects 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 229940125773 compound 10 Drugs 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- ZLVXBBHTMQJRSX-VMGNSXQWSA-N jdtic Chemical compound C1([C@]2(C)CCN(C[C@@H]2C)C[C@H](C(C)C)NC(=O)[C@@H]2NCC3=CC(O)=CC=C3C2)=CC=CC(O)=C1 ZLVXBBHTMQJRSX-VMGNSXQWSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
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)
Abstract
Description
Kathode für Schmelzfluß-Elektrolyse-Öfen Die Erfindung betrifft eine Kathode für Schmelzfluß-Elektrolyse-Öfen, insbesondere für die Schmelzfluß-Elektrolyse von Aluminium gemäß Patentanmeldung P 20 08 215.9.Cathode for Melt Flow Electrolysis Furnaces The invention relates to a Cathode for melt flow electrolysis furnaces, especially for melt flow electrolysis of aluminum according to patent application P 20 08 215.9.
Nach der Patentanmeldung P 20 08 215.9 ist es bekannt, die badseitige Oberfläche von aus Kohlenstoffblöcken bestehenden Kathoden für Schmelzfluß-Elektrolyse-Öfen mit Graphitfolien zu belegen. Graphitfolien sind undurchlässig und verhindern das Eindringen von schmelzflüssigen Salzen und Metallen in das Porensystem von Graphitblöcken, wodurch Reaktionen von Metall und Schmelze mit dem Kohlenstoff vermieden und die Standzeit von Kathoden verlängert werden.According to the patent application P 20 08 215.9 it is known that the bathroom side Surface of cathodes made of carbon blocks for melt flow electrolysis furnaces to be covered with graphite foils. Graphite foils are impermeable and prevent that Penetration of molten salts and metals into the pore system of graphite blocks, whereby reactions of metal and melt with the carbon are avoided and the The service life of cathodes can be extended.
Ein Nachteil des Schutzbelags besteht darin, daß aufgeklebte oder gekittete Graphitfolien durch mechanische Einwirkungen, z.B. durch Krustenbrecher, beschädigt werden können und Salz- bzw. Metallschmelze durch solche Schadensstellen in Kohlenstoffblöcke eindringt.A disadvantage of the protective covering is that glued or cemented graphite foils through mechanical effects, e.g. through crust breakers, can be damaged and molten salt or metal can be damaged by such damage penetrates into carbon blocks.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, Nachteile von aus Kohlenstoffblöcken, kohlenstoffhaltigen Fugenfüllmassen und auf Blöcke und Füllmassen aufgeklebte oder gekittete Graphitfolien bestehenden Kathoden von Schmelzfluß-Elektrolyse-Öfen zu vermeiden, und insbesondere die mechanische Beschädigung von Graphitfolien auszuschließen und die Standzeit von Elektrolysezellen zu vergrößern.The present invention is based on the object of disadvantages of from carbon blocks, carbonaceous joint fillers and on blocks and fillers glued or cemented graphite foils existing cathodes of melt flow electrolysis furnaces to avoid, and especially the mechanical Damage to Exclude graphite foils and increase the service life of electrolytic cells.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine aus Kohlenstoff bzw. Graphit bestehende Schicht auf den Folien angeordnet ist. Die Schicht besteht nach der Erfindung aus Kohlenstoff- bzw.The object is achieved according to the invention in that one made of carbon or graphite existing layer is arranged on the foils. The layer is made according to the invention made of carbon or
Graphitplatten oder aus einer plastischen, bei der Erwärmung der Kathode verkokenden Kohlenstoff- bzw.Graphite plates or from a plastic one when the cathode is heated coking carbon resp.
Graphitstampfmasse.Graphite ramming mass.
Nach der Erfindung ist es vorteilhaft, die Kohlenstoffplatten miteinander und mit den Graphitfolien zu verkleben, wobei die Fugenbreite vorzugsweise < 1 mm ist. Nach einer weiteren Ausführungsform der Erfindung sind die Kohlenstoffplatten gegenüber den Kohlenstoffblöcken versetzt.According to the invention, it is advantageous to connect the carbon plates to one another and to be glued to the graphite foils, the joint width preferably < 1 mm is. According to a further embodiment of the invention, the carbon plates are offset from the carbon blocks.
Die Vorteile der Erfindung bestehen insbesondere darin, daß die Schutzwirkung von Graphitfolien nicht durch mechanische Beschädigungen, sondern durch die langsame Reaktion mit der Badflüssigkeit begrenzt wird und Schmelze erst nach vollständiger chemischer Umsetzung mit der Folie in das Porensystem der Kohlenstoffblöcke eindringen kann. Die Fugen zwischen den Kohlenstoffplatten sind gegenüber den Fugen zwischen den Graphitblöcken versetzt, so daß die Schmelze nach einem nichtausschließbaren Durchbruch entlang einer Fugenwand auf einen kompakten Kohlenstoffblock trifft. Da die Oberfläche von Kohlenstoff- bzw. Graphitschichten besser als die Graphitfolie von Aluminium benetzt wird, ergibt i(h darüberhinaus, besonders bei niedrigen Metallständen, eine gleichmäßige Stromverteilung.The advantages of the invention are in particular that the protective effect graphite foils are not caused by mechanical damage, but by slow Reaction with the bath liquid is limited and melt only after complete chemical reaction with the film penetrate into the pore system of the carbon blocks can. The joints between the carbon plates are opposite the joints between the graphite blocks offset, so that the melt after a non-excludable Breakthrough along a joint wall meets a compact block of carbon. Because the surface of carbon or graphite layers is better than the graphite foil is wetted by aluminum, i (h moreover, especially at low Metal stands, an even power distribution.
Als Beispiel einer erfindungsgemäßen Kathode ist in Fig. 1 ein Längsschnitt einer Kathode für die Aluminium-Schmelzfluß-Elektrolyse wiedergegeben.As an example of a cathode according to the invention, FIG. 1 shows a longitudinal section a cathode for aluminum melt flow electrolysis.
1 sind Kohlenstoffblöcke mit eingestampften oder eingegossenen Stromschienen 4. Die Stampf- oder Gußmasse ist mit 5 bezeichnet. 2 ist ein das Bad seitlich begrenzender Kohlenstoffblock, 6 eine keramische Isolation und 7 die Ofenwanne. Die Fugen zwischen den Blöcken 1 sind mit einer kohlenstoffhaltigen Masse 3 ausgefüllt, die beim Aufheizen der Zelle verkokt. 8 sind bahnen- und streifenartige Graphitfolien. Über den Graphitfolien 8 sind Kohlenstoffplatten 9, deren Dicke 2 cm beträgt, angeordnet. Die thermisch härtbare Kittmasse 10 dient sowohl zum Verkleben von Graphitfolien mit den Kohlenstoffblöcken 1 und den Kohlenstoffplatten 9, als auch zum Verbinden der Kohlenstoffplatten, deren Abstand ca. 0,8 mm beträgt.1 are carbon blocks with rammed or cast-in busbars 4. The ramming or casting compound is denoted by 5. 2 is one that delimits the bathroom at the side Carbon block, 6 ceramic insulation and 7 the furnace pan. The joints between the blocks 1 are filled with a carbonaceous mass 3, which when heated coked in the cell. 8 are sheet-like and strip-like graphite foils. Over the graphite foils 8 carbon plates 9, the thickness of which is 2 cm, are arranged. The thermal hardenable cement compound 10 is used both for gluing graphite foils with the carbon blocks 1 and the carbon plates 9, as well as for connecting the carbon plates, their Distance is approx. 0.8 mm.
5 Patentansprüche 1 Figur5 claims 1 figure
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702045721 DE2045721A1 (en) | 1970-09-16 | 1970-09-16 | Carbon plate armour for graphite foil - for fusion electrolysis cells |
| CH99071A CH567579A5 (en) | 1970-02-21 | 1971-01-22 | Carbon plate armour for graphite foil - for fusion electrolysis cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702045721 DE2045721A1 (en) | 1970-09-16 | 1970-09-16 | Carbon plate armour for graphite foil - for fusion electrolysis cells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2045721A1 true DE2045721A1 (en) | 1972-03-23 |
Family
ID=5782559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702045721 Pending DE2045721A1 (en) | 1970-02-21 | 1970-09-16 | Carbon plate armour for graphite foil - for fusion electrolysis cells |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2045721A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2388901A1 (en) * | 1977-04-25 | 1978-11-24 | Union Carbide Corp | LINING OF THE BOTTOM OF THE OUTER STEEL SHELL OF AN ELECTROLYTIC ORE REDUCTION TANK |
| EP0219877A1 (en) * | 1985-10-24 | 1987-04-29 | Norsk Hydro A/S | Laminated carbon cathode for cells for the production of aluminium by electrolytic smelting |
-
1970
- 1970-09-16 DE DE19702045721 patent/DE2045721A1/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2388901A1 (en) * | 1977-04-25 | 1978-11-24 | Union Carbide Corp | LINING OF THE BOTTOM OF THE OUTER STEEL SHELL OF AN ELECTROLYTIC ORE REDUCTION TANK |
| US4175022A (en) * | 1977-04-25 | 1979-11-20 | Union Carbide Corporation | Electrolytic cell bottom barrier formed from expanded graphite |
| EP0219877A1 (en) * | 1985-10-24 | 1987-04-29 | Norsk Hydro A/S | Laminated carbon cathode for cells for the production of aluminium by electrolytic smelting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2312439C2 (en) | Cathode pan of a molten aluminum electrolysis cell | |
| DE1251962B (en) | Cathode for an electrolytic cell for the production of aluminum and process for the production of the same | |
| DE2105247C3 (en) | Furnace for the fused aluminum electrolysis | |
| DE69404829T2 (en) | THE COMBINATION OF FIREPROOF HARD MATERIAL PARTICLES WITH CARBON CARRIERS | |
| DE2817202A1 (en) | EXPANDED GRAPHITE BARRIER ON THE BOTTOM OF AN ELECTROLYTIC CELL | |
| DE2157939C3 (en) | Galvanic element with an alkali metal that is liquid at operating temperature as the negative and a liquid sulfur material as the positive active material | |
| DE2707085C2 (en) | Method for producing a tight joint between a cation-permeable solid electrolyte tube made of? -Type alumina and a tubular ceramic head made of? -Alumina | |
| DE3413745C2 (en) | DC arc furnace | |
| US3459515A (en) | Cermets of aluminum with titanium carbide and titanium and zirconium borides | |
| DE2635900A1 (en) | SODIUM-SULFUR BATTERY OR CELL WITH OUTSIDE BEARING | |
| DE1533439A1 (en) | Electrolytic cell for the production of aluminum and method of operating the same | |
| DE3506200A1 (en) | CATHODE TUB FOR AN ALUMINUM ELECTROLYSIS CELL AND METHOD FOR THE PRODUCTION OF THE COMPOSITE BODIES THEREOF THE SIDE WALL | |
| DE2045721A1 (en) | Carbon plate armour for graphite foil - for fusion electrolysis cells | |
| DE3116273C2 (en) | Electrolysis tank | |
| DE2624368C3 (en) | Method and device for producing a protective layer | |
| DE2008215A1 (en) | Graphite sheathing for aluminium electrolysi | |
| DE863999C (en) | Process for connecting the carbon blocks of continuous electrodes for electric furnaces, in particular for fused metal electrolysis | |
| DE2603374A1 (en) | PROCEDURE FOR CHARGING SECONDARY BATTERIES | |
| CH567579A5 (en) | Carbon plate armour for graphite foil - for fusion electrolysis cells | |
| DE2632412A1 (en) | PROCESS FOR PRODUCING A JOINT BETWEEN WORKPIECES MADE FROM ALKALINE BETA ALUMINUM OXYDE AND ALPHA ALUMINUM OXYDE | |
| DE60202265T2 (en) | ALUMINUM-ADJUSTABLE POROUS CERAMIC MATERIAL | |
| DE3506085C2 (en) | ||
| DE3516600C2 (en) | Tank for acid pickling of metal strips | |
| EP3350358B1 (en) | Cathode bottom for producing aluminum | |
| DE1496180B2 (en) | METHOD OF MANUFACTURING A SEMI-SOLID ELECTROLYTE BODY FOR FUEL CELLS |