WO2019174948A1 - Cathode elements for a hall-héroult cell for aluminium production and a cell of this type having such elements installed - Google Patents
Cathode elements for a hall-héroult cell for aluminium production and a cell of this type having such elements installed Download PDFInfo
- Publication number
- WO2019174948A1 WO2019174948A1 PCT/EP2019/055300 EP2019055300W WO2019174948A1 WO 2019174948 A1 WO2019174948 A1 WO 2019174948A1 EP 2019055300 W EP2019055300 W EP 2019055300W WO 2019174948 A1 WO2019174948 A1 WO 2019174948A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- collector plate
- element according
- cathode
- cathode element
- collector
- Prior art date
Links
- 239000004411 aluminium Substances 0.000 title claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000004020 conductor Substances 0.000 claims abstract description 62
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 6
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 230000000295 complement effect Effects 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 15
- 238000009826 distribution Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009975 flexible effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000003039 volatile agent Substances 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
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/02—Electrodes; Connections thereof
-
- 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
-
- 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
- C25C3/16—Electric current supply devices, e.g. bus bars
Definitions
- the present invention relates to cathode elements for a Hall-Heroult cell for aluminium production and a cell of this type having such elements installed.
- cathode elements for aluminium production cells are made of pre-baked cathode blocks or bodies of a calcined carbonaceous material, the bodies having preformed grooves or slots in the bottom thereof that allow current leads such as collector bars to be entered into them and rodded to it.
- the space between the wall of the slots and the bars can commonly be filled with melted cast-iron or a contacting paste or glue for the fixation of said collector bars.
- the present invention relates to cathode elements based upon collector plates with carbonaceous bodies where it is included several novel and inventive features in the construction thereof. Some main elements are related to;
- the collector plate can comprise at least one horizontal current outlet on at least one side and/or at least one vertical metallic current outlet connected to the collector plate.
- the collector plate can be planar without protruding collector elements and the carbonaceous body can be without matching slots, the rodding material simply forms a layer of electric conductive material, that may comprise electrical conductive particles (0 - 100 wt%), arranged in a space between the collector plate and the carbonaceous body.
- the carbonaceous body is rodded to the collector plate in a manner where the outer end part of the carbonaceous body is electrically insulated from the collector plate, at a distance up to 450 mm from the end thereof and inwards.
- the carbonaceous body is rodded to the collector plate in a manner where the outer end parts of the carbonaceous body are electrically insulated from the collector plate at different lengths on the two ends of the plate (asymmetric configuration).
- thermocouple is inserted into a metallic component inside of or below the collector plate to be able to monitor the temperature at that location.
- the at least one horizontal current outlet is integrated with the collector plate.
- it is integrated in a slot in said collector plate.
- the horizontal current outlet comprises one current conductor part integrated with the collector plate by a press-fit (knock) fixation in a recess of the collector plate that is complementary with a corresponding part of the conductor.
- the part of the current conductor integrated to the collector plate has a delta shaped part.
- it comprises at least one horizontal current outlet on each end being integrated with the collector plate.
- the cross section of or the insertion length of the horizontal current outlet at one end is different to that of the other end (asymmetric).
- the current outlet comprises a copper conductor preferably covered by a protective sheet material.
- At least one vertical current outlet at the opposite side of the collector plate than the carbonaceous body.
- the vertical outlet comprise a socket integrated with the collector plate wherein a rod-shaped current conductor is attached to the socket.
- the socket can be of metallic material and welded to the collector plate.
- the fixation is a press-fit (knock) fixation.
- the socket has internal threads at its outermost end for receiving a sleeve with complementary external threads, wherein the sleeve surrounds the current conductor and where the end of the sleeve abuts an annular flange or ring at the current rod for forcing the rod into the socket when tightened.
- the current conductor is made out of copper or an alloy thereof.
- At least one metallic collector element is arranged at the upper side of a metallic collector plate, where said collector element is embedded in a corresponding recess in the bottom part of the carbonaceous body, the recess being wider than the collector element and being filled with an electric conductive material comprising conductive particles.
- collector elements there are one or more collector elements, preferably 3 to 7 being separated at a distance of typically 50 mm to 150 mm.
- the at least one collector element(s) is of same length or shorter length than the carbonaceous body.
- an electrolysis cell of Hall-Heroult type can comprise several cathode elements of the invention where the cell is built with several cathode elements and in a configuration of only the same type of elements.
- an electrolysis cell of Hall-Heroult type can comprise several cathode elements of the invention where the cell is built with several cathode elements and in a configuration of different elements.
- the collector plate can have one to five inserts of materials with higher electric conductivity, like copper.
- the collector plate can have horizontal outlets (HO) made from steel or copper or some similar good conducting material reaching out of the cathode shell to allow a connection to the cathode flexibles.
- HO horizontal outlets
- each collector plate can have none, one or two HOs on each end and according to a different aspect, the HOs can be of rectangular or round cross section.
- the HO can be inserted into a slot (groove) in the plate from top, which can be closed with a welded steel plate from top, or into open space from the side of the plate, preferably when a round cross-section is applied.
- the HOs can be attached to the plate by welding, mechanical press fitting, thermal press fitting, knock-in cones, threads, or a combination of those to get a strong mechanical and electric feasible connection.
- the HO can be attached to a delta-shaped insert of good conducting material, like copper, to allow a low-resistance for the current flow.
- the HOs can be connected to the cathode flexes by welding or clamps.
- the HOs on both side of the collector plate can have different cross section and insertion depth into the plate to allow a specific electric resistance on each side.
- the HOs can be long enough to reach out of the cathode shell, or they are short enough to allow a vertical placement of the cathode assembly into the cathode lining.
- each HO in the steel shell there is a round or rectangular opening for each HO in the steel shell.
- this opening is sealed with a steel frame, a sealing rope and a plate, which is fixed to press on the sealing rope ensuring a tight sealing between shell and HO.
- one or more VOs can be attached to each cathode assembly from the bottom side to conduct electric current to busbars under the cathode shell.
- each VO can be of steel or copper or another good electrical conducting material, and according to one other aspect the cross section can be round or rectangular.
- a protecting steel socket on the upper part below the plate can be applied to allow a fixation of the VO with good mechanical and electric contact and protection of the conductive material from aggressive chemicals or the VO can be protected by a steel tube reaching down to or close to the bottom of the steel shell.
- the mounting of the VO allows pre-installation to the plate, e.g. by welding, or it can be mounted after the plate is installed into the lining.
- a sealing like at the HOs can be applied at the VOs.
- the space around the VOs can be filled with loose refractory material or powder after the bottom shell sealing is applied.
- This filling can be applied from the side before the neighbouring cathode assembly is installed.
- the length of the HOs is too long to allow a straight vertical placement of the cathode assembly, a swing in has to be applied. If VOs are present, some refractory bricks close to the centre of the lining have to be placed after installation of the plate to allow a horizontal shift of the assembly.
- the difference in thermal expansion at operating temperatures between the copper connectors can ensure high pressure at the contact with low electric resistance.
- the cathode element with collector plate can typically have less height than a design with traditional collector bars - when the same height for carbon is assumed - this extra space in height can be used for higher botom insulation or higher cavity.
- the present cathode design has shown to be very advantageous with regard to the magnetohydrodynamic stability of the cell it has been installed in, it has shown to have an improved life cycle and space usage and in operation, and it also represents a low cathode voltage drop with regard to a conventional cathode design.
- Fig. 1 discloses in a first embodiment a divided cathode element, seen in perspective, where a collector plate is divided in two sections,
- Fig. 2 discloses an embodiment of a non-divided cathode element in a cross-section view, where horizontal conductors extend into a collector plate at different lengths and further seen from one side, the element having a vertical current outlet,
- Fig. 3 discloses a top-side view of the same cathode element as shown in Fig. 2,
- Fig. 4 discloses an alternative embodiment of a cathode element without a vertical current outlet, where horizontal conductors extend into the collector plate at different lengths,
- Fig. 5 discloses in a top-side part view of a collector plate like in Fig 1 , but the horizontal outlet extends to a delta-shaped conductor inside the plate,
- Fig. 6 discloses in an enlarged view a cross-section through the cathode element of Fig. 2, seen from one end and discloses further details of one vertical current outlet,
- Fig. 7 discloses in an enlarged view an alternative embodiment of the outlet as described in Fig. 6,
- Fig. 8 is a principal sketch showing in a cross sectional view the main parts of a Hall-Heroult cell wherein a cathode element corresponding to that shown in Fig. 2 is included. From Fig. 8 it can be seen a cross sectional view of the main parts of a Hall-Heroult cell where its superstructure includes alumina/fluoride hoppers, anode stubs, bus bars and feeding devices. Further, a pair of anodes partly covered by a crust is dipped into a liquid bath. Under the liquid bath there is shown a layer of liquid aluminium. The cathode is arranged below the liquid aluminium. The cathode comprises a carbonaceous body 4 arranged onto a collector plate 2. At each end of the collector plate there is arranged horizontal current outlets 5, 5’. It is also disclosed a vertical outlet 7. Various embodiments of cathode elements will be disclosed in more detail in the following.
- Fig. 1 discloses a divided cathode element 1 seen in perspective.
- the collector plate consists of two sections 20, 20’.
- collector plate sections 20, 20’ can be identical or not and will be described accordingly.
- the collector plate section 20’ is provided in this example with six collector elements, 30, 30’ 30”, 30”’, 30””, 30'”” that are in electrical contact with the collector plate section 20’.
- these parts are made out of a steel quality that can easily be welded, and preferably the parts are welded together.
- a cathode block can be rodded to the collector elements, in a similar manner as disclosed in W02009/099335A1.
- the present solution may involve electric conductive particles or a contacting paste.
- the number of collector elements at the collector plate may differ from six as shown, for instance one to seven or even none.
- the horizontal current outlets 50, 51 ; 50’, 5T can be made out of conductors of a good conducting material like copper or copper alloy and further being, at least at its outlet ends, covered by a sheet material 60, 61 ; 60’, 6T, preferably made out of a metal such as steel.
- the horizontal current outlets 50, 51 ; 50’, 5T with their corresponding conductors can be integrated in slots S, S’; S”, S’” made in the corresponding collector plate sections 20; 20’. This integration may be based upon press-fit tolerances or pre-heated plate sections to use thermal expansion for a tight fit. However, any appropriate fixation including welding may be applied.
- the conducting material in the slots may be covered by a protective steel plate on the upper and lower side.
- a flexible sealing rope or stopper plates (not shown) intended to facilitate the rodding of the plate to a carbonaceous body by means of electrically conductive metal particles.
- the outer part of the carbonaceous material closer to the horizontal outlets can preferably be electrically insulated from the cathode plate, for instance 100mm and up to 450mm from the end of the cathode block and inwards to avoid high current densities at the upper surface of the cathode block close to the ends.
- the electric insulation can be asymmetric on each of the ends and also differ between the cathode elements in the cell.
- Fig. 2 it can be seen a second embodiment of a cathode element 1’ in a cross-section view seen from one side, where a carbonaceous body 4 is arranged onto a collector plate 2 which is not divided.
- the collector plate 2 has collector elements, where only one 3 is seen from the side.
- At each end of the collector plate 2 there is arranged horizontal current outlets 5, 5’.
- the horizontal current outlets can be made out of a copper material and being covered by a sheet material 6, 6’, preferably made out of a metal such as steel. It is also briefly disclosed a vertical outlet 7, that will be further described with reference to Fig. 6 and 7.
- the cross section of the horizontal outlets may be different at one end of the plate versus the other to compensate for different electric current path lengths of the conducting busbars to the next cell, e.g. for side-by-side arranged cells in a row of plural cells.
- the outlets on the upstream side could have a larger cross-section - either by a greater width or height or both - to reduce the electric resistance on that side of the cell and thus equalize the current distribution into the top of the cathode block surface. If the conductors of the horizontal outlets are of a better conducting material than the plate, they can be applied with different insertion length on each side of the plate when appropriate.
- Fig. 3 discloses a top-side view of the same cathode as shown in Fig. 2, with the carbonaceous body 4 laying onto a collector plate 2 with one outlet on each side 5, 5’ covered by sheet material 6, 6’. Further, it is indicated a bore B in the collector plate for insertion of a thermocouple TC.
- the embodiment shown in Fig. 4 relates to the same embodiment as shown in Fig. 2, however without a vertical outlet. It discloses a cathode element 1 in a cross-section view seen from one side, where a carbonaceous body 4 is arranged onto a collector plate 2 which is not divided, see below.
- the plate 2 has collector elements, where only one 3 is seen from the side.
- At each end of the collector plate 2 there is arranged horizontal current outlets 5, 5’.
- the conductors of the horizontal current outlets can be made out of a copper material and being covered by a sheet material 6, 6’, preferably made out of a metal such as steel.
- the dividing line D in the drawing indicates that the extension of the cathode element can be varied, i.e. also the intrusion length of the current conductors 5, 5’ in the plate 2 may vary depending upon the actual design.
- the current conductors may in principle have a rectangular or round cross-section and as an alternative be out of any suitable electrical current conducting material.
- Fig.5 discloses partly one end of a collector plate 2 or similarly a collector plate section that may have one single horizontal current outlet 5 at its end which comprises a triangle or delta shaped electric conductor 51 made of copper or similar good conducting material to ensure a better distribution of the currents leaving the plate 2 and entering into the conductor 51 and further to its outlet 5, and by that reducing the electric resistance.
- the conductor 51 can be press-fit inserted into a recess of the plate 2, or attached to it by any appropriate means.
- the conductor could be cast into the recess, by for instance of melt copper. In case there is cast an extension beyond the recess outside the plate, it could be done by applying an appropriate mould or the similar.
- Fig.6 discloses further details of the vertical current outlet 7 as shown in Fig. 2 and represents an enlarged end-view of a cross-section through one end of the cathode of Fig. 2.
- a carbonaceous body 4 is resting onto a collector plate 2 having collector elements 3, 3’, 3”, 3’”, 3””.
- the carbonaceous body has recesses or slots 9, 9‘, 9”, 9’”, 9”” complementary with said collector elements.
- the remaining space between the collector elements and the slots is filled with electric conductive material or particles.
- the collector elements are in this embodiment fixed to a metallic collector plate 2 that collects the current and secures stability.
- the vertical outlet 7 comprises a socket 10 integrated with the collector plate 2 where a rod- shaped current conductor 11 can be attached to the socket 10.
- the conductor 11 can be made of a material with good electric conductivity like copper.
- the socket 10 can be made of a metallic material like steel and welded or press-fit to the collector plate 2.
- the vertical outlet can be placed in the centre of the plate or asymmetric towards one of the horizontal outlets to improve the magnetic field situation or to change the current distribution between horizontal and vertical outlets in a desired way.
- the socket 10 has an internal recess 17’ where an upper part 17 of the current conductor 11 has a shape complementary with said recess 17’ for fixation of said current conductor 11 to the socket 10.
- the upper part 17 of the current conductor 11 can be provided with threads mating corresponding threads in the upper part of the socket 10.
- the fixation can be optionally a press-fit (knock) fixation. Further, in an embodiment or in addition, see Fig.
- the socket 10’ may have internal threads 13’ at its outermost end for receiving a sleeve 12’ with complementary external threads 16’, wherein the sleeve surrounds the current conductor 11’ and where the end of the sleeve abuts an annular flange or ring 14’ at the current rod 11’ for forcing the rod 11’ into the socket 10’ when tightened.
- the current conductor 1 T is preferably made out of copper or an alloy thereof.
- the sleeve 12’ both serves for fixation and protection against reactions of conductor 1 T with liquids or volatiles from the process. Further, it is disclosed a bore B’ for insertion of a thermocouple TC’.
- a threaded bolt can be attached inside the top of the socket (not shown) and the conductor 11 ' is fitted with a corresponding threaded bore to fix the conductor to the socket (similar to that shown in Fig. 6).
- a removable connection of the outlet might be needed to allow for a vertical outlet conductor to be attached after the cathode is placed with a swing-in movement on top of the bottom lining in the cell during installation.
- the whole assembly with the carbonaceous body 4 and the collector plate 2 are tilted somewhat during the filling procedure of the particles, to allow the particles to fill the recess in a smooth and complete manner. Additionally some vibration might be applied to the plate or plate sections for homogeneous filling with the particles.
- the recesses or slots 9 can be made in a green condition of the carbonaceous body by commonly used techniques or in a calcinated condition by commonly available process equipment.
- the geometry of the slots has to fit the plates.
- the electrical conducting solids or particles can be of any appropriate metal such as steel, iron, copper, aluminium etc., or alloys of same.
- the shape of the solids can be spherical, oval or elliptic, flaked, or have any appropriate shape.
- the size and particle distribution may vary. The maximum size will in general be restricted by the width of the space to be filled. A non-homogenous distribution of particle sizes may be convenient to obtain a compact filling as possible, with little space between the particles.
- the applied material should have good mechanical properties (crushing properties) and be able to sustain high temperatures.
- magnetic properties may be advantageous.
- the size of said solids can be from 0,1 millimetres and close to the minimum opening between the carbonaceous body and conductor plate. Commonly, the size may be up to 2 millimetres.
- thermocouples attached to or inserted into the cathode plate to monitor the temperature in the cathode.
- holes up to the center of the plate can be drilled in the cathode plate at appropriate locations for reception of thermocouples.
- the steel plate creates a protective housing for the thermocouples to survive the chemical aggressive environment during operation.
- the insertion length of the horizontal outlets can preferably be limited in that it does not cover the central part of the cathode plate.
- the length of the insertion can for example be designed to reflect the existence of vertical outlets in that plate, and the path length of the current through the conductors to the next cell.
- the length of the insertion can be made longer on the upstream side to balance the current pick-up in the cathode block to be more balanced.
- Each cathode element can be fitted with horizontal outlets only for instance for end-to-end arranged cells or when there is no space for busbars under the cell, or with several horizontal outlets and one vertical outlet. To optimize the magnetic field, a configuration with one or two vertical outlets only and no horizontal outlet can be possible as well.
- a combination of different plate configurations can be applied in one cell to create a favourable magnetic field from the electric current distribution or enhance the thermal properties of the cell by reducing the number of outlets where a heat loss is undesired, e.g. on the short ends of the cell which tend to be colder due to the nearby corners.
- Vertical outlets attached to only some plates can be beneficial to optimize the current flow and magnetic field. This may as well reduce the costs of the installation when the current distribution and magnetohydrodynamic stability of the cell is sufficient.
- the cathode voltage drop (CVD) is significantly lower due to the number of outlets, material electric properties, better electric contact due to initial mobility of particles, total surface of contact resistance and shorter current paths from the existence of vertical outlets
- the current distribution into the top cathode block surface is more homogeneous due to the plate geometry, conductance of insertions, and existence of vertical outlets, thus avoiding undesired, instability causing horizontal currents in the liquid aluminium pad above the cathode block surface.
- the higher stability of the cell can be used to reduce the cell voltage and energy consumption further or increase the amperage and production volume
- the vertical space usage of the arrangement is less than with conventional design, thus allowing for a lower cathode shell or - if the shell height is kept, to use the extra space for better bottom insulation, higher and longer-lasting cathode blocks, or more height for liquid aluminium or bath
- the design has a better ratio of electric to thermal conductivity at the most critical locations of high current density and heat flow, thus improving the energy efficiency of the cell (less heat loss and lower cathode voltage drop CVD)
- thermocouples Easier installation of thermocouples inside the plate due to less deep drilling than in collector bars, or direct access from bottom side
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/959,263 US20200332427A1 (en) | 2018-03-14 | 2019-03-04 | Cathode elements for a hall-héroult cell for aluminium production and a cell of this type having such elements installed |
EA202092170A EA202092170A1 (en) | 2018-03-14 | 2019-03-04 | CATHODE ELEMENTS FOR A HOLLA-EROU CELL FOR PRODUCING ALUMINUM AND A CELL OF THIS TYPE HAVING SUCH INSTALLED ELEMENTS |
BR112020015021-5A BR112020015021A2 (en) | 2018-03-14 | 2019-03-04 | CATHOLIC ELEMENT, E, HALL-HÉROULT TYPE ELECTROLYSIS CELL. |
AU2019235250A AU2019235250B2 (en) | 2018-03-14 | 2019-03-04 | Cathode elements for a Hall-Heroult cell for aluminium production and a cell of this type having such elements installed |
NZ765670A NZ765670A (en) | 2018-03-14 | 2019-03-04 | Cathode elements for a hall-héroult cell for aluminium production and a cell of this type having such elements installed |
EP19710349.2A EP3765656A1 (en) | 2018-03-14 | 2019-03-04 | Cathode elements for a hall-héroult cell for aluminium production and a cell of this type having such elements installed |
CA3087116A CA3087116A1 (en) | 2018-03-14 | 2019-03-04 | Cathode elements for a hall-heroult cell for aluminium production and a cell of this type having such elements installed |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NONO20180369 | 2018-03-14 | ||
NO20180369A NO20180369A1 (en) | 2018-03-14 | 2018-03-14 | Cathode elements for a Hall-Héroult cell for aluminium production and a cell of this type having such elements installed |
Publications (1)
Publication Number | Publication Date |
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WO2019174948A1 true WO2019174948A1 (en) | 2019-09-19 |
Family
ID=65729322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2019/055300 WO2019174948A1 (en) | 2018-03-14 | 2019-03-04 | Cathode elements for a hall-héroult cell for aluminium production and a cell of this type having such elements installed |
Country Status (9)
Country | Link |
---|---|
US (1) | US20200332427A1 (en) |
EP (1) | EP3765656A1 (en) |
AU (1) | AU2019235250B2 (en) |
BR (1) | BR112020015021A2 (en) |
CA (1) | CA3087116A1 (en) |
EA (1) | EA202092170A1 (en) |
NO (1) | NO20180369A1 (en) |
NZ (1) | NZ765670A (en) |
WO (1) | WO2019174948A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021213672A1 (en) * | 2020-04-24 | 2021-10-28 | Norsk Hydro Asa | Cathode assembly for a hall-heroult cell for aluminium production and method for making same |
WO2021219222A1 (en) * | 2020-04-30 | 2021-11-04 | Norsk Hydro Asa | Cathode blocks for aluminium electroysis and a method for producing same |
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US6113756A (en) * | 1996-06-18 | 2000-09-05 | Comalco Aluminium Limited | Cathode construction |
WO2009099335A1 (en) | 2008-02-06 | 2009-08-13 | Norsk Hydro Asa | Electrode and a method for making same |
US20170350028A1 (en) * | 2014-12-23 | 2017-12-07 | Norsk Hydro Asa | A modified electrolysis cell and a method for modifying same |
WO2018019910A1 (en) * | 2016-07-26 | 2018-02-01 | Sgl Cfl Ce Gmbh | Cathode assembly for the production of aluminum |
WO2018019888A1 (en) * | 2016-07-26 | 2018-02-01 | Sgl Cfl Ce Gmbh | Cathode current collector/connector for a hall-heroult cell |
Family Cites Families (4)
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US3434957A (en) * | 1966-02-18 | 1969-03-25 | Arthur F Johnson | Aluminum reduction cell with aluminum and refractory layered bottom construction |
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2019
- 2019-03-04 BR BR112020015021-5A patent/BR112020015021A2/en unknown
- 2019-03-04 US US16/959,263 patent/US20200332427A1/en active Pending
- 2019-03-04 AU AU2019235250A patent/AU2019235250B2/en active Active
- 2019-03-04 CA CA3087116A patent/CA3087116A1/en active Pending
- 2019-03-04 EA EA202092170A patent/EA202092170A1/en unknown
- 2019-03-04 WO PCT/EP2019/055300 patent/WO2019174948A1/en active Application Filing
- 2019-03-04 EP EP19710349.2A patent/EP3765656A1/en active Pending
- 2019-03-04 NZ NZ765670A patent/NZ765670A/en unknown
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WO2021213672A1 (en) * | 2020-04-24 | 2021-10-28 | Norsk Hydro Asa | Cathode assembly for a hall-heroult cell for aluminium production and method for making same |
WO2021219222A1 (en) * | 2020-04-30 | 2021-11-04 | Norsk Hydro Asa | Cathode blocks for aluminium electroysis and a method for producing same |
Also Published As
Publication number | Publication date |
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EA202092170A1 (en) | 2021-01-19 |
BR112020015021A2 (en) | 2021-01-19 |
NO20180369A1 (en) | 2019-09-16 |
NZ765670A (en) | 2023-03-31 |
CA3087116A1 (en) | 2019-09-19 |
AU2019235250A1 (en) | 2020-07-09 |
US20200332427A1 (en) | 2020-10-22 |
EP3765656A1 (en) | 2021-01-20 |
AU2019235250B2 (en) | 2023-11-23 |
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