CN113195792B - Anode assembly and related manufacturing method - Google Patents
Anode assembly and related manufacturing method Download PDFInfo
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- CN113195792B CN113195792B CN201980083098.2A CN201980083098A CN113195792B CN 113195792 B CN113195792 B CN 113195792B CN 201980083098 A CN201980083098 A CN 201980083098A CN 113195792 B CN113195792 B CN 113195792B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 86
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003566 sealing material Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000000295 complement effect Effects 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 229910001610 cryolite Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000003313 weakening effect 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
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
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
本发明涉及一种阳极组件(10)的制造方法(100)，该阳极组件被设计为用于通过电解作用生产铝的池，所述阳极组件(10)包括：阳极棒(1)；金属块(2)，所述金属块固定至所述阳极棒(1)的其中一个端部(11)，所述金属块(2)在热作用下能够在纵向方向上膨胀；碳质阳极(3)，所述碳质阳极(3)包括凹部(30)和密封区域(41)，在所述凹部中容纳所述金属块(2)用于将所述金属块(2)密封在所述碳质阳极(3)处，所述密封区域填充有在所述金属块(2)和所述碳质阳极(3)之间延伸的密封材料，其特征在于所述方法(100)包括在所述碳质阳极(3)内部形成至少第一腔(42)的步骤(102)，所述至少第一腔(42)与所述凹部(30)一起形成所述碳质阳极(3)内部的第一减小厚度区域(43)，所述第一减小厚度区域(43)能够在所述金属块(2)的纵向方向上的膨胀作用下变形或断裂。
The invention relates to a method (100) for manufacturing an anode assembly (10) designed for a cell for producing aluminum by electrolysis, the anode assembly (10) comprising: an anode rod (1); a metal block (2) fixed to one of the ends (11) of the anode rod (1), the metal block (2) being able to expand in a longitudinal direction under the action of heat; a carbonaceous anode (3), the carbonaceous anode (3) comprising a recess (30) and a sealing area (41) in which the metal block (2) is accommodated for sealing the metal block (2) The carbon anode (3) is sealed, and the sealing area is filled with a sealing material extending between the metal block (2) and the carbon anode (3), characterized in that the method (100) includes a step (102) of forming at least a first cavity (42) inside the carbon anode (3), and the at least first cavity (42) together with the recess (30) forms a first reduced thickness area (43) inside the carbon anode (3), and the first reduced thickness area (43) can be deformed or broken under the expansion effect of the metal block (2) in the longitudinal direction.
Description
Technical Field
The present invention relates to an anode assembly for a cell designed to produce aluminum by electrolysis, and a method of manufacturing such an anode assembly.
The invention is particularly suitable for electrolytic cells with prebaked anodes.
Background
Aluminum is produced primarily by electrolysis of alumina dissolved in cryolite baths. The cell allowing this operation is constituted by a steel box and is internally lined with refractory insulating products.
The cathode formed from the carbonaceous mass is placed in a tank. It is covered by an anode or a plurality of carbonaceous anodes or carbonaceous anode blocks inserted into a cryolite bath. The carbonaceous anode(s) are gradually oxidized by oxygen generated by the decomposition of alumina.
The current flow is from anode to cathode through a cryolite bath maintained in a liquid state by the joule effect.
The cell typically operates at a temperature between 930 ℃ and 980 ℃ and the aluminum produced is liquid and is deposited on the cathode by gravity. Periodically, the produced aluminum or a portion of the produced aluminum is extracted by a ladle and transferred to a casting furnace. Once the anodes are exhausted, they are replaced with new anodes.
To allow for processing and powering thereof, each anode is typically associated with a structure to form an anode assembly. This structure generally consists of:
anode rod made of a material with high electrical conductivity (such as aluminium or copper), and
Connection means made of a material resistant to the elevated temperatures encountered when using the anode, such as steel.
The connection means generally comprise a multi-foot member (multipode) shaped as an integral cross-bar, located at the base of a bar associated with a plurality of advantageous cylindrical blocks, the axis of which is parallel to the bar.
The block is partially introduced into a recess formed on the upper surface of the anode, and the gap existing between the block and the recess is filled by casting molten metal (typically cast iron). The metal cylinder thus manufactured can ensure a good mechanical fastening and a good electrical connection between the rod and the anode.
However, it has been found in the prior art that the presence of the block causes ohmic drop in the anode connection, as well as heat loss through the anode assembly.
Document WO 2012/100340 therefore proposes an anode assembly in which the assembly consisting of a cross bar and a block is replaced by a longitudinal connecting rod. The connecting rod is introduced into a longitudinal recess formed on the upper surface of the anode at the time of sealing. Molten cast iron is then deposited on the periphery of the connecting rod to fill the space between the connecting rod and the recess.
This solution can improve the current distribution in the anode, reduce ohmic drop at the contact between carbon and cast iron and limit heat loss, as already taught in document FR 1,326,481, which proposes a solution identical to WO 2012/100340.
However, if the prior art anode assembly preferably comprises a cylindrical block, it is mainly intended to limit the risk of anode degradation due to the expansion undergone by the connection means during introduction of the anode into the cryolite bath at a temperature between 930 ℃ and 980 ℃.
In fact, unlike the expansion of the cylindrical block, which results in the application of radial thermal expansion forces on the anode, the thermal expansion of the metal rod results in the application of lateral and longitudinal forces on the anode, which may fracture the anode.
No solution to this cracking problem is proposed in FR 1,326,481 or WO 2012/100340.
In document WO 2015/110906 a solution to this problem of rupture is proposed. The solution consists in providing at least one space without sealing material at one of the longitudinal ends of the connecting rod, said space being advantageously capable of being lined with a compressible filler material, such as refractory fibers. Thus, during expansion of the connecting rod, the refractory fibers absorb the forces exerted longitudinally by the connecting rod, preventing cracking in the anode under the forces. However, a disadvantage of this solution is the need to manually place the refractory fibers before the sealing material is poured. Thus, this increases the cost and manufacturing time. Furthermore, once the electrolysis is performed, the refractory fibers must be removed from the anode assembly in order to be able to recover the carbon. This operation also increases the cost and recovery time.
It is an object of the invention to propose a manufacturing method which is less costly and less complex than the method proposed in document WO 2015/110906. This manufacturing method for forming the anode assembly has a lower risk of anode rupture under the effect of thermal expansion of the connecting rod.
It is a further object of the present invention to provide an anode assembly obtainable by said manufacturing method.
Disclosure of Invention
To this end, the invention proposes a method for manufacturing an anode assembly for a cell for producing aluminium by electrolysis, comprising: an anode rod; a metal block fixed to one of the end portions of the anode rod, the metal block being expandable in a longitudinal direction under the effect of heat; a carbonaceous anode comprising a recess in which the metal block is accommodated for sealing the metal block at the carbonaceous anode and a sealing area filled with a sealing material extending between the metal block and the carbonaceous anode, characterized in that the method comprises the step of forming at least a first cavity inside the carbonaceous anode, said at least a first cavity forming together with the recess a first reduced thickness area inside the carbonaceous anode, said first reduced thickness area being deformable or breakable under the effect of expansion of the metal block in the longitudinal direction.
So configured, the manufacturing method according to the present invention makes it possible to form an anode assembly that presents a lower risk of cracking of the carbonaceous anode under the effect of the expansion of the metal mass.
In fact, a portion of the force applied to the anode during expansion of the metal mass in its longitudinal direction is absorbed by the reduced thickness region and the cavity.
Advantageously, the method of the invention may further comprise the step of forming at least a second cavity inside the carbonaceous anode, said at least second cavity forming, together with the recess, a second reduced thickness region inside the carbonaceous anode, said second reduced thickness region being deformable or breakable under the effect of expansion in the longitudinal direction of the metal block.
In an alternative embodiment, the metal block has a substantially parallelepiped shape, in particular defined by four longitudinal surfaces, connected by two transverse surfaces, the at least first reduced thickness region and the respective at least second reduced thickness region being placed parallel to one of the transverse surfaces and separated from that transverse surface by the sealing region.
Where the anode assembly comprises two reduced thickness regions, each reduced thickness region will advantageously extend to a respective longitudinal end of the metal block. The areas of reduced thickness will then be distributed on both sides of the anode rod, which will allow for a better distribution of the strength of the forces during expansion on the one hand and a better balancing of the mass of the anode assembly on the other hand.
In a variant of embodiment, the step of forming said at least first cavity, and correspondingly said at least second cavity, may comprise the steps of: the insert is placed in a mold for forming the carbonaceous anode so as to define at least one protruding portion inside the mold, the protruding portion being designed to form the at least first cavity and, correspondingly, the at least second cavity.
In another variation of the embodiment, the step of forming the at least first cavity, and correspondingly the at least second cavity, may comprise the step of machining the carbonaceous anode.
The invention also relates to an anode assembly for a cell for producing aluminium by electrolysis, said anode assembly comprising: an anode rod; a metal block fixed to one of the end portions of the anode rod, the metal block being expandable in a longitudinal direction under the effect of heat; a carbonaceous anode comprising a recess in which the metal block is accommodated for sealing the metal block at the carbonaceous anode and a sealing area filled with a sealing material extending between the metal block and the carbonaceous anode, characterized in that the carbonaceous anode comprises at least a first cavity forming together with the recess a first reduced thickness area inside the carbonaceous anode, the first reduced thickness area being deformable or breakable under the effect of expansion of the metal block in the longitudinal direction.
Preferred but non-limiting aspects of the anode assembly are as follows:
-the carbonaceous anode comprises at least a second cavity forming with the recess a second reduced thickness region inside the carbonaceous anode, the second reduced thickness region being deformable or breakable under the effect of expansion in the longitudinal direction of the metal block;
-said metal block has a substantially parallelepiped shape, in particular defined by four longitudinal surfaces, connected by two transversal surfaces, said at least first reduced thickness region and corresponding said at least second reduced thickness region being placed parallel to one of said transversal surfaces and separated from this transversal surface by said sealing region;
the first and respective second cavities protrude laterally and vertically from the longitudinal projection of the lateral inner side wall of the recess, beyond preferably less than 5cm;
-said first reduced thickness region and respective said at least second reduced thickness region have a substantially flat profile and are oriented perpendicular to said longitudinal direction;
-said first reduced thickness region and corresponding said at least second reduced thickness region have a three-part profile, i.e. a central portion surrounded by two end portions, said central portion being substantially flat and oriented perpendicular to said longitudinal direction and said end portions being oriented obliquely with respect to said central portion;
-said first reduced thickness region and corresponding said at least second reduced thickness region have a two-part profile, i.e. a first part and a second part connected to each other at an attachment region, each of said first and second parts having a double cam profile, and wherein said first reduced thickness region and corresponding said at least second reduced thickness region have a smaller thickness at said attachment region;
-said first reduced thickness region and corresponding said at least second reduced thickness region have a two-part profile, i.e. a first part and a second part connected to each other at an attachment region, each of said first and second parts having a flat profile, and wherein said first reduced thickness region and corresponding said at least second reduced thickness region have a smaller thickness at said attachment region;
-said first reduced thickness region and corresponding said at least second reduced thickness region have a two-part profile, i.e. a first part and a second part connected to each other at an attachment region, each of said first and second parts having a flat double cam profile, and wherein said first reduced thickness region and corresponding said at least second reduced thickness region have a smaller thickness at said attachment region.
Drawings
Other advantages and features of the anode assembly and of the relative manufacturing method will emerge from the description of several alternative embodiments given below by way of non-limiting example, in which:
figure 1 is a perspective view of an anode assembly according to a first variant of an embodiment of the invention,
Figure 2 is a perspective view of a metal block attached to an anode rod prior to integration of the metal block into the anode assembly shown in figure 1,
Figure 3 is a perspective view of a carbonaceous anode used to manufacture the anode assembly shown in figure 1,
Figure 4 is a top view of an anode assembly according to a second variant of an embodiment of the invention,
Figure 5 is a cross-sectional view taken along CC' of the anode assembly shown in figure 4,
Figure 6 figures 6a to 6e are partial views of several variations of embodiments of the present invention,
Fig. 7 is a block diagram of a method of manufacturing an anode assembly according to the present invention.
Detailed Description
Embodiments of a method of manufacturing an anode assembly and embodiments of an anode assembly obtained from the process will now be described. In these different drawings, identical elements have the same numerical designation.
In the remainder of the text, the terms "side surface", "lower surface", "upper surface", "side wall" and "bottom" will be used with reference to an anode rod extending along the A-A' axis.
The reader will understand that, in the context of the present invention:
"lower surface" or "upper surface" means a surface extending in a plane perpendicular to the A-A' axis, the upper surface of a given piece being closer to the anode rod than the lower surface,
"Surface/side wall" means a surface/wall extending in a plane parallel to the A-A' axis of the anode rod,
"Surface/longitudinal wall" means a surface/wall extending parallel to the longitudinal axis of a longitudinal object (such as a recess or a metal block),
"Surface/transverse wall" means a surface/wall extending perpendicular to the longitudinal axis of the longitudinal object,
"Longitudinal direction" or "longitudinally" means a direction parallel to the longitudinal axis of a longitudinal object (e.g. a recess or a metal block),
By "outer wall" or "inner wall" of the cavity is meant the wall furthest or closest to the A-A' axis, respectively.
Fig. 1 illustrates one embodiment of an anode assembly according to the present invention. Referring to fig. 1 to 3, an anode assembly 10 includes an anode rod 1, a metal block 2, and a carbonaceous anode 3.
The anode rod 1 is made of an electrically conductive material. It extends along the A-A' axis. Anode rods are of a type conventionally known to those skilled in the art and will not be described in more detail below.
The metal block 2 forms the connecting means. The metal block 2 is made of an electrically conductive material capable of withstanding the high service temperatures of the anode assembly. For example, the metal block is made of steel.
The dimensions of the metal block 2 may be as follows:
the length L is between 80 cm and 200 cm,
The width I and the height h are between 5 cm and 50 cm.
In all cases, the length L is at least twice the width I of the metal block 2.
The metal block 2 is integral with the anode rod 1 at one of the ends 11 of the anode rod 1 and extends along a longitudinal B-B 'axis perpendicular to the A-A' axis. The metal block 2 includes an upper surface 23 in contact with the anode rod 1, a lower surface 24 opposite to the upper surface 23, two longitudinal side surfaces 22, and two lateral side surfaces 21. The metal block 2 is for example a rod, possibly having a cuboid shape, and may comprise teeth on its side surfaces 21, 22 and/or its lower surface 24, in particular having a rounded shape.
The anode 3 is an anode block made of a pre-baked carbon material, the composition and general form of which are known to those skilled in the art and will not be described in more detail later. The upper surface of the anode 3 has a recess 30 in which the metal block 2 is accommodated.
Advantageously, the recess 30 may have a shape complementary to the shape of the metal block 2. In this case, the recess 30 has a longitudinal inner side wall 32, a transverse inner side wall 31 and a bottom 34.
The width I' of the recess or groove is greater than the width I of the metal block 2 to allow insertion of the metal block 2.
The anode assembly further comprises a sealing region filled with a sealing material 41. The sealing region extends between the longitudinal inner wall 32 of the recess 30 and the longitudinal side surface 22 of the metal block 2.
In the context of the present invention, the term "sealing material" is intended to mean a material that allows for the formation of a rigid and electrically conductive connection between the anode and the metal block, which connection is typically provided by cast metal (such as cast iron) or an electrically conductive glue between the metal block and the anode.
As shown in fig. 1, the sealing material 41 covers all side surfaces 21, 22 of the metal block 2. The force exerted by the metal block 2 longitudinally during its expansion will thus be transmitted integrally to the anode 3 through the sealing region 41 adjacent to the lateral side surface 21 of the metal block 2.
In fact, we have to remember, as a guide, that a steel metal block of length equal to 1 meter can undergo a longitudinal expansion of up to 2 cm at 1000 ℃. Such longitudinal expansion may potentially cause very significant degradation (cracking, explosion, etc.) of the anode 3.
In order to avoid such degradation of the anode 3 under the action of said longitudinal forces, the anode 3 is advantageously provided with a pair of cavities 42 placed on either side of the recess 30 along the longitudinal B-B' axis, each cavity 42 being located in the vicinity of a sealing area 41 adjacent to one of the lateral side surfaces 21 of the metal block 2. So placed, each cavity 42 forms, together with the recess 30, a reduced thickness region 43 in the anode 3, said reduced thickness region 43 being located between said sealing region 41 and said cavity 42. In particular, the reduced thickness region 43 will be configured to be capable of deforming or breaking under the force applied longitudinally by the metal block 2.
The thickness of the region of minimum thickness 43 is advantageously less than 5cm and preferably between 0.5cm and 3cm to be able to deform or fracture without spreading the fracture in the rest of the anode. The cavity 42 will advantageously have a thickness greater than 0.5cm and preferably greater than 1cm, so as to be able to absorb the deformations of the thickness of the reduced thickness region 43 caused by the expansion of the metal block 2.
Thus, during expansion of the metal block 2, the force exerted by the metal block 2 in the longitudinal direction will advantageously be transferred first to the reduced thickness region 43, which will cause said reduced thickness region 43 to deform or fracture. Since the rest of the anode 3, in particular the part of the anode 3 between one of the side edges 33 of the anode 3 and the outer wall of the cavity 42 closest to that side edge, is not directly subjected to all forces exerted longitudinally by the metal block, the risk of degradation is greatly reduced.
Referring to fig. 4 and 5, another embodiment of an anode assembly is illustrated in top view and cross-sectional view along C-C', respectively.
In this variant embodiment, the anode 3 has only one cavity 42, which, together with the recess 30, defines a single reduced thickness region 43. However, this reduced thickness region 43 will be sufficient to limit the risk of damaging the whole anode 3.
Regardless of the embodiment, the anode 3 comprises at least one cavity 42 spaced apart from the recess 30, such that a reduced thickness region 43 of the anode 3 is formed between said at least one cavity 42 and said recess 30. Thus, the anode 3 comprises at least one reduced thickness region 43. The reduced thickness region 43 is a structure of the anode 3 that is capable of deforming or breaking under the expansion of the metal mass, for example, in the longitudinal direction.
As can be seen in fig. 4 and 5, the cavity 42 extends laterally and vertically beyond the longitudinal projection of the inner lateral side wall 31. This configuration allows the collapse of the fracture within the cavity 42 to subside, extending from the lateral inner sidewall in a generally longitudinal direction, slightly away from the C-C' axis. Said excess is advantageously less than 5cm and preferably less than 3cm to avoid weakening the anode 3 and disturbing the distribution of the current throughout the lower surface of the anode 3.
The shape of the reduced thickness region 43, the cavity 42 and the recess 30 may vary depending on various parameters, such as in particular the constituent material, size and/or shape of the anode 3 and/or the metal block 2. In particular, in certain embodiments, the shape of the minimum thickness region 43 may include at least one fracture interface of the anode 3 configured to enable the reduced thickness region 43 to fracture at the at least one fracture interface, for example, under a given stress generated by expansion of the metal mass. Such a fracture interface may abut the concave surface of recess 30 or cavity 42. The concave surface may be curved, that is to say define a curve (as at the end of the cavity 42 of fig. 6 a). Such a concave curve may be configured to a greater or lesser extent so that the effect of stress concentration in the region of minimum thickness 43 may be of greater or lesser importance. The concave surface may also be angled, i.e. defining an angle between two parts of the concave surface (as at the end of the cavity 42 of fig. 6 b). The angle of such a concavity may be configured to a greater or lesser extent so that the effect of stress concentration in the region of minimum thickness 43 may be of greater or lesser importance.
Referring to fig. 6a to 6e, several advantageous embodiments of anodes 3 that may be used in the anode assembly of the invention are shown.
In the embodiment shown in fig. 6a, the reduced thickness region 43 has a substantially flat profile and is oriented perpendicularly towards the B-B' axis of the metal block 2. The lateral inner side walls 31 of the recess 30 adjacent to the reduced thickness region 43 and the inner and outer walls of the corresponding cavity 42 have in this case a straight profile and are perpendicular to the B-B' axis.
In the embodiment shown in fig. 6b, the reduced thickness region 43 has a profile in two parts, namely a first part 434 and a second part 435, which are connected to each other at an attachment region 430. Each of the portions 434, 435 has a double convex profile and the reduced thickness region 43 has a smaller thickness at the attachment region 430. The lateral inner side walls 31 of the recess 30 adjacent to the reduced thickness region 43 have in this case a curved profile, complementary to the profile of the reduced thickness region 43, and the inner walls of the corresponding cavities 42 also have a curved profile, complementary to the profile of the reduced thickness region 43.
In the embodiment shown in fig. 6c, the reduced thickness region 43 has a two-part profile, namely a first part 436 and a second part 437 connected to each other at the attachment region 430. Each of the portions 436, 437 has a generally flat profile, and the reduced thickness region 43 has a smaller thickness at the attachment region 430. The lateral inner side walls 31 of the recess 30 adjacent to the reduced thickness region 43 and the inner walls of the corresponding cavity 42 are in this case substantially straight in profile and perpendicular to the B-B' axis, except for their respective regions aligned with the attachment regions 430, whereby the profile is substantially triangular.
In the embodiment shown in fig. 6d, the reduced thickness region 43 has a three-part contour, i.e. a central portion 431 is surrounded by two end portions 432 and 433. The central portion 431 is generally planar and oriented perpendicular to the B-B' axis, and the end portions 432 and 433 are oriented obliquely relative to the central portion 431. The lateral inner side walls 31 of the recess 30 adjacent to the reduced thickness region 43 have in this case a straight profile perpendicular to the B-B' axis, and the inner and outer walls of the corresponding cavity 42 have a profile substantially complementary to the profile of the reduced thickness region 43.
In the embodiment shown in fig. 6e, the reduced thickness region 43 has a two-part profile, i.e. a first part 438 and a second part 439 connected to each other at the attachment region 430. Each of the portions 438, 439 has a flat double convex profile and the reduced thickness region 43 has a smaller thickness at the attachment region 430. The lateral inner side walls 31 of the recess 30 adjacent to the reduced thickness region 43 have in this case a curved profile, complementary to the profile of the reduced thickness region 43, and the inner walls of the corresponding cavities 42 also have a curved profile, complementary to the profile of the reduced thickness region 43. Cavity 42 thus has a gull-wing profile in this case.
An embodiment of a method of manufacturing an anode assembly according to the present invention will now be described with reference to fig. 7.
The manufacturing method 100 may be applied to form an anode assembly 10 having an anode 3 with a single reduced thickness region 43 adjacent one of the lateral inner side walls 31 of the recess 30.
As a variant, the manufacturing method 100 can also be applied to form an anode assembly 10 whose anode 3 has two reduced thickness regions 43 placed on both sides of the recess 30, each reduced thickness region 43 being adjacent to one of the lateral inner side walls 31 of the recess 30.
In a first step 101 of the manufacturing method 100, a metal block 2 fixed to the anode rod 1 is provided.
In a second step 102, a carbonaceous anode 3 provided with recesses 30 and at least one cavity 42 is formed. In a first variant of the method, the second step 102 may comprise, before the moulding step of the carbonaceous anode 3, the steps of: the insert is placed in a mold intended to form the carbonaceous anode 3 to define at least one protruding portion within the mold, the protruding portion intended to be used to form the at least one cavity 42.
In a second variant of the method, the second step 102 may comprise a step of moulding the carbonaceous anode 3, followed by a step of machining the carbonaceous anode 3 to form the at least one cavity 42.
In a third step 103, the metal block 2 is introduced into the recess 30, and the gap separating the metal block 2 from the anode 3 is filled with a sealing material to form the sealing region 41.
Thus, the anode assembly 10 according to the present invention is obtained by a method that is easily adaptable to industry. So formed, the anode assembly 10 may make it possible to limit the risk of cracking and/or bursting of the anode 3 when the anode 3 is introduced into a cryolite bath.
Claims (15)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR18/73580 | 2018-12-20 | ||
| FR1873580A FR3090699B1 (en) | 2018-12-20 | 2018-12-20 | Anode assembly and associated manufacturing process |
| PCT/CA2019/051794 WO2020124209A1 (en) | 2018-12-20 | 2019-12-12 | Anode assembly and associated manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113195792A CN113195792A (en) | 2021-07-30 |
| CN113195792B true CN113195792B (en) | 2024-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980083098.2A Active CN113195792B (en) | 2018-12-20 | 2019-12-12 | Anode assembly and related manufacturing method |
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| Country | Link |
|---|---|
| EP (1) | EP3899105A4 (en) |
| CN (1) | CN113195792B (en) |
| AR (1) | AR117450A1 (en) |
| AU (1) | AU2019407845B2 (en) |
| CA (1) | CA3122504A1 (en) |
| FR (1) | FR3090699B1 (en) |
| WO (1) | WO2020124209A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202139303U (en) * | 2011-07-16 | 2012-02-08 | 冯乃祥 | Anodal carbon block of aluminum electrolysis bath |
| CN105934539A (en) * | 2014-01-27 | 2016-09-07 | 力拓艾尔坎国际有限公司 | Anode assembly and associated production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1326481A (en) | 1962-03-27 | 1963-05-10 | Pechiney Prod Chimiques Sa | improved carbon-based electrode |
| CH606496A5 (en) * | 1976-06-16 | 1978-10-31 | Alusuisse | |
| FR2884833B1 (en) * | 2005-04-20 | 2007-05-25 | Ecl Soc Par Actions Simplifiee | DEVICE AND METHOD FOR MAINTAINING AND CONNECTING AN ANODE ROD ON ANODIC FRAME OF AN ALUMINUM ELECTROLISE CELL |
| WO2012100340A1 (en) | 2011-01-28 | 2012-08-02 | UNIVERSITé LAVAL | Anode and connector for a hall-heroult industrial cell |
| CN201971907U (en) * | 2011-02-17 | 2011-09-14 | 湖南晟通科技集团有限公司 | Anode carbon bowl |
| CN103966629A (en) * | 2013-01-25 | 2014-08-06 | 沈阳铝镁设计研究院有限公司 | Anode carbon block group for aluminum electrolysis cell |
| US10151038B2 (en) * | 2013-08-09 | 2018-12-11 | Rio Tinto Alcan International Limited | Electrolytic device and anode assembly intended for the production of aluminium, electrolytic cell and apparatus comprising such a device |
| CN204661834U (en) * | 2015-02-28 | 2015-09-23 | 苏加强 | Electrolytic aluminum anode steel pawl |
| WO2016141475A1 (en) * | 2015-03-08 | 2016-09-15 | Université Du Québec À Chicoutimi | Anode assembly for aluminum electrolysis cells and method for manufacturing anode assemblies |
| GB2536901A (en) * | 2015-03-30 | 2016-10-05 | Dubai Aluminium Pjsc | Cathode block for electrolytic cell suitable for the Hall-Héroult process |
-
2018
- 2018-12-20 FR FR1873580A patent/FR3090699B1/en active Active
-
2019
- 2019-12-12 EP EP19901100.8A patent/EP3899105A4/en active Pending
- 2019-12-12 AU AU2019407845A patent/AU2019407845B2/en active Active
- 2019-12-12 CN CN201980083098.2A patent/CN113195792B/en active Active
- 2019-12-12 CA CA3122504A patent/CA3122504A1/en active Pending
- 2019-12-12 WO PCT/CA2019/051794 patent/WO2020124209A1/en unknown
- 2019-12-19 AR ARP190103771A patent/AR117450A1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202139303U (en) * | 2011-07-16 | 2012-02-08 | 冯乃祥 | Anodal carbon block of aluminum electrolysis bath |
| CN105934539A (en) * | 2014-01-27 | 2016-09-07 | 力拓艾尔坎国际有限公司 | Anode assembly and associated production method |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2019407845A1 (en) | 2021-06-24 |
| CN113195792A (en) | 2021-07-30 |
| EP3899105A1 (en) | 2021-10-27 |
| WO2020124209A1 (en) | 2020-06-25 |
| EP3899105A4 (en) | 2024-07-17 |
| CA3122504A1 (en) | 2020-06-25 |
| AR117450A1 (en) | 2021-08-04 |
| AU2019407845B2 (en) | 2024-09-26 |
| FR3090699B1 (en) | 2021-04-09 |
| FR3090699A1 (en) | 2020-06-26 |
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