CN114540883A - Pouring method for cathode aluminum soft belt of electrolytic cell - Google Patents
Pouring method for cathode aluminum soft belt of electrolytic cell Download PDFInfo
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- CN114540883A CN114540883A CN202210268866.5A CN202210268866A CN114540883A CN 114540883 A CN114540883 A CN 114540883A CN 202210268866 A CN202210268866 A CN 202210268866A CN 114540883 A CN114540883 A CN 114540883A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 224
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 223
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000003892 spreading Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000011449 brick Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 4
- 238000010345 tape casting Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 23
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a casting method of an aluminum soft belt of a cathode of an electrolytic cell, which comprises the following steps: (1) installing a refractory mould at the joint of the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end in butt joint, and enabling the interval between the aluminum soft belt bundles and the cathode steel bar end to be 20-25 mm; (2) loading high-temperature aluminum liquid into an operating electrolytic cell by using a pouring pan, taking the high-temperature aluminum liquid from a pouring pan spoon by using a pouring spoon, pouring the high-temperature aluminum liquid to the interface positioned in the refractory mold, and spreading and covering the high-temperature aluminum liquid to aluminum soft belts at two ends of the interface; (3) layering the aluminum soft belts, and then sequentially pouring the aluminum soft belts layer by layer upwards, wherein the aluminum soft belts at the power feeding end and the cathode steel bar end on the same layer correspond to each other during pouring; the aluminum soft belt to be cast is bent aside; (4) when the molten aluminum is poured to the top aluminum soft belt, the high-temperature molten aluminum completely pours the top plate of the top aluminum soft belt and surrounds the whole joint; (5) and after pouring, cooling and forming, removing the refractory mold, and finishing the pouring and welding of the aluminum soft belt in the electrified state.
Description
Technical Field
The invention relates to the technical field of electrolytic bath electrified maintenance, in particular to a pouring method of an electrolytic bath cathode aluminum soft belt.
Background
With the continuous progress and development of the technology, the nonferrous metal electrolytic aluminum industry is also continuously changed, small electrolytic tanks are eliminated to be gradually built in large electrolytic tanks, the productivity is improved, the energy consumption is reduced, and environmental protection is emphasized, such as electrolytic tanks of 420KA, 500KA, 600KA and the like.
With the increase of large-scale electrolytic cells, under the normal working state of the electrolytic cells, the larger the direct current is introduced into the aluminum bus, the larger the magnetic field generated around each conductor (such as a column, a cathode bus and the like) of the electrolytic cells is. When the series production in the electrolytic plant can not be powered off, the welding in the strong magnetic field and the charged state can not meet the requirements of the quality of a plurality of welding seams, even the welding seams can not be welded. Therefore, it is necessary to develop a construction method for a cathode soft belt to solve the existing problems.
Disclosure of Invention
The invention aims to provide a method for pouring soft aluminum belt of a cathode of an electrolytic cell, aiming at the defects of the prior art. The method can ensure that the conductive quality and the voltage drop are better than those of welding, saves time compared with the welding, and is faster in construction progress.
In order to realize the purpose of the invention, the following technical scheme is adopted:
an electrolytic cell cathode aluminum soft belt casting method, comprising;
(1) installing a refractory mould at the joint of the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end, and enabling a gap with the interval of 20-25 mm between the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end;
(2) loading high-temperature aluminum liquid into an operating electrolytic cell by using a pouring pan, taking the high-temperature aluminum liquid from a pouring pan spoon by using a pouring spoon, pouring the high-temperature aluminum liquid to the interface positioned in the refractory mold, and spreading and covering the high-temperature aluminum liquid to aluminum soft belts at two ends of the interface;
(3) dividing the aluminum soft belt into a bottom aluminum soft belt bundle, a middle aluminum soft belt bundle and a top aluminum soft belt bundle, and then sequentially pouring layer by layer upwards, wherein the aluminum soft belt bundles at the power feeding end and the cathode steel bar end on the same layer correspond to each other during pouring; the aluminum soft belt to be cast is bent aside;
(4) when the molten aluminum is poured to the top aluminum soft belt, the high-temperature molten aluminum completely pours the top plate of the top aluminum soft belt and surrounds the whole joint;
(5) and after pouring, cooling and forming, removing the refractory mold, and checking whether a part which is not poured exists at the interface, so as to finish the pouring and welding of the aluminum soft belt of the electrolytic cell.
Further, the bottom layer aluminum soft belt is divided into a bottom layer power feeding end aluminum soft belt and a bottom layer cathode steel bar end aluminum soft belt; the middle-layer aluminum soft belt is divided into a middle-layer power-in end aluminum soft belt and a middle-layer cathode steel bar end aluminum soft belt; the top aluminum soft belt bundle is divided into a top electricity inlet end aluminum soft belt bundle and a top cathode steel bar end aluminum soft belt bundle.
Further, the aluminum soft belt is formed by pressure spot welding a plurality of thin aluminum soft belts together.
Furthermore, the refractory mould comprises two refractory brick moulds which are movably spliced, a pouring groove is formed at the splicing position, one end of the pouring groove is sleeved on the power feeding end aluminum soft belt, and the other end of the pouring groove is sleeved on the cathode steel bar end aluminum soft belt.
Furthermore, an aluminum water tank is arranged on the side surface of the splicing position of the two refractory brick molds.
Further, the depth of the aluminum water tank is 10-15 mm.
Further, the aluminum water tank is of an L-shaped structure.
Furthermore, a notch is formed in one side of the refractory brick mold.
Furthermore, the two refractory brick molds are movably spliced correspondingly at one side provided with the notch, and the two corresponding notches are spliced to form a pouring groove.
Further, the notch is of an L-shaped structure.
Compared with the prior art, the invention has the advantages that:
1. the invention can carry out pouring welding on the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end in a charged state, and can overcome the problems that the aluminum soft belt is charged and cannot be welded and the welding quality is poor in a strong magnetic field; the interface of the power inlet end aluminum soft belt bundle and the cathode steel bar end aluminum soft belt bundle is supported and cast by adopting a refractory mold, the refractory mold is used for wrapping the interface, and the power inlet end aluminum soft belt bundle and the cathode steel bar end aluminum soft belt bundle at the interface can be wrapped and packaged by the cast high-temperature aluminum water; the refractory mould can guide poured high-temperature molten aluminum to flow from one side to the other side through the bottom, so that the high-temperature molten aluminum is integrally wrapped at the joint, and good pouring and welding quality is obtained.
2. The refractory mould is formed by splicing refractory brick moulds, and a pouring groove is formed at the splicing position, one end of the pouring groove is sleeved on the power inlet end aluminum soft belt bundle, and the other end of the pouring groove is sleeved on the cathode steel bar end aluminum soft belt bundle.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a mold device used in the casting method of the cathode aluminum soft belt of the electrolytic cell of the present invention;
FIG. 2 is a schematic structural view of a firebrick mold in accordance with the present invention;
FIG. 3 is a schematic structural diagram of the bottom aluminum tape casting in the invention;
FIG. 4 is a left side view of the structure of FIG. 3;
FIG. 5 is a schematic top view of the structure of FIG. 3;
FIG. 6 is a schematic front view of an aluminum soft belt as an intermediate layer in the present invention;
FIG. 7 is a left side view of the structure of FIG. 6;
FIG. 8 is a schematic top view of the structure of FIG. 6;
FIG. 9 is a schematic structural diagram of the top aluminum soft belt in the invention;
FIG. 10 is a left side view of the structure of FIG. 9;
FIG. 11 is a schematic top view of the structure of FIG. 9;
names and serial numbers of the components in the figure: 1-refractory brick mould, 11-aluminum water tank, 12-casting tank, 13-notch, 2-cast power inlet end aluminum soft belt, 3-cast aluminum water, 4-cast cathode steel bar end aluminum soft belt, 5-to-be-cast power inlet end aluminum soft belt, and 6-to-be-cast cathode steel bar end aluminum soft belt.
Detailed Description
In order to make the technical solutions in the present application better understood, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments in the present application shall fall within the protection scope of the present application.
Example 1:
as shown in fig. 1 to 11, a casting method of an aluminum soft belt for cathode of an electrolytic cell, the casting method comprises;
(1) installing a refractory mould at the joint of the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end, and enabling the interval between the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end to be 20-25 mm;
(2) loading high-temperature aluminum liquid into an operating electrolytic cell by using a pouring pan, taking the high-temperature aluminum liquid from a pouring pan spoon by using a pouring spoon, pouring the high-temperature aluminum liquid to the interface positioned in the refractory mold, and spreading and covering the high-temperature aluminum liquid to aluminum soft belts at two ends of the interface;
(3) dividing the aluminum soft belt into a bottom aluminum soft belt, a middle aluminum soft belt and a top aluminum soft belt, and then sequentially pouring layer by layer upwards, wherein the power inlet end aluminum soft belt and the cathode steel bar end aluminum soft belt on the same layer correspond to each other during pouring; the aluminum soft belt to be cast is bent aside;
(4) when the molten aluminum is poured to the top aluminum soft belt, the high-temperature molten aluminum completely pours the top plate of the top aluminum soft belt and surrounds the whole joint;
(5) and after pouring, cooling and forming, removing the refractory mold, and checking whether a part which is not poured exists at the interface, so as to finish the pouring and welding of the aluminum soft belt of the electrolytic cell.
The interval between the power feeding end aluminum soft belt and the cathode steel bar end aluminum soft belt can be 20, 21, 22, 23, 24 or 25mm and the like. The method can not only be favorable for pouring high-temperature molten aluminum to the interface, but also avoid overlarge thickness of the molten aluminum at the interface, and reduce the influence of the pouring welding position on voltage transmission.
The aluminum soft belt bundles at the power inlet end and the aluminum soft belt bundles at the cathode steel bar end are layered respectively, the aluminum soft belt bundles at the power inlet end on each layer correspond to the aluminum soft belt bundles at the cathode steel bar end, and the aluminum soft belt bundles at the power inlet end on each layer and the aluminum soft belt bundles at the cathode steel bar end have equal height and equal thickness; therefore, the quality of pouring and welding can be better improved, and the influence of the welding joint on the transmission voltage is further reduced.
According to the invention, after layering, pouring and welding are sequentially carried out from the bottom layer to the top layer, so that good pouring and welding can be realized between the power inlet end aluminum soft belt bundle on each layer and the cathode steel bar end aluminum soft belt bundle, and bubbles remained in high-temperature aluminum water during pouring can be prevented.
Example 2:
compared with example 1, the difference is that: in order to better pour the aluminum soft belt bundle at the power feeding end and the aluminum soft belt bundle at the cathode steel bar end, the aluminum soft belt bundle at the power feeding end and the aluminum soft belt bundle at the cathode steel bar end are respectively layered, namely:
the bottom layer aluminum soft belt is divided into a bottom layer power inlet end aluminum soft belt and a bottom layer cathode steel bar end aluminum soft belt; the middle-layer aluminum soft belt is divided into a middle-layer power-in end aluminum soft belt and a middle-layer cathode steel bar end aluminum soft belt; the top aluminum soft belt bundle is divided into a top electricity inlet end aluminum soft belt bundle and a top cathode steel bar end aluminum soft belt bundle.
Example 3:
compared with example 1 or 2, the difference is that: the structural form of the aluminum soft belt is given.
The aluminum soft belt is formed by spot welding a plurality of thin aluminum soft belts together. Generally, the number of thin aluminum soft belts is 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20, and the like.
The plurality of thin aluminum soft belts are spot-welded into bundles, so that the aluminum soft belts can be layered, and can be well fixed, and the deformation of the thin aluminum soft belts caused by high temperature is reduced.
Example 4:
compared with any of the embodiments 1 to 3, the difference is that: the structural form of the refractory brick mould is given.
The refractory mould comprises two refractory brick moulds 1, wherein the two refractory brick moulds 1 are movably spliced, a pouring groove 12 is formed at the splicing position, one end of the pouring groove 12 is sleeved on an aluminum soft belt at a power feeding end, and the other end of the pouring groove 12 is sleeved on an aluminum soft belt at a cathode steel bar end.
Example 5:
compared with example 4, the difference is that: in order to enable high-temperature aluminum water to flow downwards from the side surface of the aluminum soft belt in the refractory mold, an aluminum water tank is additionally arranged.
And the side surface of the splicing position of the two refractory brick moulds 1 is provided with an aluminum water tank 11. The high-temperature aluminum water of pouring is spread from the kneck and is covered all around, and the aluminium water tank can increase the interval between refractory mould and the soft area restraints of aluminium to when can do benefit to the side downward flow of high-temperature aluminum water through the soft area restraints of aluminium, restriction high-temperature aluminum water in the side department of the soft area restraints of aluminium, thereby realize side and the bottom of encapsulation kneck, and then accomplish and weld between the soft area restraints of electricity inlet end aluminium soft area and the soft area restraints of cathode steel stick end aluminium under the electrified state.
Example 6:
compared with example 4, the difference is that: the depth structure of the aluminum water tank is given.
The depth of the aluminum water tank 11 is 10-15 mm. The depth may typically be 10, 11, 12, 13, 14 or 15mm, etc.
Example 7:
compared with example 4, the difference is that: the structural form of the aluminum water tank is given.
The aluminum water tank 11 is of an L-shaped structure. Two firebrick moulds carry out corresponding concatenation in order to set up the one side of aluminium basin, two firebrick moulds splice the back, the side and the bottom of restricting the area to the soft aluminium belt of a company aluminium basin realization are wrapped up to can make the high temperature aluminium water of pouring flow to the bottom from the kneck side, and under the effect of aluminium basin, can make the side of the soft aluminium belt of aluminium belt and the high temperature aluminium water of bottom accumulation certain thickness, and then can do benefit to the encapsulation of the side of the soft aluminium belt and bottom.
High temperature aluminium water can pour into high temperature aluminium water into from the aluminium basin on one side earlier when the pouring, and high temperature aluminium water flows the aluminium basin on another resistant firebrick mould from the aluminium basin on one side to be convenient for outwards release the air in the inslot, can make side and the bottom of better encapsulation aluminium soft area restrainted after the high temperature aluminium water cooling.
Example 8:
the difference compared to example 4 is that: in order to form a pouring groove after splicing two refractory brick molds, a notch is additionally arranged.
And one side of the refractory brick mould is provided with a notch 13. The pouring trough can be formed after the two refractory brick molds are spliced.
Example 9:
compared with example 8, the difference is that: the structural form of splicing the refractory brick mould is given.
And correspondingly and movably splicing one side of the two refractory brick molds with the notch 13, and splicing the two corresponding notches 13 to form a pouring trough 12.
Example 10:
compared with examples 8 or 9, the differences are that: one form of construction of the gap is given.
The notch 13 is in an L-shaped structure. Can be beneficial to forming a pouring groove after splicing two refractory brick moulds. The bottom surface of the notch is inserted into the bottom of a joint of the power feeding end aluminum soft belt and the cathode steel bar end aluminum soft belt, and the side surface of the notch is supported on the power feeding end aluminum soft belt and the cathode steel bar end aluminum soft belt, so that the transverse movement and the downward swinging of the power feeding end aluminum soft belt and the cathode steel bar end aluminum soft belt can be effectively prevented.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (10)
1. The casting method of the cathode aluminum soft belt of the electrolytic cell is characterized in that: the casting method comprises the following steps:
(1) installing a refractory mould at the joint of the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end, and enabling the interval between the aluminum soft belt bundle at the power inlet end and the aluminum soft belt bundle at the cathode steel bar end to be 20-25 mm;
(2) loading high-temperature aluminum liquid into an operating electrolytic cell by using a pouring pan, taking the high-temperature aluminum liquid from a pouring pan spoon by using a pouring spoon, pouring the high-temperature aluminum liquid to the interface positioned in the refractory mold, and spreading and covering the high-temperature aluminum liquid to aluminum soft belts at two ends of the interface;
(3) dividing the aluminum soft belt into a bottom aluminum soft belt bundle, a middle aluminum soft belt bundle and a top aluminum soft belt bundle, and then sequentially pouring layer by layer upwards, wherein the aluminum soft belt bundles at the power feeding end and the cathode steel bar end on the same layer correspond to each other during pouring; the aluminum soft belt to be cast is bent aside;
(4) when the molten aluminum is poured to the top aluminum soft belt, the high-temperature molten aluminum completely pours the top plate of the top aluminum soft belt and surrounds the whole joint;
(5) and after pouring, cooling and forming, removing the refractory mold, and checking whether a part which is not poured exists at the interface, namely finishing the pouring and welding of the aluminum soft belt of the electrolytic cell in an electrified state.
2. The electrolytic cell cathode aluminum soft belt casting method according to claim 1, characterized in that: the bottom layer aluminum soft belt is divided into a bottom layer power inlet end aluminum soft belt and a bottom layer cathode steel bar end aluminum soft belt;
the middle-layer aluminum soft belt is divided into a middle-layer power-in end aluminum soft belt and a middle-layer cathode steel bar end aluminum soft belt;
the top aluminum soft belt bundle is divided into a top electricity inlet end aluminum soft belt bundle and a top cathode steel bar end aluminum soft belt bundle.
3. The electrolytic cell cathode aluminum soft belt casting method according to claim 1, characterized in that: the aluminum soft belt is formed by spot welding a plurality of thin aluminum soft belts together.
4. The method of casting soft aluminum strip for electrolytic cell cathodes of any one of claims 1 to 3, characterized in that: the refractory mould comprises two refractory brick moulds (1), wherein the two refractory brick moulds (1) are movably spliced, a pouring groove (12) is formed at the splicing position, one end of the pouring groove (12) is sleeved on an aluminum soft belt at a power feeding end, and the other end of the pouring groove is sleeved on an aluminum soft belt at a cathode steel bar end.
5. The method of claim 4, wherein: and the side surfaces of the two refractory brick moulds (1) at the splicing position are provided with aluminum water tanks (11).
6. The method of claim 5, wherein the aluminum soft strip casting is carried out by: the depth of the aluminum water tank (11) is 10-15 mm.
7. The method of claim 5, wherein the aluminum soft strip casting is carried out by: the aluminum water tank (11) is of an L-shaped structure.
8. The method of claim 4, wherein: and one side of the refractory brick mould is provided with a notch (13).
9. The electrolytic cell cathode soft aluminum tape casting method of claim 8, wherein: and the two refractory brick moulds are movably spliced correspondingly at one side provided with the notch (13), and the two corresponding notches (13) are spliced to form a pouring trough (12).
10. The electrolytic cell cathode soft aluminum tape casting method of claim 9, wherein: the notch (13) is of an L-shaped structure.
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| CN202210268866.5A CN114540883B (en) | 2022-03-18 | 2022-03-18 | Casting method for cathode aluminum soft belt of electrolytic tank |
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| CN202210268866.5A CN114540883B (en) | 2022-03-18 | 2022-03-18 | Casting method for cathode aluminum soft belt of electrolytic tank |
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