Protection method of electrolytic cell

Abstract

The invention relates to the technical field of aluminum electrolysis, and discloses a protection method of an electrolytic bath, which comprises the following steps: a baffle is mounted on the inner side of a furnace wall, and the bottom of the baffle is propped against the furnace wall, so that an accommodating space is formed between the side surface of the baffle and the furnace wall; and filling the accommodating space with a filling piece, wherein the filling piece comprises aluminum oxide powder. By installing the baffle and constructing the filling layer, the baffle and the filling piece form mechanical-metallurgical composite combination through physical characteristics and interaction with an electrolytic environment, so that the furnace wall is protected, scouring of horizontal current and molten aluminum is reduced, the problem of furnace wall damage caused by uneven current distribution and scouring of the molten aluminum is effectively relieved, and the service life of the furnace wall is prolonged. The stability, integrity and functionality of the furnace wall are maintained, the service life of the electrolytic bath is prolonged, and the risk of bath leakage is reduced. And moreover, the uniformity of current on the side wall of the electrolytic bath is improved, horizontal current distribution is reduced, the stability of the electrolytic bath is enhanced, energy loss is reduced, and electrolytic efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of aluminum electrolysis, and in particular to a method for protecting an electrolytic cell. Background Art

[0002] During the aluminum electrolysis process, the side walls of the electrolytic cell are exposed to a harsh environment characterized by high temperatures (above 940°C), highly corrosive electrolytes, and dynamic aluminum liquid flow. These issues present the following challenges: uneven current distribution leads to locally high current density, causing electrochemical corrosion and localized overheating. Continuous mechanical erosion of the side walls by the circulating aluminum liquid depletes them, degrading magnetic field stability and increasing horizontal current. These walls are prone to damage in this harsh operating environment, and existing protective measures, mostly passive maintenance, are inefficient and impact production. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] The technical solution of the present application proposes a method for protecting an electrolytic cell, which includes: installing a baffle on the inner side of a furnace side, with the bottom of the baffle abutting against the furnace side, so that a receiving space is formed between the side of the baffle and the furnace side; and filling the receiving space with a filler, wherein the filler includes alumina powder.

[0005] In some technical solutions provided in the present application, the electrolytic cell also includes a side wall shaped carbon block and a cell shell, the cell shell is located on the side of the side wall shaped carbon block away from the furnace side, and the outer side of the furnace side is fitted to the side wall shaped carbon block, and the protective device also includes a clamp; the baffle is installed on the inner side of the furnace side, and the bottom of the baffle is abutted against the furnace side to form an accommodating space between the side of the baffle and the furnace side, specifically including: placing the baffle on the inner side of the furnace side; and detachably connecting the two ends of the clamp to the baffle and the cell shell respectively.

[0006] In some technical solutions provided in the present application, the clamp includes a first connecting plate, a second connecting plate and a third connecting plate, and the two ends of the third connecting plate are respectively connected to the first connecting plate and the second connecting plate. The steps of detachably connecting the two ends of the clamp to the baffle and the tank shell specifically include: connecting the first connecting plate to the baffle so that the top end of the baffle is inserted into the mounting groove of the first connecting plate, and the third connecting plate is located above the side wall special-shaped carbon block; detachably connecting the second connecting plate to the side wall of the tank shell.

[0007] In some technical solutions provided in the present application, the step of filling the accommodation space with a filler specifically includes: adding calcium fluoride to alumina powder to form a filler, so that the calcium fluoride forms a grain boundary strengthening phase at the grain boundaries of the alumina; wherein the specific gravity of the alumina powder is 80wt% to 90wt%, and the specific gravity of the calcium fluoride is 10wt% to 20wt%.

[0008] In some technical solutions provided in the application, the step of adding calcium fluoride into the alumina powder to form the filling piece specifically comprises: laying alumina powder between the baffle and the furnace wall to form an alumina layer; laying calcium fluoride above the alumina layer to form a calcium fluoride layer; and laying alumina powder above the calcium fluoride layer.

[0009] In some technical solutions provided in the application, after the step of filling the containing space with the filling piece, the method further comprises: controlling the air gun to vibrate and press the outer surface of the filling piece, so that the surface layer of the filling piece has a density greater than or equal to 95%.

[0010] In some technical solutions provided in the application, the step of controlling the air gun to vibrate and press the outer surface of the filling piece specifically comprises: controlling the air gun to press for a first time length at a first air pressure; and controlling the air gun to press for a second time length at a second air pressure, wherein the second air pressure is greater than the first air pressure, and the second time length is greater than the first time length.

[0011] In some technical solutions provided in the application, after the step of filling the containing space with the filling piece, the method further comprises: arranging the temperature detection piece on the side of the tank shell away from the irregular carbon block of the side wall; and controlling the control device to receive the temperature information obtained by the temperature detection piece, and sending a maintenance signal when the temperature information exceeds a threshold temperature.

[0012] In some technical solutions provided in the application, before the step of installing the baffle on the inner side of the furnace wall, abutting the bottom of the baffle with the furnace wall, and forming a containing space between the side of the baffle and the furnace wall, the method further comprises: cleaning the inner side of the furnace wall; determining the damage size of the furnace wall; determining the outer size of the baffle according to the damage size, wherein the outer size is greater than the damage size; and manufacturing the baffle based on the outer size.

[0013] In some technical solutions provided in the application, after the step of filling the containing space with the filling piece, the method further comprises: periodically supplementing alumina powder between the baffle and the furnace wall, and the supplementing amount of the alumina powder is less than or equal to 5 kg per time.

[0014] Compared with the related art, the application at least has the following beneficial effects:

[0015] By installing the baffle and building the filling layer, the baffle and the filling piece form a mechanical-metallurgical composite bond through physical properties and interaction with the electrolytic environment, realize the protection of the furnace side, reduce the horizontal current and the scouring of the aluminum liquid, effectively alleviate the problem of the damage of the furnace side caused by uneven current distribution and aluminum liquid scouring, maintain the stability, integrity and functionality of the furnace side, prolong the service life of the electrolytic cell and reduce the risk of cell leakage. Moreover, the baffle and the filling piece balance the resistance by uniforming the thickness of the furnace side, suppress the aluminum liquid fluctuation to eliminate the abnormal conduction path, optimize the conduction environment of the side of the electrolytic cell, improve the uniformity of the side wall current of the electrolytic cell, reduce the horizontal current distribution, enhance the stability of the electrolytic cell, reduce the energy loss and improve the electrolysis efficiency. The protection method of the embodiment has the advantages of short repair time, easy operation and low comprehensive cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of some embodiments with reference to the drawings. The drawings are for purposes of illustration only and are not considered a limitation of the present application. Moreover, like reference numerals are used to designate identical parts throughout the specification and drawings. In the drawings:

[0017] Figure 1 a flowchart of a protection method of an embodiment provided by the present application;

[0018] Figure 2 a front view of a protection device of an embodiment provided by the present application;

[0019] Figure 3 a top view of a protection device of an embodiment provided by the present application.

[0020] wherein, Figures 1 to 3 The correspondence between the reference numerals and the component names in the accompanying drawings is as follows:

[0021] 100, baffle; 200, filling piece; 400, clamp; 410, first connecting plate; 411, mounting groove; 420, second connecting plate; 430, third connecting plate; 440, alloy bolt; 500, temperature detection piece; 21, furnace side; 22, side wall special-shaped carbon block; 23, cell shell. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solutions, the technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific features in the embodiments and the specific embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments and the specific embodiments can be combined with each other.

[0023] The embodiment of the present application provides a method for protecting an electrolytic cell, such as Figure 1 As shown, the protection method of the electrolytic cell includes:

[0024] Step 11: Install the baffle on the inner side of the furnace side, with the bottom of the baffle abutting against the furnace side, so that a receiving space is formed between the side of the baffle and the furnace side;

[0025] Step 12: Filling the receiving space with a filler, wherein the filler comprises aluminum oxide powder.

[0026] In this embodiment, if Figure 2 As shown, the furnace side 21, a solid protective layer formed between the sidewall of the electrolytic cell and the molten electrolyte, is inclined toward the sidewall of the electrolytic cell. Workers align the side of the baffle 100 with the inner side of the furnace side 21, so that the bottom of the baffle 100 abuts the bottom of the furnace side 21. A gap is formed between the top of the baffle 100 and the furnace side 21, thus forming a gradually increasing accommodation space between the baffle 100 and the furnace side 21. The baffle 100 is made of graphite and silicon nitride.

[0027] Staff fill the receiving space with a filler 200 containing alumina powder, which solidifies during the sintering process. The thickness of the filler 200 is 60 to 70 mm. Because alumina powder has a low thermal conductivity, much lower than that of metal or molten electrolyte, the filler forms a thermal barrier, stabilizing the temperature field of the furnace side, aligning its solidification rate with its melting rate, and thus maintaining the thickness of the side, ensuring its protective function. Due to its loose texture, the alumina powder acts as a buffer layer to absorb impact energy, reducing the direct impact force of molten aluminum or electrolyte fluctuations on the side. The baffle itself blocks most of the lateral impact force, while the filler further distributes the residual stress, preventing cracking or spalling of the side due to localized excessive stress. The physical barrier formed by the filler on the side surface reduces the direct contact area between the molten electrolyte and the side, thereby reducing the rate of erosion by the molten electrolyte. In addition, alumina and fluoride salts in the electrolyte can form stable compounds. Such compounds have a higher melting point and stronger chemical stability. After adhering to the surface of the furnace side, the compound can enhance the corrosion resistance of the furnace side.

[0028] By installing baffles and constructing a filling layer, the baffles and filling pieces form a mechanical-metallurgical composite bond through their physical properties and interaction with the electrolytic environment, thereby protecting the furnace side, reducing the horizontal current and the scouring of molten aluminum, and effectively alleviating the problem of furnace side damage caused by uneven current distribution and scouring of molten aluminum. The stability, integrity and functionality of the furnace side are maintained, the service life of the electrolytic cell is extended, and the risk of leakage is reduced. In addition, the baffles and filling pieces even out the thickness of the furnace side to balance the resistance, suppress the fluctuation of the molten aluminum to eliminate abnormal conductive paths, optimize the conductive environment on the side of the electrolytic cell, improve the uniformity of the current on the side wall of the electrolytic cell, reduce the horizontal current distribution, enhance the stability of the electrolytic cell, reduce energy loss, and improve the electrolysis efficiency. The protection method of the present application has the advantages of short repair time, easy operation, and low overall cost.

[0029] In some embodiments provided herein, the electrolytic cell further includes a sidewall shaped carbon block 22 and a tank shell 23. The tank shell 23 is located on a side of the sidewall shaped carbon block 22 facing away from the furnace side 21. The outer side of the furnace side 21 is in contact with the sidewall shaped carbon block 22. The protective device further includes a clamp 400. Step 11 of installing a baffle on the inner side of the furnace side with the bottom of the baffle abutting against the furnace side to form an accommodation space between the side of the baffle and the furnace side specifically includes:

[0030] Step 111, placing the baffle on the inner side of the furnace side;

[0031] Step 112: detachably connect the two ends of the fixture to the baffle and the tank shell respectively.

[0032] In this embodiment, if Figure 2 and Figure 3 As shown, a method for installing the baffle is provided. The sidewall shaped carbon blocks 22 are located outside the furnace side 21, and the sidewall shaped carbon blocks 22 are located inside the sidewall of the tank shell 23. The sidewall shaped carbon blocks 22 provide structural protection for the tank shell 23, so that the sidewall shaped carbon blocks 22 and the furnace side 21 are located between the tank shell 23 and the baffle 100.

[0033] After placing the baffle on the inside of the furnace side, the staff then removably connects the ends of the fixture to the baffle and the tank shell, securing the baffle to the inside of the furnace side through the fixture and tank shell, making the baffle installation more stable and secure. The modular structure of the fixture facilitates the rapid replacement of the baffle, improving the convenience and efficiency of replacement when the baffle is severely worn. When replacing anodes or when the furnace side temperature rises rapidly, the staff reinforces the fixture to ensure the stability of the baffle.

[0034] In some embodiments provided herein, the clamp includes a first connecting plate, a second connecting plate, and a third connecting plate, with the ends of the third connecting plate being connected to the first connecting plate and the second connecting plate, respectively. Step 112 of detachably connecting the ends of the clamp to the baffle and the tank shell, respectively, specifically includes:

[0035] Step 1121, connect the first connecting plate to the baffle, insert the top end of the baffle into the mounting groove of the first connecting plate, and position the third connecting plate above the sidewall special-shaped carbon block;

[0036] Step 1122: detachably connect the second connecting plate to the side wall of the tank shell.

[0037] In this embodiment, a specific installation method of the clamp 400 is provided. The extension direction of the first connecting plate 410 and the second connecting plate 420 is the same as the extension direction of the baffle 100, and the extension direction of the third connecting plate 430 is perpendicular to the extension direction of the first connecting plate 410. The two ends of the third connecting plate 430 are respectively connected to the middle position of the first connecting plate 410 and the second connecting plate 420, so that the clamp 400 forms an "I" shape. One end of the third connecting plate 430 is overlapped with the top surface of the first connecting plate 410, and the other end of the third connecting plate 430 is connected to the side wall of the second connecting plate 420. The first connecting plate 410, the second connecting plate 420 and the third connecting plate 430 are fixed by welding. The bottom surface of the first connecting plate 410 is provided with a mounting groove 411, and the groove width of the mounting groove 411 is adapted to the thickness of the baffle 100.

[0038] The staff placed the first connecting plate on the baffle, allowing the top of the baffle to extend into the installation slot to limit the top of the baffle. The first connecting plate achieved a removable connection to the baffle through plug-in, eliminating the need for connectors, simplifying the baffle's installation components and steps, and improving the efficiency and convenience of baffle assembly and disassembly. The third connecting plate is located above the shaped carbon blocks on the side wall and extends from the inside to the outside of the furnace side. The staff removably connected the second connecting plate to the top of the side wall of the tank shell to facilitate the installation and replacement of the baffle. The "I"-shaped clamp cooperates with the tank shell to ensure a more stable and secure fixation of the baffle.

[0039] In some embodiments provided herein, step 12 of filling the accommodation space with a filler specifically includes:

[0040] Step 121, adding calcium fluoride to alumina powder to form a filler, so that the calcium fluoride forms a grain boundary strengthening phase at the grain boundaries of the alumina;

[0041] The proportion of the aluminum oxide powder is 80 wt % to 90 wt %, and the proportion of the calcium fluoride is 10 wt % to 20 wt %.

[0042] In this embodiment, the specific composition of the filler is provided. The filler includes 10wt% to 20wt% calcium fluoride and 80wt% to 90wt% alumina powder, with the calcium fluoride having a particle size of 50nm to 100nm. The calcium fluoride forms a grain boundary strengthening phase at the grain boundaries of the alumina. The grain boundary strengthening phase significantly improves the creep resistance and mechanical properties of the filler at high temperatures by inhibiting grain boundary migration, reducing vacancy diffusion, and optimizing the grain boundary structure. This enables the filler to achieve high-density sintering at a lower temperature, improves the density of the filler, and makes the filler more suitable for the operating requirements of the aluminum electrolytic cell.

[0043] In some embodiments provided herein, step 121 of adding calcium fluoride to alumina powder to form a filler specifically includes:

[0044] Step 1211: laying aluminum oxide powder between the baffle and the furnace side to form an aluminum oxide layer;

[0045] Step 1212, laying calcium fluoride on the aluminum oxide layer to form a calcium fluoride layer;

[0046] Step 1213: laying aluminum oxide powder on top of the calcium fluoride layer.

[0047] This embodiment provides a method for mixing fillers. Alumina powder is laid between the baffle and the furnace side to form an alumina layer. Calcium fluoride is then laid on top of the alumina layer to form a calcium fluoride layer. Steps 1212 and 1213 are repeated, alternating between the alumina and calcium fluoride layers. This improves the uniformity of the mixing of the alumina powder and calcium fluoride, making the distribution of calcium fluoride more even and making it easier to control the specific gravity of the alumina powder and calcium fluoride. The alumina functional layer is formed by adding 10% to 20% calcium fluoride as a modifier, forming an alumina protective layer with gradient properties. The cumulative thickness of the alumina layer ranges from 20 mm to 50 mm to ensure effective protection.

[0048] In another embodiment, step 121 of adding calcium fluoride to alumina powder to form a filler specifically includes: mixing the alumina powder and calcium fluoride according to specific gravity, and then directly filling the mixture between the baffle and the furnace side.

[0049] In some embodiments provided in the present application, after step 12 of filling the accommodation space with a filling member, the method further includes:

[0050] Step 13, controlling the air cannon to vibrate and press the outer surface of the filling piece so that the surface density of the filling piece is greater than or equal to 95%.

[0051] In the embodiment, the compacting operation of the filling piece is provided. The air cannon can be a pneumatic wrench, and the striking part of the air cannon can perform a hammering movement. The worker controls the vibration of the air cannon to press the outer surface of the filling piece, so as to improve the surface density of the filling piece and make the filling state of the filling piece more compact, so as to ensure the protection effect of the filling piece.

[0052] In some embodiments provided in the application, the step 13 of controlling the air cannon to press the outer surface of the filling piece specifically comprises:

[0053] The step 131 of controlling the air cannon to press for a first time length at a first air pressure is performed.

[0054] The step 132 of controlling the air cannon to press for a second time length at a second air pressure is performed.

[0055] The second air pressure is greater than the first air pressure, and the second time length is greater than the first time length.

[0056] In the embodiment, the specific steps of compacting the filling piece are provided. For example, the first air pressure can be 0.2 MPa, the first time length can be 3 min, the second air pressure can be 0.4 MPa, and the second time length can be 7 min. The worker controls the air cannon to press the filling piece at 0.2 MPa for 3 min, and then increases the pressing air pressure and pressing time of the air cannon, controls the air cannon to press the filling piece at 0.4 MPa for 7 min. Compared with single frequency pressing, the frequency increasing mode realizes progressive densification, can more comprehensively reduce the porosity inside the filling piece, and finally realizes more compact pressing effect.

[0057] In some embodiments provided in the application, after the step 12 of filling the containing space with the filling piece, the method further comprises:

[0058] The step 24 of arranging the temperature detection piece on the side of the tank shell away from the irregular shaped carbon block of the side wall is performed.

[0059] The step 25 of controlling the control device to receive the temperature information obtained by the temperature detection piece, and sending a maintenance signal when the temperature information exceeds the threshold temperature is performed.

[0060] In this embodiment, an early warning method is provided. The staff sets a temperature detection part 500 on the outside of the tank shell. The temperature detection part 500 is a temperature sensor. For example, the temperature detection part is an embedded optical fiber sensor. The temperature is used to detect the temperature information of the special-shaped carbon blocks on the side wall, and then obtain the temperature condition of the tank shell. The control device can be a PLC (Programmable Logic Controller). The temperature detection part sends the detected temperature information to the control device. When the temperature information exceeds the threshold temperature, it means that the temperature at this location is too high and the furnace side may be seriously damaged. The control device sends a maintenance signal to remind the staff to repair the area in time. The control device can give an early warning of furnace side abnormalities based on real-time monitoring of the temperature detection part to achieve active protection. For example, the threshold temperature can be 350°C.

[0061] In some embodiments provided in the present application, before step 11 of installing the baffle on the inner side of the furnace side so that the bottom of the baffle abuts against the furnace side to form an accommodation space between the side of the baffle and the furnace side, the following steps are further included:

[0062] Step 101, cleaning the inner side of the furnace side;

[0063] Step 102, determining the damage size of the furnace side;

[0064] Step 103, determining the outer dimensions of the baffle according to the damage dimensions, wherein the outer dimensions are larger than the damage dimensions;

[0065] Step 104 : manufacturing a baffle based on the outer dimensions.

[0066] This embodiment provides accurate preliminary steps for the baffle. After lifting the anode of the electrolytic cell, the staff uses an overhead crane to remove the electrolyte crust and uses a blast gun to clean the surface of the furnace side. Damage data for the furnace side is obtained. If the thickness of the residual layer of the furnace side is ≥30 mm, the staff identifies the portion of the furnace side below the thickness threshold as the damaged area and determines the damage size of the furnace side. The damage size is the projection of the damaged area onto the baffle in a direction perpendicular to the baffle. The baffle and fixture are then manufactured based on the damage size to ensure that the baffle can cover the damaged area of ​​the furnace side, ensuring the shielding and protective effects of the baffle.

[0067] In some embodiments provided in the present application, after step 12 of filling the accommodation space with a filling member, the method further includes:

[0068] Step 32: regularly replenish alumina powder between the baffle and the furnace side, with the replenishment amount of alumina powder being less than or equal to 5 kg per time.

[0069] This embodiment provides a method for replenishing the filler. Staff regularly replenish alumina powder between the baffle and the furnace side according to a replenishment period to compensate for wear and tear of the filler during use and ensure that the filler is filled to meet protection requirements. The replenishment period can be one week, and the amount of alumina powder replenished each time is less than or equal to 5kg. This ensures that the replenishment amount meets the replenishment requirements while preventing excessive replenishment and leakage.

[0070] For example, after the worker detachably connects the second connecting plate and the trough shell using alloy bolts 440 and fills the accommodation space with a filler in step 12, the following steps are further performed: the worker periodically checks the preload force of the alloy bolts according to an inspection period. If the preload force falls below a preload threshold, the worker re-tightens the alloy bolts to increase the preload force and ensure the connection strength of the alloy bolts. The inspection period may be one month.

[0071] In the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0072] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0073] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] The above merely shows some embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for protecting an electrolytic cell, characterized in that: The protection method is performed using a protection device, the protection device comprising: a baffle and a filling member, the electrolytic cell comprising a furnace side, and the protection method comprising: The baffle is installed on the inner side of the furnace side, with the bottom of the baffle abutting against the furnace side, so that a receiving space is formed between the side of the baffle and the furnace side; The accommodating space is filled with the filling member, which includes aluminum oxide powder.

2. The electrolytic cell protection method according to claim 1, characterized in that: The electrolytic cell further includes a sidewall shaped carbon block and a cell shell, wherein the cell shell is located on a side of the sidewall shaped carbon block facing away from the furnace side, and the outer side of the furnace side is in contact with the sidewall shaped carbon block. The protective device further includes a clamp. The step of installing the baffle on the inner side of the furnace side with the bottom of the baffle abutting against the furnace side to form an accommodation space between the side of the baffle and the furnace side specifically includes: placing the baffle on the inner side of the furnace side; The two ends of the clamp are detachably connected to the baffle and the tank shell respectively.

3. The electrolytic cell protection method according to claim 2, characterized in that: The clamp includes a first connecting plate, a second connecting plate, and a third connecting plate, wherein two ends of the third connecting plate are respectively connected to the first connecting plate and the second connecting plate. The step of detachably connecting the two ends of the clamp to the baffle and the tank shell specifically includes: Connect the first connecting plate to the baffle, insert the top end of the baffle into the mounting groove of the first connecting plate, and position the third connecting plate above the sidewall special-shaped carbon block; The second connecting plate is detachably connected to the side wall of the tank shell.

4. The electrolytic cell protection method according to claim 1, characterized in that: The step of filling the accommodation space with the filling member specifically includes: Adding calcium fluoride to the alumina powder to form the filler, so that the calcium fluoride forms a grain boundary strengthening phase at the grain boundaries of the alumina; The proportion of the aluminum oxide powder is 80 wt % to 90 wt %, and the proportion of the calcium fluoride is 10 wt % to 20 wt %.

5. The electrolytic cell protection method according to claim 4, characterized in that: The step of adding calcium fluoride to the alumina powder to form the filler specifically includes: Laying the alumina powder between the baffle and the furnace side to form an alumina layer; laying the calcium fluoride on the alumina layer to form a calcium fluoride layer; The aluminum oxide powder is laid on top of the calcium fluoride layer.

6. The method for protecting an electrolytic cell according to any one of claims 1 to 5, characterized in that: After the step of filling the accommodation space with the filling member, the method further includes: The air cannon is controlled to vibrate and press the outer surface of the filling piece so that the surface density of the filling piece is greater than or equal to 95%.

7. The electrolytic cell protection method according to claim 6, characterized in that: The step of controlling the air cannon to vibrate and press the outer surface of the filling piece specifically includes: Controlling the air cannon to press continuously for a first time period at a first air pressure; Controlling the air cannon to press continuously for a second time period at a second air pressure; The second wind pressure is greater than the first wind pressure, and the second time duration is greater than the first time duration.

8. The electrolytic cell protection method according to claim 2, characterized in that: After the step of filling the accommodation space with the filling member, the method further includes: The temperature detecting member is arranged on the side of the tank shell away from the sidewall special-shaped carbon block; The control device receives the temperature information obtained by the temperature detection component, and sends a maintenance signal when the temperature information exceeds a threshold temperature.

9. The method for protecting an electrolytic cell according to any one of claims 1 to 5, characterized in that: Before the step of installing the baffle on the inner side of the furnace side, abutting the bottom of the baffle against the furnace side, and forming an accommodation space between the side of the baffle and the furnace side, the method further includes: Cleaning the inner side of the furnace side; Determining the damaged size of the furnace side; Determining the outer dimensions of the baffle according to the damage dimension, wherein the outer dimensions are larger than the damage dimension; The baffle is manufactured based on the outer dimensions.

10. The method for protecting an electrolytic cell according to any one of claims 1 to 5, characterized in that: After the step of filling the accommodation space with the filling member, the method further includes: The alumina powder is regularly replenished between the baffle and the furnace side, and the replenishment amount of the alumina powder is less than or equal to 5 kg per time.

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