Heat preservation type structure lining
By using a multi-layered thermal insulation material lining, the thermal balance problem of the aluminum electrolysis cell lining under reduced cathode voltage was solved, achieving temperature stability and uniform current distribution, thereby improving electrolysis efficiency and structural impermeability.
Patent Information
- Application Number
- CN202423320328.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing aluminum electrolysis cell lining cannot meet the regional and overall thermal balance when the cathode voltage drops significantly, resulting in the problem of excessively long extension legs.
The structure is lined with multiple layers of insulation materials, including magnesia composite insulation bricks, hard silica calcium stone insulation bricks, high-strength ceramic fiber boards, ceramic vermiculite insulation boards, and steel plates, combined with silicon carbonitride bricks, to form good thermal insulation performance and electrical conductivity, prevent heat loss and evenly distribute current.
It effectively reduces heat loss, maintains stable internal temperature of the electrolytic cell, improves electrolysis efficiency, prevents sodium vapor penetration and electrolyte leakage, ensures uniform current distribution, and enhances the structural integrity and electrolysis efficiency of the electrolytic cell.
Smart Images
Figure CN223592845U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to aluminum electrolysis equipment technical field, concretely is a heat preservation type structure lining. BACKGROUND
[0002] Aluminum electrolysis cell includes cathode part and anode part, and the cathode part includes steel tank shell, lining and cathode carbon block group, wherein the lining is both the storage of the precipitated aluminum liquid and the conductor of the electrolysis process, which requires the lining to have good electrical conductivity and strong resistance to corrosion of molten salt and aluminum liquid. The aluminum electrolysis cell produces less heat at low voltage, and in view of this situation, when designing the lining of the aluminum electrolysis cell, the area with large original heat dissipation must be considered, especially the cathode steel rod window area. However, the existing aluminum electrolysis cell lining cannot meet the heat balance of the area and the whole under the condition of a large decrease in cathode voltage, and the aluminum electrolysis cell has the problem of too long legs. SUMMARY
[0003] The utility model provides a heat preservation type structure lining, can solve the existing aluminum electrolysis cell lining under the condition of a large decrease in cathode voltage cannot meet the heat balance of the area and the whole, and the problem of too long legs.
[0004] The application provides the following technical scheme:
[0005] A heat preservation type structure lining, comprising a lining bottom and a lining side part, the lining bottom has, from bottom to top, a first layer of brucite composite heat preservation brick, a second layer of xonotlite heat insulation brick, a third layer of high-strength ceramic fiber plate, a fourth layer of ceramic vermiculite heat insulation plate, and a fifth layer of steel plate; the lining side part comprises a long side part and a short side part, the long side part is provided with a steel rod window, and the long side part comprises a first side block, and the first side block is embedded with thermal insulation material.
[0006] Beneficial effects: the brucite composite heat preservation brick, xonotlite heat insulation brick, high-strength ceramic fiber plate and ceramic vermiculite heat insulation plate of the lining bottom have good heat insulation performance, can effectively reduce heat loss and keep the temperature of the electrolysis cell stable. The steel plate is a physical impermeable layer, is arranged above the thermal insulation layer and can effectively prevent the penetration of sodium vapor from corroding the materials of each thermal insulation layer. The first side block of the long side part is embedded with thermal insulation material, which can increase the thermal insulation of the lining on the basis of ensuring the impermeability of the side part of the electrolysis cell. At the same time, it has good electrical conductivity, can ensure uniform distribution of current, reduce resistance loss and improve electrolysis efficiency.
[0007] Further, the first side block is a silicon carbonitride brick embedded with ceramic fiber plate.
[0008] Beneficial effects: the ceramic limiting plate embedded in the silicon carbonitride brick can keep the isotherm and the thickness of the side part within a reasonable range.
[0009] Further, the cathode carbon block group is located above the inner lining bottom, a bottom anti-seepage layer is arranged between the inner lining bottom and the cathode carbon block group, the bottom anti-seepage layer is composed of dry anti-seepage material, and an anti-seepage casting material and a cathode paste are arranged between the inner lining side portion and the cathode carbon block group.
[0010] Beneficial effects: The bottom anti-seepage layer composed of dry anti-seepage material is arranged between the inner lining bottom and the cathode carbon block group, which effectively prevents electrolyte from seeping and protects the structural integrity of the electrolytic tank. The anti-seepage casting material and the cathode paste are arranged between the inner lining side portion and the cathode carbon block group, which further enhances the anti-seepage performance and ensures that the electrolytic tank does not leak during long-term operation.
[0011] Further, the inner lining side portion comprises a lower section, a middle section and an upper section from bottom to top, the lower section comprises, from outside to inside, a first layer of ceramic fiber board and a second layer of xonotlite heat insulation brick; the middle section comprises, from outside to inside, a first layer of xonotlite heat insulation brick and a second layer of vermiculite heat insulation brick; and the upper section comprises, from outside to inside, a first layer of side block and a second layer of special-shaped block, the side block comprises a first side block located at the long side portion and a second side block located at the short side portion, the second side block is silicon carbonitride brick, and the special-shaped block is composed of carbon material.
[0012] Beneficial effects: The inner lining side portion adopts multiple layers of efficient heat insulation materials, which all have good heat insulation performance and can effectively reduce heat loss and maintain the temperature stability inside the electrolytic tank. At the same time, it has good electrical conductivity, ensuring uniform distribution of current and reducing resistance loss to improve electrolytic efficiency.
[0013] Further, a groove is arranged on the outer side of the first side block, heat insulation material is arranged in the groove, and a back plate is arranged at the groove opening of the groove.
[0014] Beneficial effects: The groove and back plate structure of the first side block increase the stability of the structure, prevent the heat insulation material from falling off under high temperature and vibration, ensure long-term use effect, and are simple to install and operate, improving construction efficiency.
[0015] Further, a window baffle is arranged on the inner lining side portion close to the steel rod window, and the window baffle has a U-shaped structure.
[0016] Beneficial effects: The U-shaped window baffle can effectively block the entry of external air, reduce heat loss, and at the same time protect the lining material in the steel rod window area, ensuring the anti-seepage ability of the side portion of the electrolytic tank. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a top view of the first embodiment of the heat preservation type structure lining of the utility model.
[0018] Figure 2 It is a top view of the first embodiment of the heat preservation type structure lining of the utility model. Figure 1 A-A sectional view. A-A sectional view.
[0019] Figure 3 For Figure 1 B-B to the sectional view. DETAILED DESCRIPTION
[0020] Further described in detail by the specific embodiments below:
[0021] The marks in the drawings of the specification include: cathode carbon block group 1, brucite composite insulating brick 2, xonotlite insulating brick 3, high-strength ceramic fiber plate 4, ceramic vermiculite heat insulation plate 5, steel plate 6, bottom impermeable layer 7, ceramic fiber plate 8, vermiculite insulating brick 9, steel bar 10, impermeable casting material 11, cathode paste 12, first side block 13, insulating material 14, second side block 15, special-shaped block 16, ramming material 17,
[0022] Example one
[0023] As Figures 1 to 3 shown, a heat-insulating type structure lining includes a tank shell, the tank shell is provided with a lining bottom, a lining side and a cathode carbon block group 1, the lining side includes a long side and a short side, the long side, the short side and the lining bottom cooperate to form a rectangular groove, a plurality of cathode carbon block groups 1 are arranged in the rectangular groove, each cathode carbon block group 1 is provided with a steel bar 10 at both ends, and the two steel bars 10 extend outward through the opposite long sides.
[0024] The lining bottom is provided with, from bottom to top, a first layer of brucite composite insulating brick 2, a second layer of xonotlite insulating brick 3, a third layer of high-strength ceramic fiber plate 4, a fourth layer of ceramic vermiculite heat insulation plate 5, and a fifth layer of steel plate 6. The cathode carbon block group is located above the lining bottom, and a bottom impermeable layer 7 is arranged between the lining bottom and the cathode carbon block group, the bottom impermeable layer 7 is composed of dry impermeable material, and impermeable casting material 11 and cathode paste 12 are arranged between the lining side and the cathode carbon block group.
[0025] The long side and the short side of the lining side part each comprises a lower section, a middle section and an upper section from bottom to top, the lower section is below the cathode carbon block group 1, the first layer of the lower section from outside to inside is the ceramic fiber plate 8, and the second layer is the xonotlite insulation brick 3. The first layer of the middle section from outside to inside is the xonotlite insulation brick 3, and the second layer is the vermiculite insulation brick 9; the middle section is provided with a steel rod window, the steel rod 10 of the cathode carbon block group 1 passes through the steel rod window and extends outward, and the middle section and the cathode carbon block group 1 are sequentially provided with the anti-infiltration casting material 11 and the cathode paste 12 from outside to inside. The first layer of the upper section from outside to inside is the side block, and the second layer is the special-shaped block 16; the side block comprises a first side block 13 and a second side block 15, the first side block 13 is located at the long side and the connecting part connecting the long side and the short side, and the first side block 13 is embedded with the heat preservation material 14. Specifically, the first side block 13 is provided with at least two recesses arranged in upper and lower directions on the outer side, the heat preservation material 14 is arranged in each recess, a back plate is arranged at the slot of each recess, the heat preservation material 14 is embedded on the first side block 13 by covering the slot through the back plate, and the first side block 13, the heat preservation material 14 and the back plate are fixed by adhesion. The first side block 13 can be a silicon carbonitride brick embedded with the ceramic fiber plate 8, the thickness of the silicon carbonitride brick is 100 mm, the thickness of the ceramic fiber plate 8 is 10 mm, and the thickness of the back plate of the silicon carbonitride brick is 10 mm; the second side block 15 is located at the short side; the second side block 15 is a silicon carbonitride brick, and the special-shaped block 16 is composed of carbon material. The cathode paste 12 is arranged between the upper section and the cathode carbon block group 1, the vermiculite insulation brick 9 and the anti-infiltration casting material 11 are arranged between the upper section and the middle section, and the ramming material 17 is arranged above the side block.
[0026] Example two
[0027] The difference between the embodiment and example one is that the middle section of the long side of the lining side part is provided with a window baffle near the steel rod 10 window, the window baffle is in a U-shaped structure, the steel rod 10 of the cathode carbon block group 1 is located in the U-shaped groove of the window baffle, and the window baffle is located on the outside of the first layer of the middle section.
[0028] The above is only an embodiment of the utility model, the utility model is not limited to this embodiment case related field, and the specific structure and characteristics known in the scheme and other common knowledge are not described too much herein. It should be noted that, for those skilled in the art, without departing from the structure of the utility model, a number of deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect and practicability of the utility model. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.
Claims
1. An insulating type structural lining, characterized by, The inner lining bottom comprises, from bottom to top, a first layer of brucite composite heat preservation brick, a second layer of xonotlite heat insulation brick, a third layer of high-strength ceramic fiber plate, a fourth layer of ceramic vermiculite heat insulation plate, and a fifth layer of steel plate.
2. A thermal mass lining according to claim 1, wherein: The first side block is a silicon carbonitride brick with a ceramic fiber plate embedded therein.
3. A thermal mass lining according to claim 1, wherein: The cathode carbon block group is located above the inner lining bottom, and a bottom anti-seepage layer composed of dry anti-seepage material is arranged between the inner lining bottom and the cathode carbon block group.
4. A thermal mass lining according to claim 1, wherein: The inner lining side portion comprises, from bottom to top, a lower section, a middle section, and an upper section.
5. A thermal mass lining according to claim 1, wherein: The first side block is a silicon carbonitride brick with a ceramic fiber plate embedded therein.
6. A thermal mass lining according to claim 1, wherein: The first side block is a silicon carbonitride brick with a ceramic fiber plate embedded therein. The first side block is a silicon carbonitride brick with a ceramic fiber plate embedded therein.