Low heat dissipation device for electrolytic cell furnace surface insulation material
By installing a combination of horizontal bars, diagonal bars, baffle plates, and thin heat insulation plates on the surface of the electrolytic cell furnace, the problem of severe heat loss of the furnace surface insulation material in electrolytic aluminum production was solved, thereby reducing energy consumption and improving energy utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU JINNUOQI ENERGY SAVING TECHNOLOGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-19
AI Technical Summary
In traditional electrolytic aluminum production, heat loss from the insulation material on the surface of the electrolytic cell is severe, resulting in high energy consumption and low energy utilization. Existing methods are insufficient to effectively reduce heat loss.
The device includes crossbars, diagonal bars, baffle plates, and thin insulation boards. The baffle plates prevent the insulation material from slipping, and the thin insulation boards reduce heat loss. The device has a detachable structure for easy installation and maintenance, and uses materials with high temperature resistance and good thermal insulation performance.
It significantly reduces energy consumption in electrolytic aluminum production, reduces heat loss, improves energy utilization, and the equipment is recyclable, making it economical and environmentally friendly.
Smart Images
Figure CN224378242U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrolytic aluminum production technology, and in particular to a device for reducing heat dissipation from the insulating material on the surface of the electrolytic cell, which aims to reduce energy consumption in the electrolytic aluminum production process. Background Technology
[0002] Traditional electrolytic aluminum production is an energy-intensive process, requiring approximately 13,500 kilowatt-hours of electricity to produce one ton of aluminum. However, the energy utilization rate is low, less than 50%. This means that for every ton of aluminum produced, about 7,000 kilowatt-hours of electricity are wasted as heat, of which about 3,000 kilowatt-hours are lost through the heat dissipation of the insulation material on the surface of the electrolytic cell. The electrolytic aluminum production reaction is completed inside the electrolytic cell furnace. Several sets of anodes are installed above the furnace. The anode consists of several parts, including anode carbon blocks, anode steel claws, anode steel beams, and anode guide rods. Steel plates for the side walls of the furnace are welded around the furnace. Iron plates for the furnace are welded above the side walls to protect the furnace. The iron plates also help to dissipate heat and form side walls during production. Part of the furnace surface insulation material covers the anode directly above it, in close contact with the anode surface. The other part covers the electrolyte between the anode end and the side wall of the furnace. The furnace surface insulation material has two main functions: first, to prevent the furnace and anode from dissipating heat to the outside, thus reducing heat loss from the electrolytic cell; and second, to cover the anode surface, isolating the anode from the air and preventing the anode from being oxidized by oxygen in the air at high temperatures (anodic oxidation). Traditional electrolytic cell furnace surface insulation materials mainly consist of alumina and electrolytes, resulting in a high heat dissipation coefficient and significant heat loss. In production, insulation performance is primarily improved by increasing the thickness and reducing the particle size of the insulation material; thicker material generally provides better insulation, and smaller (fineer) particle sizes also contribute to better insulation. However, excessively thick insulation material directly above the anode can bury the anode steel beam, increasing its temperature and negatively impacting production. In practice, it's generally required that the insulation material above the anode be approximately 2 cm above the lower edge of the anode steel beam. Therefore, increasing the thickness of the insulation material to improve its insulation performance has limited effectiveness. Electrolytic cells typically replace a set of old anodes (low residual anodes) with a set of new anodes daily. Because the surface area of the new anodes is relatively high, the slope of the furnace surface insulation material formed at the anode end is steep when used for edge shaping. This causes the insulation material to easily slip off, resulting in insufficient insulation thickness at the end of the new anode. In severe cases, it may not even cover the anode end, failing to provide insulation and prevent anode oxidation. The finer the furnace surface insulation material, the better its fluidity, making it even more prone to slippage when used for edge shaping of the new anodes. This also leads to insufficient insulation thickness at the end of the new anode, and the slipped insulation material can bury the electrolytic cell and press against iron, adversely affecting production. Therefore, the furnace surface insulation material cannot be made too fine; in actual production, the particle size is generally required to be controlled at around 5 mm in diameter. These factors result in heat loss from the furnace surface insulation material in electrolytic aluminum production reaching as high as 3000 degrees Celsius per ton of aluminum. Therefore, reducing heat loss from furnace surface insulation material is an important way to reduce energy consumption in electrolytic aluminum production and a key issue that the aluminum industry has been trying to address. Summary of the Invention
[0003] The present invention provides a low heat dissipation device for the furnace surface insulation material of an electrolytic cell, which can effectively solve the above problems. After using this device, the heat dissipated through the furnace surface insulation material is greatly reduced, thereby reducing the energy consumption of electrolytic aluminum production.
[0004] The purpose of this utility model and the solution to its main technical problem are achieved by the following technical solution:
[0005] This utility model discloses a low heat dissipation device for the heat insulation material of an electrolytic cell furnace surface, comprising a horizontal bar, a diagonal bar, and a baffle plate, wherein: one end of the horizontal bar and one end of the diagonal bar are fixedly connected to the baffle plate, and the other end of the horizontal bar is fixedly connected to the other end of the diagonal bar.
[0006] It also includes a thin heat insulation plate, which covers the furnace surface insulation material at the anode end and the furnace surface insulation material directly above the anode, with the thin heat insulation plate abutting the top of the baffle plate.
[0007] The thin insulation board is made of one or more of the following materials that have good thermal insulation performance and high temperature resistance: rock wool, ceramic fiber adhesive, aluminum silicate, aerogel adhesive, high silica cloth, and fire-resistant fiber cloth.
[0008] The baffle plate is made of a high-temperature resistant, corrosion-resistant, and non-magnetic metal material. It is used to prevent the insulation material from slipping off and to maintain the thickness of the covering material.
[0009] The device has a detachable structure, which facilitates installation and maintenance.
[0010] Compared with existing technologies, this invention has significant advantages. As can be seen from the above technical solution: by fixing a baffle plate to one end of the horizontal bar and one end of the diagonal bar, and fixing the other end of the horizontal bar to the other end of the diagonal bar, the anode steel beam is prevented from being buried, thus preventing the temperature of the anode steel beam from rising. It also ensures that the insulation material thickness at the end of the newly replaced anode meets the standard and prevents slippage. The thin insulation plate effectively reduces heat dissipation, lowers the tank voltage, and significantly reduces production energy consumption. The device is recyclable, economical, and environmentally friendly. In summary, this invention, through the combination of a baffle plate and a thin insulation plate, effectively reduces heat dissipation from the insulation material while avoiding adverse effects on production. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 yes Figure 1 Sectional view of AA;
[0013] Figure 3 This is a structural schematic diagram of the crossbar, diagonal bar, and baffle plate of this utility model;
[0014] Figure 4 yes Figure 3 Sectional view of BB;
[0015] Figure 5 This is a diagram showing the usage state of this utility model;
[0016] Figure 6 This is a schematic diagram of the structure of the insulation material for the furnace surface of a traditional electrolytic cell.
[0017] Markings in the figure
[0018] 1. Horizontal bar, 2. Diagonal bar, 3. Material baffle plate, 4. Thin heat insulation board, 5. Furnace surface insulation material at the end of the anode, 6. Furnace surface insulation material directly above the anode, 7. New anode replacement, 8. Anode steel beam, 9. Side wall of electrolytic cell furnace, 10. Electrolytic cell iron pressure plate, 11. Steel plate on the side of electrolytic cell. Detailed Implementation
[0019] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structure, features, and effects of this utility model.
[0020] This utility model discloses a low-heat dissipation device for electrolytic cell furnace surface insulation material, comprising a horizontal bar 1, a diagonal bar 2, and a baffle plate 3. One end of the horizontal bar 1 and one end of the diagonal bar 2 are fixedly connected to the baffle plate 3, and the other end of the horizontal bar 1 is fixedly connected to the other end of the diagonal bar 2. It also includes a thin heat insulation plate 4, which covers the furnace surface insulation material 5 at the anode end and the furnace surface insulation material 6 directly above the anode, with the thin heat insulation plate 4 abutting against the top of the baffle plate 3. The thin heat insulation plate 4 is made of one or more of the following materials with good heat insulation performance and high temperature resistance: rock wool, ceramic fiber adhesive, aluminum silicate, aerogel adhesive, high-silica cloth, and refractory microfiber cloth. The thin heat insulation plate 4 abuts against the top of the baffle plate 3, which is made of a high-temperature resistant, corrosion-resistant, and non-magnetic metal material. It is used to prevent the insulation material from slipping and maintain the coverage thickness. The device has a detachable structure for easy installation and maintenance. The baffle plate 3, horizontal bar 1, diagonal bar 2, and thin heat insulation plate 4 are manufactured according to the dimensions of the electrolytic cell. When changing poles, install a baffle plate, adjust the thickness of the insulation material, and then cover with a thin insulation board 4. Regularly check the status of the device to ensure its high temperature resistance and heat insulation performance.
[0021] In use: An electrolytic cell side steel plate 11 is welded to the outer side of the electrolytic cell furnace side wall 9. An electrolytic cell pressure plate 10 is installed above the electrolytic cell furnace side wall 9, and the electrolytic cell pressure plate 10 is welded to the electrolytic cell side steel plate 11. The electrolytic cell anode is installed above the electrolytic cell furnace, and an anode steel beam 8 is installed on the electrolytic cell anode. After the new anode 7 is installed in the electrolytic cell, a baffle plate 3, with a horizontal bar 1 and a diagonal bar 2 welded together, is installed on the electrolytic cell pressure plate 10 at the position corresponding to the new anode 7. The baffle plate 3 faces the side of the new anode 7, and the horizontal bar 2 is away from the baffle plate 3. The end of the anode end is fixed against the inner wall of the steel plate 11 on the side of the electrolytic cell. Anode end furnace surface insulation material 5 is added between the side wall 9 of the electrolytic cell furnace, the baffle plate 3, and the end of the newly replaced anode 7. Due to the blocking effect of the baffle plate 3, the thickness of the anode end furnace surface insulation material 5 can reach the required process thickness without slipping. As electrolytic aluminum production continues, the anode end furnace surface insulation material 5 caking under high-temperature sintering. At this time, the baffle plate 3, which is welded with the horizontal bar 1 and the diagonal bar 2, is removed. The caking anode end furnace surface insulation material 5 can maintain its original shape well. The material retaining plate 3, with its welded connections of horizontal bar 1 and diagonal bar 2, is removed and reused during the next anode replacement. After controlling the thickness of the furnace surface insulation material 5 at the anode end and the furnace surface insulation material 6 directly above the anode within the process requirements, several thin heat insulation boards 4 are used to cover the surfaces of the furnace surface insulation material 5 at the anode end and the furnace surface insulation material 6 directly above the anode. Because the thin heat insulation board 4 has good heat insulation performance, its thickness can be made relatively thin to meet the heat insulation requirements. When it covers the surface of the furnace surface insulation material 6 directly above the anode, it will not cause burial. Without the anode steel beam 8, the temperature of the anode steel beam 8 will not rise. When replacing the anode in the electrolytic cell, the thin heat insulation plate 4 can be removed and reused. The anode replacement can be carried out according to the conventional procedure. Since the heat dissipation of the thin heat insulation plate 4 is much lower than that of the furnace surface insulation material 5 at the anode end and the furnace surface insulation material 6 directly above the anode, it covers the surface of the furnace surface insulation material 5 at the anode end and the furnace surface insulation material 6 directly above the anode, effectively blocking the heat dissipation of the furnace surface insulation material to the outside. Therefore, it can significantly reduce the heat expenditure of the electrolytic cell, so that the cell voltage in the electrolytic aluminum production can be reduced, thereby reducing the energy consumption of electrolytic aluminum production.
Claims
1. A low heat dissipation device for pot furnace insulation material, comprising a horizontal rod (1), an inclined rod (2) and a material blocking plate (3), characterized in that: One end of the horizontal bar (1) and one end of the diagonal bar (2) are fixedly connected to the baffle plate (3), and the other end of the horizontal bar (1) is fixedly connected to the other end of the diagonal bar (2).
2. The low heat dissipation device for pot cover of electrolytic cell according to claim 1, characterized in that: It also includes a thin heat insulation plate (4), which covers the furnace surface insulation material (5) at the end of the anode and the furnace surface insulation material (6) directly above the anode, and the thin heat insulation plate (4) abuts against the top of the baffle plate (3).
3. The low heat dissipation device for pot cover of electrolytic cell according to claim 1, characterized in that: The baffle plate (3) is made of a high-temperature resistant, corrosion-resistant, and non-magnetic metal material.
4. The low heat dissipation device for electrolytic cell furnace surface insulation material according to claim 1, characterized in that: The device has a detachable structure.