Energy-saving anode carbon block for aluminum electrolysis

Abstract

The utility model belongs to the technical field of electrolytic aluminum production, and particularly relates to an energy-saving anode carbon block for aluminum electrolysis, which comprises a carbon block main body, two grooves are longitudinally formed in the bottom of the carbon block main body in a penetrating manner, a carbon block boss is arranged at the top of the carbon block main body, and four uniformly distributed carbon bowls are uniformly arranged on the carbon block boss. A plurality of uniformly distributed spiral grooves are formed in the carbon bowls; a plurality of core grooves are uniformly formed in the top of the carbon block main body, the plurality of core grooves respectively correspond to four corners of the carbon block main body, and the depth of each core groove is 30-50mm; the grooves are formed in the bottom of the carbon block main body, so that the contact area between the carbon block main body and electrolyte is increased, and the current efficiency is improved; the heat preservation material at the top of the anode carbon block is limited through the core groove and the heat preservation material in the core groove, the heat preservation material is prevented from sliding off from the top of the carbon block boss and the top of the carbon block body, and then the anode carbon block is prevented from being exposed in air and oxidized.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic aluminum production technology, specifically relating to an energy-saving anode carbon block for aluminum electrolysis. Background Technology

[0002] Anode carbon blocks are one of the main raw materials in aluminum electrolysis production. They act as conductors to introduce direct current into the electrolytic cell and participate in the anodic reaction as the anode material. The quality indicators of the anode carbon blocks directly affect the normal production of the electrolytic cell and various economic indicators such as the yield, quality, carbon consumption, and power consumption of primary aluminum. In electrolysis production, the lower half of the carbon block is used, while the upper part (approximately 180mm) is unused. After a certain period of use, most of the anode carbon block is consumed and needs to be replaced periodically. Replacement results in a small amount of unused anodes, commonly known as "residual electrodes." After cleaning, the steel claw heads and aluminum conductive rods are recycled for assembling the next new anode carbon block. The used steel... The bottom of the claw is corroded and thinned, and a large amount of molten iron is poured between the steel claw and the new anode carbon block for assembly, which makes it difficult to replace the residual anode. At the same time, when using the anode carbon block, it is necessary to cover it with insulation material to prevent the upper surface of the anode carbon block from being oxidized by contact with air. However, when covering the upper surface of the anode carbon block with insulation material, the insulation material tends to slide down from the top of the anode carbon block, causing the upper surface of the anode carbon block to be exposed to air. When the anode carbon block is immersed in the electrolyte, it reacts with alumina to produce CO and CO2 gases, causing a non-conductive gas film layer to form between the bottom of the anode carbon block and the electrolyte, which in turn increases the power consumption during electrolysis. Utility Model Content

[0003] The purpose of this invention is to provide an energy-saving anode carbon block for aluminum electrolysis, which can prevent the insulation material from sliding off the top of the anode carbon block and avoid oxidation of the anode carbon block.

[0004] The technical solution of this utility model is: an energy-saving anode carbon block for aluminum electrolysis, comprising a carbon block body that is rectangular in shape, with two grooves longitudinally penetrating the bottom of the carbon block body. The two grooves are evenly distributed on the bottom of the carbon block body, dividing the bottom of the carbon block body into three equal parts. The depth of each groove is 300mm and the width of each groove is 12mm.

[0005] The top of the charcoal block body is provided with an integrally formed charcoal block boss. The height of the charcoal block boss is 95mm. Four charcoal bowls are evenly distributed on the charcoal block boss. The four truncated cone-shaped charcoal bowls are arranged horizontally on the charcoal block boss. The depth of each charcoal bowl is 110-120mm, the top diameter of each charcoal bowl is 210-220mm, the bottom diameter of each charcoal bowl is 170-180mm, and the interior of each charcoal bowl is provided with several evenly distributed spiral grooves. The top width of each spiral groove is 16-18mm, and the bottom width of each spiral groove is 14-16mm.

[0006] The top of the carbon block body is evenly provided with multiple core grooves, which correspond to the four corners of the carbon block body respectively. One side of each core groove is connected to the bottom edge of the carbon block boss. The depth of each core groove is 30-50mm.

[0007] Furthermore, the length of the main body of the charcoal block is 1600mm, the width is 700mm, and the total height of the main body of the charcoal block and the charcoal block boss is 650mm; the charcoal block boss is generally gourd-shaped, with a top length of 1200mm, a bottom length of 1420mm, a top width of 370mm, and a bottom width of 550mm.

[0008] Furthermore, the distance between the bottom end of the spiral groove inside the charcoal bowl and the bottom of the charcoal bowl is 5-7mm, and a support protrusion is provided in the middle of the bottom of the charcoal bowl, with a height of 5-7mm.

[0009] Furthermore, all four core grooves are semi-circular grooves with a diameter of 140 mm.

[0010] The beneficial effects of this invention are as follows: By opening grooves at the bottom of the carbon block body, not only is the contact area between the carbon block body and the electrolyte increased, shortening the preheating time of the anode, but also the gas generated during electrolysis can escape, improving current efficiency; the spiral groove guides the molten iron, and the supporting protrusions support the bottom of the steel claws, allowing the molten iron to flow into the gap between the steel claws and the bottom of the carbon bowl, strengthening the connection between the steel claws and the carbon bowl, reducing the amount of molten iron used, and facilitating the cleaning of impurities on the steel claws when replacing the anode carbon block, while effectively reducing the anode depolarization rate during aluminum electrolysis production; the core groove and its internal insulation material effectively block the insulation material on the top of the anode carbon block, preventing the insulation material from sliding off the carbon block protrusions and the top of the carbon block body, thus preventing the anode carbon block from being oxidized due to exposure to air. At the same time, the core groove is opened in the part of the anode carbon block that does not participate in the electrolysis reaction, so it will not have a negative impact on the conductivity and replacement cycle of the anode carbon block. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a side view of the present invention;

[0013] Figure 2 This is a top view of the present invention;

[0014] Figure 3 This is a cross-sectional view of one side of the present invention;

[0015] Figure 4 for Figure 3 A magnified view of a portion of point I in the middle;

[0016] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0017] Figure 6 for Figure 4 Cross-sectional view at point BB;

[0018] Figure 7 for Figure 2 Cross-sectional view at point CC. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "side," "end," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1-7 As shown, an energy-saving anode carbon block for aluminum electrolysis includes a rectangular carbon block body 1. Two grooves 2 are longitudinally opened through the bottom of the carbon block body 1. The two grooves 2 are evenly opened at the bottom of the carbon block body 1, dividing the bottom of the carbon block body 1 into three equal parts. The depth of each groove 2 is 300mm and the width of each groove 2 is 12mm.

[0022] Based on the embodiment shown, by opening a groove 2 at the bottom of the carbon block body, not only is the weight of the anode carbon block reduced, but the contact area between the carbon block body 1 and the electrolyte is increased, and the preheating time of the anode is shortened. In addition, the gas generated during the electrolysis process can escape, thereby improving the current efficiency. The anode carbon block adopts a grooved block design, that is, the groove 2 is opened at the bottom of the carbon block body 1 after calcination, which can avoid affecting the replacement cycle of the anode carbon block.

[0023] In this embodiment, as Figure 2-3 As shown, the length of the charcoal block body 1 is 1600mm and the width is 700mm. The top of the charcoal block body 1 is provided with a charcoal block boss 3 integrally formed therewith. The height of the charcoal block boss 3 is 95mm. The total height of the charcoal block body 1 and the charcoal block boss 3 is 650mm. The charcoal block boss 3 is gourd-shaped. The top length of the charcoal block boss 3 is 1200mm, the bottom length is 1420mm, the top width is 370mm, and the bottom width is 550mm.

[0024] Based on the above embodiments, since the carbon block boss 3 has minimal impact on the conductivity of the anode and does not affect the conductivity function, and will not cause a depolarization accident, after a large number of experiments, it was found that reducing the top length of the carbon block boss to 1200mm and its bottom length to 1420mm can not only reduce the weight of the carbon block boss 3, thereby reducing the weight of the anode carbon block, but also ensure that the residual electrode thickness can guarantee that the bottom of the carbon bowl does not have the phenomenon of bottom filling or claw melting, and does not produce impurities that interfere with the quality of the primary aluminum.

[0025] In this embodiment, as Figure 3-6 As shown, four evenly distributed charcoal bowls 4 are evenly distributed on the charcoal block protrusion 3. The four truncated cone-shaped charcoal bowls 4 are arranged horizontally on the charcoal block protrusion 3. The depth of each charcoal bowl 4 is 110-120mm, the top diameter of each charcoal bowl 4 is 210-220mm, the bottom diameter of each charcoal bowl 4 is 170-180mm, and the interior of each charcoal bowl 4 is provided with several evenly distributed spiral grooves 5. The top width L1 of each spiral groove 5 is 16-18mm, and the bottom width L2 of each spiral groove 5 is 14-16mm.

[0026] The distance between the bottom end of the spiral groove 5 inside the charcoal bowl 4 and the bottom of the charcoal bowl 4 is 5-7mm. A support protrusion 6 is provided in the middle of the bottom of the charcoal bowl 4, and the height of the support protrusion 6 is 5-7mm.

[0027] Based on the above embodiments, when the steel claw is poured into the carbon bowl 4 with molten iron, the structure of the carbon bowl 4, which is wider at the top and narrower at the bottom, facilitates the pouring of molten iron into the carbon bowl 4. At the same time, the spiral groove 5 guides the flow of molten iron, making it easier for the molten iron to flow into the bottom of the carbon bowl 4. The support protrusion 6 supports the bottom of the steel claw, allowing the molten iron to flow into the gap between the steel claw and the bottom of the carbon bowl 4, strengthening the connection between the steel claw and the carbon bowl 4, reducing the amount of molten iron used, and making it easier to clean impurities on the steel claw when replacing the anode carbon block.

[0028] Furthermore, the carbon bowl 4 is the core area connecting the anode and the guide rod. Its size directly affects the current conduction efficiency and mechanical stability. The diameter of the carbon bowl 4 matches the diameter of the guide rod, and sufficient contact area must be ensured to reduce the connection resistance. Therefore, the diameter of the carbon bowl D≈d+2×t, where d is the diameter of the guide rod and t is the wall thickness of the carbon bowl. The wall thickness of the carbon bowl is adjusted according to the current density and the coefficient of thermal expansion. At the same time, the diameter of the carbon bowl must meet the requirements of uniform current distribution. Moreover, in order to avoid the carbon bowl cracking due to excessively thin walls, the wall thickness of the carbon bowl is ≥15% of the width of the anode carbon block. In order to ensure the stability of the anode guide rod after it is inserted into the carbon bowl 4, and to avoid the anode guide rod being inserted too deeply, which would reduce the strength of the anode carbon block, the depth of the carbon bowl 4 is approximately 30% to 50% of the height of the anode carbon block.

[0029] In this embodiment, as Figure 2 , Figure 7 As shown, multiple core grooves 7 are evenly provided on the top of the carbon block body 1. The multiple core grooves 7 correspond to the four corners of the carbon block body 1 respectively. One side of each of the multiple core grooves 7 is connected to the bottom edge of the carbon block boss 3. The depth of each core groove 7 is 30-50mm.

[0030] Among them, the four core grooves 7 are all semi-circular grooves with a diameter of 140mm.

[0031] Based on the above embodiments, when covering the top of the anode carbon block with insulation material, the insulation material is poured onto the carbon block body 1 and the carbon block protrusion 3. The insulation material is shaped on the carbon block body 1 and the carbon block protrusion 3. During this process, some insulation material enters the interior of the core groove 7. After the insulation material is shaped, the insulation material on the top of the anode carbon block is blocked by the core groove 7 and the insulation material inside it, so as to prevent the insulation material from sliding off the top of the carbon block protrusion 3 and the carbon block body 1, thereby preventing the anode carbon block from being oxidized due to exposure to air. At the same time, the core groove 7 is opened in the part of the anode carbon block that does not participate in the electrolytic reaction, so it will not affect the conductivity and replacement cycle of the anode carbon block.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving anode carbon block for aluminum electrolysis, comprising a rectangular carbon block body, characterized in that, The bottom of the carbon block body has two longitudinally penetrating grooves. The two grooves are evenly distributed on the bottom of the carbon block body, dividing the bottom of the carbon block body into three equal parts. The depth of each groove is 300mm and the width of each groove is 12mm. The top of the charcoal block body is provided with an integrally formed charcoal block boss. The height of the charcoal block boss is 95mm. Four charcoal bowls are evenly distributed on the charcoal block boss. The four truncated cone-shaped charcoal bowls are arranged horizontally on the charcoal block boss. The depth of each charcoal bowl is 110-120mm, the top diameter of each charcoal bowl is 210-220mm, the bottom diameter of each charcoal bowl is 170-180mm, and the interior of each charcoal bowl is provided with several evenly distributed spiral grooves. The top width of each spiral groove is 16-18mm, and the bottom width of each spiral groove is 14-16mm. The top of the carbon block body is evenly provided with multiple core grooves, which correspond to the four corners of the carbon block body respectively. One side of each core groove is connected to the bottom edge of the carbon block boss. The depth of each core groove is 30-50mm.

2. The energy-saving anode carbon block for aluminum electrolysis according to claim 1, characterized in that, The length of the main body of the charcoal block is 1600mm, the width is 700mm, and the total height of the main body of the charcoal block and the charcoal block boss is 650mm. The charcoal block boss is gourd-shaped, with a top length of 1200mm, a bottom length of 1420mm, a top width of 370mm, and a bottom width of 550mm.

3. The energy-saving anode carbon block for aluminum electrolysis according to claim 2, characterized in that, The distance between the bottom end of the spiral groove inside the charcoal bowl and the bottom of the charcoal bowl is 5-7mm. A support protrusion is provided in the middle of the bottom of the charcoal bowl, and the height of the support protrusion is 5-7mm.

4. The energy-saving anode carbon block for aluminum electrolysis according to claim 3, characterized in that, All four core grooves are semi-circular grooves with a diameter of 140 mm.

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