CN218059250U

CN218059250U - Strong heat-preservation anti-oxidation anode structure

Info

Publication number: CN218059250U
Application number: CN202221019254.4U
Authority: CN
Inventors: 胡国静; 冯钢军
Original assignee: Henan Lutianhe Energy Saving And Environmental Protection Technology Co ltd; Henan Hecheng Inorganic New Material Co ltd
Current assignee: Henan Lutianhe Energy Saving And Environmental Protection Technology Co ltd; Henan Hecheng Inorganic New Material Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-12-16
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses a strong anti-oxidation type anode structure that keeps warm, carries out anti-oxidation treatment through the oxidation barrier to the positive pole carbon piece through the heat preservation, thereby has solved the technical problem that current positive pole structure thermal insulation performance is poor, easy oxidation leads to the energy consumption to be high. The anode structure mainly comprises an anode guide rod, wherein the anode guide rod is connected with an anode carbon block through an anode steel claw, the anode carbon block is provided with a heat insulation layer, the heat insulation layer comprises a heat insulation part and supporting parts arranged at two ends of the heat insulation part, and the heat insulation part is provided with claw holes corresponding to the anode steel claw in the direction of the anode steel claw, so that the anode steel claw penetrates through the claw holes to be connected with the anode carbon block; and the surface of the anode carbon block is sprayed with an anti-oxidation layer to slow down the oxidation speed. The heat preservation layer is arranged, and the anti-oxidation layer is sprayed on the anode carbon block, so that the heat preservation performance and the anti-oxidation performance of the anode structure are effectively improved, the hair loss of the anode carbon block is reduced, and the energy consumption in the process of electrolyzing aluminum is reduced.

Description

Strong heat-preservation anti-oxidation anode structure

Technical Field

The utility model relates to the technical field of electrolytic aluminum production equipment, in particular to a strong heat-preservation anti-oxidation anode structure.

Background

In the electrolysis industry, aluminum oxide is electrolyzed to produce aluminum by using a Hall-Heroult electrolytic cell as an anode and cryolite molten salt as electrolyte. The prior art generally adopts electrolyte and alumina mixed powder block covering materials to preserve heat of the anode and simultaneously reduce anodic oxidation. Because the covering material has a large heat conductivity coefficient which is generally 1-4W/m.K and low compactness, the temperature of the anode covering material is higher and higher along with the consumption of the anode, and the anode covering material is gradually hardened and gradually melted in the later period, so that a good heat insulation effect cannot be achieved. Most of heat of the electrolytic cell is dissipated through the upper part of the electrolytic cell, the heat dissipation of the upper part of the anode accounts for about 64 percent of the total heat dissipation, which is reduced to 1.37V, the heat dissipation is large, and the energy waste is serious.

The anode thermal insulation material has very bad use working conditions, not only faces the high temperature of more than 900 ℃, but also faces the scouring of the molten cryolite electrolyte and the corrosion of fluoride steam. The corrosivity of the molten cryolite is extremely strong, and the molten cryolite is difficult to resist by common high-temperature materials, so that the technical bottleneck that the high-efficiency heat preservation of the anode cannot be solved in the electrolytic aluminum industry all the time is also the bottleneck.

The anode heat-insulating material must keep the position of a feeding point communicated with the atmosphere to ensure that the alumina raw material is smoothly added into the electrolyte, but the prior anode structure is difficult to realize sealing and air isolation, and the oxidation rate of the carbon anode is higher at high temperature. The heat insulating material is difficult to be recycled under the working condition of the electrolytic cell for a long time, and the aims of reducing energy consumption and anodic oxidation can not be fulfilled. Therefore, a strong heat-preservation and oxidation-prevention anode structure needs to be developed and designed.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

In view of at least one of the above problems, the application provides a strong heat preservation anti-oxidation type anode structure, which preserves heat of an anode carbon block through a heat preservation layer, and carries out anti-oxidation treatment on the anode carbon block through an anti-oxidation layer, thereby solving the technical problem that the existing anode structure has poor heat preservation performance and is easy to oxidize, thereby leading to high energy consumption.

According to one aspect of the application, a strong heat-preservation anti-oxidation anode structure is provided, which mainly comprises an anode guide rod, wherein the anode guide rod is connected with an anode carbon block through an anode steel claw, a heat-preservation layer is arranged on the anode carbon block, the heat-preservation layer comprises a heat-preservation part and supporting parts arranged at two ends of the heat-preservation part, and claw holes corresponding to the anode steel claw are arranged on the heat-preservation part, so that the anode steel claw penetrates through the claw holes to be connected with the anode carbon block; and an anti-oxidation layer is sprayed on the surface of the anode carbon block to slow down the oxidation speed.

In some embodiments of the present application, a thermal insulation block for enhancing a thermal insulation effect is disposed between the edge portion of the thermal insulation layer and the thermal insulation layer of the adjacent anode structure.

In some embodiments of the present application, the insulating layer and the insulating block are made of calcium silicate, alumina fiber board or/and mullite fiber board.

In some embodiments of the present application, the thickness of the insulating layer and the insulating block is 3-8cm.

In some embodiments of the present application, the shape of the heat-insulating block corresponds to the shape of the placement portion, and is triangular prism-shaped or/and rectangular parallelepiped-shaped to fit the local heat-insulating position.

In some embodiments of the present application, the material of the oxidation preventing layer is an alumina-based functional ceramic oxidation preventing material, and the spraying thickness is 0.2-0.4mm.

Compared with the prior art, the utility model discloses a main beneficial technological effect lies in:

1. according to the heat-insulating layer, the heat-insulating layer is arranged on the anode carbon block, heat-insulating treatment is carried out on the anode carbon block, the heat-insulating layer is made of calcium silicate, alumina fiber board or mullite fiber board, the heat-insulating layer can be recycled for a long time, and the heat conductivity coefficient of the heat-insulating layer is as high as 0.1-0.3W/m.K, so that the heat-insulating effect is improved by dozens of times.

2. When the anode carbon block is subjected to heat preservation treatment, the oxidation preventing layer made of the alumina-based functional ceramic oxidation preventing material is sprayed on the surface of the anode carbon block, so that high-temperature air and carbon dioxide gas are effectively isolated, the oxidation of the anode carbon block is effectively slowed down, the anode hair loss is reduced, the content of carbon slag in electrolyte is reduced, the electrolyte conductivity is improved, and the energy consumption is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

FIG. 2 is a schematic structural view of an insulation layer according to an embodiment of the present application.

Fig. 3 is a schematic structural view of a heat retaining portion according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of an operating state according to an embodiment of the present application.

In the above figures, 1 is an anode guide rod, 2 is an anode steel claw, 21 is an explosive welding piece, 3 is a heat-insulating layer, 31 is a heat-insulating part, 32 is a claw hole, 33 is a supporting part, 4 is a heat-insulating block, 5 is an anode carbon block, 6 is an electrolytic cell, and 7 is electrolyte.

Detailed Description

The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.

In the description of the present invention, it should be understood that the directions or positional relationships indicated as referring to the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing technical solutions and simplifying the description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed in a specific direction and operation, and thus, should not be construed as limiting the present invention.

Example 1: the embodiment discloses a strong heat preservation type anti-oxidation anode structure, which is characterized in that an anode carbon block 5 is subjected to heat preservation through a heat preservation layer 3, and the anode carbon block 5 is subjected to anti-oxidation treatment through an anti-oxidation layer, so that the technical problem of high energy consumption caused by poor heat preservation performance and easiness in oxidation of the conventional anode structure is solved. Referring to fig. 1, the structure mainly comprises an anode guide rod 1, the anode guide rod 1 is connected with an anode carbon block 5 through an anode steel claw 2, the anode guide rod 1 is connected with the anode steel claw 2 through an explosion soldering lug 21, an insulating layer 3 is arranged on the anode carbon block 5, as shown in fig. 2, the insulating layer 3 comprises an insulating part 31 and supporting parts 33 arranged at two ends of the insulating part 31, a claw hole 32 corresponding to the anode steel claw 2 is arranged on the insulating part 31, so that the anode steel claw 2 penetrates through the claw hole 32 to be connected with the anode carbon block 5, the insulating layer 3 can be assembled in blocks, as shown in fig. 3, the insulating layer 3 is divided into two blocks along the claw hole 32, and when in use, the insulating layer is spliced for use, so that the installation is convenient.

Furthermore, the edge part of the heat-insulating layer 3, the heat-insulating layers 3 of the adjacent anode structures and the middle seam between the new anode carbon block 5 and the opposite residual anode carbon block 5 are all provided with heat-insulating blocks 4 for enhancing the heat-insulating effect; the shape of the heat-insulating block 4 corresponds to the shape of the placement part, and the heat-insulating block is triangular prism-shaped or rectangular so as to better fit the local heat-insulating position; the insulating layer 3 and the insulating block 4 are made of calcium silicate materials and can be recycled, the insulating layer 3 replaces the existing powder block covering material, and the powder block covering material cannot fall into the electrolyte 7 during pole changing, so that the material raking, feeding and block fishing are not needed, and the traditional operation mode is thoroughly changed; the transportation and crushing processes of the powder-shaped heat-insulating material are saved or greatly reduced, the production cost and the labor intensity are reduced, and the working efficiency is improved; and the heat conductivity coefficient of the heat-insulating layer 3 is as high as 0.1-0.3W/m.K, which is 10-40 times higher than the existing heat-insulating effect.

Further, an anti-oxidation layer is sprayed on the surface of the anode carbon block 5 to slow down the oxidation speed of the anode carbon block, the anti-oxidation layer is made of an alumina-based functional ceramic anti-oxidation material, an airless sprayer can be used for spraying during spraying, the spraying thickness is 0.2-0.4mm, the spraying is not carried out within a range that the bottom surface and the side surface of the anode carbon block 5 are ten centimeters away from the bottom, the functional ceramic material is prevented from influencing the conductivity of the anode carbon block 5, the anti-oxidation layer effectively isolates high-temperature air and carbon dioxide gas, the oxidation of the anode carbon block 5 is slowed down, the hair loss of the anode carbon block 5 is reduced, the carbon residue content in the electrolyte 7 is reduced, the conductivity of the electrolyte 7 is improved, and the energy consumption is reduced.

The operation and use method of the strong heat preservation and oxidation prevention type anode structure is as follows (see fig. 4):

spraying an alumina-based functional ceramic anti-oxidation material on the surface of an anode carbon block 5 by using an airless sprayer, wherein the spraying thickness is 0.3mm, then putting the anode carbon block 5 sprayed with an anti-oxidation layer into an electrolytic bath 6, hanging the anode carbon block on an anode guide rod 1 through an anode steel claw 2, installing a heat insulation layer 3 and a heat insulation block 4 at corresponding positions, and carrying out aluminum electrolysis operation after the heat insulation measure is finished; when the anode carbon block 5 is used for changing the electrode, the heat insulation block 4 is taken down firstly after the number of days of use of the anode carbon block 5 is reached, then the residual anode carbon block 5 and the heat insulation layer 3 are taken down together, after the residual anode carbon block is cooled, the anode carbon block 5 is separated from the heat insulation layer 3, and the heat insulation layer 3 is simply cleaned, so that the residual anode carbon block can be reused.

The present invention has been described in detail with reference to the drawings and the embodiments, however, those skilled in the art can understand that, without departing from the technical concept of the present invention, various specific parameters in the embodiments can be changed, or equivalent substitutions can be made on related components, structures and materials, thereby forming a plurality of specific embodiments, which are common variations of the present invention, and detailed description is not given herein.

Claims

1. A strong heat preservation anti-oxidation type anode structure is characterized by comprising an anode guide rod, wherein the anode guide rod is connected with an anode carbon block through an anode steel claw, the anode carbon block is provided with a heat preservation layer, the heat preservation layer comprises a heat preservation part and support parts arranged at two ends of the heat preservation part, and the heat preservation part is provided with claw holes corresponding to the anode steel claw in the direction of the anode steel claw, so that the anode steel claw penetrates through the claw holes to be connected with the anode carbon block; and an anti-oxidation layer is sprayed on the surface of the anode carbon block.

2. The anode structure with strong heat preservation and anti-oxidation functions as claimed in claim 1, wherein a heat preservation block for enhancing the heat preservation effect is arranged at the edge of the heat preservation layer or/and between the heat preservation layers of the adjacent anode structures.

3. The anode structure of claim 2, wherein the insulating layer and/or the insulating block is made of calcium silicate, alumina fiber board or mullite fiber board.

4. The anode structure of claim 3, wherein the thickness of the insulating layer and the insulating block is 3-8cm.

5. The anode structure of claim 2, wherein the shape of the insulating block corresponds to the shape of the placement portion, and is a triangular prism or a rectangular parallelepiped to fit the local insulating position.

6. The anode structure of claim 1, wherein the oxidation preventing layer is made of alumina-based functional ceramic oxidation preventing material with a thickness of 0.2-0.4mm.