CN214218879U - Oxidation-resistant aluminum electrolysis anode - Google Patents
Oxidation-resistant aluminum electrolysis anode Download PDFInfo
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- CN214218879U CN214218879U CN202120156470.2U CN202120156470U CN214218879U CN 214218879 U CN214218879 U CN 214218879U CN 202120156470 U CN202120156470 U CN 202120156470U CN 214218879 U CN214218879 U CN 214218879U
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Abstract
The utility model discloses an anti-oxidation aluminum electrolysis anode, which comprises an anode, a top cover, a steel claw and a guide rod group, wherein the top cover covers the top end of the anode, and the anode is provided with a front end surface, a rear end surface, a left side surface and a right side surface; the end face, the side face and the edges of the anode, the surface of the top cover and the surface of the steel claw are coated with a layer of anti-oxidation coating made of the same material, and the anti-oxidation coating completely covers the end face, the side face, the edges and the edges of the anode, the surface of the top cover and the surface of the steel claw to form an anti-oxidation structure. The utility model adopts the high temperature resistant anti-oxidation coating material which has the same components with the aluminum electrolyte to treat the surface of the carbon anode group, thereby not only improving the oxidation resistance of the anode and ensuring the integrity of the anode group residual anode, but also being easy to realize; through the full-wrapping type coating anti-oxidation coating on the surface of the carbon anode, the edge angle, the top cover and the steel claw, the oxidation of the carbon anode on the aluminum electrolytic cell can be reduced to a great extent, the integrity of the anode group stub is ensured, and the claw is avoided.
Description
Technical Field
The utility model relates to the technical field of anode electrolysis, in particular to an oxidation-resistant anode for aluminum electrolysis.
Background
The carbon anode plays double roles of conducting and participating in electrochemical reaction in the process of electrolyzing the aluminum oxide-cryolite molten salt, and directly influences economic and technical indexes of normal production operation, quality and current efficiency of raw aluminum, energy consumption and the like of aluminum electrolysis. The anode accounts for about 13% of the production cost of the electrolytic aluminum, and a large amount of greenhouse gas (CO) is generated in the aluminum electrolysis production process2). Because the consumption of anode oxidation, volatilization and shedding is about 70-100 kg/t-Al, firstly, the modern large-scale aluminum electrolytic cell adopts the intermediate blanking design, and the oxidation of the exposed parts of the end face, the side face and the corner of the anode at the fire hole where the crust breaking head is positioned accounts for 50 percent of the anode of the whole electrolytic cell; and secondly, the corner anode, the side part of the anode and the top cover form gaps due to different particle sizes of the heat insulating material and are in contact oxidation with air. Anodic oxidation can cause the increase of anode current density, anode consumption is accelerated, the shape of the anode scrap is irregular, the anode scrap penetrates through the bottom claw, the quality of the original aluminum slides down, the wire rate of the anode guide rod assembly of the system is increased, and the production cost is increased.
In the prior art, the problems are solved by adopting methods of pouring electrolyte, supplementing plugging at any time and the like, the time and the labor are wasted, great potential safety hazards exist, and meanwhile, the effect is poor.
The prior art discloses an aluminum electrolysis cell anode, which can achieve the effect of reducing anodic oxidation, but is affected by temperature, and the anode temperature exceeds 50 ℃, so that the anode can be layered and cracked, and the on-line automatic operation can not be realized; when the environmental temperature is lower than 0 ℃, the fluidity and the atomization performance are reduced, the operation is interrupted, and the continuous operation cannot be implemented; the adoption of the technical raw material can cause the content of the original aluminum and the silicon to be increased by 0.01 percent.
Therefore, there is a particular need for an aluminum electrolysis oxidation resistant anode that solves the above-mentioned existing problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to the defect of prior art, provide an oxidation-resistant aluminium electrolysis positive pole that realizes that simple structure, exhaust efficiency are high, usable negative pressure take out the anode gas fast.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an anti-oxidant aluminium electroloysis positive pole, includes positive pole, top cap, steel claw and guide bar group, and the top cap lid is in the top of positive pole, and the positive pole has terminal surface around with the side of controlling, its characterized in that: the end face, the side face and the edges of the anode, the surface of the top cover and the surface of the steel claw are coated with a layer of anti-oxidation coating made of the same material, and the anti-oxidation coating completely covers the end face, the side face, the edges and the edges of the anode, the surface of the top cover and the surface of the steel claw to form an anti-oxidation structure for the anode, the top cover and the steel claw.
Furthermore, the anti-oxidation coating is formed by coating the end face, the side face and the corner of the anode, the surface of the top cover and the surface of the steel claw by adopting a high-temperature-resistant anti-oxidation coating material with the same components as the aluminum electrolyte.
Furthermore, a chamfer is arranged at the position where the end face is connected with the side face, end face edges and corners are respectively formed on the two sides of the chamfer and the edge of the upper end of the end face, and the chamfer and the end face edges and corners are coated with antioxidant coatings.
Further, the upper edge of side is formed with the side edges and corners, and the side edges and corners coating has anti-oxidant coating.
Furthermore, the top cover comprises a top cover edge angle, a top cover plane and an inclined plane, wherein the top and the bottom of the inclined plane are both the top cover plane, and the inclined plane forms a transition surface between the upper top cover plane and the lower top cover plane; the top cover edges are formed at the butt joint part of the adjacent inclined planes and the butt joint part of the inclined planes and the top cover plane, and the top cover plane below is flush with the end face edges of the upper edges of the end faces and the side face edges of the upper edges of the side faces; the edges and corners, the inclined plane and the plane of the top cover are coated with high-temperature-resistant anti-oxidation coating materials to form an anti-oxidation coating.
Preferably, the entire anode is a square structure including front and rear end faces and left and right side faces.
Preferably, the top cover comprises four inclined planes corresponding to the square anode, wherein two opposite inclined planes correspond to the front end face and the rear end face, and the other two opposite inclined planes correspond to the left side face and the right side face.
Preferably, the thickness of the oxidation resistant coating is 0.5 mm.
The utility model adopts the high temperature resistant anti-oxidation coating material which has the same components with the aluminum electrolyte to treat the surface of the carbon anode group, thereby not only improving the anode oxidation resistance and ensuring the integrity of the anode group residual anode, but also being easy to realize and saving the cost; through the full-wrapping type coating anti-oxidation coating on the surface of the carbon anode, the edge angle, the top cover and the steel claw, the oxidation of the carbon anode on the aluminum electrolytic cell can be reduced to a great extent, the integrity of the anode group stub is ensured, and the claw is avoided.
Drawings
FIG. 1 is a schematic front view of the present invention;
fig. 2 is a schematic side view of the present invention.
In the figure, 1 is an anode, 11 is an end face, 12 is a side face, 13 is an end face corner, 14 is a chamfer, 15 is a side face corner, 2 is a top cover, 21 is a top cover corner, 22 is an inclined face, 23 is a top cover plane, and 3 is a steel claw.
Detailed Description
The invention will be further explained by the following embodiments with reference to fig. 1 and 2:
in this embodiment, anti-oxidation aluminum electrolysis anode, including positive pole 1, top cap 2, steel claw 3 and guide bar group, top cap 2 lid is on the top of positive pole 1, positive pole 1 has terminal surface 11 and the side 12 of controlling around, at the terminal surface 11 of positive pole 1, side 12, the edges and corners, and the surface of top cap 2 and the surface of steel claw 3 all coat with the anti-oxidation coating of the same material of one deck, cover the terminal surface 11 of positive pole 1 completely through anti-oxidation coating, side 12, the edges and corners and the surface of top cap 2 and the surface of steel claw 3, form the anti-oxidation structure to positive pole 1, top cap 2 and steel claw 3.
In this embodiment, the front and rear end faces 11 include end face corners 13 and chamfers 14, and the end face corners 13 and chamfers 14 are coated with a high temperature-resistant and oxidation-resistant coating material.
The end face edge angle 13 and the chamfer 14 are break openings of anodic oxidation, the end face 11 is a main part of anodic oxidation, and the function of isolating air can be achieved by coating the end face edge angle 13, the chamfer 14 and the end face 11 with a high-temperature-resistant anti-oxidation coating material.
In the embodiment, the steel claw 3 is coated with a high-temperature-resistant and oxidation-resistant coating material, and plays a role of isolating air.
In this embodiment, the top cap 2 includes a top cap corner 21, an inclined surface 22 and a top cap plane 23, and the top cap corner 21, the top cap plane 23 and the inclined surface 22 are all coated with a high temperature resistant and oxidation resistant coating material.
The top cover edges 21 and the inclined planes 22 are break-through openings of anodic oxidation, the top cover planes 23 are main parts of anodic oxidation, and the top cover edges 21, the top cover planes 23 and the inclined planes 22 are coated by using high-temperature-resistant and oxidation-resistant coating materials to achieve the effect of isolating air.
In this embodiment, the side surface 12 includes a side edge 15, and the side edge 15 and the side surface 12 are coated with a high temperature resistant and oxidation resistant coating material.
The side edge 15 is a break of the anodic oxidation, the side 12 is a main part of the anodic oxidation, and the side edge 15 and the side 12 are coated with a high-temperature-resistant and oxidation-resistant coating material to isolate the air.
The operation steps for forming the oxidation resistant coating are as follows:
adjusting the distance between the anode groups to be more than 1 m at the tail end of the anode group casting line, and cleaning the surfaces of the anode groups;
uniformly spraying a high-temperature-resistant anti-oxidation coating material to the steel claw 3, wherein the thickness of the coating is 0.5 mm;
uniformly spraying a high-temperature-resistant anti-oxidation coating material to the top cover 2, wherein the thickness of the coating material is 0.5 mm;
uniformly spraying a high-temperature-resistant anti-oxidation coating material on the two side surfaces 12, wherein the thickness is 0.5 mm;
uniformly spraying a high-temperature-resistant anti-oxidation coating material to the two end faces 11, wherein the thickness is 0.5 mm;
the anode is placed on an anode tray and is left standing for 24 hours, and then the anode can be installed on an electrolytic cell for use.
Therefore, in the whole working process of the aluminum electrolysis anti-oxidation anode group, the two end surfaces 11, the two side surfaces 12, the steel claws 3 and the top cover 2 are always protected.
The high-temperature-resistant and oxidation-resistant coating material can be ZS-1021 graphite high-temperature oxidation-resistant coating, has the advantages of good curing effect, compact coating, capability of forming an integrated structure with a matrix, good adhesive force, smoothness, fullness and compactness of the coating, good self-cleaning and adhesion-resistant performance, good thermal shock resistance and creep resistance, good self-healing repair capability on thermal expansion and cold contraction, resistance to erosion of slag and high-temperature impurities and permeation erosion, oxygen diffusion resistance of over 96 percent, and long service life of the material for oxidation resistance at high temperature.
For example, after a certain company 400KA aluminum electrolytic cell uses a gamma-based high-temperature-resistant anti-oxidation coating anode, the net anode consumption is reduced by 7.7kg/t-Al, the content of original aluminum and iron is reduced by 0.022%, and the lower rate of a guide rod is reduced by 2.3%.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.
Claims (8)
1. The utility model provides an anti-oxidant aluminium electroloysis positive pole, includes positive pole, top cap, steel claw and guide bar group, and the top cap lid is in the top of positive pole, and the positive pole has terminal surface around with the side of controlling, its characterized in that: the end face, the side face and the edges of the anode, the surface of the top cover and the surface of the steel claw are coated with a layer of anti-oxidation coating made of the same material, and the anti-oxidation coating completely covers the end face, the side face, the edges and the edges of the anode, the surface of the top cover and the surface of the steel claw to form an anti-oxidation structure for the anode, the top cover and the steel claw.
2. The oxidation-resistant aluminum electrolysis anode according to claim 1, wherein: the anti-oxidation coating is formed by coating the high-temperature resistant anti-oxidation coating material which has the same components as the aluminum electrolyte on the end surface, the side surface and the corner angle of the anode, the surface of the top cover and the surface of the steel claw.
3. The oxidation-resistant aluminum electrolysis anode according to claim 1, wherein: and a chamfer is arranged at the position where the end face is connected with the side face, end face edges and corners are respectively formed on the two sides of the chamfer and the edge of the upper end of the end face, and the chamfer and the end face edges and corners are coated with an antioxidant coating.
4. The oxidation-resistant aluminum electrolysis anode according to claim 3, wherein: the upper edge of side is formed with side edges and corners, and side edges and corners coating has the anti-oxidant coating.
5. The oxidation-resistant aluminum electrolysis anode according to claim 4, wherein: the top cover comprises a top cover edge angle, a top cover plane and an inclined plane, wherein the top and the bottom of the inclined plane are both the top cover plane, and the inclined plane forms a transition surface between the upper top cover plane and the lower top cover plane; the top cover edges are formed at the butt joint part of the adjacent inclined planes and the butt joint part of the inclined planes and the top cover plane, and the top cover plane below is flush with the end face edges of the upper edges of the end faces and the side face edges of the upper edges of the side faces; the edges and corners, the inclined plane and the plane of the top cover are coated with high-temperature-resistant anti-oxidation coating materials to form an anti-oxidation coating.
6. The oxidation-resistant aluminum electrolysis anode according to claim 5, wherein: the whole anode is of a square structure and comprises a front end face, a rear end face, a left side face and a right side face.
7. The oxidation-resistant aluminum electrolysis anode according to claim 6, wherein: the top cover comprises four inclined planes corresponding to the square anode, wherein two opposite inclined planes correspond to the front end face and the rear end face, and the other two opposite inclined planes correspond to the left side face and the right side face.
8. The oxidation-resistant aluminum electrolysis anode according to claim 5, wherein: the thickness of the anti-oxidation coating is 0.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120156470.2U CN214218879U (en) | 2021-01-20 | 2021-01-20 | Oxidation-resistant aluminum electrolysis anode |
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| CN202120156470.2U CN214218879U (en) | 2021-01-20 | 2021-01-20 | Oxidation-resistant aluminum electrolysis anode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114031412A (en) * | 2021-12-08 | 2022-02-11 | 钢城集团凉山瑞海实业有限公司 | Spray paint for large nozzle of semisteel tank and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114031412A (en) * | 2021-12-08 | 2022-02-11 | 钢城集团凉山瑞海实业有限公司 | Spray paint for large nozzle of semisteel tank and preparation method thereof |
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