CN218059249U

CN218059249U - Cathode conducting rod for aluminum electrolytic cell

Info

Publication number: CN218059249U
Application number: CN202222186206.0U
Authority: CN
Inventors: 班允刚; 刘靖; 吴俊龙; 关永军; 毛宇; 毛继红
Original assignee: Northeastern University Engineering and Research Institute Co Ltd
Current assignee: Northeastern University Engineering and Research Institute Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-16
Anticipated expiration: 2032-08-19

Abstract

The utility model relates to a cathode conducting rod for an aluminum electrolytic cell, which comprises a copper core, a steel rod body with a groove and a steel sealing plate, wherein the middle part of the steel rod body with the groove is provided with the groove, the top of the groove is provided with a seam allowance, the copper core is cast in the groove, and the steel sealing plate is welded in the seam allowance; the copper core is a uniform-section or variable-section copper core. The utility model discloses a cast molding's method preparation negative pole conducting rod reduces machining cost by a wide margin, is favorable to reducing the investment, more is favorable to imbedding copper core rod iron technique and promotes.

Description

Cathode conducting rod for aluminum electrolytic cell

Technical Field

The utility model belongs to the technical field of aluminium electrolysis equipment, especially, relate to a cathode conducting rod for aluminium cell.

Background

The electric power cost of domestic aluminum electrolysis enterprises accounts for about 40% of the total cost. The electrolytic aluminum industry is important to improve market competitiveness and save energy and reduce consumption. The ton aluminum direct current consumption is directly proportional to the average cell voltage and inversely proportional to the current efficiency. Therefore, reducing the pressure drop is an important way for reducing the direct current power consumption of the aluminum liquid, and effectively reducing the unit production energy consumption is an important hand for aluminum electrolysis production enterprises to pursue economic benefits in the large-scale process of the aluminum electrolysis cell, and the aluminum electrolysis enterprises are always dedicated to adjusting the production process and adopting new technologies of low temperature and low voltage to realize energy conservation and emission reduction in the production process.

The traditional cathode conducting bars in the aluminum electrolysis industry are generally of two types, one type is made of a steel bar with lower resistance, and the other type is that a copper bar is embedded in the steel bar with lower resistance. The first method uses a steel rod with a lower resistance to produce a steel rod with a higher resistance than the steel rod embedded in the copper rod. Although the copper rod is embedded in the steel rod, the resistance of the cathode conducting rod is greatly reduced, and the power consumption is obviously reduced, the process steps of the method for embedding the copper core in the steel rod are as follows: firstly, the steel bar is drilled with high requirements on the cylindricity, the straightness and the smoothness of the drilled hole, and the copper bar is also drilled with high requirements on the cylindricity, the straightness and the smoothness, so that the machining process with high precision requirements is caused, the machining cost is high, and the popularization of the technology is limited.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects existing in the prior art, the utility model provides a cathode conducting rod for an aluminum electrolytic cell, which is manufactured by adopting a casting forming method, greatly reduces the machining cost, is favorable for reducing the investment and is more favorable for the technical popularization of embedding a copper core steel rod.

A cathode conducting rod for an aluminum electrolytic cell comprises a copper core, a steel rod body with a groove and a steel sealing plate, wherein the middle of the steel rod body with the groove is provided with the groove, the top of the groove is provided with a seam allowance, the copper core is cast in the groove, and the steel sealing plate is welded in the seam allowance; the copper core is a uniform-section or variable-section copper core.

When the process has no requirement on current distribution, the copper core is a uniform-section copper core.

When the process has requirements on current distribution, the copper core is a variable-section copper core, and the upper surface of the groove and the lower surface of the copper core are distributed in a stepped manner or the upper surface of the groove and the lower surface of the copper core are provided with slopes.

The utility model has the advantages that:

1. the utility model discloses a direct casting of copper water forms the mode preparation negative pole conducting rod of copper core, protects the copper core through the welding steel shrouding, and whole course of working does not have the machining precision requirement, and processing is easy, and manufacturing cost is extremely low.

2. The utility model provides a pair of a cathode conducting rod for aluminium cell is copper core rod iron, can effectively reduce the voltage drop of negative pole group, can effectively reduce electrolysis trough running cost.

3. The utility model provides a recess passes through the machine tooling shaping, does not have higher machining precision requirement.

Drawings

Fig. 1 is a schematic structural diagram of a cathode conducting rod for an aluminum electrolytic cell provided in embodiment 1 of the present invention;

FIG. 2 isbase:Sub>A view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of a cathode conducting bar for an aluminum electrolytic cell according to embodiment 2 of the present invention;

FIG. 4 is a view taken along line B-B of FIG. 3;

FIG. 5 is a view from the direction C-C of FIG. 3;

FIG. 6 is a view from D-D of FIG. 3;

fig. 7 is a schematic structural view of a cathode collector bar for an aluminum electrolytic cell according to embodiment 3 of the present invention;

FIG. 8 is a view from E-E of FIG. 7;

wherein the content of the first and second substances,

1-steel closing plate, 2-copper core and 3-steel bar body with groove.

Detailed Description

For better explanation of the present invention, the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings for better understanding.

Example 1

As shown in fig. 1-2, a cathode conducting rod for an aluminum electrolytic cell is installed on a cathode block and comprises a copper core 2, a steel rod body 3 with a groove and a steel sealing plate 1, wherein the middle part of the steel rod body 3 with the groove is provided with the groove, the top of the groove is provided with a seam allowance, the copper core 2 is cast in the groove, and the steel sealing plate 1 is welded in the seam allowance. In the embodiment, the process has no requirement on current distribution, and the copper core 2 is a uniform-section copper core, that is, the cross-sectional area of the copper core 2 along the longitudinal direction is equal in size and does not change.

The manufacturing method of the cathode conducting rod for the aluminum electrolytic cell comprises the following steps:

the method comprises the following steps: the steel bar body is provided with a groove to manufacture a steel bar body 3 with a groove, and the groove is formed by machining, specifically milling; the grooves are grooves with equal cross sections;

step two: before casting, preheating the steel bar body 3 with the groove, and casting molten copper into the groove of the steel bar body 3 with the groove when the temperature reaches 800 ℃ in the embodiment;

step three: in this example, the casting was followed by cooling to 260 ℃;

step four: and welding the steel seal plate 1 outside the groove, namely in the seam allowance at the top of the groove, and protecting the copper core 2.

Example 2

As shown in fig. 3-6, a cathode conducting rod for an aluminum electrolytic cell is installed on a cathode block and comprises a copper core 2, a steel rod body 3 with a groove and a steel sealing plate 1, wherein the middle part of the steel rod body 3 with the groove is provided with the groove, the top of the groove is provided with a seam allowance, the copper core 2 is cast in the groove, and the steel sealing plate 1 is welded in the seam allowance. In the embodiment, the current distribution is required by the process, and the current distribution condition in the aluminum electrolysis process needs to be limited, so that the sizes of the groove sections are different, namely the copper core 2 is a variable-section copper core, namely the cross sections of the copper core 2 along the longitudinal direction are different, the larger the cross section of the copper core 2 is, the smaller the resistance is, and the larger the current distribution is required by the process; the upper surface of the groove and the lower surface of the copper core 2 are distributed in a step shape.

the method comprises the following steps: the steel bar body is provided with a groove to manufacture a steel bar body 3 with a groove, and the groove is formed by machining, specifically milling; the upper surface of the groove is in a step shape;

step two: before casting, preheating the steel bar body 3 with the groove to 750 ℃, and casting molten copper into the groove of the steel bar body 3 with the groove;

step three: cooling to 200 ℃ after casting;

step four: and welding the steel seal plate 1 outside the groove, namely in the rabbet at the top of the groove, and protecting the copper core 2.

Example 3

As shown in fig. 7-8, a cathode conducting rod for an aluminum electrolytic cell is installed on a cathode block, and comprises a copper core 2, a steel rod body 3 with a groove and a steel sealing plate 1, wherein the middle part of the steel rod body 3 with the groove is provided with the groove, the top of the groove is provided with a seam allowance, the copper core 2 is cast in the groove, and the steel sealing plate 1 is welded in the seam allowance. In the embodiment, the process has requirements on current distribution, the copper core 2 is a tapered variable-section copper core, that is, the cross-sectional area of the copper core 2 along the longitudinal direction is equal in size, the larger the cross section of the copper core 2 is, the smaller the resistance is, and the larger the process-required current distribution is; the upper surface of the groove and the lower surface of the copper core 2 are both provided with slopes, and the included angle between the upper surface of the groove and the horizontal plane is more than 0 degree.

the method comprises the following steps: the steel bar body is provided with a groove to manufacture a steel bar body 3 with a groove, and the groove is formed by machining, specifically milling; the upper surface of the groove is provided with a slope;

step two: before casting, preheating the steel bar body 3 with the groove, and casting molten copper into the groove of the steel bar body 3 with the groove when the temperature reaches 850 ℃;

step three: cooling to 300 ℃ after casting;

The step type provided in example 2 and the ramp type provided in example 3 are substantially the same, and the current distribution is further adjusted by adjusting the size of the resistance by adjusting the size of the cross section of the copper core. Therefore, when the current distribution is required by the process, one of the two modes can be selected.

Claims

1. A cathode collector bar for an aluminum electrolysis cell, characterized in that: the steel sealing plate comprises a copper core, a steel bar body with a groove and a steel sealing plate, wherein the groove is formed in the middle of the steel bar body with the groove, a spigot is formed in the top of the groove, the copper core is cast in the groove, and the steel sealing plate is welded in the spigot; the copper core is a uniform-section or variable-section copper core.

2. The cathode collector bar for an aluminum electrolysis cell according to claim 1, wherein: when the process has no requirement on current distribution, the copper core is a uniform-section copper core.

3. The cathode collector bar for aluminum reduction cells as recited in claim 1, wherein: when the process has requirements on current distribution, the copper core is a variable-section copper core, and the upper surface of the groove and the lower surface of the copper core are distributed in a stepped manner or the upper surface of the groove and the lower surface of the copper core are provided with slopes.