Aluminum electrolysis cell adapting to voltage swing classification

Abstract

The utility model relates to an aluminum electrolysis cell adapting to voltage swing grading, which comprises a lifting mechanism, the lifting mechanism comprises a plurality of first lifting supports which are arranged at intervals along the front-back direction and can move up and down, and the first lifting supports are driven by a first lifting power source. The lifting mechanism further comprises a plurality of second lifting supports arranged at intervals in the front-back direction, each first lifting support corresponds to at least two second lifting supports, each second lifting support is driven by a second lifting power source arranged on the corresponding first lifting support, each second lifting support is connected with at least two anode guide rods, and the anode guide rods are connected with the anode guide rods. The anode bus comprises rigid buses connected between the anode guide rods on the second lifting supports and further comprises flexible buses connected between the rigid buses between the adjacent second lifting supports. The utility model solves the technical problem that the lifting heights of the anode guide rods are consistent and cannot adapt to voltage swing grading in the prior art.

Description

Technical Field

[0001] The utility model relates to the field of aluminum electrolysis production, in particular to an aluminum electrolysis cell adaptable to voltage swing grading. Background Art

[0002] Electrolytic aluminum is aluminum obtained by electrolysis. Modern electrolytic aluminum industry production adopts cryolite-alumina molten salt electrolysis method. Molten cryolite is the solvent, alumina is the solute, carbonite is the anode, and aluminum liquid is the cathode. After a strong direct current is passed through, an electrochemical reaction is carried out at the two electrodes in the electrolytic cell at 950℃~970℃, which is electrolysis.

[0003] Aluminum electrolysis cell is the main equipment for electrolyzing aluminum. In the prior art, aluminum electrolysis cell includes a cell body extending in the front-to-back direction, and also includes a plurality of anode assemblies arranged at intervals in the front-to-back direction. The anode assemblies include anode guide rods and anode carbon blocks connected to the lower ends of the anode guide rods through steel claws. The anode guide rods are electrically connected through anode busbars extending in the front-to-back direction. A plurality of column busbars arranged at intervals in the front-to-back direction are also arranged next to the cell body. The soft busbars at the upper ends of the column busbars are connected to the anode busbars. The current is provided to the anode busbars through the column busbars, and then transmitted to the anode guide rods. A lifting mechanism bracket is arranged on the upper side of the cell body, and a lifting mechanism for raising the height of the anode guide rods is arranged on the lifting mechanism bracket.

[0004] In recent years, electrolytic cells have gradually tended to be larger, and the cell conditions in electrolytic cell production have become more complicated. The development of large-scale electrolytic cells has led to increasingly greater differences in temperature, concentration and reaction rate in various parts of the electrolytic cell. At the same time, the shape of the cell furnace is irregular, and large amounts of precipitation are prone to occur locally, and current distribution is uneven. This makes it easy to break the material balance and energy balance of the entire cell, which in turn causes more voltage swings in the electrolytic cell.

[0005] The voltage swing of the electrolytic cell is a major thorny problem in electrolytic production. The common method of dealing with voltage swing is to increase the operating voltage of the electrolytic cell, that is, to increase the height of the anode guide rod through the lifting mechanism, thereby increasing the distance between the anode and the cathode, thereby achieving the operating voltage of the electrolytic cell. The problem with the prior art is that when the lifting mechanism is working, all the anode guide rods are synchronously lifted to the same height. However, it is found in production that due to the long overall length of the cell body, the voltage swings in each section of the cell body are inconsistent, that is, along the length direction of the cell body, the voltage swings in each section of the cell body are graded, that is, the required lifting heights of the anode guide rods corresponding to each section of the cell body are also inconsistent. The electrolytic cell in the prior art cannot meet the requirements of lifting the anode guide rods corresponding to different sections of the cell body to different heights. Utility Model Content

[0006] The utility model aims to provide an aluminum electrolytic cell adaptable to voltage swing grading, so as to solve the technical problem in the prior art that the lifting heights of the anode guide rods are consistent and cannot adapt to voltage swing grading.

[0007] In order to solve the above technical problems, a technical solution of an aluminum electrolytic cell adapted to voltage swing classification in the utility model is as follows:

[0008] An aluminum electrolytic cell adapted to voltage swing grading comprises a cell body extending in a front-to-back direction and a plurality of anode assemblies arranged at intervals in the front-to-back direction, the anode assemblies comprising anode guide rods and anode carbon blocks arranged at the bottom of the anode guide rods, each anode guide rod being electrically connected through an anode busbar extending in a front-to-back direction, the aluminum electrolytic cell further comprising a plurality of column busbars arranged at intervals in the front-to-back direction, the column busbars being connected to the anode busbars through column soft busbars, a lifting mechanism bracket being arranged on the upper side of the cell body, a lifting mechanism for lifting the height of the anode guide rods being arranged on the lifting mechanism bracket, the lifting mechanism comprising a plurality of first lifting brackets arranged at intervals in the front-to-back direction and capable of moving up and down, the first lifting brackets being driven by a first lifting power source, the lifting mechanism further comprising a plurality of second lifting brackets arranged at intervals in the front-to-back direction, each first lifting bracket corresponding to at least two second lifting brackets, each second lifting bracket being driven by a second lifting power source respectively arranged on the first lifting bracket, each second lifting bracket being connected to at least two anode guide rods, the anode busbar comprising a rigid busbar connected between each anode guide rod on the second lifting bracket, and the anode busbar further comprising a flexible busbar connected between the rigid busbars between adjacent second lifting brackets.

[0009] Furthermore, each rigid busbar corresponds to a column busbar.

[0010] Furthermore, a vertically arranged guide rod is fixed on the first lifting bracket, a guide hole cooperating with the guide rod for guiding movement in the up and down directions is arranged on the lifting mechanism bracket, and the first lifting power source includes a vertical driving cylinder arranged between the lifting mechanism bracket and the first lifting bracket.

[0011] Furthermore, the second lifting power source includes a driving motor arranged on the first lifting bracket. The first lifting bracket is also rotatably equipped with a driving nut whose rotating axis extends in the up and down directions. The driving motor is transmission-connected to the driving nut. The second lifting bracket is provided with a vertically arranged driving screw, and the driving nut is threadedly matched with the driving screw.

[0012] Furthermore, four anode guide rods are arranged on each second lifting bracket.

[0013] Furthermore, there are two trough bodies, which are a left trough body and a right trough body arranged on the left and right respectively. Each first lifting bracket corresponds to four second lifting brackets, two of which are second lifting brackets on the upper side of the left trough body, and the other two second lifting brackets are second lifting brackets on the upper side of the right trough body.

[0014] The beneficial effects of the utility model are as follows: in the utility model, when the height of the anode guide rod needs to be raised, the height of the first lifting bracket is raised by the first lifting power source, and the first lifting bracket can raise the height of at least two second lifting brackets connected thereto, thereby achieving a coarse adjustment of the height of the anode guide rod on the second lifting bracket, and then according to the grading of the voltage swing, each second lifting bracket can be driven individually by its corresponding second lifting power source to adjust the height, and the height of each second lifting bracket is adjusted individually to achieve fine adjustment of the corresponding anode guide rod height, so that the anode guide rods at different positions can be adjusted to different heights according to the grading of the voltage swing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an aluminum electrolytic cell adapted to voltage swing classification in the utility model;

[0017] Figure 2 is a schematic diagram of the coordination of the anode busbar, the column busbar and the anode guide rod in the top view of this embodiment;

[0018] Figure 3 is a schematic diagram of cooperation between the second lifting bracket and the anode guide rod in the top view of this embodiment;

[0019] Explanation of the accompanying drawings: 1. Left trough body; 2. Right trough body; 3. Anode carbon block; 4. Anode guide rod; 5. Anode busbar; 6. Column busbar; 7. Driving screw rod; 8. Second lifting bracket; 9. First lifting bracket; 10. Driving motor; 11. Motor gear; 12. Driving nut; 13. Lifting mechanism bracket; 14. Vertical driving cylinder; 15. Guide rod; 16. Rigid busbar; 17. Flexible busbar; 18. Lifting bracket guide rod. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] The implementation of a voltage swing graded aluminum electrolytic cell of the utility model is as follows: Figures 1 to 3 As shown:

[0023] The aluminum electrolytic cell in this embodiment is a double-cell structure, which includes two cell bodies, namely a left cell body 1 and a right cell body 2 arranged on the left and right. The left cell body 1 and the right cell body 2 adopt a left-right symmetrical structure. In this embodiment, only the structure of the right cell body is introduced in detail.

[0024] The length of the right trough body 2 extends along the front-to-back direction, and each trough body corresponds to a plurality of anode assemblies spaced apart along the front-to-back direction, and the anode assemblies include anode guide rods 4 and anode carbon blocks 3 disposed at the bottom of the anode guide rods. In this embodiment, the number of anode guide rods is a multiple of 4. Each anode guide rod is electrically connected through an anode busbar 5 whose length extends along the front-to-back direction. The aluminum electrolytic cell also includes a plurality of column busbars 6 spaced apart along the front-to-back direction. The column busbar corresponding to the right trough body is disposed on the right side of the right trough body, and the column busbar is connected to the anode busbar through a column soft busbar. A lifting mechanism bracket 13 is disposed on the upper side of the trough body, and a lifting mechanism for raising the height of the anode guide rod is disposed on the lifting mechanism bracket 13.

[0025] In this embodiment, every four anode guide rods form a group, and the lifting mechanism includes a plurality of first lifting brackets 9 that are spaced apart along the front-to-back direction and can move up and down. The first lifting brackets 9 are driven by a first lifting power source. A plurality of vertically arranged guide rods 15 are fixed on the first lifting bracket 9. Each guide rod is spaced apart along the front-to-back direction. The lifting mechanism bracket is provided with guide holes that cooperate with the guide rods to guide the movement in the up and down directions. The first lifting power source includes a vertical driving cylinder 14 that is arranged between the lifting mechanism bracket and the first lifting bracket, and the vertical driving cylinder is arranged on the left and right sides of the guide rod.

[0026] The number of the first lifting brackets is one eighth of the number of the guide rods in one trough body, and each first lifting bracket 9 corresponds to four second lifting brackets 8, of which two second lifting brackets are second lifting brackets on the upper side of the left trough body, and the other two second lifting brackets are second lifting brackets on the upper side of the right trough body. In other words, the lower end of each first lifting bracket is connected to four second lifting brackets, of which two second lifting brackets are second lifting brackets on the upper side of the left trough body, and the other two second lifting brackets are second lifting brackets on the upper side of the right trough body.

[0027] Each second lifting bracket is driven by a second lifting power source arranged on the first lifting bracket, and four anode guide rods 4 are connected to each second lifting bracket. The four anode guide rods on the same second lifting bracket form an anode guide rod group. The anode busbar includes a rigid busbar 16 connected between the anode guide rods of the same anode guide rod group. The anode busbar also includes a flexible busbar 16 connected between two adjacent anode guide rod groups in the front-to-back direction. The setting of the flexible busbar 16 allows the heights of the anode guide rods of two adjacent anode guide rod groups to be different.

[0028] Each anode guide rod group corresponds to a column busbar, that is, a column busbar is electrically connected to the rigid busbar on the same anode guide rod group. The second lifting power source includes a driving motor 10 arranged on the first lifting bracket, and the number of the driving motors 10 corresponds to the number of the second lifting brackets 8. The first lifting bracket is also rotatably equipped with a driving screw 12 whose rotation axis extends in the up-down direction. The motor shaft of the driving motor is provided with a motor gear 11, and the motor gear 11 is transmission-connected with the driving screw 12. The second lifting bracket is provided with a vertically arranged driving screw 7, and the driving screw 12 is threadedly matched with the driving screw 7. Two lifting bracket guide rods 18 are fixed on the front and rear sides of the driving screw on the second lifting bracket, and the first lifting bracket is provided with a guide rod guide hole that cooperates with the lifting bracket guide rod in guiding movement in the up-down direction.

[0029] When in use, a first lifting bracket can synchronously lift the height of four second lifting brackets, and each second lifting bracket is connected to four anode guide rods, that is to say, when the first lifting bracket is raised, the height of sixteen anode guide rods can be raised at a time, of which eight anode guide rods are corresponding to the left trough body, and the other eight anode guide rods are corresponding to the right trough body. When the electrolytic cell encounters voltage swing, firstly, the lifting height of two adjacent first lifting brackets in the front-to-back direction can be controlled separately to achieve a rough adjustment of the height of the anode guide rods, and secondly, each second lifting bracket is driven by its corresponding second lifting power source, and when the height of a second lifting bracket is adjusted, the height of the four anode guide rods can be adjusted synchronously, thereby achieving fine adjustment of the height of the anode guide rods at the corresponding position, thereby ensuring that the height of the anode guide rods corresponding to different length positions of the trough body can be adjusted separately to meet the voltage swing grading requirements of the electrolytic cell.

[0030] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0031] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0032] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An aluminum electrolytic cell adapted to voltage swing grading, comprising a cell body extending in a front-to-back direction and a plurality of anode assemblies spaced apart in the front-to-back direction, the anode assemblies comprising an anode guide rod and an anode carbon block disposed at the bottom of the anode guide rod, each anode guide rod being electrically connected via an anode busbar extending in a front-to-back direction, the aluminum electrolytic cell further comprising a plurality of column busbars spaced apart in the front-to-back direction, the column busbars being connected to the anode busbars via column soft busbars, a lifting mechanism bracket being disposed on the upper side of the cell body, a lifting mechanism for raising the height of the anode guide rod being disposed on the lifting mechanism bracket, characterized in that: The lifting mechanism includes a plurality of first lifting brackets that are spaced apart along the front-to-back direction and can move up and down, the first lifting brackets are driven by a first lifting power source, the lifting mechanism also includes a plurality of second lifting brackets that are spaced apart along the front-to-back direction, each first lifting bracket corresponds to at least two second lifting brackets, each second lifting bracket is driven by a second lifting power source arranged on the first lifting bracket, each second lifting bracket is connected to at least two of the anode guide rods, the anode busbar includes a rigid busbar connected between the anode guide rods on the second lifting brackets, and the anode busbar also includes a flexible busbar between the rigid busbars connected between adjacent second lifting brackets.

2. The aluminum electrolysis cell according to claim 1, characterized in that: Each rigid busbar corresponds to a column busbar.

3. The aluminum electrolysis cell according to claim 1, characterized in that: A vertically arranged guide rod is fixed on the first lifting bracket, a guide hole cooperating with the guide rod for guiding movement in the up and down directions is arranged on the lifting mechanism bracket, and the first lifting power source comprises a vertical driving cylinder arranged between the lifting mechanism bracket and the first lifting bracket.

4. The aluminum electrolysis cell according to claim 1, characterized in that: The second lifting power source includes a driving motor arranged on the first lifting bracket. The first lifting bracket is also rotatably equipped with a driving nut with a rotating axis extending in the up and down directions. The driving motor is transmission-connected to the driving nut. The second lifting bracket is provided with a vertically arranged driving screw, and the driving nut is threadedly matched with the driving screw.

5. The aluminum electrolysis cell according to claim 1, characterized in that: Four anode guide rods are arranged on each second lifting bracket.

6. The aluminum electrolysis cell according to any one of claims 1 to 5, characterized in that: There are two trough bodies, which are a left trough body and a right trough body arranged on the left and right. Each first lifting bracket corresponds to four second lifting brackets, two of which are second lifting brackets on the upper side of the left trough body, and the other two second lifting brackets are second lifting brackets on the upper side of the right trough body.

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