Cathode assembly structure of aluminum electrolysis cell

Abstract

The utility model relates to the technical field of aluminum electrolysis equipment, in particular to a cathode assembly structure of an aluminum electrolysis cell, which comprises a cathode carbon block, a cathode steel bar I and a cathode steel bar II, a groove I and a groove II are formed in the lower end of the cathode carbon block along the length direction; the first groove and the second groove extend in the same direction and are communicated with each other. The cathode steel bar I is arranged in the groove I; a phosphorus pig iron pouring layer I is arranged between the cathode steel bar I and the groove I; the second cathode steel bar is arranged in the second groove; a phosphorus pig iron pouring layer II is arranged between the cathode steel bar II and the groove II; a preset distance is formed between the second cathode steel bar and the first cathode steel bar; a steel bar paste layer is filled between the cathode steel bar II and the cathode steel bar I; the overlapping area of the second cathode steel bar and the second groove is larger than the overlapping area of the first cathode steel bar and the first groove. The current distribution of the electrolytic bath can be optimized, the magnetic field balance is improved, and the production efficiency and the stability of the electrolytic bath are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminum electrolysis equipment technical field especially relates to a kind of aluminum electrolysis cell cathode assembly structure. BACKGROUND

[0002] In aluminum electrolysis cell, current successively passes through anode carbon block and molten electrolyte, aluminum liquid and cathode carbon block, and then flows out from the two sides of electrolysis cell after passing through cathode steel rod, and is collected into cathode busbar.Currently, aluminum electrolysis cell generally adopts large-face multi-point power input mode, but in actual production, the change of busbar temperature will affect the balance of power input side (A face) and power output side (B face) busbar, causing a large magnetic field in horizontal direction during the operation of existing electrolysis cell, and aluminum liquid flows from power input side (A face) to power output side (B face) under the action of electromagnetic force, resulting in imperfect formation of middle cell side of power output side; moreover, the overall current of cathode of power output side is high, the temperature of steel rod is high, and in serious cases, the power output proportion of cathode of power input side and power output side reaches 44%:56%, which destroys the symmetry of cell bottom and cell side; further, it leads to unstable operation of electrolysis cell, affecting production efficiency and aluminum product quality; in the prior art, the balance of current is realized by changing the structure of steel rod and adding different resistance materials in steel rods on both sides, which has high manufacturing cost and increases power consumption. SUMMARY

[0003] Therefore, the utility model provides a kind of aluminum electrolysis cell cathode assembly structure, main purpose is to optimize the current distribution of electrolysis cell, improve magnetic field balance, improve the production efficiency and stability of electrolysis cell, and simple structure, easy to manufacture, can be manufactured by existing equipment and process, low in cost.

[0004] To achieve the above-mentioned purpose, the utility model mainly provides the following technical scheme:

[0005] The utility model discloses an aluminum electrolysis cell cathode assembly structure, comprising: cathode carbon block, cathode steel rod one and cathode steel rod two.

[0006] The lower end of the cathode carbon block is provided with groove one and groove two along the length direction; the groove one is a rectangular groove structure; the groove two is a rectangular groove structure.

[0007] The extension directions of the groove one and the groove two are the same.

[0008] The groove one and the groove two are in communication with each other.

[0009] The width of the groove one is predetermined width one; the width of the groove two is predetermined width two.

[0010] The length of the groove one is predetermined length one; the length of the groove two is predetermined length two.

[0011] The cross section of the cathode steel bar one is rectangular; the cathode steel bar one is arranged in the groove one; three outer sides of the cathode steel bar one are arranged in correspondence with three inner sides of the groove one in parallel with each other;

[0012] The end of the cathode steel bar one extends out of the groove one; a phosphorus pig iron pouring layer one is arranged between the cathode steel bar one and the groove one;

[0013] The cross section of the cathode steel bar two is rectangular; the cathode steel bar two is arranged in the groove two; three outer sides of the cathode steel bar two are arranged in correspondence with three inner sides of the groove two in parallel with each other;

[0014] The end of the cathode steel bar two extends out of the groove two; a phosphorus pig iron pouring layer two is arranged between the cathode steel bar two and the groove two;

[0015] The cathode steel bar two is spaced apart from the cathode steel bar one by a predetermined distance; a steel bar paste layer is filled between the cathode steel bar two and the cathode steel bar one;

[0016] The overlapping area of the cathode steel bar two and the groove two is greater than the overlapping area of the cathode steel bar one and the groove one.

[0017] Further, the predetermined length two is greater than the predetermined length one;

[0018] The predetermined width two is equal to the predetermined width one.

[0019] Further, the predetermined length two is greater than the predetermined length one;

[0020] The predetermined width two is greater than the predetermined width one.

[0021] Further, the phosphorus pig iron pouring layer one is arranged between the three corresponding sides of the cathode steel bar one and the groove one;

[0022] The phosphorus pig iron pouring layer two is arranged between the three corresponding sides of the cathode steel bar two and the groove two;

[0023] The area of the phosphorus pig iron pouring layer two is greater than the area of the phosphorus pig iron pouring layer one.

[0024] By means of the above technical solution, the aluminum electrolysis cell cathode assembly structure has at least the following advantages:

[0025] The current distribution of the electrolysis cell is optimized, the magnetic field balance is improved, the production efficiency and stability of the electrolysis cell are improved, the structure is simple, the manufacturing is convenient, the existing equipment and process can be used for manufacturing, and the cost is low.

[0026] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, the following is a preferred embodiment of the present application and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A schematic view of the cathode assembly structure of the aluminum electrolysis cell provided by the embodiment of the present application.

[0028] As shown in the figure:

[0029] 1 is a cathode carbon block, 2 is a cathode steel rod two, 3 is a phosphorus pig iron pouring layer two, 4 is a steel rod paste layer, 5 is a cathode steel rod one, and 6 is a phosphorus pig iron pouring layer one. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purpose of the present application, the specific implementation, structure, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0031] As shown in the figure, Figure 1 An embodiment of the present application proposes a cathode assembly structure of an aluminum electrolysis cell, which comprises: a cathode carbon block 1, a cathode steel rod one 5 and a cathode steel rod two 2; the cathode carbon block 1 is a graphitized carbon block; the lower end of the cathode carbon block 1 is provided with a groove one and a groove two along the length direction; the groove one is a rectangular groove structure; the groove two is a rectangular groove structure; the extension directions of the groove one and the groove two are the same; the groove one and the groove two are in communication with each other; the width of the groove one is a predetermined width one; the width of the groove two is a predetermined width two; the length of the groove one is a predetermined length one; the length of the groove two is a predetermined length two; the length and width of the groove one and the groove two can be set according to the specific size and operating parameters of the electrolysis cell.

[0032] The cross section of the cathode steel rod one 5 is rectangular; the cathode steel rod one 5 is arranged in the groove one; the three outer sides of the cathode steel rod one 5 are arranged in parallel correspondence with the three inner sides of the groove one; the end of the cathode steel rod one 5 extends out of the groove one; the phosphorus pig iron pouring layer one 6 is arranged between the cathode steel rod one 5 and the groove one; the cross section of the cathode steel rod two 2 is rectangular; the cathode steel rod two 2 is arranged in the groove two; the three outer sides of the cathode steel rod two 2 are arranged in parallel correspondence with the three inner sides of the groove two; the end of the cathode steel rod two 2 extends out of the groove two; the phosphorus pig iron pouring layer two 3 is arranged between the cathode steel rod two 2 and the groove two; the cathode steel rod two 2 and the cathode steel rod one 5 are spaced apart by a predetermined distance; the predetermined distance can be 50-150mm.

[0033] A steel rod paste layer 4 is filled between cathode steel rod 2 and cathode steel rod 5; the overlap area between cathode steel rod 2 and trench 2 is greater than the overlap area between cathode steel rod 5 and trench 1, so that the current on the cathode steel rod 2 side is greater than the current on the cathode steel rod 5 side.

[0034] One embodiment of this utility model proposes a cathode assembly structure for an aluminum electrolytic cell. Through an asymmetrical assembly structure, the current distribution on the inlet and outlet sides is adjusted, making the output ratio on the inlet and outlet sides tend to be balanced (the output ratio on the inlet and outlet sides tends to be 50:50). This reduces current concentration, lowers the temperature of the steel bar, optimizes the magnetic field distribution, reduces the non-uniformity of aluminum liquid flow, and improves the symmetry of the furnace sides. It improves the production efficiency and stability of the electrolytic cell, extends the service life of the electrolytic cell, and has a simple structure. It is easy to manufacture and can be manufactured on existing equipment without additional processes, resulting in low manufacturing costs.

[0035] As a preferred embodiment of the above, the predetermined length 2 is greater than the predetermined length 1; the predetermined width 2 is equal to the predetermined width 1, so that the overlapping area of ​​the cathode steel rod 2 and the trench 2 is greater than the overlapping area of ​​the cathode steel rod 5 and the trench 1, so that the current on the cathode steel rod 2 side is greater than the current on the cathode steel rod 5 side.

[0036] As a preferred embodiment of the above, the predetermined length 2 is greater than the predetermined length 1; the predetermined width 2 is greater than the predetermined width 1, so that the overlapping area of ​​the cathode steel rod 2 and the trench 2 is greater than the overlapping area of ​​the cathode steel rod 5 and the trench 1, so that the current on the cathode steel rod 2 side is greater than the current on the cathode steel rod 5 side.

[0037] As a preferred embodiment, a phosphorus iron casting layer 6 is provided between the three sides of the cathode steel rod 5 corresponding to the trench 1; a phosphorus iron casting layer 3 is provided between the three sides of the cathode steel rod 2 corresponding to the trench 2; the area of ​​the phosphorus iron casting layer 3 is larger than the area of ​​the phosphorus iron casting layer 6, so that the current on the cathode steel rod 2 side is greater than the current on the cathode steel rod 5 side.

[0038] To further clarify, while the terms "first," "second," etc., may be used herein to describe various elements, these terms should not limit the elements. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element; these terms are used only to distinguish one element from another. This does not depart from the scope of the exemplary embodiments. Similarly, "element one," "element two," and so on do not represent the order of elements; these terms are used only to distinguish one element from another. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0040] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A cathode assembly structure for an aluminum electrolytic cell, characterized in that, Includes: cathode carbon block, cathode steel rod one, and cathode steel rod two; The lower end of the cathode carbon block is provided with a first groove and a second groove along its length; the first groove is a rectangular groove structure; the second groove is a rectangular groove structure. The first trench and the second trench extend in the same direction; The first trench and the second trench are interconnected; The width of the first trench is a predetermined width one; the width of the second trench is a predetermined width two; The length of the first trench is a predetermined length one; the length of the second trench is a predetermined length two; The cathode steel rod has a rectangular cross-section; the cathode steel rod is disposed in the trench; the three outer sides of the cathode steel rod are parallel to and correspond to the three inner sides of the trench. The end of the cathode steel rod extends out of the groove; a phosphorus pig iron casting layer is provided between the cathode steel rod and the groove. The cathode steel rod 2 has a rectangular cross-section; the cathode steel rod 2 is disposed within the trench 2; the three outer sides of the cathode steel rod 2 are arranged parallel to and corresponding to the three inner sides of the trench 2. The end of the second cathode steel rod extends out of the second groove; a second layer of phosphorus pig iron is provided between the second cathode steel rod and the second groove; The cathode steel rod two is spaced apart from the cathode steel rod one by a predetermined distance; a steel rod paste layer is filled between the cathode steel rod two and the cathode steel rod one; The overlap area between the second cathode steel rod and the second trench is greater than the overlap area between the first cathode steel rod and the first trench.

2. The aluminum electrolytic cell cathode assembly structure according to claim 1, characterized in that, The second predetermined length is greater than the first predetermined length. The predetermined width 2 is equal to the predetermined width 1.

3. The aluminum electrolytic cell cathode assembly structure according to claim 1, characterized in that, The second predetermined length is greater than the first predetermined length. The predetermined width 2 is greater than the predetermined width 1.

4. The aluminum electrolytic cell cathode assembly structure according to claim 1, characterized in that, A phosphorus pig iron casting layer is provided between the three sides of the cathode steel rod and the groove. A second layer of phosphorus pig iron is provided between the three sides of the cathode steel rod and the groove. The area of ​​the second layer of pig iron phosphate casting is larger than the area of ​​the first layer of pig iron phosphate casting.

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