Outer thermal insulation structure of cathode area of aluminum electrolysis cell

Abstract

The utility model relates to the technical field of electrolytic aluminum production, in particular to an external thermal insulation structure of a cathode area of an aluminum electrolysis cell, and aims to solve the problems of poor thermal balance and low stability of the electrolysis cell caused by large heat dissipation of the side lower part of the cathode area of a graphitized cathode electrolysis cell and obvious lengthening of extension legs of part of the electrolysis cell in the prior art. And finally, the overall heat efficiency, energy conservation and consumption reduction of the electrolytic bath are greatly influenced. The heat preservation structure is mainly composed of an electrolytic cell cathode area, a cathode steel bar, a clamping groove, a nanometer aerogel heat insulation felt, a fixing ribbon and the like, and the nanometer aerogel heat insulation felt heat preservation material is cut according to the sizes of the cathode steel bar area on the side portion and the inclined plane area on the lower side portion of the electrolytic cell; and the thermal insulation material is fixed on the side part and the inclined surface of the cathode area of the electrolytic cell by using a ribbon, so that the heat dissipation of the cathode area at the lower side part of the electrolytic cell is effectively reduced, the heat balance of the electrolytic cell is improved, and powerful support and guarantee are provided for efficient and stable operation and good index acquisition of the electrolytic cell.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic aluminum production, in particular to an external thermal insulation structure of a cathode area of ​​an aluminum electrolytic cell. Background Art

[0002] In the aluminum electrolytic cells currently used, especially in large electrolytic cells, graphitized cathode carbon blocks and full-graphite cathode carbon blocks have been widely used and have achieved good results. Compared with the high-graphite series cathode carbon blocks, graphitized cathode carbon blocks have better overall uniformity and very good thermal conductivity, which effectively solves the problem of difficult adjustment of thermal balance in large aluminum electrolytic cells. Good electrical conductivity can greatly reduce the pressure drop at the bottom of the electrolytic cell. The overhaul of the electrolytic cell generally adopts graphitized cathode and phosphorus pig iron casting technology, and the electrolytic cell runs smoothly. , furnace bottom pressure drop, average voltage advantages are obvious, the comprehensive power consumption of aluminum liquid is much lower than the tiered electricity price, but during the operation, it was found that the heat dissipation of the lower side of the cathode area of ​​the graphitized cathode electrolytic cell was too large, and the legs of some electrolytic cells became significantly longer, affecting the stability of the electrolytic cell. In order to effectively solve the problem of large side heat dissipation, improve the thermal balance of the electrolytic cell, form a regular furnace chamber for the electrolytic cell, and improve its stability, it is urgently needed to further optimize the structure of the device for heat preservation and energy saving outside the cathode area of ​​the aluminum electrolytic cell, so as to achieve sustainable energy saving and consumption reduction of the online electrolytic cell and continuous improvement of production efficiency. Utility Model Content

[0003] The utility model provides an external heat preservation structure of the cathode region of an aluminum electrolytic cell to solve the problems existing in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A heat preservation structure outside the cathode area of ​​an aluminum electrolytic cell comprises a first cathode steel rod and a second cathode steel rod symmetrically arranged inside the cathode area of ​​the electrolytic cell, the outer sides of the first cathode steel rod and the second cathode steel rod are both covered with nano-aerosolized thermal insulation felt, and a fixing tie is fixed to the outer side of the nano-aerosolized thermal insulation felt.

[0006] Furthermore, a first slot is provided inside the cathode region of the electrolytic cell, and the nano-aerosolized thermal insulation felt is disposed in the first slot.

[0007] Furthermore, a plurality of second slots are provided on the side of the nano-aerosolized thermal insulation felt, and the first cathode steel rod and the second cathode steel rod are both matched and mounted in the second slots.

[0008] Furthermore, a third slot is provided on a side of the nano-aerosolized thermal insulation felt away from the second slot, and the fixing tie is disposed in the third slot.

[0009] The utility model has the following beneficial effects:

[0010] The utility model provides an external thermal insulation structure of the cathode area of ​​an aluminum electrolytic cell, which is mainly composed of the cathode area of ​​the electrolytic cell, a cathode steel bar, a slot, nano-aerocondensation insulation felt and fixing tie bands and other components. The nano-aerocondensation insulation felt insulation material is cut according to the size of the cathode steel bar area on the side of the electrolytic cell and the lower side inclined surface area, and then the insulation material is fixed to the side and inclined surface of the cathode area of ​​the electrolytic cell with a tie band, which effectively reduces the heat dissipation of the cathode area on the lower side of the electrolytic cell, improves the thermal balance of the electrolytic cell, and provides strong support and guarantee for the efficient and stable operation of the electrolytic cell and obtaining good indicators. At the same time, it enables the online electrolytic cell to achieve the purpose of improving economic benefits and sustainable energy conservation and consumption reduction, and solves the problem that the heat dissipation on the lower side of the cathode area of ​​the graphitized cathode electrolytic cell is relatively large, and the legs of some electrolytic cells are significantly lengthened, resulting in poor thermal balance and reduced stability of the electrolytic cell, which ultimately has a great impact on the overall thermal efficiency and energy conservation and consumption reduction of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] The meanings of the reference numerals are as follows:

[0013] 1. Cathode area of ​​electrolytic cell; 2. First cathode steel rod; 3. Second cathode steel rod; 4. First slot; 5. Nano-aerosol insulation felt; 6. Second slot; 7. Third slot; 8. Fixing tie. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] like Figure 1 As shown, an external insulation structure of the cathode area of ​​an aluminum electrolytic cell includes a first cathode steel rod 2 and a second cathode steel rod 3 symmetrically installed on the inner side of the cathode area 1 of the electrolytic cell, the outer sides of the first cathode steel rod 2 and the second cathode steel rod 3 are covered with nano-aerosolized thermal insulation felt 5, and the outer sides of the nano-aerosolized thermal insulation felt 5 are installed with fixing tie ties 8.

[0016] A first slot 4 is provided inside the cathode region 1 of the electrolytic cell, and the nano-aerosolized thermal insulation felt 5 is mounted in the first slot 4 .

[0017] A group of second slots 6 are provided on the side of the nano-aerosolized thermal insulation felt 5 , and the first cathode steel rod 2 and the second cathode steel rod 3 are both matched and mounted in the second slots 6 .

[0018] A third slot 7 is further provided on a side of the nano-aerosolized thermal insulation felt 5 away from the second slot 6 , and the fixing tie 8 is mounted in the third slot 7 .

[0019] During specific application of the utility model, when the online production of electrolytic cells has production problems such as large heat dissipation in the lower cathode area on the side, irregular formation of the electrolytic cell furnace, and obvious lengthening of the electrolytic cell legs, which affect the stability of the electrolytic cell due to factors such as defects in the lining design, the nano-aerosolized insulation felt 5 insulation material is cut according to the size of the first cathode steel bar 2 and the second cathode steel bar 3 area on the side of the electrolytic cell and the lower side inclined surface area, and then the nano-aerosolized insulation felt 5 insulation material is fixed to the side and inclined surface of the cathode area of ​​the electrolytic cell using a fixing tie 8, thereby completing the aluminum electrolytic During the installation of the outer insulation at the lower side of the cell, a gap is left between the insulation material and the cell body, and the gap and the opening at both ends can be adjusted as needed to adjust the degree of insulation. While adding the outer insulation material at the lower side of the cathode area 1 of the electrolytic cell, the daily maintenance of the electrolytic cell is carried out, and the cell voltage is reduced according to the operating conditions, so that the heat dissipation of the cathode area 1 of the electrolytic cell is greatly reduced, which effectively improves the thermal balance of the electrolytic cell, and provides support and guarantee for the efficient and stable operation of the electrolytic cell and obtaining good indicators. Therefore, the insulation structure has good practicality.

Claims

1. An external insulation structure of the cathode region of an aluminum electrolytic cell, characterized by: The invention comprises a first cathode steel bar (2) and a second cathode steel bar (3) which are symmetrically arranged on the inner side of the cathode area (1) of the electrolytic cell; the outer sides of the first cathode steel bar (2) and the second cathode steel bar (3) are both covered with nano-gas condensation insulation felt (5); and the outer sides of the nano-gas condensation insulation felt (5) are fixedly provided with a fixing tie (8).

2. The external insulation structure of the cathode region of an aluminum electrolytic cell according to claim 1 is characterized in that: A first slot (4) is provided inside the cathode region (1) of the electrolytic cell, and the nano gas-condensed thermal insulation felt (5) is clamped in the first slot (4).

3. The external insulation structure of the cathode region of an aluminum electrolytic cell according to claim 2 is characterized in that: A plurality of second slots (6) are provided on the side of the nano-aerosol thermal insulation felt (5), and the first cathode steel rod (2) and the second cathode steel rod (3) are both matched and mounted in the second slots (6).

4. The external insulation structure of the cathode region of an aluminum electrolytic cell according to claim 3 is characterized by: A third slot (7) is also provided on a side of the nano-aerosolized thermal insulation felt (5) away from the second slot (6), and the fixing tie (8) is clamped in the third slot (7).

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