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Method for reducing anode gross dissipation of prebaked aluminum electrolysis cell

An aluminum electrolytic cell and anode technology, which is applied in the field of pre-baked aluminum electrolytic cells, can solve the problems of increasing anode gross consumption and ineffective utilization of carbon block residues, and achieves the advantages of reducing anode gross consumption, reducing energy consumption and improving current efficiency. Effect

Active Publication Date: 2020-11-17
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the existing technical conditions and management system for changing poles, some residual poles with large carbon blocks cannot be effectively used, which increases the gross consumption of anodes
[0004] Therefore, in order to reduce the current situation of large waste of materials caused by unbalanced anode consumption, properly prolong the service time of anodes with thicker anode carbon blocks, improve the balance of anode consumption, and reduce the gross consumption of anodes, it is urgent to develop a method that reduces the amount of prebaked aluminum The method of electrolytic cell anode hair loss

Method used

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  • Method for reducing anode gross dissipation of prebaked aluminum electrolysis cell
  • Method for reducing anode gross dissipation of prebaked aluminum electrolysis cell
  • Method for reducing anode gross dissipation of prebaked aluminum electrolysis cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] S1. A 200kA electrolytic cell uses an anode replacement system to perform anode replacement and anode data testing for one cycle, in which the total number of anode carbon blocks is 28, and the first height h of each anode is measured 1 ; After the butt electrode of the prebaked aluminum electrolytic cell was replaced with the 28 anodes and used for m days, the consumption height Δh of each anode in one cycle of each anode was measured, as shown in Table 1.

[0058] Table 1 - Each Anode A i Consumption height Δh of carbon block in one cycle

[0059]

[0060]

[0061] The minimum value of consumption height h in one cycle min For the A1 anode is 470.12cm, the maximum consumption height h in one cycle max The A7 anode is 514.82cm.

[0062] A covering material is obtained, the particle size composition of the covering material is 35±1% by mass fraction with a particle diameter less than 0.25mm, and the maximum particle diameter is 15mm. According to the consumpti...

Embodiment 2

[0087] S1. A 300kA electrolytic cell uses an anode replacement system to perform anode replacement and anode data testing for 3 cycles, in which the total number of anode carbon blocks is 40, and the first height h of each anode is measured 1 ; After the butt of the prebaked aluminum electrolytic cell was replaced with the 40 anodes and used for m days, the consumption height Δh of each anode in one cycle of each anode was measured, as shown in Table 7.

[0088] Table 7 - Each Anode A i Consumption height Δh of carbon block in one cycle

[0089]

[0090] The minimum average value of consumption height in a cycle is h min For the A20 anode is 426.46cm, the average consumption height within a cycle is the largest h max The A30 anode is 477.85cm.

[0091] A covering material is obtained, the particle size composition of the covering material is 33±2% by mass fraction with a particle diameter less than 0.25mm, and the maximum particle diameter is 12mm. According to the consum...

Embodiment 3

[0116] S1. A 400kA electrolytic cell uses an anode replacement system to perform anode replacement and anode data testing for 3 cycles, in which the total number of anode carbon blocks is 48, and the first height h of each anode is measured 1 ; After the butt of the prebaked aluminum electrolytic cell was replaced with the 48 anodes and used for m days, the consumption height Δh of each anode in one cycle of each anode was measured, as shown in Table 13.

[0117] Table 13 - Each Anode A i Consumption height Δh of carbon block in one cycle

[0118] Anode serial number A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 Height / cm 417.62 453.79 438.37 461.84 440.75 450.59 453.12 448.03 449.66 439.68 454.23 467.26 Anode serial number A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 Height / cm 461.9 443.89 455.91 444.52 442.42 443.85 449.54 448.6 447.27 436.78 447.52 423.69 Anode serial number A25 A26 A27 A28 A29 ...

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Abstract

The invention discloses a method for reducing the anode gross dissipation of a prebaked aluminum electrolysis cell. The method comprises the following steps: preparing a plurality of anodes, and measuring the first height H1 of each anode; replacing the anode scrap of the prebaked aluminum electrolysis cell with the plurality of anodes, after using the anodes for n days, measuring the consumptionheight delta H of each anode, and obtaining the second height H2 of each anode according to the first height H1 and the consumption height delta H; obtaining the minimum value H2min of the second height; obtaining the daily average consumption height of each anode (refer to the Specification), and adjusting the service time of each anode according to the second height H2, the second height minimumvalue H2min and the daily average consumption height (refer to the Specification) of each anode; if (refer to the Specification), not prolonging the service time of each anode; if(refer to the Specification), prolonging the service life of each anode, and the prolonged service life is N * 8h, and (refer to the Specification).

Description

technical field [0001] The invention relates to the technical field of prebaked aluminum electrolytic cells, in particular to a method for reducing anode gross consumption of prebaked aluminum electrolytic cells. Background technique [0002] The anode is an important part of the prebaked aluminum electrolytic cell. During the aluminum electrolysis process, the anode introduces direct current into the electrolytic cell and participates in the electrochemical reaction during the aluminum electrolysis process. During the reaction, a part of the carbon reacts with the oxygen generated by the electrochemical reaction. The other part of the carbon is consumed due to the reaction with oxygen in the air, or due to slag falling, deblocking and other reasons, and finally a part remains, which is the residual electrode. The anode used in the pre-baked electrolytic cell is formed in the anode factory according to the specified size, roasted, and assembled with the anode guide rod, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12C25C3/20
CPCC25C3/125C25C3/20
Inventor 邱仕麟李昌林王俊青周云峰方斌侯光辉汪艳芳包生重王俊伟
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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