A cathode busbar configuration method for a super-large aluminum electrolytic cell

A cathode busbar and aluminum electrolytic cell technology, which is applied in the field of cathode busbar configuration, can solve the problems of electrolytic cell stability reduction, damage to current efficiency, and local magnetic field of electrolytic cell is too large, so as to achieve stable operation, improve current efficiency, and busbar The effect of flexible configuration methods

Active Publication Date: 2018-03-09
CENT SOUTH UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

One of the reasons is that for super-large aluminum electrolytic cells, since the length direction increases significantly, if the busbar direction and distribution ratio of medium and large electrolytic cells continue to be used, the local magnetic field of the electrolytic cell will be too large, resulting in the electrolytic cell Decreased stability, electrolyser voltage runs at high levels and impairs current efficiency

Method used

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  • A cathode busbar configuration method for a super-large aluminum electrolytic cell
  • A cathode busbar configuration method for a super-large aluminum electrolytic cell
  • A cathode busbar configuration method for a super-large aluminum electrolytic cell

Examples

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Embodiment 1

[0032] This example takes a 540kA pre-baked aluminum electrolytic cell as the object, and there are 30 cathode carbon blocks in total. This electrolytic series will not adopt the external compensation bus scheme, and mainly consists of the cathode soft bus 1, the large surface bus 2 on the power inlet side, and the smoke in this tank. Compensation busbar 3 at the road end, busbar 4 at the aluminum end of the tank, compensation busbar 5 at the bottom of the tank, column busbar and tank body 7. The distribution of the bus current is carried out based on the cathode bus configuration method of the ultra-large aluminum electrolytic cell of the present invention. For the current on the A side, according to the current rating criteria, the current distribution of the flue end is 99kA (11 groups of cathodes), the distribution of the aluminum outlet is 81kA (9 groups of cathodes), and the distribution of the bus at the bottom of the tank is 90kA (10 groups of cathodes), and The bus ba...

Embodiment 2

[0038] This embodiment also takes a 540kA prebaked aluminum electrolytic cell as an example, with a total of 30 cathode carbon blocks. The difference is that this embodiment uses an external compensation bus. It is mainly composed of cathode soft busbar 1, large surface busbar on the power inlet side 2, compensation busbar at the flue end of the tank 3, aluminum outlet busbar 4 of the tank, compensation busbar 5 at the bottom of the tank, column busbar, external compensation busbar 8 and tank body 7. And the external compensation busbar 8 is 1 / 3 of the current of the slot series, namely 180kA, of which 100kA flows through the aluminum outlet end and 80kA flows through the flue end. The distribution method of the cathode busbar of the ultra-large aluminum electrolytic cell of the present invention is used to distribute the busbar current. In this example, in addition to the current of the cell, the magnitude of the terminal current also needs to consider the magnitude of the ext...

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Abstract

The invention discloses a cathode bus-bar configuration method of an ultra-large aluminum electrolytic cell. The total quantity of end compensating current is rated and cell bottom bus-bars adopt alternate compensation for offset, that is, the total current quantity flowing through a flue end is controlled within 100-150 kA, the current quantity of an aluminum discharge end is controlled within 80-120 kA, and the rest current on the A side bypasses the multiple cell bottom bus-bars. The routing manner of cathode bus-bars is designed accordingly, and specific parameters of cathode bus-bars of the electrolytic cell, independent compensation bus-bars, cell spacing and plant spacing are determined according to the calculated result of a magnetic fluid model. With the adoption of the cathode bus-bar configuration method of the ultra-large aluminum electrolytic cell, basic configuration of the bus-bars of the ultra-large aluminum electrolytic cell can be determined quickly, the vertical magnetic field and the horizontal magnetic field of melt can be effectively reduced, uniform distribution of the magnetic fields in the long axis direction of the cell is realized, stable operation of the aluminum electrolytic cell is realized, and the current efficiency of the electrolytic cell is improved.

Description

technical field [0001] The invention relates to a cathode busbar configuration method, in particular to a cathode busbar configuration method for an ultra-large aluminum electrolytic cell. Background technique [0002] In an aluminum electrolysis series, the rectified direct current is directly introduced to the electrolytic cell through the aluminum bus bar, and the tanks are connected in series through the aluminum bus bar. These are connected in series to form a series of slots. The bus bar in the electrolytic cell mainly undertakes the function of transporting the current from the cathode bar of the upstream electrolytic cell to the anode bar of the downstream electrolytic cell, and the different configurations of the bus bar greatly affect the physical field distribution of the electrolytic cell, restricting the oxidation loss of aluminum and The index of current efficiency is high or low. Moreover, the cost of the aluminum busbar system is also quite expensive, accou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/16
CPCC25C3/16
Inventor 张红亮李劼梁金鼎李天爽冉岭肖劲张凯
Owner CENT SOUTH UNIV
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