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Slot base aluminium electrolysis cell cathode structure

A technology of aluminum electrolytic cell and cathode structure, which is applied in the field of aluminum electrolytic cells, can solve the problems of limited space for improving current efficiency, loss of current efficiency, difficulty in achieving energy saving, etc., achieve shortened conductive path, improve power utilization rate, and improve cathode voltage. Reduce the effect of

Inactive Publication Date: 2010-07-21
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current efficiency of the existing electrolyzers is mostly between 90% and 96%, and the space for improving the current efficiency is limited.
At present, the pole distance of the aluminum electrolytic cell is generally about 4.5-5cm, and the voltage drop caused by the pole distance is about 40% of the total energy consumption. The reduction of the pole distance provides a lot of space for energy saving and consumption reduction. Due to the limitation of the structure and the reduction of the pole distance, due to the influence of the fluctuation of the aluminum liquid electrolyte interface caused by the magnetic field, the electrolytic cell will become unstable, lose current efficiency, and it is difficult to achieve the purpose of energy saving

Method used

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  • Slot base aluminium electrolysis cell cathode structure
  • Slot base aluminium electrolysis cell cathode structure
  • Slot base aluminium electrolysis cell cathode structure

Examples

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Effect test

Embodiment 1

[0041] Figure 1~2 As shown, the cathode structure of the aluminum electrolytic cell is composed of the tank shell, the side lining 1, the cathode carbon block 3, the fixing material 5 between the cathode carbon blocks, and the bottom lining 6. Cathode steel rods 2 are vertically installed at the bottom of cathode carbon block 3, and 2 to 6 cathode steel rods 2 are assembled into one through the bottom lining 6 and out from the bottom of the tank. Carbon paste, magnesia bricks, silicon carbide bricks and other fastening materials 5 are used for connection. The height of the fastening material 5 is 20-450mm lower than the cathode carbon block. The end of the carbon block and the side lining 1 are tamped with castables and surrounding paste. The distance between the cathode carbon blocks 3 is 30-300 mm.

[0042] The end of the cathode carbon block and the side liner 1 are tamped with castables and surrounding paste.

[0043] Cathode steel rods 2 are vertically installed at th...

Embodiment 2

[0045] Figure 3-4As shown, the cathode structure of the aluminum electrolytic cell is composed of a side lining 1, a cathode carbon block 3, a block 4, a fixing material 5 between the cathode carbon blocks, and a bottom lining 6. Cathode steel rods 2 are vertically installed at the bottom of the cathode carbon block, and 2 to 6 cathode steel rods 2 are assembled into one through the bottom liner 6 and come out from the bottom of the tank. The installation of the cathode carbon block 3 is the same as that of the electrolytic cell currently in production. The block 3 is connected by a fastening material 5, the upper surface of the cathode carbon block 3 is a plane, and a block 4 is placed on the upper surface of the cathode carbon block. The block can be placed along the vertical or horizontal direction of the electrolytic cell. Generally, the number of stoppers 4 placed on the surface is 1-100 pieces

[0046] The end of the cathode carbon block and the side liner 1 are tamped...

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Abstract

The invention discloses a slot base aluminium electrolysis cell cathode structure, belonging to the technical field of aluminium electrolysis cell. The aluminium electrolysis cell cathode structure comprises a housing and an inner lining. Cathode carbon blocks are connected by a fastening material, the distance among cathode carbon blocks is increased, the height of the fastening material is lower than the height of the cathode carbon blocks, or distance among cathode carbon blocks is not increased, baffle plates are arranged on the upper surface of the cathode carbon blocks, cathode steel bars are vertically arranged at the bottom of the cathode carbon blocks and penetrate through the bottom of the aluminium electrolysis cell. As cathode steel bars are vertically arranged at the bottom of the cathode carbon blocks and penetrate through the bottom of the aluminium electrolysis cell, horizontal current in aluminium liquid is basically removed, stability of the aluminium electrolysis cell is enhanced, cathode conductive path is shortened and cathode drop is lowered. In the invention, a large aluminum pool is divided into a plurality of small sections, so that flow and volatility due to the action of electromagnetic force are restricted, stability of the aluminium electrolysis cell is enhanced, liquid level and polar distance of the aluminum liquid are lowered, current efficiency is enhanced, senseless power consumption is greatly reduced and energy conservation effect is very noticeable.

Description

technical field [0001] The invention relates to a cathode structure of an aluminum electrolytic cell with electricity at the bottom of the cell, and belongs to the technical field of aluminum electrolytic cells. Background technique [0002] The Hall-Heroult electrolyser currently used for aluminum industry production uses carbon anodes and carbon block cathodes to produce aluminum by electrolysis of molten alumina. The electrolyte consists mainly of cryolite and alumina melt, in addition to aluminum fluoride dissolved in it. and other fluoride salts. The electrolytically separated aluminum is accumulated on the upper part of the cathode of the carbon block at the bottom of the tank, forming an aluminum liquid layer and serving as a part of the cathode. Since the molten aluminum in the electrolytic cell moves under the influence of the electromagnetic field in the workshop, it is necessary to maintain a certain height of the molten aluminum to reduce the fluctuation of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08
Inventor 杨晓东刘雅锋周东方朱佳明邹智勇孙康建胡红武
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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