Cathode conductive structure

A technology of cathode conduction and conductive rods, 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, and instability of electrolytic cells, etc., and achieves shortened conductive path, elimination of horizontal current, and reduced cathode voltage drop Effect

Inactive Publication Date: 2010-09-22
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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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 horizontal current and 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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Embodiment 1

[0028] like figure 1 As shown, the cathode conductive structure of the present invention is composed of a side lining 1 , a cathode carbon block 7 , a paste 5 between the cathode carbon blocks, and a bottom lining 6 . Conductive screws 2 are installed vertically at the bottom of the cathode carbon block, and the number of conductive screws 2 installed at the bottom of each group of cathode carbon blocks 7 is 1-2000. Every 1 to 500 conductive screws 2 are connected to a conductive rod 4 through a conductive plate 3, and the conductive rod 4 passes through the bottom lining 6 to pass through the bottom of the groove, and the conductive rod 4 can also pass through the side of the groove, such as figure 1 Only the case of piercing from the bottom is shown, but the scope of protection is not limited by the legend. The present invention is applicable to cathode carbon blocks 7 of various cross-sectional shapes, and the end of the cathode carbon block 7 and the side lining 1 are tam...

Embodiment 2

[0030] like figure 2 As shown, the cathode conductive structure of the aluminum electrolytic cell is composed of a side lining 1, a cathode carbon block 7, a paste between the cathode carbon blocks 5, and a bottom lining 6. Conductive screws 2 are vertically installed at the bottom of the cathode carbon block, and the number of conductive screws 2 installed at the bottom of each group of cathode carbon blocks 7 is 1 to 4000, and 2 to 1000 conductive screws 2 are connected to a conductive rod 4 through a conductive plate 3, The conductive rod 4 passes through the bottom lining 6 and passes through the bottom of the groove, and the conductive rod 4 can also pass through the side of the groove. figure 2 Only the case of piercing from the bottom is shown, but the scope of protection is not limited by the legend. The present invention is applicable to cathode carbon blocks 7 of various cross-sectional shapes, and the cross-sectional shapes of the cathode carbon blocks 7 may be s...

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Abstract

The invention discloses a cathode conductive structure of an aluminum cell and belongs to the technical field of aluminum cells. The cathode conductive structure of the invention comprises a lateral lining (1), a cathode carbon block (7), a cathode carbon block fastening material (5) and a bottom lining (6), and is characterized in that: the bottom part of the cathode carbon block (7) is provided with a conductive screw (2) which is connected with a conductive bar (4) by a conductive plate (3); and the conductive bar (4) passes through the bottom lining (6) to extend out of the cell. A cathode with the structure of the invention has the advantages of basically eliminating a horizontal current in molten aluminum, reducing the conductive path of the cathode, improving the stability of the electrolyte cell, realizing production with a lower electrode distance and reducing the pressure drop of the cathode. Therefore, the aluminum cells adopting the cathode conductive structure of the invention have extremely obvious energy-saving effect.

Description

technical field [0001] The invention relates to a cathode conductive structure of an aluminum electrolytic cell, belonging to the technical field of aluminum electrolytic cells. Background technique [0002] The Hall-Heroult electrolyzer currently used in the production of the aluminum industry uses carbon anodes and cathodes to produce aluminum by electrolysis of molten alumina. The electrolyte is mainly composed of cryolite and alumina melt, in addition to aluminum fluoride and other dissolved in it. 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 contact interface with the electro...

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胡红武孙康建
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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