A conductive cathode structure on the side of an aluminum electrolytic cell for reducing the horizontal current of aluminum liquid

A horizontal current, aluminum electrolytic cell technology, applied in the field of aluminum electrolytic cells, can solve the problems of cell life safety and hidden dangers of cell life, unsatisfactory effect, stress and conductivity changes, etc., to reduce cell voltage and facilitate low pole distance production , The effect of electric field optimization

Inactive Publication Date: 2015-10-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the structure for reducing the horizontal current of molten aluminum is basically the improvement of the structure of the cathode steel rod itself or the tamping paste. For example, Chinese patent 200710158715. The design and construction of the lining structure of the tank put forward higher requirements, and the current industrial experiment results are not ideal; Chinese patent 200610200265.1 and Chinese patent 201110089796.9 both proposed to reduce the horizontal current by changing the structure of the cathode steel rod, but the change of the steel rod structure will It leads to changes in the stress and electrical conductivity between the steel rod and the carbon block, which brings certain safety and hidden dangers to the life of the tank

Method used

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  • A conductive cathode structure on the side of an aluminum electrolytic cell for reducing the horizontal current of aluminum liquid
  • A conductive cathode structure on the side of an aluminum electrolytic cell for reducing the horizontal current of aluminum liquid
  • A conductive cathode structure on the side of an aluminum electrolytic cell for reducing the horizontal current of aluminum liquid

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Experimental program
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Effect test

Embodiment 1

[0037] like figure 2 , image 3 and Figure 4Shown is the schematic diagram of the semi-cathode structure of the aluminum electrolytic cell using the long and horizontally arranged side cathode steel rods of the present invention, which is composed of a cathode carbon block 1, a bottom cathode steel rod 2, a side cathode steel rod 3 and a steel rod carbon block. The paste consists of 4. In this embodiment, the total length of the cathode carbon block 1 is 3000-4000 mm, the width is 400-800 mm, and the height is 400-700 mm; the cathode carbon block 1 has two parallel dovetail grooves of equal cross-section at the bottom, and a corresponding dovetail groove is embedded in each dovetail groove. The bottom cathode steel rod 2 with full length or non-universal length of equal cross-section, the bottom cathode steel rod 2 is 50mm-90mm wide and 50mm-200mm high, and its material, processing and installation methods are the same as those of traditional cathode steel rods; cathode ca...

Embodiment 2

[0040] like Figure 5 , Image 6 and Figure 7 Shown is a cross-sectional view of the semi-cathode structure of an aluminum electrolytic cell using a long and inclined side cathode steel rod of the present invention, consisting of a cathode carbon block 1, a bottom cathode steel rod 2, a side cathode steel rod 3 and a steel rod carbon The paste consists of 4. In this embodiment, the total length of the cathode carbon block 1 is 3000mm-4000mm, the width is 400mm-800mm, and the height is 400mm-700mm; two dovetail grooves of equal cross-section are opened at the bottom of the cathode, and a dovetail groove of equal cross-section is embedded in each of the dovetail grooves. The bottom cathode steel rod 2 of full length or non-full length, the bottom cathode steel rod 2 is 50mm~90mm wide and 50mm~200mm high, and its material, processing and installation method are the same as those of the traditional cathode steel rod; the two sides of the cathode carbon block 1 There is an incl...

Embodiment 3

[0042] like Figure 8 , Figure 9 and Figure 10 Shown is a three-dimensional schematic diagram and a cross-sectional view of the semi-cathode structure of an aluminum electrolytic cell using a single steel bar at the bottom, a long side portion and horizontally arranged side cathode steel bars of equal cross-section according to the present invention. The side cathode steel rod 3 and the steel rod carbon paste 4 are composed. In this embodiment, the total length of the cathode carbon block 1 is 3000mm to 4000mm, the width is 400mm to 800mm, and the height is 400mm to 700mm; the bottom of the cathode carbon block 1 has a dovetail groove of equal section, and a dovetail groove of equal section is embedded in the dovetail groove. The bottom cathode steel rod 2 of full length or non-full length, the bottom cathode steel rod 2 is 50mm~90mm wide and 50mm~200mm high, and its material, processing and installation method are the same as those of the traditional cathode steel rod; th...

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Abstract

The invention discloses an aluminum cell side conductive cathode structure for reducing a horizontal current of molten aluminum. The horizontal current in the molten aluminum can be greatly reduced through installing and using a horizontal or inclined conductive side cathode steel rod. A structure parameter of a cathode is determined according to an actual cell type design, the horizontal current in the molten aluminum can be remarkably reduced when the cathode is applied to the aluminum cell, the distribution of the horizontal current in the molten aluminum is optimized and the cathode voltage drop is reduced, thus the functions of weakening the vertical fluctuation of the molten aluminum and stabilizing the horizontal movement of the molten aluminum are achieved so that an electrolysis can be stably carried out at a low voltage, and the energy consumption is greatly reduced. The aluminum cell side conductive cathode structure is convenient and simple to process, easy to realize, low in cost and little in influence on service life of an inner linear of the cell.

Description

technical field [0001] The invention relates to an aluminum electrolytic cell, in particular to a conductive cathode structure at the side of the aluminum electrolytic cell for reducing the horizontal current of the aluminum liquid. Background technique [0002] The Hall-Héroult aluminum electrolysis process has been the only economically viable method for industrial aluminum smelting since its inception more than 100 years ago. In this process, the current flows through the aluminum guide rod, anode steel claw, anode, electrolyte, aluminum liquid, cathode carbon block, steel rod and busbar system in sequence. A 90-degree turn occurs in the block and the cathode steel rod, and since the resistance of the aluminum liquid is much smaller than that of the cathode carbon block, a large part of the deflection of the current occurs in the aluminum liquid layer, resulting in the horizontal current component in the aluminum liquid. produce. The horizontal current not only signific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/08
Inventor 张红亮李劼俆宇杰杨帅吕晓军田忠良
Owner CENT SOUTH UNIV
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