Dry type anti-seepage material used in aluminum electrolytic cell

An aluminum electrolytic cell, dry type technology, applied in the field of dry type anti-seepage materials for aluminum electrolytic cells, can solve the problems of dust generation, air pollution, biological hazards, etc., and achieve the effects of prolonging life, reducing heat dissipation, and low thermal conductivity

Inactive Publication Date: 2017-04-19
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause river silting, and the toxic chemicals in it will also cause harm to humans and organisms

Method used

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  • Dry type anti-seepage material used in aluminum electrolytic cell
  • Dry type anti-seepage material used in aluminum electrolytic cell
  • Dry type anti-seepage material used in aluminum electrolytic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Proportioning according to the mass ratio: 50 parts of coke gemstone, 40 parts of fly ash, 5 parts of quicklime additive, and 5 parts of quartz. The particle size ratio is: 20% of the particle size of 5-3mm, 15% of the particle size of 3-1mm, 10% of the particle size of 1-0.05mm, and 55% of the powder below 0.05mm. Lay a layer of the above-mentioned dry anti-seepage material layer on the surface of the refractory material of the electrolytic cell, when cryolite or gaseous Na + After NaF penetrates below the cathode carbon block, it reacts with the dry anti-seepage material to form a dense glassy nepheline barrier layer on its surface, thereby preventing the continuous penetration of liquid electrolyte. The reaction of the anti-seepage material under the barrier layer is kept loose, and the integrity and volume stability are good.

Embodiment 2

[0018] Proportion according to mass ratio: 60 parts of coke gemstone, 33 parts of fly ash, 5 parts of additive magnesia, and 2 parts of calcium aluminate cement. The particle size ratio is: 25% of the particle size of 5-3mm, 20% of the particle size of 3-1mm, 15% of the particle size of 1-0.05mm, and 40% of the powder below 0.05mm. Lay a layer of the above-mentioned dry anti-seepage material layer on the surface of the refractory material of the electrolytic cell, when cryolite or gaseous Na + After NaF penetrates below the cathode carbon block, it reacts with the dry anti-seepage material to form a dense glassy nepheline barrier layer on its surface, thereby preventing the continuous penetration of liquid electrolyte. The reaction of the anti-seepage material under the barrier layer is kept loose, and the integrity and volume stability are good.

Embodiment 3

[0020] Proportion according to mass ratio: 53 parts of coke gemstone, 38 parts of fly ash, 4 parts of additive magnesia, and 5 parts of quartz. Aggregate abrasive screening, 23% of the particle size is 5‐3mm, 18% of the particle size is 3‐1mm, 16% of the particle size is 1‐0.05mm, and 43% of the powder below 0.05mm. Lay a layer of the above-mentioned dry anti-seepage material layer on the surface of the refractory material of the electrolytic cell, when cryolite or gaseous Na + After NaF penetrates below the cathode carbon block, it reacts with the dry anti-seepage material to form a dense glassy nepheline barrier layer on its surface, thereby preventing the continuous penetration of liquid electrolyte. The reaction of the anti-seepage material under the barrier layer is kept loose, and the integrity and volume stability are good.

[0021] The present invention adopts a preferred formula and reasonable particle gradation, and the following table is a comparison between the pe...

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PUM

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Abstract

The invention relates to a dry type anti-seepage material used in an aluminum electrolytic cell. The anti-seepage material includes, by mass, 45-60% of flint clay, 25-40% of fly ash, and 5-20% of an additive comprising one or more selected from quicklime, magnesia, quartz and calcium aluminate cement. The anti-seepage material has super-strong anti-electrolyte-seepage capability and is low in heat conductivity coefficient, can effectively reduce bottom heat dissipation of the electrolytic cell and prolongs the service life of the electrolytic cell.

Description

technical field [0001] The invention relates to a dry anti-seepage material for an aluminum electrolytic cell. Background technique [0002] The aluminum electrolytic cell is the main equipment for aluminum electrolytic production. The refractory material for the aluminum electrolytic cell will be infiltrated by the electrolyte molten salt or gaseous Na from the cathode carbon block at high temperature. + , NaF and other corrosion, resulting in damage to the structure of the refractory material layer, or further penetration will eventually lead to leakage of the electrolytic tank, and the tank must be shut down for overhaul. The overhaul cost allocation of the electrolytic cell is an important part of the cost of electrolytic aluminum. In the modern aluminum electrolysis industry, the overhaul cost allocation of the electrolytic cell can account for more than 1% of the total cost of primary aluminum. [0003] Fly ash is one of the largest industrial wastes in my country. Wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C25C3/08
CPCC04B35/66C04B2235/3206C04B2235/3208C04B2235/3418C04B2235/349C04B2235/5427C04B2235/5436C04B2235/9607C25C3/08
Inventor 汪艳芳张亚楠柴登鹏张芬萍侯光辉刘卓李昌林周云峰
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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