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Method for treating waste electrolyte generated in production of electrolytic aluminium

A waste electrolyte and electrolytic aluminum technology, which is applied in the field of waste electrolyte in the production of electrolytic aluminum, can solve the problems of extra consumption of carbon anodes, large consumption, and accumulation of waste cryolite that cannot be processed, so as to reduce additional consumption, prolong service life, The effect of reducing exposure

Inactive Publication Date: 2014-08-06
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

[0005] Purpose of the present invention: the present invention provides a method for effectively treating waste electrolytes in the production process of electrolytic aluminum and protecting carbon anodes for electrolytic aluminum. Problems in consuming a lot of energy and reducing production costs, etc., to protect the residual electrode of prebaked anodes and increase the service life of the anode, and effectively combine waste treatment with carbon anode protection

Method used

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  • Method for treating waste electrolyte generated in production of electrolytic aluminium
  • Method for treating waste electrolyte generated in production of electrolytic aluminium
  • Method for treating waste electrolyte generated in production of electrolytic aluminium

Examples

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example 1

[0017] Example 1 Application of water-based coating

[0018] The formulation of the coating is shown in Table 1

[0019] Table 1 Formulation of water-based coating

[0020]

[0021] The waste electrolyte produced by the overhaul of the electrolyzer and the treated product after the flue gas purification treatment of the electrolyzer

[0022] Note: The aggregate of the paint is 100%, and the other contents are the percentage of the aggregate

[0023] Prepare the coating according to the formula in Table 1, apply (or spray) the coating evenly on the upper surface and side upper surface of the carbon anode during the cooling stage of prebaked anode preparation, apply (or spray) 1 to 5 times, and the coating thickness 0.2 ~ 8mm, the coating can be composed of a single coating or a composite coating, and then dry the coating for industrial electrolytic aluminum production.

[0024] The results of the electrolytic cell test show that the electrolysis process is stable, the par...

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Abstract

The invention provides a method for treating a waste electrolyte generated in the production of electrolytic aluminium, and relates to the field of non-ferrous metal metallurgy fused salt electrolysis. According to the method, a water-based paint is prepared with the waste electrolyte, the paint is uniformly painted on the side upper surface and the upper surface of a carbon anode in the cooling stage of preparationof a pre-baked anode, the paint layer is dried, and the paint layer has a function of protecting the anode in the process of aluminum electrolysis. The method for treating the waste electrolyte generated in the production of the electrolytic aluminium has the advantages that the problems existing in the aspects that the environment pollution caused by harmful gases is reduced, the energy consumption is reduced, the manufacturing cost is reduced and the like, and the problem of recycling of the waste electrolyte are solved, and furthermore, the problem of extra consumption of the pre-baked anode in the process of aluminum electrolysis is solved.

Description

technical field [0001] The invention relates to the field of molten salt electrolysis of non-ferrous metallurgy, and mainly solves the problem that waste cryolite cannot be effectively treated in the production process of electrolytic aluminum and protects the carbon anode used for electrolytic aluminum. It is coated on the surface of the carbon anode to reduce the oxidation of the carbon anode in the process of aluminum electrolysis, to protect the residual electrode of the prebaked anode and to increase the service life of the anode. Background technique [0002] The Hall-Elu method used in the metal aluminum electrolysis industry uses high-temperature and highly corrosive cryolite melt in the production of aluminum electrolysis. Among various materials, it can withstand high temperatures and resist this corrosion, price Only carbon products are cheap and have good electrical conductivity. [0003] Carbon anode (also called graphite anode), during electrolysis, the anode ...

Claims

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Application Information

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IPC IPC(8): C25C3/12C25C3/06
Inventor 曹大力
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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