Molecular ratio-based aluminum electrolysis energy balance adjusting method and system and aluminum electrolytic cell

A technology of energy balance and adjustment method, which is applied in the field of energy saving of aluminum electrolytic cells, can solve problems such as difficult state of electrolytic process optimization, less real-time data collection, difficulty in realizing optimal aluminum electrolytic process, etc., to achieve safety, stability, energy saving optimization, cycle time short effect
CN112210794AActive Publication Date: 2021-01-12ZHENGZHOU LIGHT METAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHENGZHOU LIGHT METAL TECH
Publication Date
2021-01-12

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Abstract

The invention relates to a molecular ratio-based aluminum electrolysis energy balance adjusting method and system and an aluminum electrolytic cell. The method comprises the steps of: (1) presetting standard electrolyte temperature intervals under different molecular ratios, and collecting an electrolyte temperature measurement value and a molecular ratio measurement value; and (2) comparing the electrolyte temperature measurement value with the corresponding standard electrolyte temperature interval, and if the electrolyte temperature measurement value is higher than the upper limit of the interval, increasing the heat exchange amount of the cell wall through control, if the electrolyte temperature measurement value is lower than the lower limit of the interval, reducing the heat exchangeamount of the cell wall through control, and if the electrolyte temperature measurement value is within the interval range, not carrying out adjusting. Heat balance of the electrolytic cell is reversely adjusted from a heat dissipation side of the electrolytic cell and is independent of energy balance and material balance adjusting parameters of an input end, so that decoupling control over the superheat degree (electrolyte temperature) of the electrolytic cell and other technological parameters is achieved, electrolytic aluminum performance optimization and stable operation during energy input fluctuation can be achieved, and a good energy-saving effect is achieved.
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Description

technical field

[0001] The invention relates to a molecular ratio-based aluminum electrolysis energy balance adjustment method, system and aluminum electrolytic cell, belonging to the technical field of aluminum electrolytic cell energy saving. Background technique

[0002] The industrial production of aluminum electrolysis adopts cryolite-alumina molten salt electrolysis method. The so-called cryolite-alumina molten salt is a multiphase electrolyte system composed of cryolite-based fluoride salt as a flux and alumina as a melt. The carbon body is used as the anode, and the aluminum liquid is used as the cathode. After a strong direct current is passed through, the electrochemical reaction is carried out on the two electrodes in the electrolytic cell at 920 ° C to 970 ° C. The chemical reaction is mainly carried out by the following equation: 2Al 2 o 3 +3C=4Al+3CO 2 . The anode products are mainly carbon dioxide and carbon monoxide gas, and the cathode products are alum...

Claims

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