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Energy saving method under complicated electrolyte system in aluminum electrolytic tank

An aluminum electrolytic cell and electrolyte technology, which is applied in the field of energy saving and consumption reduction, can solve problems such as unstable operation of the electrolytic cell, lower primary crystal temperature, and lower current efficiency, so as to ensure melting speed and solubility, alleviate the drop in cell temperature, and prevent the cathode The effect of increased current density

Inactive Publication Date: 2014-01-15
HENAN ZHONGFU IND
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Problems solved by technology

[0003] The purpose of the present invention is to provide an energy-saving method under the complex electrolyte system in the aluminum electrolytic cell, to overcome the existing problems of the complex electrolyte system in the aluminum electrolytic cell due to the primary crystal Defects of lower temperature, unstable operation of the electrolytic cell, lower current efficiency, and greatly increased energy consumption

Method used

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Embodiment 1

[0018] A method for saving energy in an aluminum electrolytic cell with a complex electrolyte system, the technical parameters of which are as follows:

[0019] On the basis of the existing electrolyte system, calcium fluoride is added to increase the calcium content in the tank to make the calcium content reach 7%.

[0020] Increase the working voltage to stabilize the working voltage at about 3.95V.

[0021] Strengthen the current, the strengthening ratio is 2.75%, which is 1.0275 times of the original.

[0022] Increase the side thickness to 10cm.

[0023] Table 1 shows the corresponding situation and power consumption of the electrolyte system before and after transformation.

[0024] name unit Transformation of the former After transformation calcium fluoride % 4-5 7-8 Operating Voltage V 3.9 3.95 current intensity KA 400 411 current efficiency % 89 91.5 Side Thickness cm 6 10 DC power consumption Kwh / t-al...

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Abstract

The invention relates to an energy saving method under a complicated electrolyte system in an aluminum electrolytic tank. According to the invention, on the basis of an existing electrolyte system, a part of additive is added, such that various components in the electrolyte system reach an appropriate ratio, and electrolytic tank thermal balance is maintained, and an appropriate molecular ratio is reached. Also, working voltage is adjusted, and current is enhanced, such that electrolytic tank operation status is stabled, current efficiency is improved, power consumption for each ton of aluminum is reduced, and production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy saving and consumption reduction, and in particular relates to an energy saving method under a complex electrolyte system in an aluminum electrolytic cell. Background technique [0002] The usual electrolyte systems for aluminum electrolytic production are binary and ternary systems, that is, the electrolyte components are composed of sodium fluoride, aluminum fluoride and alumina. With the deep impact of the financial crisis, electrolytic aluminum enterprises are facing huge challenges in operation, and the use of domestic alumina is an effective way to reduce costs and increase efficiency. However, with the extensive use of domestic alumina, the original electrolyte system has been broken, and has developed into a complex electrolyte system with multiple systems. Various salts enter the electrolytic cell with alumina, making the electrolyte system in the cell more complicated. The main salts are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/18C25C3/16
Inventor 张松江康定军
Owner HENAN ZHONGFU IND
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