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Low polar distance energy-saving production method for aluminum electrolysis bath

A production method and aluminum electrolytic cell technology, which is applied in the field of electrolytic aluminum production technology, can solve the problems of inability to maintain stable operation and high DC power consumption per ton of aluminum, and achieve the effects of strengthening fine management, reducing energy consumption, and reducing superheat

Inactive Publication Date: 2010-06-02
HENAN ZHONGFU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional operation process is mainly to adjust the electrolyte composition at a high pole distance, that is, a higher cell working voltage, to form a low molecular ratio electrolyte composition, so as to achieve low-temperature electrolysis production under high voltage and improve current efficiency. , but this production process leads to higher DC power consumption per ton of aluminum
[0003] Because the traditional process determines the production state at a higher pole distance of the electrolytic cell, it cannot maintain stable operation at a lower working voltage or pole distance

Method used

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Effect test

Embodiment

[0015] Embodiment: An energy-saving production method with low pole distance for an aluminum electrolytic cell, including a conventional production method, the process parameters adopted are as follows:

[0016] A. Voltage adjustment: Adjust the set voltage of the electrolyzer from 4.2v to 4.1V within 14 days in the first two weeks; adjust the set voltage of the electrolyzer from 4.1v to 4.05V in the third week; adjust the set voltage of the electrolyzer in the fourth week Adjust from 4.05v to 4.0V; adjust the set voltage of the electrolyzer from 4.0v to 3.99V in the fifth week; carry out specific treatment for individual unsuitable electrolyzers.

[0017] B. Two-level adjustment: add cryolite or electrolyte blocks to increase the height of the electrolyte by 1-2cm, which can stabilize the temperature and composition of the electrolyte. Then adjust the aluminum level in two cycles, gradually increase the aluminum level by an average of about 1-2cm in 3-5 weeks, gradually incre...

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PUM

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Abstract

The invention discloses a low polar distance energy-saving manufacturing method for an aluminum cell, which meets the requirement of energy balance by adjustment of technical parameters on the basis of the prior art, comprising the steps that: firstly, voltage adjustment, namely the set voltage of the electrolytic cells is adjusted to be 4.1 volts in the first two weeks, adjusted from 4.1 volts to4.05 volts in the third week, adjusted from 4.05 volts to 4.0 volts in the fourth week and adjusted from 4.0 volts to 3.99 volts in the fifth week; secondly, adjustment of the aluminum level and theelectrolyte level, namely cryolites or electrolyte blocks are added for improving 1 to 2 centimeters of the electrolyte height and the aluminum level is improved 1 to 2 centimeters or so by use of three to five weeks; thirdly, improvement of the molecule ratio and reduction of the superheat degree, namely the molecule ratio is improved from the prior 2.2 to 2.3 to 2.35 to 2.45 within three to fiveweeks by adoption of the method for reducing the addition amount of aluminum fluorides. The improvement of the primary crystal temperature and the reduction of the superheat degree play an importantrole in stabilizing electrolyte production, play a certain role in formation of a hearthside and a furnace cavity, and enable the hearthside and the furnace cavity to enter the state of normal production in advance.

Description

Technical field: [0001] The invention relates to a production process of electrolytic aluminum, in particular to an energy-saving production method with low pole distance of an aluminum electrolytic cell. Background technique: [0002] With the development of aluminum electrolysis today, energy saving and high efficiency are the inevitable way. Therefore, how to save energy and produce efficiently has become an industry research topic. At present, the domestic electrolytic aluminum industry still generally adopts the traditional operation process of high pole distance, low molecular ratio, and blindly pursuing low bath temperature. The obvious defect is still the high power consumption per ton of aluminum; Aluminum costs have been greatly affected. If the cell voltage is reduced too much, the heat balance of the electrolytic cell will be damaged due to the influence of the general electrolyte composition, and it will not be possible to maintain a regular and good internal s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/06
Inventor 张松江岳世豹康定军
Owner HENAN ZHONGFU IND
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