CN104928718B - Electrolytic cell production technology - Google Patents
Electrolytic cell production technology Download PDFInfo
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- CN104928718B CN104928718B CN201410097358.0A CN201410097358A CN104928718B CN 104928718 B CN104928718 B CN 104928718B CN 201410097358 A CN201410097358 A CN 201410097358A CN 104928718 B CN104928718 B CN 104928718B
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Abstract
The invention provides a kind of electrolytic cell production technology, including normal period management and improper period management, the improper period management is divided into initial start stage management and starts final-period management.The invention discloses the cutting mode and its parameter of continuous blanking under aluminum oxide, disclose again the electrolyte level control of the startup final-period management in the improper period management of electrolytic cell production, electrolyte composition control, aluminium water highly control, the parameter value in voltage management.Compared with correlation technique, electrolytic cell production technology of the present invention is used, alumina concentration value fluctuation range is small, solve because single alumina blanking amount is larger, partial oxidation aluminium has little time to dissolve and sink to aluminium liquid or furnace bottom, is deposited on negative electrode, causes cathode resistor to increase, the problem of cathode drop increase, electrolysis energy consumption increase.So as to improve current efficiency, bearth precipitation is reduced, hearth and bottom is reduced, energy consumption is saved.
Description
【Technical field】
The present invention relates to technical field of aluminum electrolysis, more particularly to a kind of electrolytic cell production technology.
【Background technology】
In correlation technique, in aluminium cell production, 300kA electrolytic cells carry out electricity using batch oxidation aluminium cutting mode
Aluminium production is solved, i.e., every the lower 1.2kg aluminum oxide of 150s or so.
Generally calling improper period management, time one to the management for being transferred to normal production this period after electrobath start
As at 3 months or so, what rational technological parameter was set during this results in regular burner hearth.Improper period management can
It is divided into initial start stage management and starts final-period management.
Initial start stage management refers to artifact effect after electrobath start and extinguished to the management gone out for the first time during aluminium, and the time is
48h.Including：Electrolyte ingredient management, tank voltage management, bath temperature management, electrolyte level management.
Startup final-period management referred to the management after electrobath start after hot stage two days later, for up to 2~3 months.
Including following content.
1）Electrolyte level is controlled, and first month 25~30cm of the last fortnight is down to 24cm or so, second in the 3rd week to the end of month
The moon plays 17-24cm.
2）Electrolyte composition control, the sodium fluoride in electrolyte ingredient in the production of first month electrolytic cell rubs with aluminum fluoride
The ratio between your content is month 2.3-2.6 of more than 2.8, second month 2.6-2.8, the 3rd.
3）Aluminium water is highly controlled, first month 18-23cm, second month 23-25cm, the 3rd month 25-30cm.
4）Voltage management, 4.20~4.25V of first month, 4.15~4.20V of second month are down to normal after the 3rd month
3.6~3.8V of scope of production period.
5）Concentration is controlled（Exemplified by single-point 1.2kg discharge quantities）, first month blanking interval 70-80s, under second month is later
Material interval 68-75s.
The defect of present technology：1）Using compartment blanking, single discharge quantity is more, and alumina concentration fluctuation is obvious, blanking
Preceding concentration is low, and concentration is high after blanking, and the fluctuation of groove thermal balance is big, influences the stability and current efficiency of electrolytic cell.2）Single is aoxidized
Aluminium discharge quantity is larger, and partial oxidation aluminium has little time to dissolve and sink to aluminium liquid or furnace bottom.The alumina buildup of furnace bottom is sunk in negative electrode
On, cause cathode resistor to increase, cathode drop increase, electrolysis energy consumption increase.
Therefore, it is necessary that providing a kind of new electrolytic cell production technology solves above-mentioned technical problem in fact.
【The content of the invention】
The technical problem that the present invention need to be solved is to overcome the shortcomings of technical background there is provided oxygen in a kind of electrolytic cell production process
Change aluminum concentration value and fluctuate small electrolytic cell production technology.
A kind of electrolytic cell production technology, including normal period management and improper period management, the improper period management are divided into
Initial start stage manages and started final-period management.Wherein, in the normal period management and improper period management, using continuously not
The mode of the blanking of interruption carries out alumina blanking, and blanking velocity is 7~80g/s.
In the startup final-period management, including electrolyte level control, electrolyte composition control, aluminium water highly control,
Voltage management.
Electrolyte level is controlled：It is 23~25cm, the 3rd week to head to start the last fortnight electrolyte level in final-period management
The end of month electrolyte level is 23~21cm, and it is 17~21cm that second month, which plays electrolyte level,.
Electrolyte composition control：Start the fluorine in the electrolyte ingredient in the first month electrolytic cell production in final-period management
It is 2.6~2.8 to change the ratio between sodium and aluminum fluoride molar content, and second month is 2.4~2.6, is within the 3rd month 2.24~2.4.
Aluminium water is highly controlled, and it is highly 23~25cm, second month to start the first month in final-period management and start aluminium water
It is within the 3rd month 29~30cm for 25~28cm.
Voltage management, it is 4.1~4.2V to start the first month voltage in final-period management, and second month is 4.0~4.1V,
It is within three month 3.95~4.0V.
Preferably, the blanking velocity 8g/s.Electrolyte level is controlled：Start first week electrolyte level of final-period management
For 25cm, second week is 23cm, is within the 3rd week 22cm, and 4th week is 21cm, and it is 18cm that second month, which plays electrolyte level,.Electrolysis
Matter composition control：The sodium fluoride started in the electrolyte ingredient in the first month electrolytic cell production of final-period management rubs with aluminum fluoride
The ratio between your content is 2.7, and second month is 2.5, is within the 3rd month 2.4.Aluminium water is highly controlled, and starts first of final-period management
It is highly 23cm to start aluminium water the moon, and second month is 25cm, is within the 3rd month 29cm.Voltage management, starts the of final-period management
Voltage is 4.2V within one month, and second month is 4.1V, is within the 3rd month 4.0V.
Compared with correlation technique, after electrolytic cell production technology of the present invention, alumina concentration value fluctuation range is small, solves
Because single alumina blanking amount is larger, partial oxidation aluminium has little time to dissolve and sink to aluminium liquid or furnace bottom, is deposited on negative electrode, makes
Into cathode resistor increase, cathode drop increase, the problem of electrolysis energy consumption increase.So as to improve current efficiency, furnace bottom is reduced
Precipitation, reduces hearth and bottom, saves energy consumption.
【Embodiment】
With reference to embodiment, the invention will be further described, exemplified by later 300kA electrolytic cells.
A kind of 300kA electrolytic cells, totally 6 blanking points, alumina blanking is carried out by the way of continuous uninterrupted blanking, under
Expect speed 8g/s.
Electrolyte level is controlled：First week electrolyte level for starting final-period management is 25cm, and second week is 23cm, the 3rd
Week is 22cm, and 4th week is 21cm, and it is 18cm that second month, which plays electrolyte level,.
Electrolyte composition control：Start the fluorination in the electrolyte ingredient in the first month electrolytic cell production of final-period management
The ratio between sodium and aluminum fluoride molar content are 2.7, second month 2.5, the 3rd month 2.4.
Aluminium water is highly controlled, and the first month startup aluminium water for starting final-period management is highly 23cm, and second month is 25cm,
It is within three month 29cm.
Voltage management, the first month voltage for starting final-period management is 4.2V, and second month is 4.1V, is within the 3rd month
4.0V。
Compared with correlation technique, after electrolytic cell production technology of the present invention, alumina concentration value fluctuation range is small, solves
Because single alumina blanking amount is larger, partial oxidation aluminium has little time to dissolve and sink to aluminium liquid or furnace bottom, is deposited on negative electrode, makes
Into cathode resistor increase, cathode drop increase, the problem of electrolysis energy consumption increase.So as to improve current efficiency, furnace bottom is reduced
Precipitation, reduces hearth and bottom, saves energy consumption.
Above-described is only embodiments of the present invention, it should be noted here that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to the protection model of the present invention
Enclose.
Claims (2)
1. a kind of electrolytic cell production technology, including normal period management and improper period management, the improper period management, which is divided into, to be opened
Dynamic initial management and startup final-period management, in the startup final-period management, including electrolyte level control, electrolyte composition control
System, aluminium water are highly controlled, voltage management；Characterized in that, in the startup final-period management, in electrolyte level control
During：The last fortnight electrolyte level started in final-period management is 23~25cm, is electrolysed within the 3rd week to last day at the bottom of the first month
Matter is highly 23~21cm, and it is 17~21cm that second month, which plays electrolyte level,；During the electrolyte composition control：Open
The ratio between sodium fluoride in the electrolyte ingredient in the production of first month electrolytic cell in dynamic final-period management and aluminum fluoride molar content
For 2.6~2.8, second month is 2.4~2.6, is within the 3rd month 2.24~2.4；In the aluminium water height control process, open
It is highly 23~25cm that first month in dynamic final-period management, which starts aluminium water, and second month is 25~28cm, is within the 3rd month 29
~30cm；During the voltage management, it is 4.1~4.2V, second month to start the first month voltage in final-period management
It is within the 3rd month 3.95~4.0V for 4.0~4.1V；In the normal period management and improper period management, using continuous
The mode of continual blanking carries out alumina blanking, and blanking velocity is 7~80g/s.
2. electrolytic cell production technology according to claim 1, it is characterised in that in the electrolyte level control process：
First week electrolyte level for starting final-period management is 25cm, and second week is 23cm, and the 3rd week is 22cm, and 4th week is 21cm,
It is 18cm that second month, which plays electrolyte level,；During the electrolyte composition control：Start the first month electricity of final-period management
It is 2.7 to solve the ratio between sodium fluoride and aluminum fluoride molar content in the electrolyte ingredient in groove production, and second month is the 2.5, the 3rd
It is within individual month 2.4；In the aluminium water height control process, the first month startup aluminium water for starting final-period management is highly 23cm, the
It is within two months 25cm, is within the 3rd month 29cm；During the voltage management, the first month voltage for starting final-period management is
4.2V, second month is 4.1V, is within the 3rd month 4.0V；The blanking velocity 8g/s.
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| CN201410097358.0A CN104928718B (en) | 2014-03-17 | 2014-03-17 | Electrolytic cell production technology |
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| CN201410097358.0A CN104928718B (en) | 2014-03-17 | 2014-03-17 | Electrolytic cell production technology |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5810996B2 (en) * | 1979-05-02 | 1983-02-28 | 三井アルミニウム工業株式会社 | Method for controlling alumina supply to an aluminum electrolyzer |
| AU645567B2 (en) * | 1990-10-05 | 1994-01-20 | Portland Smelter Services Pty. Ltd. | Apparatus for controlled supply of alumina |
| CN100532652C (en) * | 2006-04-28 | 2009-08-26 | 中国铝业股份有限公司 | Preparation method of aluminum electrobath for transitting to electrolysis in low temperature |
| CN101225531A (en) * | 2007-09-30 | 2008-07-23 | 中国铝业股份有限公司 | Aluminum reduction cell alumina dense-phase conveying system accurate feeding technique |
| CN101260541B (en) * | 2007-11-28 | 2010-04-14 | 河南中孚实业股份有限公司 | Fast voltage-reducing energy-saving starting method for aluminum electrolysis bath |
| CN101260542B (en) * | 2007-11-28 | 2010-06-02 | 河南中孚实业股份有限公司 | Low polar distance energy-saving production method for aluminum electrolysis bath |
| CN103088366B (en) * | 2013-02-27 | 2015-09-02 | 云南铝业股份有限公司 | The energy-efficient hot-fluid coke grain calcination startup method of a kind of electrolysis of aluminum |
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Effective date of registration: 20170817 Address after: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Applicant after: Suntown Technology Group Corporation Address before: Taoyuan County in Hunan province Changde city 415700 disk town Chuangyuan Industrial Park Applicant before: Hunan Chuangyuan Aluminium Industry Co., Ltd. |
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Effective date of registration: 20200917 Address after: 533821 Jingxi, Baise, the Guangxi Zhuang Autonomous Region Patentee after: GUANGXI XINFA ALUMINUM ELECTRIC Co.,Ltd. Address before: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Patentee before: SNTO TECHNOLOGY GROUP Co.,Ltd. |
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