CN103352238A - Method for improving electrolyte viscosity of aluminum reduction cell - Google Patents
Method for improving electrolyte viscosity of aluminum reduction cell Download PDFInfo
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- CN103352238A CN103352238A CN2013102576177A CN201310257617A CN103352238A CN 103352238 A CN103352238 A CN 103352238A CN 2013102576177 A CN2013102576177 A CN 2013102576177A CN 201310257617 A CN201310257617 A CN 201310257617A CN 103352238 A CN103352238 A CN 103352238A
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- reduction cell
- aluminum reduction
- ionogen
- viscosity
- improving
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Abstract
The invention discloses a method for improving electrolyte viscosity of an aluminum reduction cell, which comprises the following steps of: (1) raising working voltage by 5mv to 10mv; (2) reducing the molecular ratio of NaF/AlF3 to 0.1-0.2; (3) adjusting blanking NB interval and reducing alumina density to 1.5%-3.0%. Meanwhile, the aluminum reduction cell is insulated by the means of electrical heating to lessen heat loss. The method can be used for overcoming adverse factors caused by the hyperviscosity of electrolyte for aluminium electrolysis, lowering the labour intensity of workers, improving the production stability of the aluminum reduction cell, and guaranteeing the efficient and steady production of the aluminum reduction cell.
Description
Technical field
The invention belongs to the aluminum electrolysis technology field, particularly a kind of method of improving aluminum cell electrolyte viscosity.
Background technology
In aluminium cell is produced, because ionogen has certain viscosity, ionogen viscosity and the electrolyte superheat degree relation of being inversely proportional to, namely superheating temperature is less, and viscosity is just larger.The alumina concentration height is proportional with ionogen viscosity, and namely alumina concentration is larger, and viscosity is larger.In crust-breaking ﹠ baiting process frequently, will adhere on the crust-breaking chips from level to level ionogen and the mixture of aluminum oxide, finally form shell head bag.Shell head bag can affect the normal crust-breaking ﹠ baiting of electrolyzer, and blanking is not smooth again, easily causes anode effect, and makes in the ionogen alumina concentration control unbalance, has a strong impact on current efficiency and steadily produces.In addition, ionogen viscosity is excessive, causes alumina dissolution poor, simultaneously, the carbon slag is not easily separated in the groove, and anodic gas is difficult for discharging, and causes the ionogen pressure drop excessive, the unfavorable factors such as average voltage rising, the poor stability of electrolyzer has a strong impact on current efficiency and steadily production.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of method of improving aluminum cell electrolyte viscosity, solved the excessive unfavorable factor that causes of Aluminium Electrolysis ionogen viscosity, reduced labor strength, improve the electrolyzer production stability, guaranteed the production of electrolyzer high efficiency smooth.
To achieve these goals, the technical solution used in the present invention is:
A kind of method of improving aluminum cell electrolyte viscosity comprises following content:
1) improves operating voltage 5～10mv;
2) reduce NaF/AlF
3Molecular ratio 0.1～0.2;
3) adjust blanking NB interval, alumina concentration is down to 1.5～3.0%.
When carrying out foregoing, by Electric heating electrolyzer is incubated, to reduce thermosteresis.
Simultaneously, be in operation and will take following scheme:
1) improve the pole changing operational quality, take off clean anode scrap buoyant, add stifled good anode seam in the insulation material process, piece material and fines adding proportion press the 1:1 collocation, avoid thin a large amount of material to enter in the groove and the alumina concentration that causes disorder and the increase of ionogen viscosity as far as possible.
2) strengthen the inspection of electrolyzer blanking system, for blanking point leak material, the buildup phenomenon is in time processed, and takes off first clean buildup in the treating processes, opens feed opening again, forbids not pull out material and directly opens feed opening, avoids buildup to enter in the groove in a large number.
3) carry out the breeze fishing job, the solvability of accelerating oxidation aluminium and the discharge of anodic gas reduce the ionogen pressure drop, improve virtual voltage.
Thus, can reach raising superheating temperature, reduction alumina concentration, reduction ionogen viscosity purpose.
Compared with prior art, the invention has the beneficial effects as follows:
1. ionogen viscosity is obviously improved, and aluminum oxide solvability in ionogen strengthens, and burst effect and shell head bag phenomenon obviously reduce, and the electrolyzer production stability is improved, and greatly reduces worker's labour intensity.
2. avoided greatly that the electrolyzer blanking is smooth and the alumina concentration balance phenomenon that produces has promoted the discharge of anodic gas, reduced the ionogen pressure drop, improved virtual voltage, guaranteed the production of electrolyzer high efficiency smooth.
Embodiment
Describe embodiments of the present invention in detail below in conjunction with embodiment.
Take the 180KA aluminium cell as example:
1. the adjustment of technology condition:
Choose representative A groove as implementing groove, this groove occurs that ionogen is clamminess, ionogen is in the phenomenon of aluminium flowing-out mouth and the place's splash of blanking point pinkeye, and burst effect and shell head bag increase.This groove molecular ratio high (2.6) by analysis, alumina concentration higher (4.0%), superheating temperature is on the low side (5.8 ℃).For above analysis this groove parameter is done following adjustment:
1) operating voltage is improved 5mv to 4.050V; And strengthen the electrolyzer insulation, reduce thermosteresis;
2) addition of increasing aluminum fluoride is reduced to 2.45 with molecular ratio;
3) suitably widen blanking NB interval, namely the blanking interval extended to 130 seconds from 125 seconds, guaranteed that computer to the normal control of aluminum oxide addition, is reduced to 2.5% with alumina concentration.
4) guarantee the operations quality, forbid a large amount of materials to concentrate to enter and cause alumina concentration unbalance in the groove; The diligent breeze of salvaging guarantees the ionogen cleaning, strengthens the ability that effluxes of alumina dissolution and anodic gas.
Take Insulation in the process, to reduce heat waste.
Table 1A groove technical parameter adjustment sheet
Through above adjustment, this groove electrolyte primary crystal temperature is reduced to 918.5 ℃ from 920.2 ℃, and the groove temperature is increased to 929 ℃ from 926 ℃, and superheating temperature is increased to 10.5 ℃ from 5.8 ℃, can satisfy the normal requirement of producing of electrolyzer.
Through after the above technological adjustment, ionogen viscosity is obviously improved, and ionogen is cleaner, aluminum oxide can in time be dissolved in the ionogen, ionogen disappears in the phenomenon of aluminium flowing-out mouth and the place's splash of blanking point pinkeye, and burst effect and shell head bag reduce, and have reached purpose of design.
Claims (2)
1. a method of improving aluminum cell electrolyte viscosity is characterized in that, comprises following content:
1) improves operating voltage 5～10mv;
2) reduce NaF/AlF
3Molecular ratio 0.1～0.2;
3) adjust blanking NB interval, alumina concentration is down to 1.5～3.0%.
2. the method for improving aluminum cell electrolyte viscosity according to claim 1 is characterized in that, when carrying out foregoing, by Electric heating electrolyzer is incubated, to reduce thermosteresis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102576177A CN103352238A (en) | 2013-06-25 | 2013-06-25 | Method for improving electrolyte viscosity of aluminum reduction cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102576177A CN103352238A (en) | 2013-06-25 | 2013-06-25 | Method for improving electrolyte viscosity of aluminum reduction cell |
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| Publication Number | Publication Date |
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| CN103352238A true CN103352238A (en) | 2013-10-16 |
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| CN2013102576177A Pending CN103352238A (en) | 2013-06-25 | 2013-06-25 | Method for improving electrolyte viscosity of aluminum reduction cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386085A (en) * | 2015-11-23 | 2016-03-09 | 林州市林丰铝电有限责任公司 | Method for stabilizing continuous production of 400 KA aluminum electrolytic cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201183832Y (en) * | 2008-03-31 | 2009-01-21 | 中国铝业股份有限公司 | Block dragging apparatus special for aluminum cell |
| CN201367474Y (en) * | 2008-12-31 | 2009-12-23 | 包头铝业有限公司 | Pole setting device for pole changing of aluminum electrolytic cell |
| CN102051639A (en) * | 2011-01-30 | 2011-05-11 | 中国铝业股份有限公司 | Method for eliminating crust breaking chip bulge of aluminum cell |
| CN202610347U (en) * | 2012-05-22 | 2012-12-19 | 中国铝业股份有限公司 | Detachable sleeve-type coal residue fishing tool for electrolyte of aluminum electrolysis |
-
2013
- 2013-06-25 CN CN2013102576177A patent/CN103352238A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201183832Y (en) * | 2008-03-31 | 2009-01-21 | 中国铝业股份有限公司 | Block dragging apparatus special for aluminum cell |
| CN201367474Y (en) * | 2008-12-31 | 2009-12-23 | 包头铝业有限公司 | Pole setting device for pole changing of aluminum electrolytic cell |
| CN102051639A (en) * | 2011-01-30 | 2011-05-11 | 中国铝业股份有限公司 | Method for eliminating crust breaking chip bulge of aluminum cell |
| CN202610347U (en) * | 2012-05-22 | 2012-12-19 | 中国铝业股份有限公司 | Detachable sleeve-type coal residue fishing tool for electrolyte of aluminum electrolysis |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386085A (en) * | 2015-11-23 | 2016-03-09 | 林州市林丰铝电有限责任公司 | Method for stabilizing continuous production of 400 KA aluminum electrolytic cell |
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Application publication date: 20131016 |
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