CN102251259A - Aluminum electrolyte system with high conductivity and high solvability - Google Patents
Aluminum electrolyte system with high conductivity and high solvability Download PDFInfo
- Publication number
- CN102251259A CN102251259A CN201110191355XA CN201110191355A CN102251259A CN 102251259 A CN102251259 A CN 102251259A CN 201110191355X A CN201110191355X A CN 201110191355XA CN 201110191355 A CN201110191355 A CN 201110191355A CN 102251259 A CN102251259 A CN 102251259A
- Authority
- CN
- China
- Prior art keywords
- content
- electrolyte system
- aluminum
- percent
- ionogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to an aluminum electrolysis industry, in particular to an aluminum electrolyte system with high conductivity and high solvability. The aluminum electrolyte system with high conductivity and high solvability comprises the following steps of: firstly, adding cryolite; and secondly, adding a proper amount of industrial sodium carbonate. The electrolyte system with high conductivity and high solvability comprises higher molecular proportion (2.6-2.65), a proper amount of LiF content (2.5-2.8 percent), lower CaF2 content (4.0-5.0 percent), lower MgF2 content (0.7-1.5 percent) and lower aluminum oxide concentration (1.0-3.0 percent). The invention has the advantages that: firstly, the electrical conductivity of the electrolyte is improved by about 10 percent, the voltage drop is reduced by 150-250mv and the aims of saving energy and reducing emission are achieved; and secondly, the dissolubility of the aluminum oxide is improved and the aluminum oxide concentration is maintained within a low-narrow zone of 1.0-3.0 percent. The aluminum electrolyte system disclosed by the invention is suitable for the aluminum electrolyte system with high conductivity and high solvability in the aluminum electrolysis production.
Description
Technical field
The present invention relates to the electrolysis of aluminum industry, specifically relate to a kind of aluminium electrolyte system with high conduction and high solubility.
Background technology
Dissolved oxygen aluminium and be it reaction medium of metallic aluminium through electrolytic reduction when ionogen is electrolysis of aluminum, ionogen promptly is that a kind of solvent is again the medium conductor of electricity.Therefore industrial have following performance requriements to ionogen: the one, and dissolved oxygen aluminium that can be good also has higher solubleness; The 2nd, ionogen has good electrical conductivity, makes electrolytical resistivity lower, helps reducing bath voltage and energy-conservation.Ionogen is a kind of molten system of complexity, and its composition comprises NaF, AlF
3(wherein NaF and AlF
3Ratio molecular ratio), aluminum oxide and other additive (LiF, CaF
2, MgF
2Deng), these compositions size of shared content in ionogen is determining physico-chemical properties such as electrolytical electric conductivity, solubleness.Below be the calculation formula of electrolyte conductivity: K=exp (2.0156-0.0207 (Al2O3%)-0.005 (CaF2%)-0.0166 (MgF2%)+0.0178 (LiF%)+0.0434 (BR)-2068.4/T)
The weight ratio of BR=NaF/AlF3 wherein; T=temperature (K)
This shows higher molecular ratio, higher LiF content, lower alumina concentration, CaF
2Content and MgF
2Content can make ionogen have higher specific conductivity, can reach the purpose that reduces the ionogen pressure drop.
Study verified, LiF, CaF
2, MgF
2Increase etc. content of additive, electrolytical solubility property will reduce, and improve molecular ratio, and electrolytical solubility property will raise.
The prior art electrolyte body is: molecular ratio (2.4-2.5), LiF(2.8-3.2%), CaF
2(5.0-7.0%), MgF
2(1.0-2.0%), this electrolyte system requires to also have bigger distance with the system of high conduction and high solubility, to this, we attempt the composition in the existing electrolyte system is optimized adjustment, to develop a kind of electrolyte system with high conduction and high solubility.
Summary of the invention
The technical problem to be solved in the present invention is the present situation that requires to also have big gap at the existing electrolyte system and the system of high conduction and high solubility, put forth effort to optimize and revise the component content in the electrolyte system, the aluminium electrolyte system of a kind of high conduction and high solubility is provided, fall to reach the reduction electrolyte voltage, accelerate the dissolution rate of aluminum oxide, guarantee the purpose that the electrolyzer efficient low-consume is produced.
The aluminium electrolyte system of a kind of high conduction of the present invention and high solubility is achieved by following technical proposals: the aluminium electrolyte system of a kind of high conduction of the present invention and high solubility is characterized in that described method comprises the steps:
The first step, be to point in the ionogen of electrolyzer to add sodium aluminum fluoride, reduce LiF, CaF in the ionogen
2And MgF
2Content, sodium aluminum fluoride have played the effect of diluting other composition as solute after the interpolation;
Second step, be to point to add an amount of Cao Da (industrial sodium carbonate) in the ionogen, improve the electrolyzer molecular ratio.
Described electrolyte body with high conduction and high solubility is: higher molecular ratio (2.60-2.65), moderate LiF content (2.5-2.8%), lower CaF
2The lower MgF of content (4.0-5.0%)
2Content (0.7-1.5%), lower alumina concentration (1.0-3.0%).
The aluminium electrolyte system of a kind of high conduction of the present invention and high solubility has following beneficial effect compared with prior art: the inventive method is by adding sodium aluminum fluoride, Cao Dahou, the ionogen pressure drop of electrolyzer is reduced to 1440mv from 1650mv, bath voltage is reduced to 3895mv from 4105mv, decrease by 210mv, alumina concentration is reduced to 2.3% from 3.5% in the ionogen, has reached purpose of design; Advantage of the present invention is: 1. the electrolyte system of high conduction and high solubility, and make electrolytical electric conductivity improve about 10%, electrolyte voltage reduces 150-250mv, has reached energy saving purposes; 2. aluminum oxide dissolution rate in ionogen is accelerated greatly, and alumina concentration can remain in the low narrow zone of 1.0-3.0%.The present invention is applicable to the electrolyte system that has high conduction and high solubility in the Aluminium Electrolysis.The present invention is that example is developed with the 180KA aluminium cell only, for other grooved, can carry out equally according to this.
Embodiment
Below in conjunction with embodiment the aluminium electrolyte system technical scheme of a kind of high conduction of the present invention and high solubility is further described.
The aluminium electrolyte system of a kind of high conduction of the present invention and high solubility is characterized in that described method comprises the steps:
The first step, be to point in the ionogen of electrolyzer to add sodium aluminum fluoride, reduce LiF, CaF in the ionogen
2And MgF
2Content, sodium aluminum fluoride have played the effect of diluting other composition as solute after the interpolation;
Second step, be to point to add an amount of Cao Da (industrial sodium carbonate) in the ionogen, improve the electrolyzer molecular ratio.
Described electrolyte body with high conduction and high solubility is: higher molecular ratio (2.60-2.65), moderate LiF content (2.5-2.8%), lower CaF
2The lower MgF of content (4.0-5.0%)
2Content (0.7-1.5%), lower alumina concentration (1.0-3.0%).
Embodiment 1
The aluminium electrolyte system of a kind of high conduction of the present invention and high solubility is characterized in that described method comprises the steps:
The first step, be to point in the ionogen of electrolyzer to add sodium aluminum fluoride, reduce LiF, CaF in the ionogen
2And MgF
2Content, sodium aluminum fluoride have played the effect of diluting other composition as solute after the interpolation;
Second step, be to point to add an amount of Cao Da (industrial sodium carbonate) in the ionogen, improve the electrolyzer molecular ratio.
Described electrolyte body with high conduction and high solubility is: higher molecular ratio (2.60-2.65), moderate LiF content (2.5-2.8%), lower CaF
2The lower MgF of content (4.0-5.0%)
2Content (0.7-1.5%), lower alumina concentration (1.0-3.0%).
Claims (1)
1. the aluminium electrolyte system of high conduction and high solubility is characterized in that described method comprises the steps:
The first step, be to point in the ionogen of electrolyzer to add sodium aluminum fluoride, reduce LiF, CaF in the ionogen
2And MgF
2Content, sodium aluminum fluoride have played the effect of diluting other composition as solute after the interpolation;
Second step, be to point to add an amount of Cao Da (industrial sodium carbonate) in the ionogen, improve the electrolyzer molecular ratio;
Described electrolyte body with high conduction and high solubility is: higher molecular ratio (2.60-2.65), moderate LiF content (2.5-2.8%), lower CaF
2The lower MgF of content (4.0-5.0%)
2Content (0.7-1.5%), lower alumina concentration (1.0-3.0%).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191355XA CN102251259A (en) | 2011-07-09 | 2011-07-09 | Aluminum electrolyte system with high conductivity and high solvability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191355XA CN102251259A (en) | 2011-07-09 | 2011-07-09 | Aluminum electrolyte system with high conductivity and high solvability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102251259A true CN102251259A (en) | 2011-11-23 |
Family
ID=44978816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110191355XA Pending CN102251259A (en) | 2011-07-09 | 2011-07-09 | Aluminum electrolyte system with high conductivity and high solvability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102251259A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352237A (en) * | 2013-06-25 | 2013-10-16 | 中国铝业股份有限公司 | Method for establishing alumina density balance under complicated electrolyte system |
| CN103510123A (en) * | 2013-09-10 | 2014-01-15 | 河南中孚实业股份有限公司 | Energy saving method under complicated electrolyte system in aluminum electrolytic tank |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107432A (en) * | 1986-12-11 | 1987-10-28 | 郑州轻金属研究所 | Used for aluminium electrolysis lithium salts-magnesium salts-rare earth compound composite additive and adding technology thereof |
| US20050092619A1 (en) * | 2003-11-05 | 2005-05-05 | Hryn John N. | Process for electrolytic production of aluminum |
| CN101418454A (en) * | 2008-11-19 | 2009-04-29 | 中国铝业股份有限公司 | Aluminum electrolytic method without anode effect |
| CN101709487A (en) * | 2009-12-18 | 2010-05-19 | 中国铝业股份有限公司 | Aluminum electrolytic electrolyte |
-
2011
- 2011-07-09 CN CN201110191355XA patent/CN102251259A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107432A (en) * | 1986-12-11 | 1987-10-28 | 郑州轻金属研究所 | Used for aluminium electrolysis lithium salts-magnesium salts-rare earth compound composite additive and adding technology thereof |
| US20050092619A1 (en) * | 2003-11-05 | 2005-05-05 | Hryn John N. | Process for electrolytic production of aluminum |
| CN101418454A (en) * | 2008-11-19 | 2009-04-29 | 中国铝业股份有限公司 | Aluminum electrolytic method without anode effect |
| CN101709487A (en) * | 2009-12-18 | 2010-05-19 | 中国铝业股份有限公司 | Aluminum electrolytic electrolyte |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352237A (en) * | 2013-06-25 | 2013-10-16 | 中国铝业股份有限公司 | Method for establishing alumina density balance under complicated electrolyte system |
| CN103352237B (en) * | 2013-06-25 | 2016-03-02 | 中国铝业股份有限公司 | The method of alumina density balance is set up under a kind of complicated electrolyte system |
| CN103510123A (en) * | 2013-09-10 | 2014-01-15 | 河南中孚实业股份有限公司 | Energy saving method under complicated electrolyte system in aluminum electrolytic tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2011072546A1 (en) | Electrolyte used in aluminum electrolysis | |
| CN101988210A (en) | Ionic liquid indium chloride/n-butyl pyridine chloride system electroplating solution | |
| CN102517608A (en) | Method for electrodepositing zinc and zinc alloy at low temperature by ionic liquor | |
| KR101046082B1 (en) | Plasma electrolysing oxcidation solution for mg alloys goods | |
| CN103642284A (en) | High-temperature anti-oxidation coating of high-temperature graphite electrode | |
| CN101265588B (en) | Method for low-temperature electrolysis of aluminum oxide for producing aluminum adopting ion liquid | |
| NO20160141A1 (en) | Electrolyte for producing aluminum by molten electrolysis | |
| CN102634817A (en) | Ionic liquid low-temperature aluminum electrolysis method with glassy carbon as inert anode | |
| CN101285198B (en) | Method for electrolyzing aluminum | |
| CN1896329A (en) | Pure fluorine electrolyte for electrolyzing aluminum | |
| EP3075886B1 (en) | Method for producing electrolytic aluminium using potassium cryolite as an additive system | |
| CN102251259A (en) | Aluminum electrolyte system with high conductivity and high solvability | |
| CN101713082B (en) | Low-temperature aluminum electrolysis process and electrolyte | |
| CN103031571A (en) | Method for electrodepositing gallium at low temperature by using ionic liquid | |
| CN101255574A (en) | Potassium salt system electrolyte for aluminium electrolysis | |
| CN102108529A (en) | Method for preparing aluminum-gadolinium-samarium alloy by fused salt electrolysis | |
| CN203284488U (en) | Aluminium alloy anodic oxidation device | |
| CN104746106A (en) | Molten salt electrolysis method for preparing aluminum-scandium intermediate alloy | |
| CN104087984A (en) | Tinning electrolyte of tinned copper wire for electronic component lead wires | |
| CN107779911A (en) | A kind of low-temperature electrolytes | |
| CN106191927A (en) | A kind of low-temperature molten salt system used for aluminium electrolysis and using method thereof | |
| CA2876345C (en) | Electrolyte for aluminum electrolysis and electrolysis process using electrolyte | |
| CN103484897A (en) | Electrolyte for aluminium electrolysis and electrolysis technology using same | |
| CN201354386Y (en) | Aluminum electrolysis bath energy-saving cathode block structure | |
| CN103849898A (en) | Aluminum electrolysis production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111123 |