CN100532652C - Preparation method of aluminum electrobath for transitting to electrolysis in low temperature - Google Patents
Preparation method of aluminum electrobath for transitting to electrolysis in low temperature Download PDFInfo
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- CN100532652C CN100532652C CNB2006100209597A CN200610020959A CN100532652C CN 100532652 C CN100532652 C CN 100532652C CN B2006100209597 A CNB2006100209597 A CN B2006100209597A CN 200610020959 A CN200610020959 A CN 200610020959A CN 100532652 C CN100532652 C CN 100532652C
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- aluminum
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 51
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title 1
- 239000003792 electrolyte Substances 0.000 claims abstract description 19
- 239000004411 aluminium Substances 0.000 claims description 38
- 238000004519 manufacturing process Methods 0.000 claims description 22
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 14
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims description 10
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000004615 ingredient Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 2
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims description 2
- 239000002362 mulch Substances 0.000 claims description 2
- 230000008439 repair process Effects 0.000 claims description 2
- -1 sodium aluminum fluoride Chemical compound 0.000 claims description 2
- 235000013024 sodium fluoride Nutrition 0.000 claims description 2
- 239000011775 sodium fluoride Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000002425 crystallisation Methods 0.000 abstract 2
- 230000008025 crystallization Effects 0.000 abstract 2
- 230000005611 electricity Effects 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
This invention relates to a low-temperature electrolysis method electrolyzing aluminum in an aluminum electrolytic tank. The method comprises: (1) adjusting the electrolyte composition to lower the initial crystallization temperature; (2) controlling the voltage of the electrolytic tank; (3) controlling overheat of the electrolysis; (4) controlling the aluminum level; (5) controlling the intelligent fuzzy parameters; (6) finely operating. The method can improve the electrolytic conditions of the electrolytic tank, lower the initial crystallization temperature of 905-915 deg.C and the electrolysis temperature to 915-930 deg.C, raise the current efficiency, and reduce the electricity consumption.
Description
Technical field
The present invention relates to a kind of Aluminium Electrolysis technology, specifically relate to the production method of a kind of aluminium cell to the low-temperature electrolytic transition.
Background technology
Generally between 950 ℃～970 ℃, electrolyte molecule is than between 2.5～2.7 for the electrolysis temperature of China's electrolyzer, and the current efficiency of electrolyzer is about 92%, and the primary aluminum unit dc consumption is higher.The existing higher electrolysis of aluminum of electrolysis temperature has following deficiency: 1. the higher relatively electrolytic cell currents efficient that makes of electrolysis temperature reduces, and unit dc consumption is higher; 2. the material volatilization loss of electrolyzer is bigger, and electrolysis production material unit consumption is too high; 3. electrolysis temperature is higher, and material volatilization loss is bigger, influences cell room workman's Working environment, brings harm to the electrolysis workman is healthy.In today of aluminium industry competition fierceness, save energy reduces the wastage, and improves current efficiency and seems particularly important.At present, the technology that adopts low temperature to carry out electrolysis of aluminum is controlled at 915 ℃～930 ℃ with electrolysis temperature, the Shang Weijian record.
Summary of the invention
The problem to be solved in the present invention is at the deficiencies in the prior art, and a kind of production method that improves the aluminium cell of electrolytic cell currents efficient, reduction unit dc consumption, minimizing material volatilization loss to the low-temperature electrolytic transition is provided.
Aluminium cell of the present invention is achieved by following technical proposals to the production method of low-temperature electrolytic transition: production method of the present invention may further comprise the steps:
A) adjust electrolyte ingredient and reduce the liquidus temperature step; B) electrolyzer setting voltage controlled step; C) the overheated controlled step of electrolysis; D) the horizontal controlled step of aluminium; E) intelligent fuzzy parameter controlled step; F) accurate operation step.
Aluminium cell of the present invention compared with prior art has following beneficial effect to the production method of low-temperature electrolytic transition: because the present invention adopts the adjustment electrolyte ingredient to reduce liquidus temperature is that main method has been improved the electrolyzer working condition, make the electrolyzer liquidus temperature be in low scope (905 ℃～915 ℃) all the time, making electrolysis production is to carry out work under 915 ℃～930 ℃ at electrolysis temperature, improve the current efficiency of electrolyzer, reduced power consumption; Improving the aluminium level can make the heat in the electrolyzer comparatively fast distribute, thereby play the effect of regulating electrolysis temperature, simultaneously, higher aluminium level can also weaken the interaction force of level and vertical magnetic field, make aluminium liquid keep stable, higher aluminium level can reduce the volatilization loss of material simultaneously, reduces the electrolysis production cost; The application of intelligent fuzzy control technique of the present invention has improved the advance of Aluminum Electrolysis Production; Reduce the volatilization of material, the also corresponding work Working environment that has improved the workman.The present invention is applicable to the transition of aluminium cell to the low temperature electrolysis production, also can be applicable to the transformation of other industry electrolyzer to temperature production.
Embodiment
Below in conjunction with embodiment the production method technical scheme of aluminium cell of the present invention to the transition of low temperature electrolysis production is further described.
Embodiment 1.
Aluminium cell of the present invention may further comprise the steps to the production method of low-temperature electrolytic transition:
A) adjust electrolyte ingredient and reduce the liquidus temperature step molecular ratio, CaF
2, MgF
2, LiF is controlled at respectively and makes the electrolyzer liquidus temperature be in the scope of reduction in 2.2～2.35,3～6%, 1～4%, 1.6～2.0% scopes, liquidus temperature is 905 ℃～915 ℃; Described molecular ratio is meant the mol ratio of Sodium Fluoride and aluminum fluoride, described adjustment electrolyte ingredient reduction liquidus temperature is meant by concentrated phase conveying system and adds aluminum fluoride to electrolyzer, interpolation Calcium Fluoride (Fluorspan), magnesium fluoride are controlled, the aluminum fluoride addition is that 13kg/ criticizes, adjust the addition of aluminum fluoride according to the size of molecular ratio, general aluminum fluoride adds and batch is 0-8 batches/days.
B) electrolyzer setting voltage controlled step is used for the groove setting voltage is controlled at below the 4.10V; Described electrolyzer setting voltage control is meant by the computer intelligence fuzzy control, according to the relation between molecular ratio and the setting voltage, it is the every reduction by 0.1 of molecular ratio, the groove setting voltage 0.04-0.05V that raises approximately, setting voltage parameter to the computer installation upper computer is adjusted, and is transferred to the control that slot control machine carries out setting voltage.
C) control the aluminium level by adjusting the electrolyzer aluminum yield, when the aluminium level is too high, suitably increase aluminum yield, the aluminium level is crossed when hanging down, and suitably reduces aluminum yield, keeps the aluminium level height between 20cm～23cm by adjusting aluminium liquid extraction amount; By adjusting aluminium level and setting voltage, the electrolyzer superheating temperature can be controlled at about 15 ℃;
D) intelligent fuzzy parameter controlled step is used for setting blanking interval, effect latent period, the amount of owing cycle time, excessive cycle time, anode traveling time and blanking initialization time, and alumina concentration is controlled in 1.5%～3.5% narrower scope;
E) the accurate operation step is used for ensureing that by employee's operational quality and Intelligent Fuzzy Control electrolyzer efficiently moves with lesser temps.
Described Intelligent Fuzzy Control system is meant the intelligent fuzzy expert control system.
Described accurate operation method is meant
A) first moon of aluminium level is controlled at 16～18cm; First moon of electrolyte level is not less than 25cm; New fluting molecular ratio is not less than to be not less than in 2.8, the second months and was not less than 2.3 in 2.5, the three months; New fluting first month added about 60 tons of fresh aluminum oxide, begins to add about 60 tons of fluorinated alumina in second month; But must not add aluminum fluoride;
B) when carrying out the anode exchanging operation, handle the bearth precipitation thing, big face adds man-hour overhead traveling crane crust breaking end apart from foundary weight 10cm;
C) interpolation of anode insulation material blocks anode seam and the new extremely steel pawl of inboard with the material piece of granularity≤5cm earlier, buries 2/3rds of steel pawl with the aluminum oxide lining then, and foundary weight is reserved 10cm;
D) regular constant volume device to the crust breaking blanking system keeps in repair;
F) in time salvage the breeze that suspends in the electrolyte solution;
G) by on-the-spot sodium aluminum fluoride or the electrolyte block of adding, electrolyte level is controlled at 20～23cm, ionogen flux amount is increased, reduce the precipitation of alumina probability;
H) thickness of increase anode, big face mulch increases to 3 present～5cm by 2 original～3cm;
I) to ionogen aluminum liquid horizontal, molecular ratio, adjust according to the height of groove temperature, when electrolysis temperature is higher than 930 ℃, suitably reduce molecular ratio, improve the aluminium level, reduce electrolyte level; When electrolysis temperature is lower than 915 ℃, suitably improves molecular ratio, reduce the aluminium level, improve electrolyte level.
Claims (6)
1, a kind of aluminium cell is characterized in that to the production method of low-temperature electrolytic transition this production method may further comprise the steps:
A) adjust electrolyte ingredient and reduce the liquidus temperature step electrolyte molecule ratio, CaF
2, MgF
2, LiF is controlled at respectively and makes the electrolyzer liquidus temperature be in the scope of reduction in 2.2～2.35,3～6%, 1～4%, 1.6～2.0% scopes, liquidus temperature is 905 ℃～915 ℃;
B) electrolyzer setting voltage controlled step is used for the groove setting voltage is controlled at below the 4.10V;
C) the overheated controlled step of electrolysis is used for the electrolyzer superheating temperature is controlled at about 15 ℃;
D) the horizontal controlled step of aluminium is used for electrolyzer aluminium level is controlled between 20～23cm;
E) intelligent fuzzy parameter controlled step is used for setting blanking interval, effect latent period, the amount of owing cycle time, excessive cycle time, anode traveling time and blanking initialization time, and alumina concentration is controlled in 1.5%～3.5% narrower scope;
F) the accurate operation step is used for ensureing that by employee's operational quality and Intelligent Fuzzy Control electrolyzer efficiently moves with lesser temps.
2, aluminium cell according to claim 1 is to the production method of low-temperature electrolytic transition, it is characterized in that described adjustment electrolyte ingredient reduces the liquidus temperature step and is meant by concentrated phase conveying system and adds aluminum fluoride to electrolyzer, interpolation Calcium Fluoride (Fluorspan), magnesium fluoride are controlled, the aluminum fluoride addition is that 13kg/ criticizes, and aluminum fluoride adds and batch to be 0-8 batches/days.
3, aluminium cell according to claim 1 is to the production method of low-temperature electrolytic transition, it is characterized in that described electrolyzer setting voltage controlled step is meant controls the setting voltage of electrolyzer by the computer intelligence fuzzy control by the upper computer parameter adjustment.
4, aluminium cell according to claim 1 is characterized in that to the production method of low-temperature electrolytic transition the horizontal controlled step of described aluminium is meant by adjusting aluminium liquid extraction amount maintenance aluminium level height between 20cm～23cm.
5, aluminium cell according to claim 1 is to the production method of low-temperature electrolytic transition, it is characterized in that described intelligent fuzzy parameter controlled step is meant by the intelligent fuzzy expert control system alumina concentration is controlled in 1.5%～3.5% narrower scope.
6, aluminium cell according to claim 1 is characterized in that to the production method of low-temperature electrolytic transition described accurate operation step is meant
A) first moon of aluminium level is controlled at 16～18cm; First moon of electrolyte level is not less than 25cm; The mol ratio that new fluting molecular ratio is Sodium Fluoride and aluminum fluoride is not less than to be not less than in 2.8, the second months and was not less than 2.3 in 2.5, the three months; New fluting first month added fresh aluminum oxide, begins to add fluorinated alumina in second month;
B) when carrying out the anode exchanging operation, handle the bearth precipitation thing, big face adds man-hour overhead traveling crane crust breaking end apart from foundary weight 10cm;
C) interpolation of anode insulation material blocks anode seam and the new extremely steel pawl of inboard with the material piece of granularity≤10cm earlier, buries 2/3rds of steel pawl with the aluminum oxide lining then, and foundary weight is reserved 10cm;
D) regular constant volume device to the crust breaking blanking system keeps in repair;
F) in time salvage the breeze that suspends in the aluminum solutions;
G) by on-the-spot sodium aluminum fluoride or the electrolyte block of adding, electrolyte level is controlled at 20～23cm, ionogen flux amount is increased, reduce the precipitation of alumina probability;
H) thickness of increase anode, big face mulch increases to 3 present～5cm by 2 original～3cm;
I) to ionogen aluminum liquid horizontal, molecular ratio, adjust according to the height of groove temperature, when electrolysis temperature is higher than 930 ℃, suitably reduce molecular ratio, improve the aluminium level, reduce electrolyte level; When electrolysis temperature is lower than 915 ℃, suitably improves molecular ratio, reduce the aluminium level, improve electrolyte level.
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|---|---|---|---|
| CNB2006100209597A CN100532652C (en) | 2006-04-28 | 2006-04-28 | Preparation method of aluminum electrobath for transitting to electrolysis in low temperature |
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| CNB2006100209597A CN100532652C (en) | 2006-04-28 | 2006-04-28 | Preparation method of aluminum electrobath for transitting to electrolysis in low temperature |
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| CN100532652C true CN100532652C (en) | 2009-08-26 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265598B (en) * | 2007-03-12 | 2010-08-04 | 中国铝业股份有限公司 | Aluminum electrolysis cell controlling machine voltage swing control method and control system |
| CN101187040B (en) * | 2007-09-13 | 2010-06-09 | 中国铝业股份有限公司 | Method for stabilizing aluminum cell hearth |
| 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 |
| CN101270485B (en) * | 2008-05-10 | 2010-06-16 | 中国铝业股份有限公司 | Control method for electroanalysis of degree of superheat |
| CN101857963A (en) * | 2010-06-13 | 2010-10-13 | 中国铝业股份有限公司 | Method for improving unit output capacity of aluminum electrolytic cell |
| CN101935851B (en) * | 2010-09-30 | 2012-03-28 | 中南大学 | Current strengthening and efficient energy saving method of prebaked aluminium electrolysis cell |
| CN102051639B (en) * | 2011-01-30 | 2014-06-04 | 中国铝业股份有限公司 | Method for eliminating crust breaking chip bulge of aluminum cell |
| CN103184475B (en) * | 2011-12-31 | 2016-09-28 | 晟通科技集团有限公司 | A kind of control method of the regular burner hearth of aluminium cell |
| CN103397347A (en) * | 2013-06-25 | 2013-11-20 | 中国铝业股份有限公司 | Method for controlling electrolytic tank voltage deviation |
| CN104928718B (en) * | 2014-03-17 | 2017-09-29 | 晟通科技集团有限公司 | Electrolytic cell production technology |
| CN104120456B (en) * | 2014-07-31 | 2016-06-22 | 湖南创元铝业有限公司 | Aluminium electroloysis fuzzy control method |
| 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 |
| CN109023423B (en) * | 2018-07-17 | 2020-04-07 | 甘肃东兴铝业有限公司 | Method for producing high-quality Al99.90 product by using 500kA aluminum electrolytic cell |
| CN109338409B (en) * | 2018-12-07 | 2020-05-01 | 东北大学 | Automatic cleaning method for bottom sediment of aluminum electrolysis cell |
| CN113502508A (en) * | 2021-08-10 | 2021-10-15 | 内蒙古霍煤鸿骏铝电有限责任公司 | Control method for efficient production of aluminum electrolysis cell |
| CN115110120B (en) * | 2022-06-22 | 2024-01-23 | 中国铝业股份有限公司 | Method for reducing emission of perfluorocarbon in aluminum electrolysis |
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