CN1570216A - Aluminum electrolytic tank calcining method - Google Patents
Aluminum electrolytic tank calcining method Download PDFInfo
- Publication number
- CN1570216A CN1570216A CN 200410037935 CN200410037935A CN1570216A CN 1570216 A CN1570216 A CN 1570216A CN 200410037935 CN200410037935 CN 200410037935 CN 200410037935 A CN200410037935 A CN 200410037935A CN 1570216 A CN1570216 A CN 1570216A
- Authority
- CN
- China
- Prior art keywords
- voltage
- roasting
- aluminium
- electrolytic tank
- tank
- 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.)
- Granted
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000001354 calcination Methods 0.000 title claims description 6
- 239000004411 aluminium Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 10
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 229910001610 cryolite Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000005868 electrolysis reaction Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000005245 sintering Methods 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Abstract
An aluminum electrolytic tank baking method relates to the technology method for electrolytic preparation of the metal aluminum with alumina as raw material, especially a novel electrolytic tank current-carrying baking method in the process of electrolytic preparation. The preparing process comprises: pouring the molten liquid aluminium into the novel electrolytic tank, covering the liquid aluminum with the cryolite, and current-carrying baking until the voltage is down to 1.5-2.0V from 3V naturally, characterized by : when the tank voltage is less than 2.0V, employing the gradually lifting anode method for improving the voltage, keeping the voltage of 2.0-2.1V, improving the voltage to 3V again at the 24 hours before starting, and finishing the electrolytic tank baking when the temperature reaches 850-900 DEG C.
Description
Technical field
A kind of method of roasting of aluminium cell, relating to a kind of aluminium oxide that adopts is the process of raw material electrolysis production metallic aluminium, particularly the electrical roasting method of the new electrolytic cell in the electrolysis production process.
Background technology
New electrolytic cell electrical roasting is an important step in the aluminium cell production process. Electrolytic cell must be through the roasting stage before entering normal production. The purpose of calcination is: (1) oven dry cell lining and burner hearth; (2) sintered cathode bottom land charcoal seam (side seam, the centre joint and latasuture) makes it to form a complete burner hearth that can satisfy the electrolysis production needs; (3) slowly add thermal bake-out negative electrode charcoal piece, bottom temperature is heated to more than 850～900 ℃, near normal electrolysis temperature.
Whether the quality of calcination will directly affect electrobath start smooth, and whether the startup later stage can carry out safety, efficient, stable production, and has influence on economic and technical norms. If the bad in the future early damage of electrolytic cell that also can cause of roasting is greatly affected bath life.
At present, roasting process be in new electrolytic cell, pour into the liquid aluminium of fusing, after aluminium liquid covers ice crystal, roasting is carried out in energising. Behind the electrolytic cell input dc power, produce high temperature by negative electrode liner resistance heating, formula of its input heat is: W=UIt, wherein U-represents tank voltage, I-current strength, t-conduction time. Hence one can see that, and the heat of electrolytic cell input was directly proportional with tank voltage, current strength and conduction time, and when current strength was constant, tank voltage was higher, and conduction time is longer, and the heat of trough input is just more, and the temperature of negative electrode burner hearth aluminium water roasting is also just higher. Usually in roasting process, because tank voltage is along with falling under the electrolytic cell electrical resistance, voltage also is tending towards automatic downward trend, general energising groove roasting on same day voltage is about 3V, second day drops to 2.0～2.5V, and voltage can be reduced to 1.5V in the 3rd day, caused roasting efficient low. Prolongation along with roasting time, electrolyzer temperature begins to raise gradually, the aluminium coolant-temperature gage can only reach 400 ℃～700 ℃ before starting, cause furnace bottom colder, aluminium water usually can not all melt in the groove, all around or the part also solidifying aluminium, cause electrolytic cell to start and lift the anode difficulty when filling with electrolyte, the anode bottom in the aluminium adhesion of solidifying, sometimes anode is lifted and is broken away from and tank voltage is not high, occurs a kind of " illusion " easily generation anode effect and voltage swing when continuing to lift voltage, and start the later stage electrolytic cell and easily bring out the anode effect of not going out, give to produce with tissue and cause many troubles and passive.
The content of invention
Purpose of the present invention is exactly the deficiency that exists in the calcination process for above-mentioned prior art, provide a kind of and can effectively improve sintering temperature, furnace bottom charcoal piece, burner hearth and aluminium coolant-temperature gage are reached more than 850～900 ℃, near normal electrolysis temperature, make electrobath start smooth, time saving and energy saving power saving is produced stable normal in the future, current efficiency is high, the method for roasting of a kind of aluminium cell that breakage rate is low.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of roasting of aluminium cell, be included in the liquid aluminium that pours into fusing in the new electrolytic cell, after aluminium liquid covers ice crystal, it is natural in being down to 1.5～2.0V about 3V to bath voltage that roasting is carried out in energising, it is characterized in that being down to 2.0V when following when tank voltage, begin to adopt and promote gradually the method that anode improves voltage, keep voltage at 2.0～2.1V, begin gradually again to improve voltage to 3V 24 hours early stages to starting, when the aluminium coolant-temperature gage reaches 850～900 ℃ or finish the calcination task when above.
Method of the present invention promotes the anode amplitude at every turn, be limited to prevent from effect or segment anode to break away from. Avoid do not lift voltage early stage, the later stage tosses voltage when starting soon, causes the trough voltage instability, anode effect occurs, sharply expands with heat and contract with cold etc.
Method of the present invention is easy and simple to handle, and operation is rationally reliable, and sintering temperature improves significantly, and is respond well. Sintering temperature can be brought up to more than 850～900 ℃ from about 400～700 ℃ of past, near normal electrolysis production temperature, reach entry condition, make electrobath start obviously smooth, avoid anode effect and the effect of not going out, fill with in advance aluminium and fall voltage, time saving and energy saving power saving, and save to start and use electrolyte. In addition, also help the electrobath start final-period management, can be efficiently after being conducive to that electrolytic cell is normal and producing, safety, stable production, be conducive to electrolytic cell minimizing early damage. Reduced all kinds of accidents and occured, effect is remarkable.
The specific embodiment
A kind of method of roasting of aluminium cell is included in the liquid aluminium that pours into fusing in the new electrolytic cell, covers ice crystal at aluminium liquid. In roasting process, tank voltage is tending towards automatic downward trend, generally switches on groove roasting on same day voltage about 3, and second day drops to 2.0～2.5V, drops to 1.5～2.0V on the 3rd day. Be down to 2.0V when tank voltage and begin to take to promote anode when following and raise voltage method, make tank voltage remain on the 3 day time between 2.0～2.1V, continue again in 24 hours early stages to promote to starting, but the highlyest can not surpass 3V. During whole roasting, the roasting tank voltage can not be lower than 2.0 volts. Final aluminium coolant-temperature gage can reach 850 ℃～more than 900 ℃, near 920～950 ℃ of normal electrolysis production temperature; Enter normal electrolysis start-up operation.
The invention will be further described below in conjunction with instantiation.
Embodiment
Adopt method roasting electrolytic cell of the present invention and conventional method of roasting process and the results are shown in subordinate list.
Subordinate list
| Method of roasting | Method of the present invention | The prior art method | Remarks | ||||
| Roasting time | Order of classes or grades at school | Average voltage | Per day voltage | Order of classes or grades at school | Average voltage | Per day voltage | Electrolysis worker every day, four boats changed, per tour work 6 hours. |
| Roasting same day | 3.337 | 3.071 | |||||
| Two classes | Electrical roasting | ||||||
| Class Three | Electrical roasting | Class Three | 3.399 | ||||
| Fourth Shift | 3.337 | Fourth Shift | 2.742 | ||||
| The roasting second day | 0 point | 2.634 | 2.209 | 0 point | 2.295 | 2.086 | |
| Two classes | 2.205 | Two classes | 2.099 | ||||
| Class Three | 2.011 | Class Three | 1.987 | ||||
| Fourth Shift | 1.986 | Fourth Shift | 1.961 | ||||
| Roasting the 3rd day | 0 point | 1.894 | 2.012 | 0 point | 1.848 | 1.762 | |
| Two classes | 2.030 | Two classes | 1.777 | ||||
| Class Three | 2.051 | Class Three | 1.734 | ||||
| Fourth Shift | 2.075 | Fourth Shift | 1.688 | ||||
| Roasting the 4th day | 0 point | 2.079 | 2.081 | 0 point | 1.673 | 1.629 | |
| Two classes | 2.085 | Two classes | 1.584 | ||||
| Class Three | 2.052 | Class Three | Start | ||||
| Fourth Shift | 2.109 | ||||||
| Roasting the 5th day | 0 point | 2.114 | 2.225 | ||||
| Two classes | 2.127 | ||||||
| Class Three | 2.206 | ||||||
| Fourth Shift | 2.279 | ||||||
| Start the same day | 0 point | 2.289 | 2.380 | ||||
| Two classes | 2.471 | ||||||
| Class Three | Start | ||||||
| Roasting round the clock | 5 days | 3 days | |||||
| Open front voltage | 2.78V | 1.53V | |||||
| Sintering temperature | Middle 930 ℃ of groove, 918 ℃ all around | Middle 670 ℃ of groove, 550 ℃ all around | |||||
Claims (1)
1. the method for roasting of an aluminium cell, be included in the liquid aluminium that pours into fusing in the new electrolytic cell, after aluminium liquid covers ice crystal, it is natural in being down to 1.5～2.0V about 3V to bath voltage that roasting is carried out in energising, it is characterized in that voltage is down to 2.0V when following, begin to adopt and promote gradually anode and voltage is improved keep voltage at 2.0～2.1V, begin again to continue booster tension to 3V 24 hours early stages to starting, finish calcination when the aluminium coolant-temperature gage reaches 850～900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100379353A CN1308492C (en) | 2004-05-14 | 2004-05-14 | Aluminum electrolytic tank calcining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100379353A CN1308492C (en) | 2004-05-14 | 2004-05-14 | Aluminum electrolytic tank calcining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570216A true CN1570216A (en) | 2005-01-26 |
| CN1308492C CN1308492C (en) | 2007-04-04 |
Family
ID=34481781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100379353A Expired - Fee Related CN1308492C (en) | 2004-05-14 | 2004-05-14 | Aluminum electrolytic tank calcining method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1308492C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353805B (en) * | 2008-09-01 | 2010-06-09 | 重庆天泰铝业有限公司 | Aluminum cell flame-aluminum solution two-stage calcination method |
| CN101270481B (en) * | 2007-03-22 | 2011-04-13 | 山西华圣铝业有限公司 | Reignition method for base aluminum groove |
| CN102041523B (en) * | 2009-10-21 | 2012-10-03 | 中国铝业股份有限公司 | Aluminum electrolysis special-shaped cathode electrolytic bath grooved anode structure and roasting method thereof |
| CN105239096A (en) * | 2015-11-04 | 2016-01-13 | 云南云铝泽鑫铝业有限公司 | Seamless-connection baking starting method for large prebaked aluminum electrolysis cell |
| CN110592617A (en) * | 2019-08-29 | 2019-12-20 | 青海物产工业投资有限公司 | Secondary starting method for full-series power failure of aluminum electrolysis cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995058B (en) * | 2012-12-06 | 2015-06-17 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1578231A1 (en) * | 1987-11-16 | 1990-07-15 | Ленинградский электротехнический институт им.В.И.Ульянова (Ленина) | Method of starting aluminium electrolyzer |
| SU1767037A1 (en) * | 1990-12-17 | 1992-10-07 | Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции | Method for thermal preparation of aluminium electrolyzer to the start |
| CN1028118C (en) * | 1991-05-31 | 1995-04-05 | 云南铝厂 | Roasting method for self-roasting tank for aluminium electrolysis |
| RU2092619C1 (en) * | 1994-06-20 | 1997-10-10 | Акционерное общество открытого типа "Братский алюминиевый завод" | Method of burning aluminium electrolyzer |
| CN1085745C (en) * | 1999-09-24 | 2002-05-29 | 平果铝业公司 | Coke grain roast starting method for aluminium electrolyzer with pre-roasted anode |
-
2004
- 2004-05-14 CN CNB2004100379353A patent/CN1308492C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270481B (en) * | 2007-03-22 | 2011-04-13 | 山西华圣铝业有限公司 | Reignition method for base aluminum groove |
| CN101353805B (en) * | 2008-09-01 | 2010-06-09 | 重庆天泰铝业有限公司 | Aluminum cell flame-aluminum solution two-stage calcination method |
| CN102041523B (en) * | 2009-10-21 | 2012-10-03 | 中国铝业股份有限公司 | Aluminum electrolysis special-shaped cathode electrolytic bath grooved anode structure and roasting method thereof |
| CN105239096A (en) * | 2015-11-04 | 2016-01-13 | 云南云铝泽鑫铝业有限公司 | Seamless-connection baking starting method for large prebaked aluminum electrolysis cell |
| CN110592617A (en) * | 2019-08-29 | 2019-12-20 | 青海物产工业投资有限公司 | Secondary starting method for full-series power failure of aluminum electrolysis cell |
| CN110592617B (en) * | 2019-08-29 | 2021-06-15 | 青海物产工业投资有限公司 | Secondary starting method for full-series power failure of aluminum electrolysis cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1308492C (en) | 2007-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102234819B (en) | Preheating starting method for aluminium electrolysis cell | |
| CN101260542B (en) | Low polar distance energy-saving production method for aluminum electrolysis bath | |
| CN104402204B (en) | A kind of silica crucible mould | |
| CN1308492C (en) | Aluminum electrolytic tank calcining method | |
| CN101187040B (en) | Method for stabilizing aluminum cell hearth | |
| CN205635806U (en) | Aluminium - carbon - aluminium cathode aluminium cell | |
| CN101440503A (en) | Novel aluminum cell structure | |
| CN106894052A (en) | A kind of conjuncted multilevel aluminum electrolysis unit and its application method for preparing rafifinal | |
| CN107218800B (en) | A kind of direct current electric arc furnace | |
| CN105714332A (en) | Method for electrodepositing vanadium through fused salt | |
| CN1066201C (en) | DC arc electric slag heating ladle furnace and control method thereof | |
| CN209537593U (en) | A kind of device being automatically drained out for magnesium slag in magnesium refining production | |
| CN102260886A (en) | Method for starting electrolytic tank with low voltage | |
| CN103088366B (en) | The energy-efficient hot-fluid coke grain calcination startup method of a kind of electrolysis of aluminum | |
| CN105420548A (en) | Lead-calcium alloy production method | |
| CN100491598C (en) | Starting method of aluminum electrolytic bath | |
| CN205152357U (en) | Cold aluminium cell negative pole structure of smashing paste is wholly makeed firm by ramming in area | |
| CN105780053A (en) | Aluminum electrolysis method with aluminum as cathode | |
| CN206666650U (en) | Produce the mixing electrolysis system of tough cathode | |
| CN220005963U (en) | Zinc scooping spoon for rectifying zinc casting silicon carbide | |
| CN201296786Y (en) | Coke grain baking starting structure for pre-baked-anode cell aluminum-reduction cell | |
| CN109112574A (en) | A kind of offline subsequent process of the prebaked anode of aluminium cell | |
| CN100491599C (en) | Online middle repairing method for electrolytic bath side part inner lining | |
| CN101962786B (en) | Control method for blowing-free heat dissipating window after starting large aluminum electrolysis cell | |
| CN1332069C (en) | Method for producing refined aluminum by cryolite-alumina fused salt electrolysis process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20150514 |
|
| EXPY | Termination of patent right or utility model |