CN109594103A - Aluminum cell anode effect method for early warning - Google Patents
Aluminum cell anode effect method for early warning Download PDFInfo
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- CN109594103A CN109594103A CN201910126598.1A CN201910126598A CN109594103A CN 109594103 A CN109594103 A CN 109594103A CN 201910126598 A CN201910126598 A CN 201910126598A CN 109594103 A CN109594103 A CN 109594103A
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- China
- Prior art keywords
- early warning
- anode effect
- displacement
- cover plate
- tank cover
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/20—Automatic control or regulation of cells
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to a kind of aluminum cell anode effect method for early warning, including electrolytic cell, electrolytic cell includes groove body, and fastening on groove body has tank cover plate, passes through tank cover plate and is equipped with anode rod；Anode rod is located at the intracorporal one end jointed anode carbon block of slot, and the other end is connected with crossbeam bus；Tank cover plate is equipped with displacement sensor, displacement sensor is connect so that the displacement signal of tank cover plate in electrolytic process is passed to early warning controller with early warning controller signal, early warning controller judges whether to occur anode effect, early warning controller connection alarm device and slot control machine according to displacement signal to export corresponding instruction signal to alarm device and slot control machine when determining is that anode effect will occur.The present invention by detection tank cover plate displacement information can indirectly concentration and prediction of anode effect generation, and in advance forecast, handle, forecast judge it is simple and reliable, timeliness is good, to inhibit the processing of anode effect to strive for the more time, to reduce the generation of anode effect, lower consumption emission reduction.
Description
Technical field
The invention belongs to chemical metallurgy technical fields, and in particular to a kind of aluminum cell anode effect method for early warning.
Background technique
Large-scale aluminum electrolytic cell is mostly used automatic control system and carries out production management, and the object in aluminium cell is controlled in production process
Expect that concentration is very crucial, the slot control machine in automatic control system is by the indirect judgement to concentration of aluminum oxide in aluminum cell and divides
Analysis, can formulate reasonable blanking velocity, to reach the control to the material concentration in slot.By by slot internal oxidition aluminum concentration control
System can obtain higher current efficiency and stability in a lower range.But lower alumina concentration is often
The problem of bringing anode effect to take place frequently, because after alumina concentration reduces, the worsened wettability of electrolyte and anodic gas, anode
Gas is difficult to be attached on the bottom of anode block from being discharged in electrolyte, when air accumulation is excessive, can cause tank voltage
Sharply increase the big ups and downs with slot stability, i.e. generation anode effect.The generation of anode effect disappears along with a large amount of energy
Consumption, and the PFC class gas of pollution can be discharged, reducing or eliminating anode effect is problem to be solved.
Processing is carried out again after generation anode effect and belongs to post-processing, and more common solution is by advance at present
The mode of early warning inhibits the generation of anode effect to be handled in time before anode effect occurs.Existing aluminium cell
The method of Prediction of Anode Effect by acquiring the tank voltage of aluminium cell, and parses to judge CONCENTRATION STATE tank voltage,
Concentration information is then combined to provide the forecast result of anode effect when voltage occurs quickly soaring；Also just like CN101967658A institute
It is disclosed that relative error is distributed by calculating current and is compared with given threshold, to provide Prediction of Anode Effect result.
But since the tank voltage parsing for alumina concentration needs to carry out tank voltage data the filtering of long period, thus it is pre-
Report is difficult to provide in the enough time before anode effect occurs, and fails to inhibit anode effect to strive for enough places
The time is managed, causing the inhibition to anode effect to handle, the often time is insufficient, and anode effect still relatively mostly occurs.
Summary of the invention
For the above-mentioned deficiency of the prior art, the technical problem to be solved in the present invention is to provide a kind of aluminium cell anode effects
Method for early warning is answered, avoids the problem that early warning to anode effect not in time, obtains and the anode effect that may occur is shifted to an earlier date
Forecast reduces the generation of anode effect to inhibit the processing of anode effect to strive for the effect of more time, reduces energy consumption and pollution
The discharge of object.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
Aluminum cell anode effect method for early warning, including electrolytic cell, the electrolytic cell include groove body, and fastening on the groove body has slot
Cover board passes through the tank cover plate and is equipped with anode rod；Anode rod is located at the intracorporal one end jointed anode carbon block of slot, the other end with
Crossbeam bus is connected to be used for into electricity；The tank cover plate is equipped with displacement sensor, institute's displacement sensors and early warning controller
Signal is connected so that the displacement signal of tank cover plate in electrolytic process is passed to early warning controller, and early warning controller is according to displacement signal
Judge whether that anode effect, the early warning controller connection alarm device and slot control machine will occur to determine occur
Corresponding instruction signal is exported to alarm device and slot control machine when anode effect.
Above-mentioned technical proposal is further improved, institute's displacement sensors are fixedly connected on the top of tank cover plate.
Further, the early warning controller to received displacement signal carry out displacement characteristic extraction, then with preset into
Decision threshold compares to be judged.
Preferably, the displacement characteristic is the absolute displacement amount of tank cover plate, is then sentenced when absolute displacement amount reaches decision threshold
It is fixed that anode effect will occur.
Preferably, the displacement characteristic is the acceleration of tank cover plate, then determines i.e. will when acceleration reaches decision threshold
Anode effect occurs.
Preferably, the displacement characteristic is the shift spectrum of tank cover plate, and decision threshold is spectrum signature, when shift spectrum is close
Spectrum signature then determines that anode effect will occur.
Further, it is 5 seconds or more that the early warning controller, which extracts the period judged to received displacement signal, is sentenced
It is fixed when will occur anode effect to alarm device and slot control machine output corresponding instruction signal, on the contrary it is then into next period.
Further, the early warning controller includes judgment module, the judgment module connection power module, communication mould
Block, clock module, memory module and A/D conversion module, the A/D conversion module connection displacement solution analyse module, the displacement
Sensor is connected with the displacement parsing module, and the alarm device and slot control machine are connected with the communication module；It is described
With the decision threshold in judgment module.
Compared with prior art, the invention has the following beneficial effects:
1, the present invention can obtain the motion state of crust upper gas by the displacement information of detection tank cover plate with indirect analytic, from
And indirectly concentration and prediction of anode effect generation, to may occur anode effect forecast in advance, forecast judge it is simple and reliable, and
When property is good, to inhibit the processing of anode effect to strive for the more time, to reduce the generation of anode effect, reduces energy consumption and pollution
The discharge of object.
2, displacement sensor installation of the present invention is relatively more flexible, and overall cost is cheap；Forecast result is reliable, it is possible to reduce
The workload of manual patrol.
3, the present invention can be quickly obtained effect state, and can carry out rapid feedback to alarm device and control system, can
Concentration control instruction is modified or is compensated early.
4, the present invention can remind manually intervenes early, reduces the fluctuation of material concentration in slot, inhibits anode effect ahead of time
Generation.
Detailed description of the invention
The structural schematic diagram of Fig. 1-specific embodiment aluminum cell anode effect method for early warning；
Wherein, crossbeam bus 1, anode rod 2, anode block 3, displacement sensor 4, early warning controller 5, slot control machine 6, alarm dress
Set 7, tank cover plate 8, crust 9, groove body 10.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
The aluminum cell anode effect method for early warning of specific embodiment, by monitoring 8 displacement information of tank cover plate on-line, to institute
The displacement information of acquisition carries out online analyzing with indirect acquisition 9 upper gas motion states of crust, thus will to aluminium cell
The anode effect that may occur is forecast.Referring to Fig. 1, including electrolytic cell, the electrolytic cell includes groove body 10, the groove body 10
Upper fastening has tank cover plate 8, is a schematical side structure in figure, the other side is mirror image forms；Sun is equipped with across the tank cover plate 8
Pole guide rod 2；Anode rod 2 is located at one end jointed anode carbon block 3 in groove body 10, and the other end is connected with crossbeam bus 1 to be used for
Into electricity；The tank cover plate 8 is equipped with displacement sensor 4, and institute's displacement sensors 4 are connect with will be electric with 5 signal of early warning controller
The displacement signal of tank cover plate 8 passes to early warning controller 5 in solution preocess, and is judged by early warning controller 5 according to displacement signal
Whether anode effect will be occurred, and the early warning controller 5 connects alarm device 7 and slot control machine 6(or slot control machine manipulation system
System) to export corresponding instruction signal to alarm device 7 and slot control machine 6 when will anode effect be occurred by determining.
For aluminium cell before anode effect will occur within about 300s, non-homogeneous shape is presented in the discharge of anodic gas
State, anodic gas is with 9 upper space of crust in waveform cycle emissions to slot, anodic gas meeting when overflowing from upper space
The improper displacement of tank cover plate 8 is caused, which there is specific frequency spectrum and absolute displacement amplitude range (can pass through anode effect
Front and back actual measurement occurs to obtain), the displacement information by detecting tank cover plate 8 can obtain the fortune of 9 upper gas of crust with indirect analytic
Dynamic state, so that the generation of concentration and prediction of anode effect indirectly, forecasts the anode effect that may occur in advance；Displacement sensor
Application and very mature to the mode of displacement signal sampling analysis judgment, forecast judge simple and reliable, and timeliness is good, to inhibit positive
The more time is striven in the processing of polar effect, to reduce the generation of anode effect, reduces the discharge of energy consumption and pollutant.
The early warning controller 5 to received displacement signal carry out displacement characteristic extraction, then with preset into decision threshold
It compares to be judged, the possibility occurrence of concentration and prediction of anode effect；Early warning controller 5 carries out received displacement signal
Extracting the period judged is five seconds or more, is corresponded to when determining occur anode effect to alarm device 7 and the output of slot control machine 6
Command signal, it is on the contrary then do not export corresponding instruction signal to alarm device 7 and slot control machine 6 and enter next extraction and judge the period.
The displacement characteristic is absolute displacement amount, acceleration or/and the shift spectrum of tank cover plate 8, and decision threshold is corresponding to it setting.
Specifically, the early warning controller 5 includes judgment module, judgment module connection power module, communication module,
Clock module, memory module and A/D conversion module, the A/D conversion module connection displacement solution analyse module, the displacement sensing
Device 4 is connected with the displacement parsing module, and the alarm device 7 and slot control machine 6 are connected with the communication module；It is described to sentence
With the decision threshold in disconnected module.Displacement parsing module receives 8 displacement signal of tank cover plate that displacement sensor 4 transmits and deposits
It stores up, the period judged in the present embodiment displacement signal extraction is 300 seconds, the displacement of 4 real-time detection tank cover plate 8 of displacement sensor
Situation, and the displacement signal that will test passes to displacement parsing module, displacement parsing module solves received displacement signal
Analysis is passed to judgment module after A/D conversion module is converted to digital quantity and extracts displacement characteristic, with preset into decision threshold into
Row comparison is to judge whether that anode effect will occur.Wherein, displacement characteristic can be the absolute displacement amount of tank cover plate 8, when
Then determine that anode effect will occur when absolute displacement amount reaches the displacement magnitude of decision threshold；Displacement characteristic is also possible to slot
The acceleration of cover board 8 then determines that anode effect will occur when acceleration reaches the acceleration upper limit value of decision threshold；Position
The shift spectrum that feature is also possible to tank cover plate 8 is moved, decision threshold is spectrum signature, when shift spectrum fast approaching decision threshold
Spectrum signature then determines that anode effect will occur；Displacement characteristic can also integrate the absolute displacement amount of tank cover plate 8, acceleration and
Any two or three in shift spectrum, analysis judgment, reaches forecast condition one by one, then determines that anode effect will occur
It answers.Early warning controller 5 determine after will anode effect occurring, and be issued pair by communication module to alarm device 7 and slot control machine 6
The command signal answered, alarm device 7 carry out Caution And Warning according to command signal, and alarm device 7 can be LED panel indicator light
Or/and the modes such as voice broadcast service, slot control machine 6 can correspond to adjusting blanking velocity according to command signal, thus the object in control flume
Expect concentration, inhibit the generation of anode effect, certainly, the processing of anode effect is inhibited to be not limited to the blanking velocity tune of slot control machine control
Section, can be combined with artificial mode, is in time inserted into wooden stick using traditional manual type according to the prompting of alarm device 7
Electrolyte squeezes away the aggregation gas-bearing formation on 3 bottom of anode block, or handles by the way of manually shaking etc..
Wherein, institute's displacement sensors 4 are preferably fixedly connected on the top of tank cover plate 8, the displacement signal of acquisition more in time,
Accurately.
Letter between displacement sensor 4 and early warning controller 5, between early warning controller 5 and alarm device 7 and slot control machine 6
Number transmitting can be wire transmission, be also possible to the mode of wireless transmission.Button when implementation, corresponding to tank cover plate 8 and groove body 10
Connection structure is closed, actual measurement can be corresponded to and obtain the displacement characteristic of tank cover plate 8 before and after anode effect occurs, and be correspondingly arranged early warning control
The displacement parsing module and decision threshold of device 5 processed are so as to subsequent on-line monitoring.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (8)
1. aluminum cell anode effect method for early warning, including electrolytic cell, the electrolytic cell includes groove body (10), the groove body (10)
Upper fastening has tank cover plate (8), passes through the tank cover plate (8) and is equipped with anode rod (2)；Anode rod (2) is located in groove body (10)
One end jointed anode carbon block (3), the other end is connected for into electricity with crossbeam bus (1)；It is characterized by: the tank cover plate
(8) displacement sensor (4) are equipped with, institute's displacement sensors (4) are connect with will be in electrolytic process with early warning controller (5) signal
The displacement signal of tank cover plate (8) passes to early warning controller (5) and is judged whether by early warning controller (5) according to displacement signal
Anode effect, early warning controller (5) connection alarm device (7) and slot control machine (6) will occur to determine send out
Corresponding instruction signal is exported to alarm device (7) and slot control machine (6) when green anode effect.
2. aluminum cell anode effect method for early warning according to claim 1, it is characterised in that: institute's displacement sensors (4)
It is fixedly connected on the top of tank cover plate (8).
3. aluminum cell anode effect method for early warning according to claim 1, it is characterised in that: the early warning controller (5)
Displacement characteristic extraction carried out to received displacement signal, then with preset into decision threshold compare to being judged.
4. aluminum cell anode effect method for early warning according to claim 3, it is characterised in that: the displacement characteristic is slot cover
The absolute displacement amount of plate (8) when absolute displacement amount reaches decision threshold then determines that anode effect will occur.
5. aluminum cell anode effect method for early warning according to claim 3, it is characterised in that: the displacement characteristic is slot cover
The acceleration of plate (8) when acceleration reaches decision threshold then determines that anode effect will occur.
6. aluminum cell anode effect method for early warning according to claim 3, it is characterised in that: the displacement characteristic is slot cover
The shift spectrum of plate (8), decision threshold are spectrum signature, when shift spectrum then determines that anode effect will occur close to spectrum signature
It answers.
7. aluminum cell anode effect method for early warning according to claim 3, it is characterised in that: the early warning controller (5)
It is 5 seconds or more that the period judged is extracted to received displacement signal, determines occur to fill when anode effect to alarm
Set (7) and slot control machine (6) output corresponding instruction signal, on the contrary it is then into next period.
8. according to any one of the claim 3-7 aluminum cell anode effect method for early warning, it is characterised in that: the early warning control
Device (5) processed includes judgment module, the judgment module connection power module, communication module, clock module, memory module and A/
D conversion module, the A/D conversion module connection displacement solution analyse module, institute's displacement sensors (4) and the displacement parsing module
It is connected, the alarm device (7) and slot control machine (6) are connected with the communication module；With described in the judgment module
Decision threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126598.1A CN109594103B (en) | 2019-02-20 | 2019-02-20 | Aluminum electrolysis cell anode effect early warning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126598.1A CN109594103B (en) | 2019-02-20 | 2019-02-20 | Aluminum electrolysis cell anode effect early warning method |
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| Publication Number | Publication Date |
|---|---|
| CN109594103A true CN109594103A (en) | 2019-04-09 |
| CN109594103B CN109594103B (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910126598.1A Expired - Fee Related CN109594103B (en) | 2019-02-20 | 2019-02-20 | Aluminum electrolysis cell anode effect early warning method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763958A (en) * | 2020-08-24 | 2020-10-13 | 沈阳铝镁设计研究院有限公司 | Anode effect detection method based on anode guide rod vibration |
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|---|---|---|---|---|
| US4302302A (en) * | 1980-05-09 | 1981-11-24 | Mitsubishi Light Metal Ind., Ltd. | Method of feeding alumina to an aluminium electrolytic cell and apparatus therefor |
| US4563255A (en) * | 1983-02-10 | 1986-01-07 | Swiss Aluminum Ltd. | Process and device for controlling a crust breaking facility |
| WO2008077016A1 (en) * | 2006-12-19 | 2008-06-26 | Michael Schneller | Aluminum production process control |
| CN101787549A (en) * | 2010-03-30 | 2010-07-28 | 云南铝业股份有限公司 | Method for improving inoxidizability of anode of high aluminum electrolysis slot |
| CN101967658A (en) * | 2010-11-18 | 2011-02-09 | 北方工业大学 | Aluminum cell anode effect prediction device |
| CN102808199A (en) * | 2012-07-27 | 2012-12-05 | 中国铝业股份有限公司 | Method for early warning and inhibiting on-line anode effect of aluminum electrolysis cell |
-
2019
- 2019-02-20 CN CN201910126598.1A patent/CN109594103B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4302302A (en) * | 1980-05-09 | 1981-11-24 | Mitsubishi Light Metal Ind., Ltd. | Method of feeding alumina to an aluminium electrolytic cell and apparatus therefor |
| US4563255A (en) * | 1983-02-10 | 1986-01-07 | Swiss Aluminum Ltd. | Process and device for controlling a crust breaking facility |
| WO2008077016A1 (en) * | 2006-12-19 | 2008-06-26 | Michael Schneller | Aluminum production process control |
| CN101787549A (en) * | 2010-03-30 | 2010-07-28 | 云南铝业股份有限公司 | Method for improving inoxidizability of anode of high aluminum electrolysis slot |
| CN101967658A (en) * | 2010-11-18 | 2011-02-09 | 北方工业大学 | Aluminum cell anode effect prediction device |
| CN101967658B (en) * | 2010-11-18 | 2012-08-15 | 北方工业大学 | Aluminum cell anode effect prediction device |
| CN102808199A (en) * | 2012-07-27 | 2012-12-05 | 中国铝业股份有限公司 | Method for early warning and inhibiting on-line anode effect of aluminum electrolysis cell |
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| Title |
|---|
| 伍洪泽: ""大型铝电解槽槽壳位移研究"", 《中国有色金属学报》 * |
| 刘飞岐，: ""基于信号特征分析的阳极效应检测与预报研究"", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅰ》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763958A (en) * | 2020-08-24 | 2020-10-13 | 沈阳铝镁设计研究院有限公司 | Anode effect detection method based on anode guide rod vibration |
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