CN102758219B - Method for forecasting anode effects by isometric voltage drop of anode rods - Google Patents
Method for forecasting anode effects by isometric voltage drop of anode rods Download PDFInfo
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- CN102758219B CN102758219B CN201110109896.3A CN201110109896A CN102758219B CN 102758219 B CN102758219 B CN 102758219B CN 201110109896 A CN201110109896 A CN 201110109896A CN 102758219 B CN102758219 B CN 102758219B
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 230000000694 effects Effects 0.000 title claims abstract description 45
- 230000002159 abnormal effect Effects 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 27
- 238000009499 grossing Methods 0.000 claims description 6
- 238000002203 pretreatment Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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
- C25C3/20—Automatic control or regulation of cells
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to a method for forecasting anode effects by isometric voltage drop of anode rods. The method includes that anode rod isometric voltage drop signal sensors are respectively mounted on different anode rods of a prebaked anode electrolytic cell and used for transmitting acquired anode rod isometric voltage drop signals to a front-end data analyzer; and the front-end data analyzer is used for analyzing anode rod isometric voltage drop data, forecasting anodes about to have the anode effects, and then sending the forecasting results to an electrolytic cell controller. The method has the advantages that conditions of the anode effect of the single anode of the electrolytic cell can be forecasted intensively, abnormal anodes can be monitored effectively, refined operation of the electrolytic cell is realized, running of the electrolytic cell is stabilized, and effects of saving energy, reducing consumption and improving current efficiency are realized.
Description
Technical field
The present invention relates to a kind of method utilizing the equidistant pressure drop anode effect of anode rod, particularly relate to and utilize the equidistant pressure drop data of anode electrolytic cell guide rod to predict the individual anode that prebaked cell for aluminum-reduction is about to occur anode effect.
Background technology
The traditional Prediction of Anode Effect method of electrolyzer carries out analyzing and processing according to the voltage signal of electrolyzer entirety, predicts the situation of anode electrolytic cell effect according to the signal magnitude of integral channel voltage.But in actual production, the generation of anode effect is first often on individual anode, and in recent years along with cell dimension constantly becomes large, the shortcoming of conventional anode effect forecast method constantly comes out.Original by integral channel voltage predict the method for anode effect can only judge whole groove be about to occur anode effect, the concrete region being about to anode effect occurs cannot be determined, the method suppressing the generation of anode effect to adopt also can only be that whole feed opening carries out large blanking simultaneously, this cutting mode can change aluminum oxide concentration in the electrolyte, make it uneven in spatial distribution, increase aluminum oxide consumption.Thisly do not consider the requirement that the conventional anode effect forecast method of concrete anode difference can not adapt to carry out novel electrolytic bath refinement, do not meet yet now society to the target reducing aluminium electrolysis process energy consumption.New energy pinpoint Prediction of Anode Effect method is very important to the technico-economical comparison improving aluminium cell further.
Summary of the invention
A kind of method utilizing the equidistant pressure drop anode effect of anode rod is the invention provides in order to solve the problems of the technologies described above, object accurately to locate the individual anode to being about to occur anode effect, to there is the region of anode effect in positioning instant, to meet requirement electrolyzer being carried out to refinement.
The method of the equidistant pressure drop anode effect of anode rod is utilized for reaching above-mentioned purpose the present invention, comprise the steps: on each anode rod of prebaked-anode type cell, install the equidistant pressure drop signal sensor of anode rod, equidistant for the anode rod collected pressure drop signal is transported to front end data analyzer by anode rod equidistant pressure drop signal sensor; The equidistant pressure drop data of front end data analyzer antianode guide rod carries out analyzing and processing, forecasts the anode being about to anode effect occurs, will predict the outcome and deliver in electrolyzer slot control machine.
The described equidistant pressure drop data of front end data analyzer antianode guide rod is carried out analyzing and processing and is comprised: the pre-treatment of the equidistant pressure drop data of antianode guide rod, low-pass filtering is carried out to the equidistant pressure drop data of anode rod after process, the low-pass filtering data obtained are carried out respectively high frequency pin shake process, slope process and accumulative slope process, the data after high frequency pin shake process, slope process and accumulative slope process are again through anode effect juggling.
The pre-treatment of the described equidistant pressure drop data of antianode guide rod is to each anode rod of electrolyzer, intercepts time span to be
the equidistant pressure drop raw data of anode rod carry out data prediction; Treatment process adopts following smoothing formula to carry out, and realize the abnormal pin in signal to shake removal, formula is as follows:
Wherein
be
smooth value,
for raw data acquisition value, the beginning 2 of data and last 2 difference are only with the first, the second and the four in above-mentioned formula group, and the 5th liang of formula calculates.
Described carry out low-pass filtering to the equidistant pressure drop data of anode rod after process and refer to and adopt Butterworth bilinear filter, frequency filtering upper limit default value is 1/600Hz.
Described high frequency pin shake process of the low-pass filtering data obtained being carried out respectively refers to time span
be divided into 5 equal portions, be calculated as follows each cycle
interior anode rod equidistant pressure drop pin shake intensity, formula is as follows:
;
Then following formula is pressed to the smoothing process of pin shake intensity on each time cycle;
, wherein
; Then in the current predictive cycle
interior pin shake intensity is
; Wherein
,
for the maxima and minima of the equidistant pressure drop of original anode rod in each equipartition time section,
for the equidistant pressure drop of anode rod through low-pass filtering in each equipartition time section.
Described slope process of the low-pass filtering data obtained being carried out respectively refers to that the equidistant pressure drop slope of anode rod is predetermined period
the mean change speed of the equidistant pressure drop of anode rod in the time period after low-pass filtering; Same by time span
be divided into 5 equal portions, then the cycle
the slope calculation formula of the equidistant pressure drop of each anode rod of inner anode is:
。
Described the low-pass filtering data obtained carried out respectively accumulative slope process and refer to and to be calculated by following formula:
。
Data after described high frequency pin shake process, slope process and accumulative slope process refer to slope through anode effect juggling again, accumulative slope and high frequency pin shake and arrange threshold value, significantly increase if anode rod equidistant pressure drop accumulation slope rate continuity some cycles continuous decrease, the equidistant pressure drop of anode rod this cycle slope decline to a great extent or anode rod equidistant pressure drop high frequency pin shakes, then judge to be about to anode effect occurs.
Advantageous effect of the present invention: the present invention can predict targetedly to the anode effect situation of each Sole anode of electrolyzer, to occurring that abnormal anode can effectively be monitored, realize the refinement of electrolyzer, be conducive to stable electrolyzer to run, reach energy-saving and cost-reducing, improve the effect of current efficiency.
Embodiment
The present invention utilizes the method for the equidistant pressure drop anode effect of anode rod, comprise the steps: on each anode rod of prebaked-anode type cell, install the equidistant pressure drop signal sensor of anode rod, equidistant for the anode rod collected pressure drop signal is transported to front end data analyzer by anode rod equidistant pressure drop signal sensor; The equidistant pressure drop data of front end data analyzer antianode guide rod carries out analyzing and processing, forecasts the anode being about to anode effect occurs, will predict the outcome and deliver in electrolyzer slot control machine.
The equidistant pressure drop data of front end data analyzer antianode guide rod is carried out analyzing and processing and is comprised: the pre-treatment of the equidistant pressure drop data of antianode guide rod, low-pass filtering is carried out to the equidistant pressure drop data of anode rod after process, the low-pass filtering data obtained are carried out respectively high frequency pin shake process, slope process and accumulative slope process, the data after high frequency pin shake process, slope process and accumulative slope process are again through anode effect juggling.
The pre-treatment of the equidistant pressure drop data of antianode guide rod is to each anode rod of electrolyzer, intercepts time span to be
the equidistant pressure drop raw data of anode rod carry out data prediction; Treatment process adopts following smoothing formula to carry out, and realize the abnormal pin in signal to shake removal, formula is as follows:
Wherein
be
smooth value,
for raw data acquisition value, the beginning 2 of data and last 2 difference are only with the first, the second and the four in above-mentioned formula group, and the 5th liang of formula calculates.
Carry out low-pass filtering to the equidistant pressure drop data of anode rod after process and refer to employing Butterworth bilinear filter, frequency filtering upper limit default value is 1/600Hz.
The low-pass filtering data obtained are carried out respectively high frequency pin shake process to refer to time span
be divided into 5 equal portions, be calculated as follows each cycle
interior anode rod equidistant pressure drop pin shake intensity, formula is as follows:
;
Then following formula is pressed to the smoothing process of pin shake intensity on each time cycle;
, wherein
; Then in the current predictive cycle
interior pin shake intensity is
; Wherein
,
for the maxima and minima of the equidistant pressure drop of original anode rod in each equipartition time section,
for the equidistant pressure drop of anode rod through low-pass filtering in each equipartition time section.
The low-pass filtering data obtained are carried out respectively slope process and refer to that the equidistant pressure drop slope of anode rod is predetermined period
the mean change speed of the equidistant pressure drop of anode rod in the time period after low-pass filtering; Same by time span
be divided into 5 equal portions, then the cycle
the slope calculation formula of the equidistant pressure drop of each anode rod of inner anode is:
。
Described the low-pass filtering data obtained carried out respectively accumulative slope process and refer to and to be calculated by following formula:
。
Data after described high frequency pin shake process, slope process and accumulative slope process refer to slope through anode effect juggling again, accumulative slope and high frequency pin shake and arrange threshold value, significantly increase if anode rod equidistant pressure drop accumulation slope rate continuity some cycles continuous decrease, the equidistant pressure drop of anode rod this cycle slope decline to a great extent or anode rod equidistant pressure drop high frequency pin shakes, then judge to be about to anode effect occurs.
Claims (7)
1. utilize the method for the equidistant pressure drop anode effect of anode rod, it is characterized in that comprising the steps: on each anode rod of prebaked-anode type cell, install the equidistant pressure drop signal sensor of anode rod, equidistant for the anode rod collected pressure drop signal is transported to front end data analyzer by anode rod equidistant pressure drop signal sensor; The equidistant pressure drop data of front end data analyzer antianode guide rod carries out analyzing and processing, forecasts the anode being about to anode effect occurs, will predict the outcome and deliver in electrolyzer slot control machine; The equidistant pressure drop data of front end data analyzer antianode guide rod is carried out analyzing and processing and is comprised: the pre-treatment of the equidistant pressure drop data of antianode guide rod, low-pass filtering is carried out to the equidistant pressure drop data of anode rod after process, the low-pass filtering data obtained are carried out respectively high frequency pin shake process, slope process and accumulative slope process, the data after high frequency pin shake process, slope process and accumulative slope process are again through anode effect juggling.
2. the method utilizing the equidistant pressure drop anode effect of anode rod according to claim 1, is characterized in that the pre-treatment of the described equidistant pressure drop data of antianode guide rod is to each anode rod of electrolyzer, intercepts time span to be
the equidistant pressure drop raw data of anode rod carry out data prediction; Treatment process adopts following smoothing formula to carry out, and realizes the abnormal pin shake in signal to remove, and formula is as follows:
Wherein
be
smooth value,
for raw data acquisition value, the beginning 2 of data and last 2 difference are only with the first, the second and the four in above-mentioned formula group, and the 5th liang of formula calculates.
3. the method utilizing the equidistant pressure drop anode effect of anode rod according to claim 1, it is characterized in that described carry out low-pass filtering to the equidistant pressure drop data of anode rod after process and referring to and adopt Butterworth bilinear filter, frequency filtering upper limit default value is 1/600Hz.
4. the method utilizing the equidistant pressure drop anode effect of anode rod according to claim 1, is characterized in that described high frequency pin shake process of the low-pass filtering data obtained being carried out respectively refers to time span
be divided into 5 equal portions, be calculated as follows each cycle
interior anode rod equidistant pressure drop pin shake intensity, formula is as follows:
;
Then following formula is pressed to the smoothing process of pin shake intensity on each time cycle;
, wherein
; Then in the current predictive cycle
interior pin shake intensity is
; Wherein
,
for the maxima and minima of the equidistant pressure drop of original anode rod in each equipartition time section,
for the equidistant pressure drop of anode rod through low-pass filtering in each equipartition time section.
5. the method utilizing the equidistant pressure drop anode effect of anode rod according to claim 1, is characterized in that described slope process of the low-pass filtering data obtained being carried out respectively refers to that the equidistant pressure drop slope of anode rod is predetermined period
the mean change speed of the equidistant pressure drop of anode rod in the time period after low-pass filtering; Same by time span
be divided into 5 equal portions, then the cycle
the slope calculation formula of the equidistant pressure drop of each anode rod of inner anode is:
。
6. the method utilizing the equidistant pressure drop anode effect of anode rod according to claim 1, is characterized in that described the low-pass filtering data obtained carried out respectively accumulative slope process and referring to and to be calculated by following formula:
。
7. the method utilizing the equidistant pressure drop anode effect of anode rod according to claim 1, it is characterized in that the data after described high frequency pin shake process, slope process and accumulative slope process refer to slope through anode effect juggling again, accumulative slope and high frequency pin shake and arrange threshold value, if the equidistant pressure drop of anode rod adds up slope rate continuity some cycles continuous decrease, the equidistant pressure drop of anode rod this cycle slope declines to a great extent or the shake of anode rod equidistant pressure drop high frequency pin significantly increases, then judge to be about to anode effect occurs.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110109896.3A CN102758219B (en) | 2011-04-29 | 2011-04-29 | Method for forecasting anode effects by isometric voltage drop of anode rods |
| PCT/CN2012/000553 WO2012146059A1 (en) | 2011-04-29 | 2012-04-25 | Method using anode rod equidistant voltage drop to predict anode effect |
| NO20131581A NO347531B1 (en) | 2011-04-29 | 2012-04-25 | A method for using an anode rod's equidistant voltage drop to predict anode power |
| CA2834292A CA2834292C (en) | 2011-04-29 | 2012-04-25 | A method using anode rod equidistant voltage drop to predict anode effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110109896.3A CN102758219B (en) | 2011-04-29 | 2011-04-29 | Method for forecasting anode effects by isometric voltage drop of anode rods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102758219A CN102758219A (en) | 2012-10-31 |
| CN102758219B true CN102758219B (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110109896.3A Active CN102758219B (en) | 2011-04-29 | 2011-04-29 | Method for forecasting anode effects by isometric voltage drop of anode rods |
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| Country | Link |
|---|---|
| CN (1) | CN102758219B (en) |
| CA (1) | CA2834292C (en) |
| NO (1) | NO347531B1 (en) |
| WO (1) | WO2012146059A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831317B (en) * | 2015-05-07 | 2017-10-13 | 北方工业大学 | Method for judging abnormal anode current of aluminum electrolysis cell |
| GB201602627D0 (en) * | 2016-02-15 | 2016-03-30 | Dubai Aluminium Pjsc And Newsouth Innovations Pty Ltd | Method of monitoring indivual anode currents in an electrolytic cell suitable for the Hall-Heroult electrolysis process |
| CN107220402B (en) * | 2017-04-14 | 2020-11-13 | 桂林理工大学 | Aluminum liquid interface simulation method |
| CN108265315B (en) * | 2018-01-26 | 2020-03-13 | 中南大学 | Method and system for forecasting local anode effect of aluminum electrolysis cell |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967658A (en) * | 2010-11-18 | 2011-02-09 | 北方工业大学 | Aluminum cell anode effect prediction device |
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| RU2303658C1 (en) * | 2005-11-02 | 2007-07-27 | Общество с ограниченной ответственностью "Русская инжиниринговая компания" | Method for controlling technological process in aluminum cell with roasted anodes |
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- 2011-04-29 CN CN201110109896.3A patent/CN102758219B/en active Active
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- 2012-04-25 CA CA2834292A patent/CA2834292C/en active Active
- 2012-04-25 NO NO20131581A patent/NO347531B1/en unknown
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967658A (en) * | 2010-11-18 | 2011-02-09 | 北方工业大学 | Aluminum cell anode effect prediction device |
Non-Patent Citations (2)
| Title |
|---|
| 铝电解槽阳极故障诊断系统研究;李春艳;《北方工业大学硕士学位论文》;20040915;第9-19页 * |
| 铝电解过程阳极效应预测;曾水平;《冶金自动化》;20080925;第32卷(第5期);第7-10页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2834292C (en) | 2016-02-23 |
| NO347531B1 (en) | 2023-12-11 |
| WO2012146059A1 (en) | 2012-11-01 |
| CN102758219A (en) | 2012-10-31 |
| CA2834292A1 (en) | 2012-11-01 |
| NO20131581A1 (en) | 2014-01-22 |
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