CN103114309A - Adaptive control method of electrolytic cell - Google Patents
Adaptive control method of electrolytic cell Download PDFInfo
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- CN103114309A CN103114309A CN2013100586738A CN201310058673A CN103114309A CN 103114309 A CN103114309 A CN 103114309A CN 2013100586738 A CN2013100586738 A CN 2013100586738A CN 201310058673 A CN201310058673 A CN 201310058673A CN 103114309 A CN103114309 A CN 103114309A
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Abstract
The invention provides an adaptive control method of an electrolytic cell and relates to the field of electrolytic aluminium. The method comprises the following steps of: a first step of analyzing the voltage fluctuating value and the working condition of the electrolytic cell in a certain time bucket during the aluminum electrolysis process, and setting the working condition of a cell controller and an interval value of the alumina concentration; a second step of judging the working condition, and recording the variation, the fluctuating range and the mutation of the voltage fluctuating value of the electrolytic cell in the certain time bucket; a third step of computing the alumina concentration in a certain time bucket according to the initial state and the changing speed of the alumina concentration, and controlling the cell controller of the electrolytic cell so that the working condition of the cell controller of the electrolytic cell and the interval value of the alumina concentration are always optimized. The adaptive control method of an electrolytic cell disclosed by the invention is capable of saving energy and reducing consumption of the electrolytic cell.
Description
Technical field
The present invention relates to the electrolytic aluminum field, relate in particular to a kind of electrolyzer self-adaptation control method.
Background technology
Power consumption is the place of energy consumption maximum on electrolytic aluminium production process, along with electric rate is more and more higher, its proportion in the aluminium cost is increasing, therefore, reducing the electrolytic aluminum power consumption is the effective way that each electrolytic aluminium factory of the whole nation reduces aluminium ingot cost, increase economic benefit, is also the state key brainstorm subject.
Be accompanied by complicated electrochemical reaction in aluminium electrolysis process, the matter and energy conversion is complicated, and production environment is extremely abominable, and production process mechanism is unclear, is difficult to set up mathematical model; And production process has nonlinearity, interference is large, uncertainty is strong, but the many on-line monitoring quantity of information of X factor are few, and these have all increased the accurately difficulty of control of production process.For this reason, domestic and international investigator is devoted to research, the development of electrolysis of aluminum automatic control technology always.Shenyang Aluminium Magnesium Design ﹠ Research Inst has researched and developed the aluminium cell dcs based on the BITBUS bussing technique; Guizhou Aluminum Factory and Guiyang Institute of Al-Mg-Design are united the exploitation of having completed the stagnant loop self-adaptive Controlling System of large-scale pre-baked cell, and so-called adaptive control makes electrolyzer work under the state of energy and material balance exactly, and trough is in basicly stable state; The basic thought of adaptive control is according to Al
2O
3Concentration and cell resistance corresponding relation utilize cell resistance " identification " Al
2O
3Then concentration control Al
2O
3Feed rate; Shenyang Aluminium Magnesium Design ﹠ Research Inst and Fushun Aluminium Works's shared coloured main office " eight or five " brainstorm project " intelligent aluminium cell commerical test "; Qinghai Aluminium Plant and Zhongnan Polytechnic Univ's shared " Application and Development of intelligent fuzzy control technique on the 160kA pre-calcining electrolytic cell "; The carrying out of these research work makes China's aluminium electrolytic control technology all approach world level aspect a lot, and the power consumption of electrolytic aluminum has also had larger improvement.
But above research work is all mainly to concentrate in the control of slot control machine.At present, the control of electrolyzer is completed by slot control machine fully, because the control of slot control machine is higher to requirement of real-time, so slot control machine unlikely goes to process a large amount of data.No matter therefore which kind of control algolithm slot control machine adopts, and is all to process and reasoning according to voltage, current data in nearest two hours of gathering basically, extrapolate setting voltage and the reinforced interval time of each groove.In a potroom, the control algolithm that all electrolyzers adopt is just the same, but in fact the state of each electrolyzer is all different, and be only obviously to judge the reason of changes of groove condition and groove condition more accurately according to the data of nearest two hours, therefore, the control algolithm of studying separately slot control machine can't really solve the control problem of electrolyzer.
Summary of the invention
The present invention is intended to solve at least the technical problem that exists in prior art, has proposed to special innovation a kind of electrolyzer self-adaptation control method.
The invention provides a kind of electrolyzer self-adaptation control method, comprise the steps:
Step 1 is analyzed bath voltage undulating quantity and operating mode situation in electrolyzer certain hour section in the electrolytic aluminum process, and slot control machine working condition and alumina concentration interval value are set;
Step 2, judgement operating mode situation in described certain hour section, records the lifting situation of bath voltage undulating quantity, the fluctuating range of bath voltage undulating quantity, the situation of bath voltage undulating quantity sudden change;
Step 3 is calculated alumina concentration in the certain hour section according to the speed of the change in concentration of the original state of alumina concentration and aluminum oxide, controls the electrolyzer slot control machine, makes electrolyzer slot control machine working condition and alumina concentration interval value reach all the time Optimal State.
Its beneficial effect is: for the different states of electrolyzer, the self-adaptation control method of electrolyzer has creatively been proposed, combine the control of upper computer and slot control machine, judgement by upper computer is organically integrated and groove condition, controlling factor that operating mode is relevant in slot control machine, thereby the adaptive expert system control techniques that makes electrolyzer can satisfy the difference of various electrolyzers controls requirement, thereby has realized the energy-saving and cost-reducing of electrolyzer.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of electrolyzer self-adaptation control method, comprise the steps:
Step 1 is analyzed bath voltage undulating quantity and operating mode situation in electrolyzer certain hour section in the electrolytic aluminum process, and slot control machine working condition and alumina concentration interval value are set;
Step 2, judgement operating mode situation in described certain hour section, records the lifting situation of bath voltage undulating quantity, the fluctuating range of bath voltage undulating quantity, the situation of bath voltage undulating quantity sudden change;
Step 3 is calculated alumina concentration in the certain hour section according to the speed of the change in concentration of the original state of alumina concentration and aluminum oxide, controls the electrolyzer slot control machine, makes electrolyzer slot control machine working condition and alumina concentration interval value reach all the time Optimal State.
Described electrolyzer self-adaptation control method, preferred, slot control machine is set in step 1 comprises:
Step 21, the feed rate of control electrolyzer slot control machine according to the slot control machine working condition and the alumina concentration interval value that arrange, is controlled input speed;
Step 22, find out a minimum alumina concentration interval as the initial oxidation aluminum concentration from low alumina concentration, begin velocity of variation and reinforced interval time according to bath voltage from the initial oxidation aluminum concentration, begin to calculate alumina concentration, section is once proofreaied and correct alumina concentration at regular intervals.
Described electrolyzer self-adaptation control method, preferred, described slot control machine working condition and alumina concentration interval value comprise:
The slot control machine working condition
1=health: the basic specified NB*NB coefficient of NB=
1, the NB coefficient
1=0.85, the alumina concentration interval value
1=1.5 ~ 3.5%;
The slot control machine working condition
2=substantially healthy: the basic specified NB*NB coefficient of NB=
2, the NB coefficient
2=0.90, the alumina concentration interval value
2=1.5 ~ (3.5-revises alumina concentration
1) %;
The slot control machine working condition
3=subhealth state: the basic specified NB*NB coefficient of NB=
3, the NB coefficient
3=0.95, the alumina concentration interval value
3=1.5 ~ (3.5-revises alumina concentration
2) %;
The slot control machine working condition
4=critical health: the basic specified NB*NB coefficient of NB=
4, the NB coefficient
4=1.0, the alumina concentration interval value
4=1.5 ~ (3.5-revises alumina concentration
3) %;
The slot control machine working condition
5=slight morbid state: the basic specified NB*NB coefficient of NB=
5, the NB coefficient
5=1.05, the alumina concentration interval value
5=1.5 ~ (3.5-revises alumina concentration
4) %;
The slot control machine working condition
6=moderate morbid state: the basic specified NB*NB coefficient of NB=
6, the NB coefficient
6=1.10, the alumina concentration interval value
6=1.5～(3.5-revises alumina concentration
5) %;
The slot control machine working condition
7=Very Ill-conditioned: the basic specified NB*NB coefficient of NB=
7, the NB coefficient
7=1.15; The alumina concentration interval value
7=1.5 ~ (3.5-revises alumina concentration
6) %;
Wherein, NB is reinforced interval time of basis.
Described electrolyzer self-adaptation control method, preferred, described bath voltage undulating quantity comprises:
Each bath voltage undulating quantity is corresponding with described slot control machine working condition and alumina concentration interval value,
The bath voltage undulating quantity
1=very normal: setting voltage=normal setting voltage-Δ U
1
The bath voltage undulating quantity
2=normal: setting voltage=normal setting voltage-Δ U
2
The bath voltage undulating quantity
3=normal: setting voltage=normal setting voltage-Δ U
3
The bath voltage undulating quantity
4=critical normal: setting voltage=normal setting voltage-Δ U
4
The bath voltage undulating quantity
5=slight deterioration: setting voltage=normal setting voltage+Δ U
5
The bath voltage undulating quantity
6=moderate worsens: setting voltage=normal setting voltage+Δ U
6
The bath voltage undulating quantity
7=severe exacerbation: setting voltage=normal setting voltage+Δ U
7
Wherein, Δ U
1Be the slot control machine working condition
1With the alumina concentration interval value
1Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
2Be the slot control machine working condition
2With the alumina concentration interval value
2Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
3Be the slot control machine working condition
3With the alumina concentration interval value
3Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
4Be the slot control machine working condition
4With the alumina concentration interval value
4Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
5Be the slot control machine working condition
5With the alumina concentration interval value
5Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
6Be the slot control machine working condition
6With the alumina concentration interval value
6Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
7Be the slot control machine working condition
7With the alumina concentration interval value
7Under state, slot control machine is controlled the magnitude of voltage of alumina concentration.
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows: for the different states of electrolyzer, the adaptive expert system control techniques of electrolyzer has creatively been proposed, combine the control of upper computer and slot control machine, judgement by upper computer is organically integrated and groove condition, controlling factor that operating mode is relevant in slot control machine, thereby the adaptive expert system control techniques that makes electrolyzer can satisfy the difference of various electrolyzers controls requirement, thereby has realized the energy-saving and cost-reducing of electrolyzer.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Fig. 1 is electrolyzer self-adaptation control method schema of the present invention.
Embodiment
The below describes embodiments of the invention in detail,
The electrolyzer of different life-spans and different slots condition has different electrolysis abilities, and therefore under different electrolysis abilities, the feed rate of electrolyzer should be different, and can not control according to unified change in concentration process fully; Equally, electrolyzer is in different running statuses, needs different energy and material, and namely the energy of input should be relevant with running status.Therefore, the self-adaptation adjustment that the control of slot control machine need to be carried out control algolithm according to groove condition and the running status of electrolyzer, be that basis that electrolyzer control to be optimized is exactly the accurate judgement of accurate judgement, operation condition to the electrolytic bath condition and the accurate judgement in alumina concentration zone, and on this basis by increase the factor of influence of groove condition, operating mode in control strategy, the running status of electrolyzer is gone guiding towards good direction, extend the time of the good operation of electrolyzer, thereby reduce the energy consumption of electrolyzer.
For this reason, the groove condition of electrolyzer and the concept of electrolyzer operating mode have been introduced in electrolyzer adaptive expert system control techniques.The groove condition of electrolyzer means the index of the electrolysis ability that electrolyzer has, and the groove condition is divided into health, ill, seven kinds of states of Very Ill-conditioned of health, subhealth state, critical health, slight morbid state, moderate substantially.The operating mode of electrolyzer means the index of the matching relationship of the current electrolysis ability that occurs of electrolyzer and input energy, and this index is independent of the groove condition.Operating mode is divided into very normal, normal, normal, critical normal, slight deterioration, moderate worsen, seven kinds of operating modes of severe exacerbation.
No matter adopt which kind of control algolithm, in electrolyzer, the judgement of alumina concentration is the basis of controlling forever, and alumina concentration judgement accurately is the basis of realizing the adaptive expert system control techniques.In electrolyzer, the concentration of aluminum oxide can affect the size of bath voltage, therefore can extrapolate the concentration of aluminum oxide by the size of bath voltage.But because bath voltage is not only relevant with the concentration of aluminum oxide, and relevant with the size of anode pole distance, so the adjustment of pole span all can affect the concentration judgement of aluminum oxide; Simultaneously, constantly adding aluminum oxide in electrolyzer, can constantly affect the change in concentration of aluminum oxide, therefore a velocity of variation according to bath voltage is to judge alumina concentration accurately.For this reason, adopt the method for intelligent inference to judge to alumina concentration in electrolyzer, the rate of accuracy reached of concentration judgement is to more than 95%.
The realization of the adaptive expert system control techniques of electrolyzer be unable to do without the judgement of electrolytic bath condition, operating mode and alumina concentration, adopt data mining technology and intelligent diagnosis technique, the data analysis in each electrolyzer certain hour is inferred the situation of electrolyzer on upper computer.
The groove condition of electrolyzer is analyzed thinking: determine by analyzing cell voltage fluctuation value and the operating mode situation of each electrolyzer in nearest for some time.
The basic thought of operating mode judgement is: in a period of time, and the situation of the lifting situation of whole waveform, the fluctuating range of waveform, waveform sudden change.
The thinking of alumina concentration judgement in electrolyzer: the concentration of aluminum oxide can not suddenlyd change, and therefore can extrapolate the alumina concentration of section any time according to the speed of the change in concentration of the original state of alumina concentration and aluminum oxide.Find out original state of a minimum conduct from low concentration region, begin velocity of variation and reinforced interval time according to bath voltage from original state, begin to calculate the concentration of aluminum oxide.Afterwards concentration is once proofreaied and correct at set intervals.
On the basis that has accurately judged electrolytic bath condition, operating mode, alumina concentration, the concrete methods of realizing of adaptive control technology has been proposed:
The groove condition of electrolyzer will determine the basis size of reinforced interval time (NB), and operating mode will determine the size of setting voltage.Therefore, according to groove condition, operating mode, alumina concentration interval to the settings of slot control machine be:
Groove condition=health: the basic specified NB*NB coefficient of NB=
1, the NB coefficient
1=0.85; Concentration range=1.5 ~ 3.5%;
Groove condition=substantially healthy: the basic specified NB*NB coefficient of NB=
2, the NB coefficient
2=0.90; Concentration range=1.5 ~ (3.5-revises concentration
1) %;
Groove condition=subhealth state: the basic specified NB*NB coefficient of NB=
3, the NB coefficient
3=0.95; Concentration range=1.5 ~ (3.5-revises concentration
2) %;
Groove condition=critical health: the basic specified NB*NB coefficient of NB=
4, the NB coefficient
4=1.0; Concentration range=1.5 ~ (3.5-revises concentration
3) %;
Groove condition=slight morbid state: the basic specified NB*NB coefficient of NB=
5, the NB coefficient
5=1.05; Concentration range=1.5 ~ (3.5-revises concentration
4) %;
Groove condition=moderate morbid state: the basic specified NB*NB coefficient of NB=
6, the NB coefficient
6=1.10; Concentration range=1.5～(3.5-revises concentration
5) %;
Groove condition=Very Ill-conditioned: the basic specified NB*NB coefficient of NB=
7, the NB coefficient
7=1.15; Concentration range=1.5 ~ (3.5-revises concentration
6) %;
Operating mode=very normal: setting voltage=normal setting voltage-Δ U1;
Operating mode=normal: setting voltage=normal setting voltage-Δ U2;
Operating mode=normal: setting voltage=normal setting voltage-Δ U3;
Operating mode=critical normal: setting voltage=normal setting voltage-Δ U4;
Operating mode=slight deterioration: setting voltage=normal setting voltage+Δ U5;
Operating mode=moderate worsens: setting voltage=normal setting voltage+Δ U6;
Operating mode=severe exacerbation: setting voltage=normal setting voltage+Δ U7.
Tn is the n point temperature value of electrolyzer, and its scope is 0C ° ~ 1000C °;
An is the first derivative values of the n point temperature value of electrolyzer, is the changing value of n point temperature in the unit time.Its scope is 0 ~ 1.
(1) the adaptive expert system control techniques of electrolyzer to electrolytic bath condition, operating mode Accuracy of Judgement higher than 95%.
(2) the adaptive expert system control techniques of electrolyzer has reached more than 96% the alumina concentration Accuracy of Judgement.
As shown in Figure 1, the invention provides a kind of electrolyzer self-adaptation control method, comprise the steps:
Step 1 is analyzed bath voltage undulating quantity and operating mode situation in electrolyzer certain hour section in the electrolytic aluminum process, and slot control machine working condition and alumina concentration interval value are set;
Step 2, judgement operating mode situation in described certain hour section, records the lifting situation of bath voltage undulating quantity, the fluctuating range of bath voltage undulating quantity, the situation of bath voltage undulating quantity sudden change;
Step 3 is calculated alumina concentration in the certain hour section according to the speed of the change in concentration of the original state of alumina concentration and aluminum oxide, controls the electrolyzer slot control machine, makes electrolyzer slot control machine working condition and alumina concentration interval value reach all the time Optimal State.
Described electrolyzer self-adaptation control method, preferred, slot control machine is set in step 1 comprises:
Step 21, the feed rate of control electrolyzer slot control machine according to the slot control machine working condition and the alumina concentration interval value that arrange, is controlled input speed;
Step 22, find out a minimum alumina concentration interval as the initial oxidation aluminum concentration from low alumina concentration, begin velocity of variation and reinforced interval time according to bath voltage from the initial oxidation aluminum concentration, begin to calculate alumina concentration, section is once proofreaied and correct alumina concentration at regular intervals.
Described electrolyzer self-adaptation control method, preferred, described slot control machine working condition and alumina concentration interval value comprise:
The slot control machine working condition
1=health: the basic specified NB*NB coefficient of NB=
1, the NB coefficient
1=0.85, the alumina concentration interval value
1=1.5 ~ 3.5%;
The slot control machine working condition
2=substantially healthy: the basic specified NB*NB coefficient of NB=
2, the NB coefficient
2=0.90, the alumina concentration interval value
2=1.5 ~ (3.5-revises alumina concentration
1) %;
The slot control machine working condition
3=subhealth state: the basic specified NB*NB coefficient of NB=
3, the NB coefficient
3=0.95, the alumina concentration interval value
3=1.5 ~ (3.5-revises alumina concentration
2) %;
The slot control machine working condition
4=critical health: the basic specified NB*NB coefficient of NB=
4, the NB coefficient
4=1.0, the alumina concentration interval value
4=1.5 ~ (3.5-revises alumina concentration
3) %;
The slot control machine working condition
5=slight morbid state: the basic specified NB*NB coefficient of NB=
5, the NB coefficient
5=1.05, the alumina concentration interval value
5=1.5 ~ (3.5-revises alumina concentration
4) %;
The slot control machine working condition
6=moderate morbid state: the basic specified NB*NB coefficient of NB=
6, the NB coefficient
6=1.10, the alumina concentration interval value
6=1.5～(3.5-revises alumina concentration
5) %;
The slot control machine working condition
7=Very Ill-conditioned: the basic specified NB*NB coefficient of NB=
7, the NB coefficient
7=1.15; The alumina concentration interval value
7=1.5 ~ (3.5-revises alumina concentration
6) %;
Wherein, NB is reinforced interval time of basis.
Described electrolyzer self-adaptation control method, preferred, described bath voltage undulating quantity comprises:
Each bath voltage undulating quantity is corresponding with described slot control machine working condition and alumina concentration interval value,
The bath voltage undulating quantity
1=very normal: setting voltage=normal setting voltage-Δ U
1
The bath voltage undulating quantity
2=normal: setting voltage=normal setting voltage-Δ U
2
The bath voltage undulating quantity
3=normal: setting voltage=normal setting voltage-Δ U
3
The bath voltage undulating quantity
4=critical normal: setting voltage=normal setting voltage-Δ U
4
The bath voltage undulating quantity
5=slight deterioration: setting voltage=normal setting voltage+Δ U
5
The bath voltage undulating quantity
6=moderate worsens: setting voltage=normal setting voltage+Δ U
6
The bath voltage undulating quantity
7=severe exacerbation: setting voltage=normal setting voltage+Δ U
7
Wherein, Δ U
1Be the slot control machine working condition
1With the alumina concentration interval value
1Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
2Be the slot control machine working condition
2With the alumina concentration interval value
2Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
3Be the slot control machine working condition
3With the alumina concentration interval value
3Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
4Be the slot control machine working condition
4With the alumina concentration interval value
4Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
5Be the slot control machine working condition
5With the alumina concentration interval value
5Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
6Be the slot control machine working condition
6With the alumina concentration interval value
6Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
7Be the slot control machine working condition
7With the alumina concentration interval value
7Under state, slot control machine is controlled the magnitude of voltage of alumina concentration.
The invention has the beneficial effects as follows: for the different states of electrolyzer, the adaptive expert system control techniques of electrolyzer has creatively been proposed, combine the control of upper computer and slot control machine, judgement by upper computer is organically integrated and groove condition, controlling factor that operating mode is relevant in slot control machine, thereby the adaptive expert system control techniques that makes electrolyzer can satisfy the difference of various electrolyzers controls requirement, thereby has realized the energy-saving and cost-reducing of electrolyzer.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present invention and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (4)
1. an electrolyzer self-adaptation control method, is characterized in that, comprises the steps:
Step 1 is analyzed bath voltage undulating quantity and operating mode situation in electrolyzer certain hour section in the electrolytic aluminum process, and slot control machine working condition and alumina concentration interval value are set;
Step 2, judgement operating mode situation in described certain hour section, records the lifting situation of bath voltage undulating quantity, the fluctuating range of bath voltage undulating quantity, the situation of bath voltage undulating quantity sudden change;
Step 3 is calculated alumina concentration in the certain hour section according to the speed of the change in concentration of the original state of alumina concentration and aluminum oxide, controls the electrolyzer slot control machine, makes electrolyzer slot control machine working condition and alumina concentration interval value reach all the time Optimal State.
2. electrolyzer self-adaptation control method according to claim 1, is characterized in that, slot control machine is set in step 1 comprises:
Step 21, the feed rate of control electrolyzer slot control machine according to the slot control machine working condition and the alumina concentration interval value that arrange, is controlled input speed;
Step 22, find out a minimum alumina concentration interval as the initial oxidation aluminum concentration from low alumina concentration, begin velocity of variation and reinforced interval time according to bath voltage from the initial oxidation aluminum concentration, begin to calculate alumina concentration, section is once proofreaied and correct alumina concentration at regular intervals.
3. according to claim 1-2 described electrolyzer self-adaptation control methods of any one, is characterized in that, described slot control machine working condition and alumina concentration interval value comprise:
The slot control machine working condition
1=health: the basic specified NB*NB coefficient of NB=
1, the NB coefficient
1=0.85, the alumina concentration interval value
1=1.5 ~ 3.5%;
The slot control machine working condition
2=substantially healthy: the basic specified NB*NB coefficient of NB=
2, the NB coefficient
2=0.90, the alumina concentration interval value
2=1.5 ~ (3.5-revises alumina concentration
1) %;
The slot control machine working condition
3=subhealth state: the basic specified NB*NB coefficient of NB=
3, the NB coefficient
3=0.95, the alumina concentration interval value
3=1.5 ~ (3.5-revises alumina concentration
2) %;
The slot control machine working condition
4=critical health: the basic specified NB*NB coefficient of NB=
4, the NB coefficient
4=1.0, the alumina concentration interval value
4=1.5 ~ (3.5-revises alumina concentration
3) %;
The slot control machine working condition
5=slight morbid state: the basic specified NB*NB coefficient of NB=
5, the NB coefficient
5=1.05, the alumina concentration interval value
5=1.5 ~ (3.5-revises alumina concentration
4) %;
The slot control machine working condition
6=moderate morbid state: the basic specified NB*NB coefficient of NB=
6, the NB coefficient
6=1.10, the alumina concentration interval value
6=1.5～(3.5-revises alumina concentration
5) %;
The slot control machine working condition
7=Very Ill-conditioned: the basic specified NB*NB coefficient of NB=
7, the NB coefficient
7=1.15; The alumina concentration interval value
7=1.5 ~ (3.5-revises alumina concentration
6) %;
Wherein, NB is reinforced interval time of basis.
4. electrolyzer self-adaptation control method according to claim 3, is characterized in that, described bath voltage undulating quantity comprises:
Each bath voltage undulating quantity is corresponding with described slot control machine working condition and alumina concentration interval value,
The bath voltage undulating quantity
1=very normal: setting voltage=normal setting voltage-Δ U
1
The bath voltage undulating quantity
2=normal: setting voltage=normal setting voltage-Δ U
2
The bath voltage undulating quantity
3=normal: setting voltage=normal setting voltage-Δ U
3
The bath voltage undulating quantity
4=critical normal: setting voltage=normal setting voltage-Δ U
4
The bath voltage undulating quantity
5=slight deterioration: setting voltage=normal setting voltage+Δ U
5
The bath voltage undulating quantity
6=moderate worsens: setting voltage=normal setting voltage+Δ U
6
The bath voltage undulating quantity
7=severe exacerbation: setting voltage=normal setting voltage+Δ U
7
Wherein, Δ U
1Be the slot control machine working condition
1With the alumina concentration interval value
1Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
2Be the slot control machine working condition
2With the alumina concentration interval value
2Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
3Be the slot control machine working condition
3With the alumina concentration interval value
3Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
4Be the slot control machine working condition
4With the alumina concentration interval value
4Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
5Be the slot control machine working condition
5With the alumina concentration interval value
5Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
6Be the slot control machine working condition
6With the alumina concentration interval value
6Under state, slot control machine is controlled the magnitude of voltage of alumina concentration; Δ U
7Be the slot control machine working condition
7With the alumina concentration interval value
7Under state, slot control machine is controlled the magnitude of voltage of alumina concentration.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984832A (en) * | 2014-05-28 | 2014-08-13 | 中南大学 | Simulation analysis method for electric field of aluminum electrolysis cell |
| CN105951127A (en) * | 2016-06-24 | 2016-09-21 | 重庆大学 | Aluminum oxide concentration control method based on aluminum electrolytic cell |
| CN108959847A (en) * | 2018-07-20 | 2018-12-07 | 东北大学 | A method of monitoring alumina dissolution rate is calculated by calorimetry |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108959847A (en) * | 2018-07-20 | 2018-12-07 | 东北大学 | A method of monitoring alumina dissolution rate is calculated by calorimetry |
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