CN104164682A - Aluminum cell computer energy balance control method - Google Patents
Aluminum cell computer energy balance control method Download PDFInfo
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- CN104164682A CN104164682A CN201410460219.XA CN201410460219A CN104164682A CN 104164682 A CN104164682 A CN 104164682A CN 201410460219 A CN201410460219 A CN 201410460219A CN 104164682 A CN104164682 A CN 104164682A
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Abstract
The invention relates to an aluminum cell computer energy balance control method, belonging to the technical field of electrolysis. The aluminum cell computer energy balance control method comprises the following steps: setting precise electrolyte temperature control target value by using real-time on-line monitoring data of electrolyte temperature by the computer to form the temperature control center point, and adjusting variable technological parameters in time on the premise of keeping the aluminum cell quantitative technological parameters unchanged to control the electrolyte temperature within the range of +/-5 DEG C, thereby achieving the goal of aluminum cell energy control. The aluminum electrolysis computer energy control technique implements aluminum electrolysis production energy balance control on the basis of material balance using resistance as the control mode, enhances the stability of the electrolysis bath and obviously enhances the economic and technical indexes. Meanwhile, the method obviously enhances the automation level, implements on-line measurement of aluminum electrolyte temperature instead of the artificial intermittent measurement mode, and greatly lowers the labor intensity.
Description
Technical field
The invention belongs to electrolysis tech field, relate to a kind of aluminium cell control method, particularly a kind of aluminium cell computer energy equilibrium control method.
Background technology
Aluminium electrolyte temperature is one of most important technical parameter in Aluminum Electrolysis Production process, and all technical parameters, economic target and operation all have direct or indirect relation with aluminium electrolyte temperature.Therefore, modern large-scale pre-baked aluminum electrolysis cell has been determined centered by electrolysis temperature (superheating temperature) is controlled, the technology controlling and process theory of other technical data of rational Match.On-line measurement by aluminium electrolytic temperature in time, is accurately grasped aluminium electrolyte temperature and variation tendency thereof and adjusts targetedly, guarantees electrolyzer energy balance, realizes that aluminium cell is efficient, smooth running, reduces labour intensity.Yet domestic and international all aluminium cell Computer Control Technologies are all according to aluminium cell resistance and Al at present
2o
3" U " curved line relation, realize right Al
2o
3the on-line Control of concentration, but cannot the energy balance of aluminium cell be controlled and be regulated.Therefore, be necessary the prior art electrolysis of aluminum economic and technical norms that improved.
Summary of the invention
For overcoming prior art above shortcomings, improve electrolysis of aluminum computer control method, on the basis of realizing aluminium cell material balance, realize the control to energetic balance of aluminum cell, the invention provides a kind of electrolysis of aluminum computer energy equilibrium control method.
The technical solution used in the present invention is as follows:
The present invention by following technical proposal complete a kind of electrolysis of aluminum computer energy equilibrium control method be utilize computer to the data of the real time on-line monitoring of electrolyte temperature as feedback, set accurate electrolyte temperature and control target value, formation is point centered by temperature is controlled, on the constant basis of the quantitative processing parameter of aluminium cell, adjust in real time variable processing parameter, electrolyte temperature is controlled to positive and negative 5 ℃ of scopes, arrives the object that aluminium cell energy is controlled.
Described quantitative processing parameter is to comprise setting voltage and alumina concentration.Setting voltage is that electrolyzer practical situation are set, and computer cannot be realized automatic change.Alumina concentration is aluminium cell resistance and Al
2o
3" excessive " and " amount of owing " of " U " curved line relation control, alumina blanking amount computer cannot be realized automatic change.
Described variable processing parameter comprises that aluminium cell voltage control, aluminium cell aluminum fluoride add control and aluminium cell aluminum yield controlling composition.
(1) bath voltage control is to set electrolyte temperature target value T according to the separate unit aluminium cell condition of production
targetwith superheating temperature target value Sh
targetafter, utilization take utility model patent number as: the ionogen temperature measuring equipment of ZL201220065837.0 carries out on-line monitoring to electrolyte temperature, resulting on-line monitoring temperature data is feedback information, computer calculates electrolyte temperature and electrolyte superheat degree automatically, and the data that aftertreatment obtains through one-period calculate the weighted mean T of electrolyte temperature and electrolyte superheat degree
corrand Sh
corr.
Described T
corr< T
targetneed to improve setting voltage.
0 ℃ of described < T
corr-T
target15 ℃ of needs of < reduce setting voltage.
15 ℃ of described < T
corr-T
targethand inspection electrolyzer situation, and return to setting voltage.
(2) aluminium cell aluminum fluoride interpolation control is the electrolyte primary crystal temperature objectives value T setting by separate unit electrolyzer
llqtargetby on-line monitoring, obtain the feeding quantity that data that after electrolyte primary crystal temperature, aftertreatment obtains through one-period calculate electrolyzer aluminum fluoride, by the automatic aluminum fluoride feeding quantity of electrolyzer device, carrying out aluminum fluoride interpolation, electrolyte primary crystal temperature is controlled in a stable interval, is T
corrand Sh
corrbasic guarantee is provided.
The automatic aluminum fluoride feeding quantity of described electrolyzer device is existing installation.
Described aluminum fluoride addition is to be determined by the difference between ionogen actual measurement liquidus temperature and electrolyte primary crystal temperature objectives value.
Described electrolyte primary crystal temperature objectives value is that the best electrolyte ingredient under electrolysis of aluminum optimum process technology condition determines electrolyte primary crystal temperature, for ionogen being surveyed to the liquidus temperature that liquidus temperature is adjusted to optimum process technology system, need to make ionogen actual measurement liquidus temperature all the time in target liquidus temperature span of control by adjusting, control aluminum fluoride input amount.
(3) control of aluminium cell aluminum yield is to set aluminium horizontal target value Al according to separate unit electrolyzer practical situation
target, by measuring aluminium horizontal target value, the data that aftertreatment obtains through one-period are calculated aluminum yield and are gone out aluminium operation.
Described electrolyzer aluminum yield is determined by current efficiency in principle, but be subject to superheating temperature and influence of magnetic field, under the definite prerequisite of electric tank working voltage, electrolyte ingredient, can pass through measured current efficiency and the impact on electrolyzer of electrolyte superheat degree and on-the-spot electrolyzer magnetic field, determine aluminum yield, by the adjustment of aluminum yield, guarantee that aluminium cell is all the time in best criticality efficient, low consumption.
compared with prior art, its beneficial effect is in the present invention:
(1) electrolysis of aluminum computer energy control techniques has realized Aluminium Electrolysis energy balance on the material balance basis that resistance is master mode and has controlled take, and electrolyzer stability strengthens, and every economic and technical norms significantly improve;
(2) automatization level significantly improves, and the on-line measurement that realizes aluminium electrolyte temperature substitutes artificial discontinuity metering system, significantly reduces labour intensity;
(3) aluminium cell operations is enrolled to computer-controlled program to the impact of electrolysis production, realize expert intelligence fuzzy control.
Accompanying drawing explanation
Fig. 1 is aluminium cell computer energy equilibrium control method model schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The present embodiment utilize computer to the data of the real time on-line monitoring of electrolyte temperature as feedback, according to the separate unit aluminium cell condition of production, set electrolyte temperature target value T
targetbe 940 ℃ and superheating temperature target value Sh
targetafter being 15 ℃, utilize utility model patent number to be: the ionogen temperature measuring equipment of ZL201220065837.0 carries out on-line monitoring to electrolyte temperature, monitoring interval time is 8 hours, measuring for the first time electrolyte temperature is 939 ℃, the electrolyte temperature again measuring after 8 hours is 935 ℃, this computer-chronograph automatic discrimination electrolyte temperature raises, T
corr-T
targe=935 ℃-940 ℃=-5 ℃, controlled at T
corr< T
targetin scope, computer automatically raises setting voltage and reduces 10mV., set on the basis of aluminum fluoride discharge quantity 20kg at this aluminium cell, Computer is calculated Bath Temperature rising T meanwhile
corr-T
targe=-5 ℃, the automatic aluminum fluoride feeding device of electrolyzer stops carrying out aluminum fluoride interpolation.After being 8 hours interval time, again measuring electrolyte temperature is 941 ℃, and electrolyte temperature is controlled at the positive and negative 5 ℃ of scopes of design temperature.3 all after dates of temperature survey arrange aluminium cell aluminum yield, according to separate unit electrolyzer practical situation, set aluminium horizontal target value Al
targetfor 25cm, the aluminium level value measuring through all after dates of 3 temperature surveys is 27cm, if electrolyte temperature is at 0 ℃ of < T this moment
corr-T
target15 ℃ of scopes of <, aluminum yield is got by set(ting)value.
Embodiment 2
The present embodiment utilize computer to the data of the real time on-line monitoring of electrolyte temperature as feedback, according to the separate unit aluminium cell condition of production, set electrolyte temperature target value T
targetbe 940 ℃ and superheating temperature target value Sh
targetafter being 15 ℃, utilize utility model patent number to be: the ionogen temperature measuring equipment of ZL201220065837.0 carries out on-line monitoring to electrolyte temperature, monitoring interval time is 8 hours, measuring for the first time electrolyte temperature is 939 ℃, the electrolyte temperature again measuring after 8 hours is 945 ℃, this computer-chronograph automatic discrimination electrolyte temperature raises, T
corr-T
targe=945 ℃-940 ℃=5 ℃, controlled at 0 ℃ of < T
corr-T
targetwithin the scope of 15 ℃ of <, computer is automatically adjusted setting voltage and is reduced 10mV., set on the basis of aluminum fluoride discharge quantity 20kg at this aluminium cell, Computer is calculated Bath Temperature rising T meanwhile
corr-T
targethe amount of the aluminum fluoride of=5 ℃ of interpolations is 20kg, carries out aluminum fluoride add 30kg by the automatic aluminum fluoride feeding device of electrolyzer.After being 8 hours interval time, again measuring electrolyte temperature is 941 ℃, and electrolyte temperature is controlled at the positive and negative 5 ℃ of scopes of design temperature.3 all after dates of temperature survey arrange aluminium cell aluminum yield, according to separate unit electrolyzer practical situation, set aluminium horizontal target value Al
targetfor 25cm, the aluminium level value 27cm measuring through all after dates of 3 temperature surveys, if electrolyte temperature is at 0 ℃ of < T this moment
corr-T
target15 ℃ of scopes of <, aluminum yield is got by set(ting)value.
Embodiment 3
The present embodiment utilize computer to the data of the real time on-line monitoring of electrolyte temperature as feedback, according to the separate unit aluminium cell condition of production, set electrolyte temperature target value T
targetbe 940 ℃ and superheating temperature target value Sh
targetafter being 15 ℃, utilize utility model patent number to be: the ionogen temperature measuring equipment of ZL201220065837.0 carries out on-line monitoring to electrolyte temperature, monitoring interval time is 8 hours, measuring for the first time electrolyte temperature is 939 ℃, the electrolyte temperature again measuring after 8 hours is 956 ℃, this computer-chronograph automatic discrimination electrolyte temperature raises, T
corr-T
targe=956 ℃-940 ℃=16 ℃, controlled at 15 ℃ of < T
corr-T
targetin scope, computer carries out early warning and returns to the voltage of last time setting, hand inspection electrolyzer situation.
Claims (4)
1. an aluminium cell computer energy equilibrium control method, is characterized in that comprising that aluminium cell voltage control step, aluminium cell aluminum fluoride add control step and aluminium cell aluminum yield is controlled step;
Described aluminium cell voltage control step comprises following logic determining step:
A. according to the separate unit aluminium cell condition of production, set electrolyte temperature target value T
targetwith superheating temperature target value Sh
targetafter, utilize ionogen temperature measuring equipment to carry out on-line monitoring to electrolyte temperature, resulting on-line monitoring temperature data is feedback information, computer calculates electrolyte primary crystal temperature and electrolyte superheat degree according to the molecular ratio of input, ionogen oxidation aluminum concentration, lithium salt and on-line monitoring temperature data automatically, and the data that aftertreatment obtains through one-period calculate the weighted mean T of electrolyte temperature and electrolyte superheat degree
corrand Sh
corr;
B. according to the weighted mean T of electrolyte temperature and electrolyte superheat degree
corrand Sh
corrsetting voltage:
Described T
corr< T
target, need to improve setting voltage;
0 ℃ of described < T
corr-T
target15 ℃ of <, need to improve setting voltage;
15 ℃ of described < T
corr-T
target, hand inspection electrolyzer situation, without abnormal conditions, reduces setting voltage by measuring and calculating value by echelon by computer;
Computer compares according to the difference of aluminium electrolyte temperature weighted mean and target temperature value and 15 ℃, supposes that electrolytic resistance is constant, calculates the voltage that improves and reduce, and automatically carry out lifting by the linear relationship between resistance and bath voltage and temperature.
2. aluminium cell computer energy equilibrium control method according to claim 1, is characterized in that aluminium cell aluminum fluoride adds that to control step specific as follows:
The electrolyte primary crystal temperature objectives value T that separate unit electrolyzer is set
llqtarget, by on-line monitoring, obtain the feeding quantity that data that after electrolyte primary crystal temperature, aftertreatment obtains through one-period calculate electrolyzer aluminum fluoride, by the automatic aluminum fluoride feeding quantity of electrolyzer device, carry out aluminum fluoride interpolation;
Aluminum fluoride addition is determined by the difference between ionogen actual measurement liquidus temperature and electrolyte primary crystal temperature objectives value, electrolyte primary crystal temperature objectives value is that the best electrolyte ingredient under electrolysis of aluminum optimum process technology condition determines electrolyte primary crystal temperature, for ionogen being surveyed to the liquidus temperature that liquidus temperature is adjusted to optimum process technology system, need to make ionogen actual measurement liquidus temperature all the time in target liquidus temperature span of control by adjusting, control aluminum fluoride input amount.
3. aluminium cell computer energy equilibrium control method according to claim 1 and 2, is characterized in that it is to set aluminium horizontal target value Al according to separate unit electrolyzer practical situation that aluminium cell aluminum yield is controlled step
target, by measuring aluminium horizontal target value, the data that aftertreatment obtains through one-period are calculated aluminum yield and are gone out aluminium operation; Electrolyzer aluminum yield is determined by current efficiency, but be subject to superheating temperature and influence of magnetic field, under the definite prerequisite of electric tank working voltage, electrolyte ingredient, the impact on electrolyzer by measured current efficiency and electrolyte superheat degree and on-the-spot electrolyzer magnetic field, determine aluminum yield, by the adjustment of aluminum yield, guarantee that aluminium cell is all the time in best criticality efficient, low consumption.
4. aluminium cell computer energy equilibrium control method according to claim 3, is characterized in that the described aluminium horizontal target value that goes out is measured by high precision anode stroke measurment.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9996074B2 (en) | 2016-09-21 | 2018-06-12 | International Business Machines Corporation | System and predictive modeling method for smelting process control based on multi-source information with heterogeneous relatedness |
| CN110413938A (en) * | 2019-08-30 | 2019-11-05 | 沈阳铝镁设计研究院有限公司 | A kind of aluminium cell goes out the calculation method of aluminium task |
| CN111005039A (en) * | 2020-02-17 | 2020-04-14 | 云南铝业股份有限公司 | Integrated online measurement method for temperatures of furnace bottom, square steel and cell shell of aluminum electrolysis cell |
| CN112239873A (en) * | 2019-07-19 | 2021-01-19 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis process parameter optimization method and aluminum electrolysis cell set |
| CN116334694A (en) * | 2023-04-14 | 2023-06-27 | 东北大学 | Intelligent aluminum electrolysis control method based on superheat degree data driving |
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| FR2830875A1 (en) * | 2001-10-15 | 2003-04-18 | Pechiney Aluminium | Regulation of an electrolytic cell for the production of aluminum involves controlled addition of alumina as a function of the amount of undissolved alumina in the molten bath |
| CN1557995A (en) * | 2004-01-18 | 2004-12-29 | 泰安泰山铝电有限公司 | Energy-saving method for preparing electrolytic aluminium by reducing bath voltage |
| CN101109092A (en) * | 2007-06-26 | 2008-01-23 | 中国铝业股份有限公司 | Energy equilibrium control method for aluminum cell |
| CN101275247A (en) * | 2007-12-20 | 2008-10-01 | 中国铝业股份有限公司 | Method for controlling energetic balance of aluminum cell |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2830875A1 (en) * | 2001-10-15 | 2003-04-18 | Pechiney Aluminium | Regulation of an electrolytic cell for the production of aluminum involves controlled addition of alumina as a function of the amount of undissolved alumina in the molten bath |
| CN1557995A (en) * | 2004-01-18 | 2004-12-29 | 泰安泰山铝电有限公司 | Energy-saving method for preparing electrolytic aluminium by reducing bath voltage |
| CN101109092A (en) * | 2007-06-26 | 2008-01-23 | 中国铝业股份有限公司 | Energy equilibrium control method for aluminum cell |
| CN101275247A (en) * | 2007-12-20 | 2008-10-01 | 中国铝业股份有限公司 | Method for controlling energetic balance of aluminum cell |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9996074B2 (en) | 2016-09-21 | 2018-06-12 | International Business Machines Corporation | System and predictive modeling method for smelting process control based on multi-source information with heterogeneous relatedness |
| CN112239873A (en) * | 2019-07-19 | 2021-01-19 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis process parameter optimization method and aluminum electrolysis cell set |
| CN110413938A (en) * | 2019-08-30 | 2019-11-05 | 沈阳铝镁设计研究院有限公司 | A kind of aluminium cell goes out the calculation method of aluminium task |
| CN110413938B (en) * | 2019-08-30 | 2022-11-22 | 沈阳铝镁设计研究院有限公司 | Method for calculating aluminum outlet task of aluminum electrolysis cell |
| CN111005039A (en) * | 2020-02-17 | 2020-04-14 | 云南铝业股份有限公司 | Integrated online measurement method for temperatures of furnace bottom, square steel and cell shell of aluminum electrolysis cell |
| CN116334694A (en) * | 2023-04-14 | 2023-06-27 | 东北大学 | Intelligent aluminum electrolysis control method based on superheat degree data driving |
| CN116334694B (en) * | 2023-04-14 | 2024-02-13 | 东北大学 | Intelligent aluminum electrolysis control method based on superheat degree data driving |
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Application publication date: 20141126 |