CN101275247A - Method for controlling energetic balance of aluminum cell - Google Patents
Method for controlling energetic balance of aluminum cell Download PDFInfo
- Publication number
- CN101275247A CN101275247A CNA2007103036128A CN200710303612A CN101275247A CN 101275247 A CN101275247 A CN 101275247A CN A2007103036128 A CNA2007103036128 A CN A2007103036128A CN 200710303612 A CN200710303612 A CN 200710303612A CN 101275247 A CN101275247 A CN 101275247A
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- control
- electrolyzer
- electrobath
- machine
- aluminum
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 26
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000003203 everyday effect Effects 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 19
- 150000004673 fluoride salts Chemical class 0.000 claims description 13
- 239000004411 aluminium Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 238000011217 control strategy Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000002354 daily effect Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000013500 data storage Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 2
- 238000005868 electrolysis reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 229920006926 PFC Polymers 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
An energy control method for an aluminum electrobath relates to a control method of an intermediate point type discharging pre-bake aluminum electrobath thermal equilibrium. The invention is characterized in that: the method uses the measured electrobath temperature everyday inputting to the computer to obtain an average value of 5 days/10 days. The value is a target value of the electrobath energy equilibrium control which is revised by the concentration of the electrobath aluminum oxide. The bath control machine adjusts the discharging quantity of the aluminum oxide and fluoride according to the target value which changes the disadvantage of not linking directly to the electrobath thermal equilibrium state by using the bath voltage as the target value of the electrobath equilibrium control in the past time. The method can control the polar distance of the electrobath and the concentration of the aluminum oxide in a narrow range, at the same time the method also controls the fluoride in a stable state which is a benefit for the operation of the electrobath and saving energy and reducing the consumption for the production of electrolytic aluminum.
Description
Technical field
A kind of control method of energetic balance of aluminum cell relates to the thermally equilibrated control method of a kind of middle point feeding pre-calcining electrolytic cell.
Background technology
The ultimate aim of aluminium cell control is to make electrolyzer reach material balance and heat balance preferably, obtains better economic results.The tradition control method is with the bath voltage of the electrolyzer controlled target as the electrolyzer energy balance, by adjusting anode and adding that the control strategy of auxiliary excessive, the amount of owing, normal blanking realizes.This strategy has played huge pushing effect to improving the aluminum electrolyzation technology economic target, and current efficiency is brought up to about 94% from about 89%.But this control strategy is adjusted the bath voltage value, and also has suitable distance in the electrolyzer between the actual thermal equilibrium state.For concrete electrolytic aluminum process, guarantee the relatively stable of raw material, other operational condition of electrolyzer is down stable, and the superheating temperature of electrolyzer is relatively stable; Therefore, can be directly with electrolysis temperature as controlled target, can be directly the thermal equilibrium state of electrolyzer be characterized out, what control strategy was adjusted target itself is exactly the thermal equilibrium control target, undoubtedly to the validity of rule in aluminum electrolysis control strategy, operator play a positive role to the aspects such as understanding of electrolyzer operation conditions, play bigger pushing effect to improving the aluminum electrolyzation technology economic target.Reduce energy consumption in order to adapt to Aluminum Electrolysis Production, reduce discharge of harmful gases amounts such as PFCs, guarantee the steadily efficient operation of electrolysis production, improved stream efficient, improve cell life, effectively improve the control accuracy of concentration of aluminum oxide in aluminum cell, reach the better economic results purpose; Need seek a kind of effective aluminium cell thermal equilibrium control method based on temperature objectives.The ultimate aim of aluminium cell control is to make electrolyzer reach material balance and heat balance preferably, obtains better economic results; Heat balance is that aluminium cell is obtained the key of Technological Economy preferably.
Summary of the invention
Purpose of the present invention is exactly in order to satisfy discharge of harmful gases amount, the steady efficient operation that guarantees electrolysis production, raising current efficiency, cell life and the dense requirements of aluminum oxide in aluminum cell such as reducing energy consumption, minimizing PFCs, a kind of control method of energetic balance of aluminum cell to be provided.
The objective of the invention is to be achieved through the following technical solutions.
A kind of control method of energetic balance of aluminum cell is characterized in that control process comprises:
(1) writes down temperature in the ionogen that every day, manual measurement recorded,, obtain its 5 days/10 daily mean, as the value of feedback of groove control system capacity balancing control with its input computer;
(2) adopt the target value of temperature, with the sign of temperature as the aluminium cell thermal equilibrium state as electrolyzer control;
(3),, reach electrolyzer and operate in the purpose of energy balance state preferably by groove control system controlled oxidation aluminium and fluoride salt blanking amount with the blanking amount control condition of temperature objectives set(ting)value as alumina blanking amount and fluoride salt;
(4) adopt the target value of temperature, on monitoring host computer, set, and, realize the accurate control of electrolyzer heat balance system by passing to the slot control machine system under the network as electrolyzer control.
The control method of a kind of energetic balance of aluminum cell of the present invention is characterized in that described aluminum electrolytic cell control system is made up of monitor workstation, slot control machine, crust breaking blanking system, lift portion.
The control method of a kind of energetic balance of aluminum cell of the present invention is characterized in that described slot control machine comprises:
(1) electric current and voltage test section: the voltage and the potline current variation value that detect electrolyzer;
(2) communication interface part: accept the upper computer setup parameter and upload operating parameter;
(3) control drive part: the control to crust breaking blanking system and lift portion drives;
(4) CPU microprocessor and memory portion: to detection signal parsing and calculating and data storage and the action of sending steering order control crust breaking blanking system and lift portion according to control strategy;
(5) show and the button operation part: the operator-machine-interface part of controlling machine.
(6) monitoring host computer part: set the slot control machine operational parameter control, and the technological operation and the material dispensing of electrolyzer carried out centralized Control by field bus control system, carry out data drawing list generation, storage, printout simultaneously, many slot control machines of a monitoring host computer monitoring;
(7) system software branch: slot control machine program and upper monitoring machine program are formed, the slot control machine program is to be solidificated in the storer of slot control machine, upper monitoring machine program is to leave in the upper monitoring machine, by programming its mode with software function module is stored in slot control machine and the monitoring host computer, realizes by Controlling System.
Method of the present invention is utilized temperature in the ionogen that every day, manual measurement recorded, with its input computer, as the value of feedback of groove control system capacity balancing control; Adopt the target value of temperature as electrolyzer control, with the sign of temperature as the electrolyzer energy state, when utilizing bath voltage in the past as the target value of electrolyzer energy balance control, the deficiency that can not link directly with the electrolyzer energy state; With the blanking amount control condition of temperature objectives set(ting)value,, reach electrolyzer and operate in the purpose of energy balance state preferably by groove control system controlled oxidation aluminium and fluoride salt blanking amount as alumina blanking amount and fluoride salt.Use this method to the control pole span of electrolyzer and alumina concentration in narrower scope, also control fluoride salt simultaneously than steady state, help stablize the electrolyzer operation, help saving energy and reduce the cost of Aluminum Electrolysis Production.
Embodiment
A kind of control method of energetic balance of aluminum cell, its control process comprises:
(1) with temperature in the ionogen that every day, manual measurement recorded, input upper monitoring computer, obtain its 5 days/10 daily mean, this part of functions is stored in the monitoring host computer program part with programmodule, by passing to the slot control machine system under the field control network, as the value of feedback of groove control system capacity balancing control;
(2) by design temperature controlled target value (920 ℃ ~ 950 ℃) on monitoring host computer, and by passing to the slot control machine system under the fieldbus networks, groove control system compares electrolyzer temperature observed value and target value, draws cycle and adjustment amount that anode electrolytic cell is adjusted; This part of functions is stored in the slot control machine storer with programmodule.
(3) simultaneously in groove control system by setting up the relation of actual electrolysis temperature variation and alumina concentration and fluoride salt variation, realize the alumina blanking amount to electrolyzer, the control of fluoride salt material amount by the crust breaking on the control electrolyzer, blanking cylinder action cycle and interval, reach subcontrol electrolyzer thermal equilibrium.
(4) coordination of passing through adjustment of antianode electrolyzer pole span and alumina blanking amount, fluoride salt material amount is controlled, and realizes the accurate control of electrolyzer heat balance system, has obtained better economic results.
The present invention is described further below in conjunction with embodiment.
Embodiment 1
Control electrolyzer condition: 26 aluminium cells, its potline current 150kA, amount of electrolyte is 4 tons in calculating every electrolyzer, repeatedly demarcating blanking device blanking amount is 1.67kg～1.80kg, every electrolyzer has 4 blanking devices, the blanking number of times of every day is 290 times in one week, and the timed interval is 500s in the amount of the owing cycle, and blanking is spaced apart 180s in the excessive cycle.Molecular ratio 2.40～2.45, bath voltage control 4.08V.
We are in the electrolyzer computer control system, temperature controlled target value is set at 938 ℃, manually carry out a temperature survey to electrolyzer every day, the control system is by comparing measured temperature and target value, draw amplitude and cycle and electrolyzer aluminum oxide, fluoride salt blanking cycle and blanking interval that anode is adjusted, add aluminum oxide and fluoride salt amount by the pole span of control hoister control electrolyzer and crust breaking, blanking cylinder action cycle and the interval on the control electrolyzer, by above-mentioned groove control system coordination control.Reached following control effect, it is as follows to carry out artificial temperature measurement result:
| Temperature range | 936℃ | 937℃ | 938℃ | 939℃ |
| Electrolyzer platform number | 1 | 7 | 15 | 3 |
The per-cent that its temperature is controlled at (938 ± 2 ℃) scope is 100%.Bath voltage is controlled at 4.08V simultaneously, effect coefficient 0.05 time/groove day, has obtained and has controlled effect preferably; Can satisfy the needs of Aluminium Electrolysis control fully.
Use this method to the control pole span of electrolyzer and alumina concentration in narrower scope, also control fluoride salt simultaneously than steady state, help stablize the electrolyzer operation, help saving energy and reduce the cost of Aluminum Electrolysis Production.
Claims (3)
1. the control method of an energetic balance of aluminum cell is characterized in that control process comprises:
(1) writes down temperature in the ionogen that every day, manual measurement recorded,, obtain its 5 days/10 daily mean, as the value of feedback of groove control system capacity balancing control with its input computer;
(2) adopt the target value of temperature, with the sign of temperature as the aluminium cell thermal equilibrium state as electrolyzer control;
(3),, reach electrolyzer and operate in the purpose of energy balance state preferably by groove control system controlled oxidation aluminium and fluoride salt blanking amount with the blanking amount control condition of temperature objectives set(ting)value as alumina blanking amount and fluoride salt;
(4) adopt the target value of temperature, on monitoring host computer, set, and, realize the accurate control of electrolyzer heat balance system by passing to the slot control machine system under the network as electrolyzer control.
2. the control method of a kind of energetic balance of aluminum cell according to claim 1 is characterized in that described aluminum electrolytic cell control system is made up of monitor workstation, slot control machine, crust breaking blanking system, lift portion.
3. the control method of a kind of energetic balance of aluminum cell according to claim 1 is characterized in that described slot control machine comprises:
(1) electric current and voltage test section: the voltage and the potline current variation value that detect electrolyzer;
(2) communication interface part: accept the upper computer setup parameter and upload operating parameter;
(3) control drive part: the control to crust breaking blanking system and lift portion drives;
(4) CPU microprocessor and memory portion: to detection signal parsing and calculating and data storage and the action of sending steering order control crust breaking blanking system and lift portion according to control strategy;
(5) show and the button operation part: the operator-machine-interface part of controlling machine.
(6) monitoring host computer part: set the slot control machine operational parameter control, and the technological operation and the material dispensing of electrolyzer carried out centralized Control by field bus control system, carry out data drawing list generation, storage, printout simultaneously, many slot control machines of a monitoring host computer monitoring;
(7) system software branch: slot control machine program and upper monitoring machine program are formed, the slot control machine program is to be solidificated in the storer of slot control machine, upper monitoring machine program is to leave in the upper monitoring machine, by programming its mode with software function module is stored in slot control machine and the monitoring host computer, realizes by Controlling System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103036128A CN101275247A (en) | 2007-12-20 | 2007-12-20 | Method for controlling energetic balance of aluminum cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103036128A CN101275247A (en) | 2007-12-20 | 2007-12-20 | Method for controlling energetic balance of aluminum cell |
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| Publication Number | Publication Date |
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| CN101275247A true CN101275247A (en) | 2008-10-01 |
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| CNA2007103036128A Pending CN101275247A (en) | 2007-12-20 | 2007-12-20 | Method for controlling energetic balance of aluminum cell |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962785A (en) * | 2010-10-22 | 2011-02-02 | 河南中孚实业股份有限公司 | Heat balance control method for aluminum electrolysis cell in low-voltage operation |
| CN102373487A (en) * | 2010-08-05 | 2012-03-14 | 中国铝业股份有限公司 | Method for controlling addition of fluoride salts in prebaked aluminium electrolysis cell |
| CN103014773A (en) * | 2012-11-26 | 2013-04-03 | 中国铝业股份有限公司 | Device and method for balancing alumina concentration of aluminium electrolysis tank |
| CN103114309A (en) * | 2013-02-25 | 2013-05-22 | 重庆大学 | Adaptive control method of electrolytic cell |
| CN103603010A (en) * | 2013-11-18 | 2014-02-26 | 中南大学 | Calculation method of voltage and heat balance of aluminum electrolytic tank |
| CN104164682A (en) * | 2014-09-11 | 2014-11-26 | 云南云铝润鑫铝业有限公司 | Aluminum cell computer energy balance control method |
| CN107574461A (en) * | 2016-07-05 | 2018-01-12 | 特里梅特铝制品公司 | Fusion electrolysis equipment and its adjusting method of operation |
| CN108595458A (en) * | 2017-12-30 | 2018-09-28 | 贵阳铝镁设计研究院有限公司 | Data integration platform based on aluminium electroloysis factory |
-
2007
- 2007-12-20 CN CNA2007103036128A patent/CN101275247A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373487A (en) * | 2010-08-05 | 2012-03-14 | 中国铝业股份有限公司 | Method for controlling addition of fluoride salts in prebaked aluminium electrolysis cell |
| CN101962785A (en) * | 2010-10-22 | 2011-02-02 | 河南中孚实业股份有限公司 | Heat balance control method for aluminum electrolysis cell in low-voltage operation |
| CN103014773A (en) * | 2012-11-26 | 2013-04-03 | 中国铝业股份有限公司 | Device and method for balancing alumina concentration of aluminium electrolysis tank |
| CN103114309A (en) * | 2013-02-25 | 2013-05-22 | 重庆大学 | Adaptive control method of electrolytic cell |
| CN103603010A (en) * | 2013-11-18 | 2014-02-26 | 中南大学 | Calculation method of voltage and heat balance of aluminum electrolytic tank |
| CN103603010B (en) * | 2013-11-18 | 2015-12-02 | 中南大学 | A kind of aluminium cell voltage and thermally equilibrated method of calculation |
| CN104164682A (en) * | 2014-09-11 | 2014-11-26 | 云南云铝润鑫铝业有限公司 | Aluminum cell computer energy balance control method |
| CN107574461A (en) * | 2016-07-05 | 2018-01-12 | 特里梅特铝制品公司 | Fusion electrolysis equipment and its adjusting method of operation |
| CN108595458A (en) * | 2017-12-30 | 2018-09-28 | 贵阳铝镁设计研究院有限公司 | Data integration platform based on aluminium electroloysis factory |
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Open date: 20081001 |