CN101082135A - Aluminum cell low aluminum oxide concentration control method - Google Patents
Aluminum cell low aluminum oxide concentration control method Download PDFInfo
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- CN101082135A CN101082135A CN 200710049426 CN200710049426A CN101082135A CN 101082135 A CN101082135 A CN 101082135A CN 200710049426 CN200710049426 CN 200710049426 CN 200710049426 A CN200710049426 A CN 200710049426A CN 101082135 A CN101082135 A CN 101082135A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title claims description 15
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Feedback Control In General (AREA)
Abstract
The present invention relates to aluminum electrolyzing production technology, and is especially method of controlling low alumina concentration in aluminum electrolyzer. The method includes one step of regulating the control system parameters, including shortened datum periods, feeding initiation time, etc with one host computer; and one step of regulating the slope and feeding rate with one host computer to increase the lower limit and reduce the upper limit of exact value domain of the slope and the accumulated slope and to decrease the exact value domain of the feeding rate. The method can control the alumina concentration in the electrolyzer within 1.5-3.5 %, lower the cathode voltage drop in the electrolyzer to 399 mV, raise the anode effect controlling rate to 90 % and raise current efficiency by 0.1 %. The method of the present invention may be applied in the intelligent fuzzy control system for aluminum electrolyzer.
Description
Technical field
The present invention relates to a kind of Aluminium Electrolysis technology, specifically relate to a kind of aluminum cell low aluminum oxide concentration control method.
Background technology
At present, intelligent fuzzy control technique is adopted in the control of domestic concentration of aluminum oxide in aluminum electrolytic bath.Its method is the full distributed control scheme of two-stage of employing " slot control machine-upper computer (industrial control microcomputer) ", and adopts CAN communication protocol to constitute the network system.Each electrolyzer is equipped with a slot control machine as direct control level, and it possesses the ability of independently carrying out the sampling of bath voltage and potline current, and the material balance and the thermally equilibrated quick change procedure of aluminium cell are controlled in real time; The upper computer system based on industrial control microcomputer of being equipped with in the microcomputer station links by CAN bus communication network and slot control machine as the process monitoring level, and the operational process of each slot control machine is monitored and finish the production management function.Because the Controlling System parameter in the last microcomputer is provided with unreasonable, cause the alumina concentration control effect in the electrolyzer relatively poor, alumina concentration is higher, and generally between 2.5～4.5%, and electrolyzer ideal alumina concentration span of control is between 1.5～3.5%.
Summary of the invention
The technical problem to be solved in the present invention is at the deficiencies in the prior art, providing a kind of is reduced to the alumina concentration in the electrolyzer between 1.5～3.5% between 2.5%～4.5%, and to the stable control of this realization, to reach raising current efficiency, reduce a kind of aluminum cell low aluminum oxide concentration control method of the purpose of power consumption.
A kind of aluminum cell low aluminum oxide concentration control method of the present invention is achieved by following technical proposals: a kind of aluminum cell low aluminum oxide concentration control method, comprise slot control machine, upper computer, and it is characterized in that: described method comprises the steps:
1) adjusting computer system parameter step refers to by upper computer the Controlling System parameter be adjusted, shorten the benchmark amount of the owing cycle, blanking cycle, maximum excessive time after excessive cycle of benchmark, benchmark normal cycle, blanking initialization time, effect, prolong minimum positive shift time; And the amount of the owing cycle is greater than the excessive cycle;
2) adjustment slope, accumulative total slope, blanking speed step refer to increase by upper computer the lower limit of the exact value domain of slope, accumulative total slope, reduce its upper limit, dwindle the exact value domain of blanking speed; The PC control parameter program is adjusted: 8030 parameters, 8032 parameters, 8034 parameters, 8036 parameters, 80A6 parameter, 80A8 parameter, 80AA parameter, 80AC parameter, 8098 parameters.
A kind of aluminum cell low aluminum oxide concentration control method of the present invention has following beneficial effect compared with prior art: the present invention according to blanking control strategy as required to the requirement of cell resistance slope, system parameter is optimized: shorten the benchmark amount of the owing cycle, blanking cycle, maximum excessive time after excessive cycle of benchmark, benchmark normal cycle, blanking initialization time, effect, and the amount of the owing cycle prolongs minimum positive shift time greater than the excessive cycle.And by adjustment to slope, accumulative total slope, blanking rate parameter, alumina concentration is remained in the target zone, and last microcomputer has been carried out reasonable disposition as sequence of control such as Unit 8030, Unit 8032, Unit 8034, reached alumina concentration purpose in the stable control ionogen.For controlled oxidation aluminum concentration accurately, the inference engine domain has been carried out the science adjustment, increase the lower limit of the exact value domain of slope, accumulation slope for this reason, reduce its upper limit, in fact dwindle they the domain of corresponding exact value, the corresponding quantized value of same exact value is increased, and use the exact value domain that dwindles blanking speed with quadrat method, to reach the purpose of fine adjusting blanking speed according to the less variation of slope, accumulation slope.Simultaneously, last microcomputer control parameter has been carried out reasonable adjustment as 8030 parameters, 8032 parameters, 8034 parameters, 8036 parameters, 80A6 parameter, 80A8 parameter, 80AA parameter, 80AC parameter, 8098 parameter supervisors, the alumina stable on the aluminium cell is controlled between 1.5～3.5%; The cathode drop of aluminium cell is reduced to 399mV by 428mV, and the controlled rate of anode effect brings up to 90% from 60%, and current efficiency has improved 0.1%.The present invention can be applicable to aluminium cell Intelligent Fuzzy Control system.
Embodiment
Below in conjunction with embodiment concentration of aluminum oxide in aluminum electrolytic bath control method technical scheme of the present invention is further described.
A kind of aluminum cell low aluminum oxide concentration control method comprises slot control machine, upper computer, it is characterized in that: described method comprises the steps:
1) adjusting computer system parameter step refers to by upper computer the Controlling System parameter be adjusted, shorten the benchmark amount of the owing cycle, blanking cycle, maximum excessive time after excessive cycle of benchmark, benchmark normal cycle, blanking initialization time, effect, prolong minimum positive shift time; And the amount of the owing cycle is greater than the excessive cycle;
2) adjustment slope, accumulative total slope, blanking speed step refer to increase by upper computer the lower limit of the exact value domain of slope, accumulative total slope, reduce its upper limit, dwindle the exact value domain of blanking speed; The PC control parameter program is adjusted: 8030 parameters, 8032 parameters, 8034 parameters, 8036 parameters, 80A6 parameter, 80A8 parameter, 80AA parameter, 80AC parameter, 8098 parameters.
2, aluminum cell low aluminum oxide concentration control method according to claim 1 is characterized in that: the adjustment of described computer programming system parameter is reduced between 1.5%～3.5% the alumina concentration in the electrolyzer gradually.
Embodiment 1.
The adjustment of the first step by the computer system parameter makes the alumina concentration in the electrolyzer be reduced to 1.5%～3.5% scope gradually.According to blanking control strategy as required to the requirement of cell resistance slope, system parameter is optimized: shorten the benchmark amount of the owing cycle, blanking cycle, maximum excessive time after excessive cycle of benchmark, benchmark normal cycle, blanking initialization time, effect, and the amount of the owing cycle prolongs minimum positive shift time greater than the excessive cycle.
Second step is by the adjustment to slope, accumulative total slope, blanking rate parameter, alumina concentration is remained in the target zone, and last Control Program for Microcomputers [Digital Research] (as Unit 8030, Unit 8032, Unit 8034 etc.) has been carried out reasonable disposition, reached alumina concentration purpose in the stable control ionogen.For controlled oxidation aluminum concentration accurately, the inference engine domain has been carried out the science adjustment, increase the lower limit of the exact value domain of slope, accumulation slope for this reason, reduce its upper limit, in fact dwindle they the domain of corresponding exact value, the corresponding quantized value of same exact value is increased, and use the exact value domain that dwindles blanking speed with quadrat method, to reach the purpose of fine adjusting blanking speed according to the less variation of slope, accumulation slope.Simultaneously, last microcomputer control ginseng program has been carried out reasonable adjustment: 8030 parameters, 8032 parameters, 8034 parameters, 8036 parameters, 80A6 parameter, 80A8 parameter, 80AA parameter, 80AC parameter, 8098 parameters etc.
Claims (2)
1, a kind of aluminum cell low aluminum oxide concentration control method comprises slot control machine, upper computer, it is characterized in that: described method comprises the steps:
1) adjusting computer system parameter step refers to by upper computer the Controlling System parameter be adjusted, shorten the benchmark amount of the owing cycle, blanking cycle, maximum excessive time after excessive cycle of benchmark, benchmark normal cycle, blanking initialization time, effect, prolong minimum positive shift time; And the amount of the owing cycle is greater than the excessive cycle;
2) adjustment slope, accumulative total slope, blanking speed step refer to increase by upper computer the lower limit of the exact value domain of slope, accumulative total slope, reduce its upper limit, dwindle the exact value domain of blanking speed; The PC control parameter program is adjusted: 8030 parameters, 8032 parameters, 8034 parameters, 8036 parameters, 80A6 parameter, 80A8 parameter, 80AA parameter, 80AC parameter, 8098 parameters.
2, aluminum cell low aluminum oxide concentration control method according to claim 1 is characterized in that: the adjustment of described computer programming system parameter is reduced between 1.5%～3.5% the alumina concentration in the electrolyzer gradually.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710049426 CN101082135A (en) | 2007-06-26 | 2007-06-26 | Aluminum cell low aluminum oxide concentration control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710049426 CN101082135A (en) | 2007-06-26 | 2007-06-26 | Aluminum cell low aluminum oxide concentration control method |
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| CN101082135A true CN101082135A (en) | 2007-12-05 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275249B (en) * | 2007-12-20 | 2010-06-02 | 中国铝业股份有限公司 | Method for real-time detection of concentration of aluminum oxide in aluminum cell |
| CN101643920B (en) * | 2009-09-10 | 2011-02-09 | 中国铝业股份有限公司 | Method for controlling concentration of aluminum oxide in aluminum electrolytic bath |
| CN102230192A (en) * | 2011-06-20 | 2011-11-02 | 东北大学 | On-line identification method for concentration signal of aluminum oxide in electrolyte in aluminum electrolysis cell |
| CN102234818A (en) * | 2011-06-21 | 2011-11-09 | 中国铝业股份有限公司 | Constant value control method for alumina concentration of aluminum cell |
| CN104120456A (en) * | 2014-07-31 | 2014-10-29 | 湖南创元铝业有限公司 | Fuzzy control method of aluminum electrolysis |
| CN104195597A (en) * | 2014-09-16 | 2014-12-10 | 湖南创元铝业有限公司 | Feeding control method for aluminum oxide |
| CN105603460A (en) * | 2016-03-10 | 2016-05-25 | 中南大学 | Rare earth oxide feeding control method for rare earth electrolytic bath |
| CN109722679A (en) * | 2019-02-03 | 2019-05-07 | 中南大学 | A kind of extremely low detection method and device of the alumina concentration of aluminium electroloysis |
| CN110106530A (en) * | 2019-02-03 | 2019-08-09 | 中南大学 | A kind of the electrolyte temperature monitoring method and device of aluminium electroloysis |
| CN112575349A (en) * | 2019-09-29 | 2021-03-30 | 沈阳铝镁设计研究院有限公司 | Aluminum oxide blanking and concentration control method for aluminum electrolysis cell |
-
2007
- 2007-06-26 CN CN 200710049426 patent/CN101082135A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275249B (en) * | 2007-12-20 | 2010-06-02 | 中国铝业股份有限公司 | Method for real-time detection of concentration of aluminum oxide in aluminum cell |
| CN101643920B (en) * | 2009-09-10 | 2011-02-09 | 中国铝业股份有限公司 | Method for controlling concentration of aluminum oxide in aluminum electrolytic bath |
| CN102230192A (en) * | 2011-06-20 | 2011-11-02 | 东北大学 | On-line identification method for concentration signal of aluminum oxide in electrolyte in aluminum electrolysis cell |
| CN102230192B (en) * | 2011-06-20 | 2013-03-20 | 东北大学 | On-line identification method for concentration signal of aluminum oxide in electrolyte in aluminum electrolysis cell |
| CN102234818A (en) * | 2011-06-21 | 2011-11-09 | 中国铝业股份有限公司 | Constant value control method for alumina concentration of aluminum cell |
| CN104120456B (en) * | 2014-07-31 | 2016-06-22 | 湖南创元铝业有限公司 | Aluminium electroloysis fuzzy control method |
| CN104120456A (en) * | 2014-07-31 | 2014-10-29 | 湖南创元铝业有限公司 | Fuzzy control method of aluminum electrolysis |
| CN104195597A (en) * | 2014-09-16 | 2014-12-10 | 湖南创元铝业有限公司 | Feeding control method for aluminum oxide |
| CN104195597B (en) * | 2014-09-16 | 2016-08-17 | 湖南创元铝业有限公司 | Aluminum oxide feeds intake control method |
| CN105603460A (en) * | 2016-03-10 | 2016-05-25 | 中南大学 | Rare earth oxide feeding control method for rare earth electrolytic bath |
| CN109722679A (en) * | 2019-02-03 | 2019-05-07 | 中南大学 | A kind of extremely low detection method and device of the alumina concentration of aluminium electroloysis |
| CN110106530A (en) * | 2019-02-03 | 2019-08-09 | 中南大学 | A kind of the electrolyte temperature monitoring method and device of aluminium electroloysis |
| CN110106530B (en) * | 2019-02-03 | 2020-06-23 | 中南大学 | Method and device for monitoring electrolyte temperature of aluminum electrolysis |
| CN112575349A (en) * | 2019-09-29 | 2021-03-30 | 沈阳铝镁设计研究院有限公司 | Aluminum oxide blanking and concentration control method for aluminum electrolysis cell |
| CN112575349B (en) * | 2019-09-29 | 2023-09-15 | 沈阳铝镁设计研究院有限公司 | Aluminum oxide blanking and concentration control method for aluminum electrolysis cell |
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