CN105671595A - Method for monitoring current efficiency of aluminum electrolytic cell - Google Patents
Method for monitoring current efficiency of aluminum electrolytic cell Download PDFInfo
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- CN105671595A CN105671595A CN201610139466.9A CN201610139466A CN105671595A CN 105671595 A CN105671595 A CN 105671595A CN 201610139466 A CN201610139466 A CN 201610139466A CN 105671595 A CN105671595 A CN 105671595A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/20—Automatic control or regulation of cells
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a method for monitoring current efficiency of an aluminum electrolytic cell. The method is characterized in that in a process of producing virgin aluminum in the aluminum electrolytic cell, brass is added into a monitoring slot twice; after the brass is uniformly molten, practical aluminum dissolved quantity within the period is monitored in an accumulation manner; and by monitoring the changes of the brass content of the virgin aluminum in the electrolytic cell twice, the current efficiency of the electrolytic cell within the inventory period is precisely calculated. The method provides technical guarantee for precisely monitoring the current efficiency of single slot or the electrolytic cell within the time period of one workshop section, and provides technical support for the production management department to obtain accurate data in fine management and in a special test. In a normal production management process, the method achieves guidance and supervision effects in aspect of analysis of a cell condition, evaluation of an operation condition, contrastive analysis of historical data, implementation of quality-improving and efficiency-increasing measures, and the like, and is beneficial for precise control and scientific management on production operation of the electrolytic cell.
Description
Technical field:
The present invention relates to a kind of aluminium cell to produce in primary aluminum process by adding the method that pyrite carrys out monitoring current efficiency, belong to electrolysis series field.
Background technology:
The monitoring of current current efficiency of aluminium cell, mainly relies on Theoretical Calculation to get, and its order of accuarcy can not become weighs the accurate indicator that cell line produces, and more can not monitor for the current efficiency of separate unit electrolysis bath provides data support accurately.
The electrochemical equivalent * 24* potline current of theoretical yield Q=aluminum
Actual production W=scene goes out the weighed quantity that aluminum electronic measurement standard is put
Current efficiency л=W/Q
The advantage of this way is simple to operate, information fast, it is possible to be estimated to certain groove or the current efficiency in certain workshop section's cycle short period within a short period of time.
This way weak point is accurate not, it is impossible to the current efficiency of calculating separate unit Cao Huoyige workshop section time cycle Inner electrolysis groove exactly, it is impossible to provide data support accurately for production management and special trial.
The present invention is by adding the pyrite method of carrying out monitoring current efficiency, it is possible to accurately monitor the current efficiency of separate unit Cao Huoyige workshop section time cycle Inner electrolysis groove.
By the enforcement of the present invention, it is possible to accurately manage the acquisition providing data support accurately and various test data for production line.
Summary of the invention:
The technical problem to be solved is: provide a kind of method monitoring current efficiency of aluminium cell, carrys out monitoring current efficiency by adding pyrite in producing primary aluminum process,
The present invention solves that the technical scheme that technical problem is taked is as follows:
A kind of method monitoring current efficiency of aluminium cell, by determining to add pyrite twice in groove to prison, the actual aluminum yield after uniformly melting, in accumulative prison fixed cycle, by the change of twice bronze medal content of primary aluminum in electrolysis bath, accurately calculate the current efficiency taking inventory cycle Inner electrolysis groove.
The method of described monitoring current efficiency of aluminium cell, it specifically comprises the following steps that
1. the determination of tracer element copper: adopting purity to reach the fine copper of more than 99.99% as tracer element, accurately determine the weight showing comprehensive elemental copper, weight error controls within 10%, and copper of weighing is accurate to gram;
2. first time adds copper: first determine this original pattern concentration of copper in aluminum liquid before taking this original pattern, when in aluminum liquid, the concentration of copper is too low, analytical error will be bigger than normal, the part by weight of requirement aluminum liquid and copper is (3.5～4.0): 1, if concentration is too low, first should adding the copper of q.s before taking inventory in sample slot, copper is separately added into from the aluminium flowing-out mouth of sample slot and two mouths of flue end respectively, and this adds copper and within first 24 hours, should carry out taking this original pattern;
3. take background aluminum sample: electrolysis bath takes background aluminum sample to taking inventory groove before adding copper after going out aluminum, respectively takes 3 samples at aluminium flowing-out mouth and floss hole, and records sample time, be accurate to minute;
4. second time adds copper: is added from aluminium flowing-out mouth and floss hole respectively by copper, holds copper billet with iron implements and slowly put into groove, stands about 15 minutes, stir furnace bottom with iron implements, it is to avoid sink to furnace bottom after one hour in aluminum liquid;
5. taking and take inventory sample: after second time adds copper 24 hours, prison determine to take in groove to take inventory sample, respectively takes 3 aluminum samples at aluminium flowing-out mouth and flue end respectively, record sample time, is accurate to minute;
6. primary aluminum sample analysis in groove determine by prison: to the spectrum analysis taking inventory the aluminum sample that takes of front and back and carrying out copper content, and analysis precision is to ppm; Sample after analysis preserves, in order to rechecking;
7. substitute into take inventory in computing formula by sample data and be calculated, try to achieve aluminum amount in the groove of electrolysis bath;
8. the calculating of period aluminum yield is taken inventory: taking inventory natural law t is 90 days, accurately records aluminum yield every day, and aluminum yield weighing precision is accurate to kg; It is take inventory adding up of 90 aluminum yields of period that every sample slot goes out aluminum total amount for 90 days;
9. take inventory period current efficiency to calculate: current efficiency=go out aluminum efficiency+amount to efficiency producing aluminum.
Previous step 7. described in take inventory computing formula as follows:
In formula: aluminum amount, units/kg are produced in M groove inherence;
M adds the quality of copper, units/kg;
The purity of k copper;
The product aluminum amount of electrolysis bath in n inventory procedure, units/kg, need to, to electrolytic cell currents efficiency valuation, if sampling interval 24 hours, then be aluminum yield on the same day;
The content of buried copper before taking inventory;
Take inventory the content terminating buried copper;
R casting yield, due to the melting in the electrolyte of tracer element, volatilization loss, generally to have the numerical value of casting yield.
The positive beneficial effect of the present invention: the current efficiency that the present invention is accurately monitoring separate unit Cao Huoyige workshop section time cycle Inner electrolysis groove provides technical guarantee, provides technical support to production management department's acquisition of accurate data in fine-grained management and special test. In normal production management process, to the analysis of groove condition, the evaluation of ruuning situation, the relative analysis of historical data, upgrading effective utilization measure implement etc. aspect serve guidance and supervise and examine effect, contribute to being precisely controlled and scientific management of electrolysis bath production run.
Detailed description of the invention:
Be can be as accurate as the current efficiency accurately monitoring separate unit or workshop section's electrolysis bath by the present invention, below in conjunction with specific embodiment, the present invention made further explanation and description:
A kind of method monitoring current efficiency of aluminium cell, by determining to add pyrite twice in groove to prison, the actual aluminum yield after uniformly melting, in accumulative prison fixed cycle, by the change of twice bronze medal content of primary aluminum in electrolysis bath, accurately calculate the current efficiency taking inventory cycle Inner electrolysis groove.
The method of described monitoring current efficiency of aluminium cell, it specifically comprises the following steps that
1. the determination of tracer element copper: adopting purity to reach the fine copper of more than 99.99% as tracer element, accurately determine the weight showing comprehensive elemental copper, weight error controls within 10%, and copper of weighing is accurate to gram;
2. first time adds copper: first determine this original pattern concentration of copper in aluminum liquid before taking this original pattern, when in aluminum liquid, the concentration of copper is too low, analytical error will be bigger than normal, the part by weight of requirement aluminum liquid and copper is (3.5～4.0): 1, when in 400KA electrolytic bath, aluminum amount is approximately in about 27 tons, weight of copper is 7Kg; When in 320KA electrolytic bath, aluminum amount is approximately in about 22 tons, title weight of copper is 6Kg; If concentration is too low, first should adding the copper of q.s before taking inventory in sample slot, copper is separately added into from the aluminium flowing-out mouth of sample slot and two mouths of flue end respectively, and this adds copper and within first 24 hours, should carry out taking this original pattern;
3. take background aluminum sample: electrolysis bath takes background aluminum sample to taking inventory groove before adding copper after going out aluminum, respectively takes 3 samples at aluminium flowing-out mouth and floss hole, and records sample time, be accurate to minute;
4. second time adds copper: is added from aluminium flowing-out mouth and floss hole respectively by copper, holds copper billet with iron implements and slowly put into groove, stands about 15 minutes, stir furnace bottom with iron implements, it is to avoid sink to furnace bottom after one hour in aluminum liquid;
5. taking and take inventory sample: after second time adds copper 24 hours, prison determine to take in groove to take inventory sample, respectively takes 3 aluminum samples at aluminium flowing-out mouth and flue end respectively, record sample time, is accurate to minute;
6. primary aluminum sample analysis in groove determine by prison: to the spectrum analysis taking inventory the aluminum sample that takes of front and back and carrying out copper content, and analysis precision is to ppm; Sample after analysis preserves, in order to rechecking;
7. substitute into take inventory in computing formula by sample data and be calculated, try to achieve aluminum amount in the groove of electrolysis bath;
8. the calculating of period aluminum yield is taken inventory: taking inventory natural law t is 90 days, accurately records aluminum yield every day, and aluminum yield weighing precision is accurate to kg; It is take inventory adding up of 90 aluminum yields of period that every sample slot goes out aluminum total amount for 90 days;
9. take inventory period current efficiency to calculate: current efficiency=go out aluminum efficiency+amount to efficiency producing aluminum.
Previous step 7. in, it is described that to take inventory computing formula as follows:
In formula: aluminum amount, units/kg are produced in M groove inherence;
M adds the quality of copper, units/kg;
The purity of k copper;
The product aluminum amount of electrolysis bath in n inventory procedure, units/kg, need to, to electrolytic cell currents efficiency valuation, if sampling interval 24 hours, then be aluminum yield on the same day;
The content of buried copper before taking inventory;
Take inventory the content terminating buried copper;
R casting yield, due to the melting in the electrolyte of tracer element, volatilization loss, generally to have the numerical value of casting yield.
The aluminum amount taking inventory in groove after adding copper for the first time: M1;
Take inventory the calculating of period aluminum yield: taking inventory natural law t is 90 days, every day accurately records aluminum yield, aluminum yield weighing precision is accurate to kg, specific requirement is as follows: go out aluminum platform bag bare weight m1 at foundry's accurate weighing before going out aluminum every time, aluminum by carrying out before platform contracted affreightment to sample slot, going out the weight m2 of platform contracted affreightment to foundry's precise aluminum liquid+platform bag after aluminum, this aluminum yield is m2-m1. If test trough is closed and is wrapped out aluminum, go out aluminum platform bag bare weight m1 at foundry's accurate weighing before going out aluminum every time, after First groove goes out aluminum, accurate recording is weighed weight m2, second groove go out aluminum after accurate recording weigh the 3rd groove of weight m3 go out aluminum after accurate recording weigh weight m4, then: First groove aluminum yield: m2-m1, second groove aluminum yield: m3-m2, the 3rd groove aluminum yield: m4-m3, by that analogy;
It is take inventory adding up of 90 aluminum yields of period that every sample slot goes out aluminum total amount for 90 days, is counted as ∑ M;
The aluminum amount that second time is taken inventory in groove after adding copper: M2;
Take inventory period current efficiency to calculate: current efficiency=go out aluminum efficiency+amount to efficiency producing aluminum
Go out aluminum efficiency (%)=∑ M/t*1000/0.3356*I*24*100%
Amount to efficiency (%)=(M2-M1)/t*1000/0.3356*I*24*100%
In formula: ∑ M takes inventory phase actual total aluminum yield, units/kg;
M1 first time adds copper and takes inventory aluminum amount in groove, units/kg;
M2 second time adds copper and takes inventory aluminum amount in groove, units/kg;
I takes inventory phase potline current intensity, answers segmentation to calculate as potline current intensity changes, unit A;
Make a record form, accurately record data, on-the-spot for: add copper amount, corresponding groove number, joining day, sample time, position, analysis result do a form; A form is done, as the record of initial data with review for taking inventory period aluminum yield.
The current efficiency that the present invention is accurately monitoring separate unit Cao Huoyige workshop section time cycle Inner electrolysis groove provides technical guarantee, and production management department's acquisition of accurate data in fine-grained management and special test is provided technical support. In normal production management process, to the analysis of groove condition, the evaluation of ruuning situation, the relative analysis of historical data, upgrading effective utilization measure implement etc. aspect serve guidance and supervise and examine effect, contribute to being precisely controlled and scientific management of electrolysis bath production run.
Claims (3)
1. the method monitoring current efficiency of aluminium cell, it is characterized in that: by determining to add pyrite twice in groove to prison, after uniformly melting, actual aluminum yield in accumulative prison fixed cycle, by the change of twice bronze medal content of primary aluminum in electrolysis bath, accurately calculate the current efficiency taking inventory cycle Inner electrolysis groove.
2. the method for monitoring current efficiency of aluminium cell according to claim 1, it specifically comprises the following steps that
1. the determination of tracer element copper: adopting purity to reach the fine copper of more than 99.99% as tracer element, accurately determine the weight showing comprehensive elemental copper, weight error controls within 10%, and copper of weighing is accurate to gram;
2. first time adds copper: first determine this original pattern concentration of copper in aluminum liquid before taking this original pattern, when in aluminum liquid, the concentration of copper is too low, analytical error will be bigger than normal, the part by weight of requirement aluminum liquid and copper is (3.5～4.0): 1, if concentration is too low, first should adding the copper of q.s before taking inventory in sample slot, copper is separately added into from the aluminium flowing-out mouth of sample slot and two mouths of flue end respectively, and this adds copper and within first 24 hours, should carry out taking this original pattern;
3. take background aluminum sample: electrolysis bath takes background aluminum sample to taking inventory groove before adding copper after going out aluminum, respectively takes 3 samples at aluminium flowing-out mouth and floss hole, and records sample time, be accurate to minute;
4. second time adds copper: is added from aluminium flowing-out mouth and floss hole respectively by copper, holds copper billet with iron implements and slowly put into groove, stands about 15 minutes, stir furnace bottom with iron implements, it is to avoid sink to furnace bottom after one hour in aluminum liquid;
5. taking and take inventory sample: after second time adds copper 24 hours, prison determine to take in groove to take inventory sample, respectively takes 3 aluminum samples at aluminium flowing-out mouth and flue end respectively, record sample time, is accurate to minute;
6. primary aluminum sample analysis in groove determine by prison: to the spectrum analysis taking inventory the aluminum sample that takes of front and back and carrying out copper content, and analysis precision is to ppm; Sample after analysis preserves, in order to rechecking;
7. substitute into take inventory in computing formula by sample data and be calculated, try to achieve aluminum amount in the groove of electrolysis bath;
8. the calculating of period aluminum yield is taken inventory: taking inventory natural law t is 90 days, accurately records aluminum yield every day, and aluminum yield weighing precision is accurate to kg; It is take inventory adding up of 90 aluminum yields of period that every sample slot goes out aluminum total amount for 90 days;
9. take inventory period current efficiency to calculate: current efficiency=go out aluminum efficiency+amount to efficiency producing aluminum.
3. the method for monitoring current efficiency of aluminium cell according to claim 2, it is characterised in that: it is described that to take inventory computing formula as follows:
In formula: aluminum amount, units/kg are produced in M groove inherence;
M adds the quality of copper, units/kg;
The purity of k copper;
The product aluminum amount of electrolysis bath in n inventory procedure, units/kg, need to, to electrolytic cell currents efficiency valuation, if sampling interval 24 hours, then be aluminum yield on the same day;
The content of buried copper before taking inventory;
Take inventory the content terminating buried copper;
R casting yield, due to the melting in the electrolyte of tracer element, volatilization loss, generally to have the numerical value of casting yield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139466.9A CN105671595A (en) | 2016-03-10 | 2016-03-10 | Method for monitoring current efficiency of aluminum electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610139466.9A CN105671595A (en) | 2016-03-10 | 2016-03-10 | Method for monitoring current efficiency of aluminum electrolytic cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130261A (en) * | 2017-05-16 | 2017-09-05 | 聊城信源集团有限公司 | A kind of aluminium production monitoring method and system |
| CN110699709A (en) * | 2019-10-10 | 2020-01-17 | 重庆旗能电铝有限公司 | Aluminum yield inventory method for aluminum electrolysis single cell |
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| US4752362A (en) * | 1987-01-27 | 1988-06-21 | Aluminum Company Of America | Detecting and estimating shorting phenomena in hall cells and control of cell anodes in response thereto |
| CN101545119A (en) * | 2009-03-30 | 2009-09-30 | 郑州经纬科技实业有限公司 | Analyzer for current efficiency of aluminium cell |
| CN104164681A (en) * | 2014-07-22 | 2014-11-26 | 山西华泽铝电有限公司 | Novel electrolytic tank in-production aluminum inventory method |
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2016
- 2016-03-10 CN CN201610139466.9A patent/CN105671595A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU595429A1 (en) * | 1976-08-12 | 1978-02-28 | Всесоюзный научно-исследовательский и конструкторский институт "Цветметавтоматика" | Method of monitoring the duration of anode cycle of nickel electrolysers |
| US4752362A (en) * | 1987-01-27 | 1988-06-21 | Aluminum Company Of America | Detecting and estimating shorting phenomena in hall cells and control of cell anodes in response thereto |
| CN101545119A (en) * | 2009-03-30 | 2009-09-30 | 郑州经纬科技实业有限公司 | Analyzer for current efficiency of aluminium cell |
| CN104164681A (en) * | 2014-07-22 | 2014-11-26 | 山西华泽铝电有限公司 | Novel electrolytic tank in-production aluminum inventory method |
Non-Patent Citations (2)
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| 孙志宏等: ""加铜盘存法测算电解槽工艺技术开发实践"", 《有色冶金节能》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130261A (en) * | 2017-05-16 | 2017-09-05 | 聊城信源集团有限公司 | A kind of aluminium production monitoring method and system |
| CN110699709A (en) * | 2019-10-10 | 2020-01-17 | 重庆旗能电铝有限公司 | Aluminum yield inventory method for aluminum electrolysis single cell |
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Application publication date: 20160615 |