CN105386085A - Method for stabilizing continuous production of 400 KA aluminum electrolytic cell - Google Patents
Method for stabilizing continuous production of 400 KA aluminum electrolytic cell Download PDFInfo
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- CN105386085A CN105386085A CN201510813342.XA CN201510813342A CN105386085A CN 105386085 A CN105386085 A CN 105386085A CN 201510813342 A CN201510813342 A CN 201510813342A CN 105386085 A CN105386085 A CN 105386085A
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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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Abstract
The invention provides a method for stabilizing continuous production of a 400 KA aluminum electrolytic cell. The method includes the following steps that firstly, the working voltage of the 400 KA aluminum electrolytic cell is increased to 10 mV to 15 mV, the temperature of the 400 KA aluminum electrolytic cell is 935-940 DEG C, the temperature of the ledge of the cell is 300-350 DEG C, the electrolysis temperature is increased to 939-943 DEG C, and heat insulation of the 400 KA aluminum electrolytic cell is strengthened; secondly, the molecular ratio is controlled to be increased to 2.55-2.60 from 2.45-2.50, and the adding amount of aluminum fluoride is reduced by 20-40 weight percent; thirdly, a discharging NB interval is adjusted, and the concentration of aluminum oxide is reduced to 1.5-2.0%; and fourthly, the automatic control rate of the 400 KA aluminum electrolytic cell is increased to 95-99% from 70-80%, and the effect coefficient of the 400 KA aluminum electrolytic cell is adjusted to be 0.03-0.05 from 0.1. According to the method, the service life of the electrolytic cell is prolonged, energy is saved, production stability of the electrolytic cell is improved, and efficient and stable production of the electrolytic cell is ensured.
Description
Technical field
The invention belongs to electrolytic aluminum energy-saving technique technical field, be specifically related to one and stablize 400KA aluminium cell quantity-produced method.
Background technology
Electrolytic aluminum is as high energy consumption industry, and reducing power consumption is a technology reducing costs of aluminium industry and management objectives all the time.In recent years, country controls more and more tighter to aluminum electrolysis industry, industry access standard is more and more higher, and it is more fierce to compete between enterprise, and many aluminium manufacturers adopt low temperature low voltage production technique one after another for reducing power consumption.Containing a certain amount of lithium salts and sylvite in starting material aluminum oxide powder, along with continuing of electrolytic process, lithium salts, the continuous enrichment of sylvite in electrolyte system, lithium salt content obtains about 4%, potassium salts content obtains 2.5-3%, and electrolyte melt liquidus temperature declines, and superheating temperature increases, electrolyzer emerged in operation groove temperature obviously declines, breeze increases, taking electrolyte amount increases, precipitation increases the abnormal conditions such as cathode drop rising, makes a big impact to electrolysis production.
Summary of the invention
There is provided one to stablize 400KA aluminium cell quantity-produced method to solve prior art problem, the method extends the work-ing life of electrolyzer, and save energy, improves electrolyzer production stability, ensure that electrolyzer high efficiency smooth is produced.
To achieve these goals, the present invention adopts following technical scheme:
The invention provides one and stablize 400KA aluminium cell quantity-produced method, comprise the following steps:
(1) the groove temperature operating voltage of 400KA aluminium cell being improved 10mv to 15mV, 400KA aluminium cell is 935 ~ 940 DEG C, and ledge temperature is 300 ~ 350 DEG C, and electrolysis temperature is increased to 939 ~ 943 DEG C; Insulation is strengthened to 400KA aluminium cell;
(2) control molecular ratio and be increased to 2.55 ~ 2.60 by original 2.45 ~ 2.50, the addition of aluminum fluoride reduces by 20 ~ 40wt%;
(3) adjust blanking NB interval, alumina concentration is down to 1.5 ~ 2.0%;
(4) the automatic inverse amplification factor of 400KA aluminium cell is adjusted to 0.03 ~ 0.05 by the effect coefficient that original 70 ~ 80% are increased to 95 ~ 99%, 400KA aluminium cell by original 0.1.
The concrete measure strengthening being incubated to 400KA aluminium cell in described step (1) is thickeied to 18 ~ 20cm by 12 original ~ 15cm by insulation material.
compared with prior art, the beneficial effect that obtains of the present invention:
1. the present invention improves molecular ratio, reduces superheating temperature.Before not carrying out process optimization, molecular ratio remains on 2.45-2.50, groove temperature 935-940 DEG C, superheating temperature is comparatively large, electrolyzer collapse shell, burn with anger more, taking electrolyte amount is larger, ledge temperature is elevated to 300-350 DEG C by 280-330 DEG C, and local occurs rubescent, there is larger potential safety hazard.For reversing this situation, improving molecular ratio, reducing superheating temperature; Aluminum fluoride addition is by 25 kilograms original, ton aluminium, and reduce to a ton aluminium 15-20 kilogram, molecular ratio brings up to 2.55-2.65 by original 2.45-2.50.Along with the raising of molecular ratio, electrolysis temperature rises to 939-943 DEG C by original 935-940 DEG C, collocation voltage and regular job, electrolyte superheat degree also decreases, the shell that collapses phenomenon of burning with anger is curbed, and taking electrolyte amount obviously declines, and ledge temperature progressively drops to control objectives.
2, gutter voltage, purifying electrolysis matter, realize bath voltage stable with a slight decline.Gao Li, high potassium comparatively lower molecular ratio system electrolyte thickness, breeze divides deviation, and resistance is comparatively large, and calendar operations difficulty is large, easily sends out effect, affects electrolysis production index.After improving molecular ratio, ionogen thickness situation progressively takes a turn for the better, and mobility improves, and breeze can be separated preferably, is convenient to daily cleaning, and one is reduce electrolytic resistance, and two is the dissolvings being conducive to aluminum oxide, and the controlled rate of effect significantly improves.Bath voltage declines about 15mv on stable basis, ton aluminium economize on electricity about 45 degree.
3, the present invention one strengthens the insulation of electrolyzer, makes up the minimizing of voltage drop after heat income, requires that insulation material thickeies 18-20cm by 12-15cm, four bights with under steel pawl along concordant, thickness reaches 25cm; Two is purifying electrolysis matter, mainly strengthens the salvaging of breeze, Reasonable adjustment NB interval, reduces electrolytic resistance; Three is reduce human intervention, improves the controlled rate of electrolyzer; Four is improve change poles quality, and human assistance process bearth precipitation, regular burner hearth, reduces idle power consumption.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but does not limit content of the present invention.
Embodiment
One stablizes 400KA aluminium cell quantity-produced method, comprises the following steps:
(1) the groove temperature operating voltage of 400KA aluminium cell being improved 10mv to 15mV, 400KA aluminium cell is 935 ~ 940 DEG C, and ledge temperature is 300 ~ 350 DEG C, and electrolysis temperature is increased to 939 ~ 943 DEG C; Insulation is strengthened to 400KA aluminium cell;
(2) control molecular ratio and be increased to 2.55 ~ 2.60 by original 2.45 ~ 2.50, the addition of aluminum fluoride reduces by 20 ~ 40wt%;
(3) adjust blanking NB interval, alumina concentration is down to 1.5 ~ 2.0%;
(4) the automatic inverse amplification factor of 400KA aluminium cell is adjusted to 0.03 ~ 0.05 by the effect coefficient that original 70 ~ 80% are increased to 95 ~ 99%, 400KA aluminium cell by original 0.1.
The concrete measure strengthening being incubated to 400KA aluminium cell in described step (1) is thickeied to 18 ~ 20cm by 12 original ~ 15cm by insulation material.
According to need of production, utilize during change poles and process the precipitation that electrolyzer furnace bottom has produced, human assistance process bearth precipitation, regular burner hearth, reduces idle power consumption.
Claims (2)
1. a stable 400KA aluminium cell quantity-produced method, is characterized in that comprising the following steps:
(1) the groove temperature operating voltage of 400KA aluminium cell being improved 10mv to 15mV, 400KA aluminium cell is 935 ~ 940 DEG C, and ledge temperature is 300 ~ 350 DEG C, and electrolysis temperature is increased to 939 ~ 943 DEG C; Insulation is strengthened to 400KA aluminium cell;
(2) control molecular ratio and be increased to 2.55 ~ 2.60 by original 2.45 ~ 2.50, the addition of aluminum fluoride reduces by 20 ~ 40wt%;
(3) adjust blanking NB interval, alumina concentration is down to 1.5 ~ 2.0%;
(4) the automatic inverse amplification factor of 400KA aluminium cell is adjusted to 0.03 ~ 0.05 by the effect coefficient that original 70 ~ 80% are increased to 95 ~ 99%, 400KA aluminium cell by original 0.1.
2. stable 400KA aluminium cell quantity-produced method according to claim 1, is characterized in that: the concrete measure strengthening being incubated to 400KA aluminium cell in described step (1) is thickeied to 18 ~ 20cm by 12 original ~ 15cm by insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510813342.XA CN105386085A (en) | 2015-11-23 | 2015-11-23 | Method for stabilizing continuous production of 400 KA aluminum electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510813342.XA CN105386085A (en) | 2015-11-23 | 2015-11-23 | Method for stabilizing continuous production of 400 KA aluminum electrolytic cell |
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| CN105386085A true CN105386085A (en) | 2016-03-09 |
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| CN201510813342.XA Pending CN105386085A (en) | 2015-11-23 | 2015-11-23 | Method for stabilizing continuous production of 400 KA aluminum electrolytic cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107641819A (en) * | 2017-10-12 | 2018-01-30 | 河南万基铝业股份有限公司 | The electrolysis process that a kind of aluminium cell repairing is restarted |
| CN109023423A (en) * | 2018-07-17 | 2018-12-18 | 甘肃东兴铝业有限公司 | A kind of method of 500kA aluminium cell production high-quality Al99.90 product |
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| CN101260542A (en) * | 2007-11-28 | 2008-09-10 | 河南中孚实业股份有限公司 | Low polar distance energy-saving production method for aluminum electrolysis bath |
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| CN103352238A (en) * | 2013-06-25 | 2013-10-16 | 中国铝业股份有限公司 | Method for improving electrolyte viscosity of aluminum reduction cell |
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2015
- 2015-11-23 CN CN201510813342.XA patent/CN105386085A/en active Pending
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| CN1873057A (en) * | 2006-04-28 | 2006-12-06 | 中国铝业股份有限公司 | Preparation method of lead electrobath for transitting to electrolysis in low termperature |
| CN101260542A (en) * | 2007-11-28 | 2008-09-10 | 河南中孚实业股份有限公司 | Low polar distance energy-saving production method for aluminum electrolysis bath |
| CN102051639A (en) * | 2011-01-30 | 2011-05-11 | 中国铝业股份有限公司 | Method for eliminating crust breaking chip bulge of aluminum cell |
| CN103352238A (en) * | 2013-06-25 | 2013-10-16 | 中国铝业股份有限公司 | Method for improving electrolyte viscosity of aluminum reduction cell |
| CN103397347A (en) * | 2013-06-25 | 2013-11-20 | 中国铝业股份有限公司 | Method for controlling electrolytic tank voltage deviation |
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| 梁学民 等: "《现代铝电解生产技术与管理》", 30 November 2011 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107641819A (en) * | 2017-10-12 | 2018-01-30 | 河南万基铝业股份有限公司 | The electrolysis process that a kind of aluminium cell repairing is restarted |
| CN107641819B (en) * | 2017-10-12 | 2019-11-01 | 河南万基铝业股份有限公司 | A kind of electrolysis process that aluminium cell repairing is restarted |
| CN109023423A (en) * | 2018-07-17 | 2018-12-18 | 甘肃东兴铝业有限公司 | A kind of method of 500kA aluminium cell production high-quality Al99.90 product |
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Address after: Anyang City, Henan province 456561 Luban Linzhou City Canal Economic and Technological Development Zone on the north side of East Avenue Applicant after: LINZHOU LINFENG ALUMINUM AND ELECTRICITY CO., LTD. Address before: Anyang City, Henan Province, Linzhou City, 456571 cross Shuifeng Bao Industrial Zone Applicant before: LINZHOU LINFENG ALUMINUM AND ELECTRICITY CO., LTD. |
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Application publication date: 20160309 |