CN102296328A - Low temperature control method for aluminum electrolysis - Google Patents
Low temperature control method for aluminum electrolysis Download PDFInfo
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- CN102296328A CN102296328A CN2011101838135A CN201110183813A CN102296328A CN 102296328 A CN102296328 A CN 102296328A CN 2011101838135 A CN2011101838135 A CN 2011101838135A CN 201110183813 A CN201110183813 A CN 201110183813A CN 102296328 A CN102296328 A CN 102296328A
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Abstract
The invention relates to a low temperature control method for aluminum electrolysis. The method is characterized in that: 1, the electrolysis temperature is 930-936DEG C, the mass of lithium carbonate accounts for 2.8-3.0% of the mass of an electrolyte, the molecular ratio of sodium fluoride to aluminum fluoride which are in the electrolyte is 2.3-2.5, and the aluminum level is not less than 26cm; and 2, a coercive thermal insulation measure of an electrolytic tank is that: the bottom and small windows of the electrolytic tank are sealed with an insulation material alumina silicate fiber blanket. By unchanging the equipment facility in aluminum electrolysis production, the method of the invention allows the refined operation to be realized, the stability of the electrolytic tank to be improved, the thermal insulation to be reinforced, the heat loss to be reduced, the electrolysis temperature to be reduced, the current efficiency to be improved, the service life of the electrolytic tank to be prolonged, and the energy saving and emission reduction effect to be substantial by adjusting electrolysis technologies and regulating a hearth, so the method of the present invention provides guarantees for the realization of safety, high efficiency, energy saving and environmental protection of the electrolysis production.
Description
Technical field
The present invention relates to technical field of aluminum electrolysis, is a kind of used for aluminium electrolysis low temperature control method.
Background technology
As the high energy consumption industry, saving energy and reduce the cost becomes current aluminium industry survival strategy.Theoretically, do not change in Aluminium Electrolysis under the situation of installations and facilities, 10 ℃ of current efficiency of the every reduction of temperature will improve 1%.Therefore, explore the low temperature control techniques, improve current efficiency, reduce ton aluminium power consumption, have important and far-reaching meaning.But low temperature control difficulty is bigger, and temperature is low excessively, and the burst effect is more, and ionogen is difficult for keeping, and forms problems such as stove group is blocked up, stretch one's legs excessive, the very easily long bag in angle and precipitation increase, and causes the electrolyzer fluctuation of service, and current efficiency reduces.
Summary of the invention
The objective of the invention is to overcome the problem that prior art exists, a kind of used for aluminium electrolysis low temperature control method is provided, make electrolyzer reach heat balance and material balance, realize cryostatic stabilization production, reduce ton aluminium power consumption, reduce production costs.
The present invention is directed to the problem that prior art exists, analyze and research from the production characteristics of electrolyzer, reasonable disposition technology is sought minimum temperature-controlled process.
Main by combining and configuring control to technology, guaranteeing that electrolyzer steadily, efficiently under the prerequisite, electrolysis temperature is reduced, improves current efficiency, to realize reducing the purpose of ton aluminium power consumption.This project mainly is at the characteristics of electrolyzer production and the problem of existence, by existing technology condition is optimized, take measures such as regular burner hearth, adjustment Quilonum Retard concentration, the aluminium level that improves, reduction molecular ratio are controlled, the electrolyzer pressure is incubated, strengthens operational quality to improve the stability that electrolyzer moves, reduce the heat expenditure, provide favourable condition for realizing temperature production, high current efficiency.
Major technique condition of the present invention is:
1) electrolysis temperature is 930～936 ℃;
2) the Quilonum Retard content in the ionogen is 2.8～3.0%, and the molecule ratio of Sodium Fluoride and aluminum fluoride is 2.3～2.5 in the ionogen; The aluminium level is not less than 26cm.
3) cooperate the pressure of electrolyzer to be incubated measure, bottom land and fenestella adopt the alumina silicate fibre blanket lagging material to seal.
The invention has the beneficial effects as follows:
1, electrolysis temperature has reduced by 20～25 ℃, and current efficiency has improved 1.47%, and ton aluminium direct current consumption reaches below 12000 kwh/t.AL, and level at home is in a leading position in the pre-calcining electrolytic cell.
2, shell temperature and bottom temperature have obtained significantly reducing, improved the security of electrolyzer, prolonged cell life, equipment effectiveness has obtained giving full play to, control to electrolyzer is more safe and reliable, provide guarantee for electrolysis production realizes safe, efficient, energy-saving and environmental protection, effects of energy saving and emission reduction is very remarkable.
3, improve the stability of electrolyzer.At the prevention bath voltage unusual and voltage fluctuation aspect, effect of the present invention is obvious.
The present invention makes the energy-saving and cost-reducing technology of electrolysis of aluminum stride forward major step at the unusual effect of obtaining aspect raising current efficiency and the reduction direct current consumption.Present domestic great majority are implemented the planar cathode electrolytic series of temperature production, current efficiency is difficult to remain on for a long time more than 95%, the planar cathode aluminium cell low temperature control techniques of the present invention's exploitation, for domestic electrolysis of aluminum low temperature control techniques provides the model that can use for reference, has the excellent popularization using value in the electrolysis of aluminum industry.
Embodiment
Embodiment 1:
The aluminium cell electrolysis temperature is set at 936 ℃, and the Quilonum Retard content in the ionogen is ionogen massfraction 2.8%, and the molecule ratio of Sodium Fluoride and aluminum fluoride is 2.5 in the ionogen, and the aluminium level is 26cm.Cooperate the pressure insulation measure of electrolyzer, adopt the alumina silicate fibre blanket lagging material to seal cell bottom and fenestella.Current efficiency 94.91%, direct current consumption 12400kwh/t.AL.
Embodiment 2:
The aluminium cell electrolysis temperature is set at 933 ℃, and the Quilonum Retard content in the ionogen is ionogen massfraction 2.9%, and the molecule ratio of Sodium Fluoride and aluminum fluoride is 2.4 in the ionogen.The aluminium level is 27cm.Cooperate the pressure insulation measure of electrolyzer, adopt the alumina silicate fibre blanket lagging material to seal cell bottom and fenestella.Current efficiency 95.21%, direct current consumption 12240 kwh/t.AL.
Embodiment 3:
The aluminium cell electrolysis temperature is set at 930 ℃, and the Quilonum Retard content in the ionogen is 3% of ionogen massfraction, and the molecule ratio of Sodium Fluoride and aluminum fluoride is 2.3 in the ionogen, the horizontal 28cm of aluminium.Cooperate the pressure insulation measure of electrolyzer, adopt the alumina silicate fibre blanket lagging material to seal cell bottom and fenestella.Current efficiency 95.69%, direct current consumption 11878kwh/t.AL.
Through above-mentioned enforcement, the groove temperature of electrolyzer declines to a great extent, and electrolyzer is realized cryostatic stabilization production, the long phenomenon of stretching one's legs the angle utmost point obviously reduces, precipitation in the electrolyzer, crust reduce, and type has had before than adjusting process and is clearly better in the burner hearth, can satisfy the needs of temperature production preferably.
Claims (1)
1. used for aluminium electrolysis low temperature control method is characterized in that:
1) electrolysis temperature during electrolysis is 930～936 ℃, and the Quilonum Retard content in the ionogen is 2.8～3.0% of ionogen massfraction, and the molecule ratio of Sodium Fluoride and aluminum fluoride is 2.3～2.5 in the ionogen; The aluminium level is not less than 26 cm;
2) pressure of electrolyzer insulation measure: bottom land and fenestella adopt the alumina silicate fibre blanket lagging material to seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101838135A CN102296328A (en) | 2011-07-01 | 2011-07-01 | Low temperature control method for aluminum electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101838135A CN102296328A (en) | 2011-07-01 | 2011-07-01 | Low temperature control method for aluminum electrolysis |
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| CN102296328A true CN102296328A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101838135A Pending CN102296328A (en) | 2011-07-01 | 2011-07-01 | Low temperature control method for aluminum electrolysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184475A (en) * | 2011-12-31 | 2013-07-03 | 湖南晟通科技集团有限公司 | Control method for clearing up furnace hearth of aluminum cell |
| CN113502508A (en) * | 2021-08-10 | 2021-10-15 | 内蒙古霍煤鸿骏铝电有限责任公司 | Control method for efficient production of aluminum electrolysis cell |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974863A (en) * | 2006-12-08 | 2007-06-06 | 中国铝业股份有限公司 | Aluminium electrolyzing process |
| CN101709486A (en) * | 2009-12-18 | 2010-05-19 | 中国铝业股份有限公司 | Aluminium electrolysis bath |
-
2011
- 2011-07-01 CN CN2011101838135A patent/CN102296328A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974863A (en) * | 2006-12-08 | 2007-06-06 | 中国铝业股份有限公司 | Aluminium electrolyzing process |
| CN101709486A (en) * | 2009-12-18 | 2010-05-19 | 中国铝业股份有限公司 | Aluminium electrolysis bath |
Non-Patent Citations (1)
| Title |
|---|
| 张泉林等: "铝电解生产工艺改进实践", 《轻金属》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184475A (en) * | 2011-12-31 | 2013-07-03 | 湖南晟通科技集团有限公司 | Control method for clearing up furnace hearth of aluminum cell |
| CN103184475B (en) * | 2011-12-31 | 2016-09-28 | 晟通科技集团有限公司 | A kind of control method of the regular burner hearth of aluminium cell |
| CN113502508A (en) * | 2021-08-10 | 2021-10-15 | 内蒙古霍煤鸿骏铝电有限责任公司 | Control method for efficient production of aluminum electrolysis cell |
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| ASS | Succession or assignment of patent right |
Owner name: YUNNAN ALUMINUM ELECTROLYTIC ENERGY SAVING AND EMI Effective date: 20140814 |
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Effective date of registration: 20140814 Address after: 654302 Yunnan Province Honghe Hani and Yi Autonomous Prefecture of Ling'an Jianshui County town of Zhuang Zihe dam Applicant after: Yunnan Yunlyu Runxin Aluminum Co., Ltd. Applicant after: Yunnan Province's aluminium electroloysis energy-saving and emission-reduction Engineering Technical Research Centre Address before: 654302 Yunnan Province Honghe Hani and Yi Autonomous Prefecture of Ling'an Jianshui County town of Zhuang Zihe dam Applicant before: Yunnan Yunlyu Runxin Aluminum Co., Ltd. |
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Application publication date: 20111228 |