CN103114305A - Continuous feeding device for aluminum electrolysis cell and electrolysis cell with same - Google Patents
Continuous feeding device for aluminum electrolysis cell and electrolysis cell with same Download PDFInfo
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- CN103114305A CN103114305A CN2013100437485A CN201310043748A CN103114305A CN 103114305 A CN103114305 A CN 103114305A CN 2013100437485 A CN2013100437485 A CN 2013100437485A CN 201310043748 A CN201310043748 A CN 201310043748A CN 103114305 A CN103114305 A CN 103114305A
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- transfer lime
- level switch
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- blanking device
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Abstract
The invention belongs to the technical field of aluminum electrolysis cells, and particularly relates to a continuous feeding device for an aluminum electrolysis cell and an electrolysis cell with the same. The continuous feeding device for the aluminum electrolysis cell is capable of improving the stability of the electrolysis cell, lowering energy consumption, reducing sediment and pressure drop at the furnace bottom and prolonging the service life of the cell. According to the technical scheme, the continuous feeding device for the aluminum electrolysis cell comprises a sleeve, a funnel and an upper delivery pipe, wherein the open end of the funnel is fixedly connected with the bottom of the sleeve; and the outlet end of the funnel is fixedly connected with one end of the upper delivery pipe. Since the funnel is arranged at the bottom of the sleeve, so that the flow velocity of fed materials can be reduced, continuous feeding is realized, and the problem caused when alumina powder which is not completely dissolved sinks into the aluminum liquid is avoided.
Description
Technical field
The invention belongs to the aluminium cell technical field, relate in particular to a kind of aluminum electrolyzing cell used continuous blanking device and reach
The electrolyzer that comprises this blanking device.
Background technology
The point feeding technology is formed at the 80's of last century, compares point type with traditional limit subordinate's material technology
The blanking technology has plurality of advantages.But, along with the appearance of low pole span technology with to suppress aluminium fluid wave in electrolyzer
Moving is the appearance of the electrolyzer of purpose, makes by the aluminum oxide under the point feeding technology more and more to be difficult in groove
Transport and disperse; Simultaneously, the operational path of low overheat also makes the dissolution process of aluminum oxide more difficult,
Cause in groove that the alumina concentration spatial distribution differences is large, fluctuation of concentration comparatively obviously, the fluctuation of groove thermal equilibrium is large,
Precipitation and local anode effect happen occasionally.So far, the drawback of point feeding technology also highlights gradually: point type
Baiting method begins to expose the still problem such as large, poor continuity of its single discharge quantity.
Existing aluminum oxide point feeding system and device adopts regularly, and constant-volume blanking device carries out the compartment blanking.This
It is the compartment blanking that cutting mode exists following shortcoming: a, cutting mode, and the alumina concentration fluctuation is obvious, under
Before material, concentration is low, and after blanking, concentration is high, and the fluctuation of groove thermal equilibrium is large, affects stability and the electric current effect of electrolyzer
Rate; B, point feeding mode single are lowered to a large amount of aluminum oxide, and the low overheat operational path that adopts at present makes
The dissolution process that gets aluminum oxide is more difficult, and undissolved aluminum oxide sinks to aluminium liquid, causes under feed opening like this
Pile up a large amount of precipitation of alumina in side's aluminium liquid layer, precipitation causes furnace bottom to press along with the mobile covering furnace bottom of aluminium liquid
Falling-rising is high, and energy consumption increases, and severe patient can cause lopsided burner hearth, and shorten bath life.
If adopt the continuous blanking of aluminum oxide, can eliminate bearth precipitation, reduce the alumina concentration fluctuation, improve electricity
Stream efficient.Patent CN200810167576.1 has invented a kind of pre-calcining electrolytic cell and has filled with the aluminum oxide continuous charging
Put, its structure is the alumina powder spray tube to be set on pot superstructure promote Fluctuation Device, makes oxidation
Aluminium powder material spray tube communicates with ionogen, according to the variation of alumina concentration in ionogen, by slot control machine
Pressure, flux and the flow velocity that alumina powder is carried regulated in instruction, makes aluminum oxide by transport pipe and injection
Pipe, continuous is injected in ionogen.The drawback of this feeding device is: be difficult at present find anti-for a long time
The spray tube material of high-temperature electrolysis matter corrosion, the industrialization cost is high.
Patent US256154 has invented a kind of continuous feeding device for alumina, and its core is to allow the aluminum oxide Continuous Flow
Cross a cylindrical hole, the conical roller of constant slope is housed in the middle of the hole.Control conical rollers by cylinder
Son moving up and down in the middle of the cylindrical hole regulated the flow through size of cylindrical cavity of aluminum oxide, controls oxidation
The flow of aluminium.The shortcoming of this invention is: when aluminum oxide grain size changes, and aluminum oxide flow velocity and looping pit
The linear relationship of size changes, and flow rate control and error in dipping are larger.
Summary of the invention
Problem to be solved by this invention is to provide the aluminum electrolyzing cell used continuous blanking device of a kind of aluminium, to improve electricity
Separate the stability of groove, reduce energy consumption, reduce bearth precipitation, reduce the furnace bottom pressure drop, improve cell life.
In order to address the above problem, the technical scheme that the present invention will provide is:
A kind of aluminum electrolyzing cell used continuous blanking device comprises sleeve, also comprises funnel and upper conveying
Pipe, described funnel opening end is fixedly connected with bottom sleeve, and described hopper outlet end and upper transfer lime one end are solid
The fixed connection.After sleeve bottom installation funnel, can reduce the conveying flow velocity of material, thereby realize continuously
Blanking.Existing cutting mode is disposable a large amount of blanking, and due to the dissolution rate of ionogen to aluminum oxide
And unhappy, aluminum oxide does not dissolve fully and sinks to aluminium liquid at dielectric substrate, and aluminium liquid can not dissolved oxygen aluminium,
Cause like this and pile up a large amount of precipitation of alumina under feed opening in the aluminium liquid layer, cause the furnace bottom pressure drop to raise, energy
Consumption increases, and severe patient can cause lopsided burner hearth, and cell life reduces, and blanking can be so that material one continuously
Dissolving on one side under the limit, the new problem of avoiding the aluminum oxide powder to dissolve fully namely sinking to aluminium liquid and therefore cause.
Optionally, described upper transfer lime is U shape transfer lime, or V shape transfer lime, U shape transfer lime and V
There is an opening for feed centre of shape transfer lime, is connected with the funnel bottom opening, and U shape transfer lime and V shape are carried
Two discharge ports of pipe can be two feed opening blankings simultaneously, have both reduced cost, have increased again in groove empty
Between, U shape transfer lime and V shape transfer lime can also guarantee that blanking is unobstructed.
Optionally, described continuous blanking device also comprises lower transfer lime, and described lower transfer lime is that U shape is defeated
Send pipe, or V shape transfer lime, there is an opening for feed centre of U shape transfer lime and V shape transfer lime, with upper defeated
Send Guan Yiduan to be fixedly connected with.Funnel bottom is installed 1 U shape transfer lime or V shape transfer lime, and two oxygen are arranged
Change the aluminium outlet, then U shape transfer lime or V shape transfer lime exit end install 1 or 2 U shape transfer limes and
/ or V shape transfer lime, can be namely 3 or 4 feed opening blankings simultaneously, both reduced cost, increase again
Space in groove, U shape transfer lime and V shape transfer lime can also guarantee that blanking is unobstructed.
Optionally, described blanking device also comprises stuff level switch and rly., and described stuff level switch is used for surveying
Material level in the amount funnel, institute's stuff level switch is connected with slot control machine by rly..In order to ensure fracture not occurring
Phenomenon must be to supplemental aluminium in funnel, thus a stuff level switch is installed in funnel, in funnel
Material level is during lower than the stuff level switch installation site, and stuff level switch returns to a signal to slot control machine, and slot control machine sends
Next defective material of signal control blanking cylinder keeps continuous feeding, thereby guarantees the continuity of blanking;
Optionally, described stuff level switch is radio frequency admittance material level indicator, tuning-fork type level switch, bar type shakes
Stuff level switch, Anti-rotation type material level switch, static capacity stuff level switch, resistance move the formula stuff level switch, in stuff level switch
Any one.
Optionally, described blanking device also comprises at least 1 variable valve, the valve peace of described variable valve
Be contained on transfer lime and/or lower transfer lime, the topworks of variable valve is connected with slot control machine.The slot control machine basis
The cell resistance signal determining alumina concentration that gathers whether in optimum concentration range, if NO, output
4～20mA signal is to the topworks of variable valve, and topworks transfers valve opening according to signal
Whole, after adjusting end, continue to judge according to the cell resistance that gathers whether alumina concentration adjusts to the right place, if
To finish; If NO, return to continuation adjustment.Variable valve is guaranteeing the successional while of blanking, control
Made discharge quantity, promoted the accuracy of blanking, accomplished " as required supply with ", thoroughly solved and do not connect because of blanking
The problem that the factors such as continuous, excessive blanking, the amount of owing blanking cause.
The present invention also provides a kind of electrolyzer, and described electrolyzer comprises aforesaid any one continuous blanking
Device.
The invention has the beneficial effects as follows: 1. after sleeve bottom installation funnel, can fall
Low by the flow velocity of lower material, thus realize continuous blanking.Due to ionogen to the dissolution rate of aluminum oxide not
Hurry up, aluminum oxide does not dissolve fully and sinks to aluminium liquid at dielectric substrate, and aluminium liquid can not dissolved oxygen aluminium, this
Sample causes piles up a large amount of precipitation of alumina under feed opening in the aluminium liquid layer, cause the furnace bottom pressure drop to raise, and increases
Energy consumption, severe patient can cause lopsided burner hearth, continuously blanking can so that material while under dissolve,
The new problem of avoiding the aluminum oxide powder to dissolve fully namely sinking to aluminium liquid and therefore causing.2. funnel bottom installs 1
Individual U shape transfer lime or V shape transfer lime have two aluminum oxide outlets, more defeated at U shape transfer lime or V shape
Send the pipe exit end that 1 or 2 U shape transfer limes and/or V shape transfer lime are installed, can be simultaneously namely 3 or
4 feed opening blankings had both reduced cost, had increased again space, U shape transfer lime and V shape transfer lime in groove
Can also guarantee that blanking is unobstructed.3. in order to ensure the fracture phenomenon not occurring, must be to supplemental aluminium in funnel,
Therefore a stuff level switch is installed in funnel, when the material level in funnel during lower than the stuff level switch installation site, material
Bit switch returns to a signal to slot control machine, and slot control machine sends next defective material of signal control blanking cylinder, keeps
Continuous feeding, thereby the continuity of assurance blanking; 4. set up variable valve, make guaranteeing that blanking is successional same
The time, controlled discharge quantity, promoted the accuracy of blanking, accomplish " as required supply with ", thoroughly solved because of under
Expect the problem that the factors such as discontinuous, excessive blanking, the amount of owing blanking cause.5. the present invention can guarantee that aluminum oxide is continuous
Constantly enter in ionogen, reduce alumina concentration fluctuation in electrolyzer, improve 1% current efficiency.With
The time, can reduce the bearth precipitation that existing once a large amount of blankings cause, reduce approximately 20mv of furnace bottom pressure drop.
Description of drawings
The existing aluminum cell supplying system schematic that Fig. 1 is comprised of 4 blanking devices
Fig. 2 is the aluminum cell supplying device after improving
Description of reference numerals: transfer lime 4 funnel 5 variable valve on 1 sleeve 2 slot control machines 3
6 stuff level switch
Embodiment
In order fully to disclose technology contents of the present invention, give clear, simple below in conjunction with the embodiment of the best
The description of wanting.What need to again emphasize is that technical scheme disclosed in this invention is of the present invention best real
Execute mode, rather than all, and those skilled in the art are apparent in conjunction with the present invention and prior art
The technical scheme obtained still belong to protection scope of the present invention.
A kind of aluminum electrolyzing cell used continuous blanking device comprises sleeve 1, also comprises funnel 4 and upper transfer lime, institute
State the funnel opening end and be fixedly connected with sleeve 1 bottom, described hopper outlet end and upper transfer lime 3 one ends are fixed
Connect.After sleeve bottom installation funnel, can reduce by the flow velocity of lower material, thereby under realizing continuously
Material.Existing cutting mode is disposable a large amount of blanking, and due to ionogen to the dissolution rate of aluminum oxide also
Unhappy, aluminum oxide does not dissolve fully and sinks to aluminium liquid at dielectric substrate, and aluminium liquid can not dissolved oxygen aluminium,
Cause like this and pile up a large amount of precipitation of alumina under feed opening in the aluminium liquid layer, cause the furnace bottom pressure drop to raise, increase
Add energy consumption, severe patient can cause lopsided burner hearth, continuously blanking can so that material while under dissolve,
The new problem of avoiding the aluminum oxide powder to dissolve fully just sinking to aluminium liquid and therefore causing.Aluminum oxide is successive
Enter in ionogen, reduce alumina concentration fluctuation in electrolyzer, improve 0.2% current efficiency.Simultaneously,
Can reduce the bearth precipitation that existing once a large amount of blankings cause, reduce approximately 8mv of furnace bottom pressure drop.
Embodiment 2
On the basis of embodiment 1, can also improve transfer lime 1, described upper transfer lime is U
Shape transfer lime, or V shape transfer lime, there is an opening for feed centre of U shape transfer lime and V shape transfer lime, with leakage
The bucket bottom opening connects, and two discharge ports of U shape transfer lime and V shape transfer lime can be two feed openings simultaneously
Blanking had both reduced cost, had increased again space in groove, and U shape transfer lime and V shape transfer lime can also guarantee
Blanking is unobstructed.Aluminum oxide continuously enters in ionogen, reduces alumina concentration fluctuation in electrolyzer,
Improve 0.4% current efficiency.Simultaneously, can reduce the bearth precipitation that existing once a large amount of blankings cause, reduce
The furnace bottom pressure drop is 12mv approximately.
On the basis of enforcement 1 or 2, do following improvement, described continuous blanking device also comprises lower defeated
Send pipe, described lower transfer lime is U shape transfer lime, or V shape transfer lime, connects with upper transfer lime one end is fixing
Connect.Funnel bottom is installed 1 U shape transfer lime or V shape transfer lime, and two aluminum oxide outlets are arranged, then at U
Shape transfer lime or 1 or 2 U shape transfer limes of V shape transfer lime exit end installation and/or V shape transfer lime, namely
Can be 3 or 4 feed opening blankings simultaneously, both reduce cost, increase again space in groove, U shape be defeated
Send pipe and V shape transfer lime can also guarantee that blanking is unobstructed.Aluminum oxide continuously enters in ionogen, subtracts
In few electrolyzer, the alumina concentration fluctuation, improve 0.6% current efficiency.Simultaneously, can reduce existing once large
The bearth precipitation that the amount blanking causes reduces approximately 15mv of furnace bottom pressure drop.
On embodiment 1,2 or 3 basis, do following improvement, described blanking device comprises that also material level opens
Device is connected connection with slot control machine.In order to ensure the fracture phenomenon not occurring, must be to supplemental aluminium in funnel, therefore
A stuff level switch is installed in funnel, when the material level in funnel during lower than the stuff level switch installation site, material level
Switch returns to a signal to slot control machine, and slot control machine sends next defective material of signal control blanking cylinder, keeps connecting
Continuous feed, thereby the continuity of assurance blanking.Described stuff level switch is radio frequency admittance material level indicator, tuning fork
Formula stuff level switch, the bar type stuff level switch that shakes, Anti-rotation type material level switch, static capacity stuff level switch, resistance move the formula material
Bit switch, any one in stuff level switch.Aluminum oxide continuously enters in ionogen, reduces electrolysis
In groove, the alumina concentration fluctuation, improve 0.8% current efficiency.Simultaneously, can reduce existing once a large amount of blankings
The bearth precipitation that causes reduces approximately 18mv of furnace bottom pressure drop.
Embodiment 5
On embodiment 1,2,3 or 4 basis, do following improvement, described blanking device also comprises
At least 1 variable valve 5, the valve installation of described variable valve is transferred on upper transfer lime and/or lower transfer lime
The topworks of joint valve is connected with slot control machine 2.Variable valve is guaranteeing the successional while of blanking, has controlled time
The material amount has promoted the accuracy of blanking, accomplishes " supplying with as required ", has thoroughly solved, mistake discontinuous because of blanking
The problem that the factors such as amount blanking, the amount of owing blanking cause.Aluminum oxide continuously enters in ionogen, reduces
In electrolyzer, the alumina concentration fluctuation, improve 1% current efficiency.Simultaneously, can reduce existing once a large amount of under
The bearth precipitation that material causes reduces approximately 20mv of furnace bottom pressure drop.
Claims (7)
1. an aluminum electrolyzing cell used continuous blanking device, comprise sleeve, it is characterized in that, also comprises funnel and upper defeated
Send pipe, described funnel opening end is fixedly connected with bottom sleeve, described hopper outlet end and upper transfer lime one end
Be fixedly connected with.
2. described a kind of aluminum electrolyzing cell used continuous blanking device according to claim 1, is characterized in that, and is described
Upper transfer lime is U shape transfer lime, or V shape transfer lime.
3. described a kind of aluminum electrolyzing cell used continuous blanking device according to claim 2, is characterized in that, and is described
Continuous blanking device also comprises lower transfer lime, and described lower transfer lime is U shape transfer lime, or V shape transfer lime,
Be fixedly connected with upper transfer lime one end.
4. described a kind of aluminum electrolyzing cell used continuous blanking device according to claim 3, is characterized in that, described under
Materials device also comprises stuff level switch and rly., and described stuff level switch is used for measuring the material level of funnel, institute
Stating stuff level switch is connected with slot control machine by rly..
5. described a kind of aluminum electrolyzing cell used continuous blanking device according to claim 4, is characterized in that, and is described
Stuff level switch is radio frequency admittance material level indicator, tuning-fork type level switch, the bar type stuff level switch that shakes, blocking rotary type material
Bit switch, static capacity stuff level switch, resistance move formula stuff level switch, any one in stuff level switch.
6. described a kind of aluminum electrolyzing cell used continuous blanking device according to claim 5, is characterized in that, described under
Materials device also comprises at least 1 variable valve, and the valve installation of described variable valve is at upper transfer lime and/or lower defeated
Send on pipe, the topworks of variable valve is connected with slot control machine.
7. an electrolyzer, is characterized in that, described electrolyzer comprise claim 1 to 5 described any one
Continuous blanking device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310043748.5A CN103114305B (en) | 2013-02-04 | 2013-02-04 | A kind of aluminum electrolyzing cell used continuous blanking device and use the electrolysis bath of this blanking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310043748.5A CN103114305B (en) | 2013-02-04 | 2013-02-04 | A kind of aluminum electrolyzing cell used continuous blanking device and use the electrolysis bath of this blanking device |
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| CN103114305A true CN103114305A (en) | 2013-05-22 |
| CN103114305B CN103114305B (en) | 2016-08-17 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774182A (en) * | 2014-02-26 | 2014-05-07 | 湖南省科技发展中心 | Method for fabricating high-temperature preheating aluminum oxide progressive-blanking system by using foamed aluminum material |
| CN105420759A (en) * | 2016-01-08 | 2016-03-23 | 湖南创元铝业有限公司 | Aluminum electrolysis cell feeding system and aluminum electrolysis cell system |
| CN105506675A (en) * | 2016-01-28 | 2016-04-20 | 湖南创元铝业有限公司 | Continuous aluminum oxide blanking device |
| CN105586610A (en) * | 2016-01-08 | 2016-05-18 | 湖南创元铝业有限公司 | Blanking system of electrolytic tank and electrolytic tank system |
| CN105671594A (en) * | 2016-01-12 | 2016-06-15 | 湖南创元铝业有限公司 | Continuous aluminum oxide feeding equipment |
| CN106319573A (en) * | 2016-11-07 | 2017-01-11 | 中国铝业股份有限公司 | Dischargingmethod for aluminum oxide of aluminum electrolysis cell |
| CN106868547A (en) * | 2017-02-15 | 2017-06-20 | 中南大学 | A kind of aluminium electroloysis whirlwind distribution alumina blanking system |
| CN110359063A (en) * | 2019-09-02 | 2019-10-22 | 中南大学 | A kind of automatic controllable baiting apparatus of aluminium electroloysis |
| CN114645298A (en) * | 2020-12-18 | 2022-06-21 | 国家电投集团黄河上游水电开发有限责任公司 | Aluminum oxide distributing device and distributing method |
| CN116240586A (en) * | 2023-04-04 | 2023-06-09 | 北京华索科技股份有限公司 | Aluminum oxide continuous blanking device and method for aluminum electrolysis cell |
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| DE2906903B1 (en) * | 1979-01-19 | 1980-07-31 | Alusuisse | Covering a breakthrough in the crust used for alumina feed in an electrolysis cell |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774182A (en) * | 2014-02-26 | 2014-05-07 | 湖南省科技发展中心 | Method for fabricating high-temperature preheating aluminum oxide progressive-blanking system by using foamed aluminum material |
| CN103774182B (en) * | 2014-02-26 | 2016-03-02 | 湖南省科技发展中心 | A kind of foamed aluminum materials makes the method for the continuous blanking system of high temperature preheating aluminum oxide |
| CN105420759A (en) * | 2016-01-08 | 2016-03-23 | 湖南创元铝业有限公司 | Aluminum electrolysis cell feeding system and aluminum electrolysis cell system |
| CN105586610A (en) * | 2016-01-08 | 2016-05-18 | 湖南创元铝业有限公司 | Blanking system of electrolytic tank and electrolytic tank system |
| CN105671594A (en) * | 2016-01-12 | 2016-06-15 | 湖南创元铝业有限公司 | Continuous aluminum oxide feeding equipment |
| CN105506675A (en) * | 2016-01-28 | 2016-04-20 | 湖南创元铝业有限公司 | Continuous aluminum oxide blanking device |
| CN106319573A (en) * | 2016-11-07 | 2017-01-11 | 中国铝业股份有限公司 | Dischargingmethod for aluminum oxide of aluminum electrolysis cell |
| CN106319573B (en) * | 2016-11-07 | 2019-05-24 | 中国铝业股份有限公司 | A kind of alumina blanking method of aluminium cell |
| CN106868547A (en) * | 2017-02-15 | 2017-06-20 | 中南大学 | A kind of aluminium electroloysis whirlwind distribution alumina blanking system |
| CN110359063A (en) * | 2019-09-02 | 2019-10-22 | 中南大学 | A kind of automatic controllable baiting apparatus of aluminium electroloysis |
| CN114645298A (en) * | 2020-12-18 | 2022-06-21 | 国家电投集团黄河上游水电开发有限责任公司 | Aluminum oxide distributing device and distributing method |
| CN116240586A (en) * | 2023-04-04 | 2023-06-09 | 北京华索科技股份有限公司 | Aluminum oxide continuous blanking device and method for aluminum electrolysis cell |
| CN116240586B (en) * | 2023-04-04 | 2023-11-10 | 北京华索科技股份有限公司 | Aluminum oxide continuous blanking device and method for aluminum electrolysis cell |
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