CN102719854A - Alumina blanking system of aluminum reduction cell - Google Patents
Alumina blanking system of aluminum reduction cell Download PDFInfo
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- CN102719854A CN102719854A CN201210183387XA CN201210183387A CN102719854A CN 102719854 A CN102719854 A CN 102719854A CN 201210183387X A CN201210183387X A CN 201210183387XA CN 201210183387 A CN201210183387 A CN 201210183387A CN 102719854 A CN102719854 A CN 102719854A
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Abstract
The invention belongs to the technical field of aluminum electrolysis, and relates to an alumina blanking system of an aluminum reduction cell. The alumina blanking system comprises an anode, a material tube, a buffering material homogenizing device and a main blanking device, wherein the anode is provided with a gas vent perpendicular to the bottom surface of the anode, and at least one blanking hole communicated with the gas vent; and one end of the buffering material homogenizing device is connected with a blanking opening of the main blanking device, the other end of the buffering material homogenizing device is provided with a plurality of material outlets, and each material outlet is communicated with the blanking hole arranged in the anode through the material tube. The alumina blanking system disclosed by the invention is reasonable in structural design, and realizes in-situ uniform dispersion, efficient preheating, continuous charging and rapid dissolution in the alumina blanking process in the aluminum reduction cell; and when the alumina blanking system is used for the aluminum reduction cell, alumina in the cell is enabled to have stable concentration, good space distribution uniformity, less sediment, a low effect coefficient and small heat balance fluctuation, the comprehensive energy consumption is low, and the service life of the cell is long. The alumina blanking system of the aluminum reduction cell is suitable for industrial application, and can be matched with aluminum reduction cells of various types.
Description
Technical field
The invention discloses a kind of aluminum oxide in aluminum electrolytic bath blanking system; Belong to technical field of aluminum electrolysis.
Background technology
Tradition Hall-Ai Lutefa (Hall-H é roult) aluminum electrolysis process is the unique method of industrial aluminium metallurgy always.In the conventional aluminum electrolyzer, aluminum oxide is added in the melt of aluminium cell as main raw material.The alumina raw material that in electrolyzer, adds; In electrolyte melt, accomplish and disperse and dissolving; The interface that arrives electrode reaction is participated in electrochemical reaction and is reduced the liquid molten aluminum of generation; Aluminium liquid is deposited to the aluminium of formation below dielectric substrate liquid layer owing to density is higher than ionogen, finally leaves aluminium cell as product through step siphon operation.Aluminum oxide transporting and dissolving for keeping the stable reduction electrolyzer energy consumption that reaches of electrolyzer in ionogen all has very significance; Transport and dissolve electrolyzer in bad order for aluminum oxide; Not only can cross the low anode effect (causing energy consumption to raise and discharging PFC greenhouse gases) of bringing out because of the selective oxidation al concn; And can produce localized precipitation because of the untimely dissolving of partially oxidation aluminium; Thereby have a strong impact on the stability of electrolytic process, and then cause energy consumption rising, current efficiency to reduce, even cause electrolyzer normally to move.In addition, the diffusion of aluminum oxide and dissolution process are intensive endothermic processes, significantly reduce so after blanking, often be accompanied by the temperature of ionogen regional area, thereby influence the electrolyzer thermostability, reduce the cell life of electrolyzer.
Before the point feeding technology appearance sixties in 20th century, the blanking of electrolyzer is generally accomplished by artificial intermittent type, and the electrolysis worker carries out the reinforced operation of several in the every workday, and each feeding quantity reaches more than the 100kg.Because each feeding quantity is very big; Cause in the for some time after the blanking that ionogen is local or significantly cooling all occurs; And the reduction of electrolyte temperature further worsens it to the transporting and dissolving power of aluminum oxide, causes partially oxidation aluminium can not in time be transported dissolving and be deposited to bottom land forming deposition.On the one hand sedimentary existence makes cell resistance rise and has changed the trend of the electric current in the aluminium liquid and cause the increase of horizontal current, and then causes the aluminium liquid interface big ups and downs as magnetic fluid; Because the interior oxidation concentration of groove can not accurately be controlled, therefore cause anode effect to take place frequently easily on the other hand, both increased the energy consumption of electrolytic process, discharging contains fluorine contaminant in a large number again.
The point feeding system that grow up the eighties in 20th century, it is made up of groove feeding box and point feeding device.Hopper top communicates with feed line, and raw material is through the through groove feeding box of modern air-transport system.The point feeding device is installed in the lower side of hopper.Form by crust breaker and two parts of blanking device; Or " two-in-one " device that crust breaking and blanking are gathered together; Wherein crust breaker is implemented in and opens a hole on the electrolyzer crust surface, and blanking device is realized the aluminum oxide in its constant volume chamber is discharged in the ionogen through the hole of opening.Point feeding device action is once added a small amount of and quantitative aluminum oxide to electrolyzer, and the typical feeding quantity of each blanking is 0.5-3kg, and usually, normal blanking pitch time is in the scope of 1.5-3min.Because blanking is very short at interval, some blanking technology often is called as " continuously accurate " or " semicontinuous " blanking technology, satisfies the requirement of modern aluminum electrolysis process to alumina concentration control basically.
Increase along with the modern aluminum tank capacity; And Aluminum circle is for pursuing the energy-conservation low pole span technology of carrying out of electrolyzer; The fluctuation of adding part aluminium manufacturer and be aluminium liquid in the restrain tank has taked to weaken the design of melt flow in the groove, and the aluminum oxide that makes the existing continuous baiting method of standard based on point feeding add in the ionogen transports in groove and disperses more and more being difficult to after the blanking; In addition; Existing domestic aluminium cell also also makes the dissolution process difficulty more of aluminum oxide progressively drawing close to the operational path of low temperature low overheat, cause in the groove that the alumina concentration spatial distribution differences is big, fluctuation of concentration comparatively obviously, big, the deposition of groove thermal equilibrium fluctuation and local anode effect happen occasionally.Therefore; For accelerating aluminum oxide transporting, disperseing and dissolving in the ionogen in groove; Thereby forming uniform and stable alumina concentration field, concerning that not only can modern large-scale groove exploitation and new technology route successful, also is an important means that reduces electrolysis energy consumption and pollution simultaneously.
Since the point feeding technology occurs; The designer of aluminium cell and researchist continue to use the mode of this point feeding technology as alumina blanking always; With respect to the material of primary limit subordinate more, the advantage that this point feeding method is had is considered to solve the cutting stock problems of electrolyzer at first.Yet along with the development of aluminum electrolyzation technology, this point feeding method begins to expose problems such as its single blanking amount is still big, poor continuity.Being subject to existing blanking device must install crust-breaking chips and pneumatics thereof and carry out crust breaking operation, alumina material groove upper conveyor etc. and can only arrange this vice proper of extremely limited quantity; The alumina concentration spatial distribution differences is big solving for the design and research personnel, fluctuation of concentration comparatively obviously, the center of gravity of problems such as big, the deposition of groove thermal equilibrium fluctuation and local anode effect concentrated on optimization aluminum electrolytic cell control system, electrolysis process or changed on the groove structure; In the hope of overcoming the above problems, the solution of this basic problem of inherent defect that but never broke through existing blanking system and had.The disclosed content of the present invention promptly is the inherent defect to point feeding system itself, proposes a kind of new blanking system, to promote the solution of the problems referred to above.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide that alumina concentration is stable in a kind of reasonable in design, electric tank working time slot, spatially uniform is good, deposition less, effect coefficient is low, the thermal equilibrium fluctuation is little, comprehensive energy consumption is low, cell life is long aluminum oxide in aluminum electrolytic bath blanking system.
For solving the problems of the technologies described above, a kind of aluminum oxide in aluminum electrolytic bath blanking system of the present invention comprises anode, material pipe, buffering harmonious material device, main blanking device, and said anode is provided with perpendicular to the air slot of anode bottom surface and the blanking hole that is communicated with at least one air slot; One end of said buffering harmonious material device is connected with the feed opening of said main blanking device, and the other end is provided with a plurality of discharge ports, and the logical charge tube of each discharge port is connected with blanking hole on being located at anode.
In a kind of aluminum oxide in aluminum electrolytic bath blanking system of the present invention, said anodic air slot laterally or vertically is provided with perpendicular to the anode bottom surface along anode, and said air slot is the 1-3 bar; The gas that produces during electrolysis can be through said air slot and the blanking hole that is communicated with air slot effusion electrolyzer.
In a kind of aluminum oxide in aluminum electrolytic bath blanking system of the present invention, be connected with a Y-tube on each blanking hole, said Y-tube is made up of straight tube and inclined tube, and the angle of said inclined tube axis and said straight tube axis is 20-70 °; Said blanking hole is a circular hole, and diameter is 15mm-50mm; One end of said material pipe is connected with said inclined tube.
In a kind of aluminum oxide in aluminum electrolytic bath blanking system of the present invention; Said buffering harmonious material device top is connected with main blanking device feed opening; In said buffering harmonious material device, be provided with conical all hoppers, the equal hopper of said taper shape is bored point up, and the awl end is connected with said buffering harmonious material device bottom surface; At the buffering harmonious material device annular bottom surface of the equal hopper awl of said taper shape at the end, be evenly equipped with 2-12 discharge port; Described buffering harmonious material device inner surface is smooth, and whole buffering harmonious material device mounting height should guarantee that bottom the material pipe and the horizontal plane angulation that are connected with discharge port are 20-80 °, can in managing, freely glide with the assurance material.
Blanking system provided by the invention can divide a plurality of area arrangements to overlap in aluminium cell more.
Described anode carbon block bottom is provided with the 1-3 bar along anode air slot laterally or longitudinally, and wherein has at least an air slot to have the blanking hole that is communicated with the anode carbon block upper face.Air slot and blanking hole can be through shaping on common anode, also can be through direct forming after the roasting after the premolding.
Said material pipe is made material should have enough intensity, hardness and toughness, guarantees in use not to fracture or damage because of collision or crooked.Simultaneously it should have plasticity-, so that bending temporarily in use or turn to and do not come off; Its inside pipe wall is smooth, can make aluminum oxide under action of gravity, in pipe, freely glide.
The present invention adopts the alumina blanking system of technique scheme; When being applied to aluminium cell; Utilize the air slot and the blanking hole that are provided with on the anode, directly aluminum oxide is sent in the ionogen of anode bottom, therefore can significantly reduce aluminum oxide transporting and dispersion distance in ionogen; Because it is less from the amount of each blanking hole blanking; Total system makes the reinforced continuous regime that is to material dispersive shock absorption; The blanking hole that particularly is provided with on the anode communicates with electrolyzer, and temperature is very high in the blanking hole, to the abundant preheating of aluminum oxide of flowing through wherein; Thereby the aluminum oxide of institute's blanking can comparatively fast be dissolved in the ionogen under gas blow mixing, and is difficult for forming deposition; Therefore when anode effect took place, aluminum oxide can directly arrive the anode bottom, extinguishing of secondary effects fast.The present invention has overcome point feeding system that the prior art aluminium cell adopted can not well not adapt to the requirement for alumina concentration control of flow characteristics and the electrolysis process of melt in the large-scale aluminum electrolytic cell.Have make that alumina concentration is stable in the electric tank working time slot, spatially uniform is good, deposition less, effect coefficient is low, the thermal equilibrium fluctuation is little, comprehensive energy consumption is low, cell life is long advantage.
In sum, reasonable in design of the present invention, can make when being applied to electrolyzer that alumina concentration is stable in the groove, spatially uniform is good, deposition less, effect coefficient is low, the thermal equilibrium fluctuation is little, comprehensive energy consumption is low, cell life is long.Be suitable for industrial applications, and can use with the matched with aluminium electrolyser of various models.
Description of drawings
Accompanying drawing 1 is the synoptic diagram of the continuous blanking system of a kind of aluminum oxide of the present invention.
Accompanying drawing 2 is structural representations that anode laterally has two air slots among the present invention.
Accompanying drawing 3 is buffering harmonious material device bottom surface vertical views among the present invention.
Among the figure: the 1-anode, 2-master's blanking device, 3-cushions harmonious material device, and 4-expects pipe, 5-Y-tube, 6-blanking hole, 7-air slot.
Embodiment
Below in conjunction with accompanying drawing and embodiment invention is described further.
Referring to accompanying drawing 1,2,3; A kind of aluminum oxide in aluminum electrolytic bath blanking system of the present invention; Comprise anode 1, material pipe 4, buffering harmonious material device 3, main blanking device 2, said anode 1 is provided with perpendicular to the air slot 7 of anode bottom surface and blanking hole 6 that at least one is communicated with air slot 7; One end of said buffering harmonious material device 3 is connected with the feed opening of said main blanking device 2, and the other end is provided with a plurality of discharge ports, and the logical charge tube 4 of each discharge port is connected with blanking hole 6 on being located at anode 1.
In the present embodiment, the air slot 7 of said anode 1 laterally is provided with perpendicular to anode 1 bottom surface along anode 1, and said air slot 7 is 2; The gas that produces during electrolysis can be through said air slot 7 and the blanking hole that is communicated with air slot 76 effusion electrolyzers.
In the present embodiment, be connected with a Y-tube 5 on each blanking hole 6, said Y-tube 5 is made up of straight tube 8 and inclined tube 9, and the angle of said inclined tube 9 axis and said straight tube 8 axis is 20-70 °; Said blanking hole 6 is a circular hole, and diameter is 15mm-50mm; One end of said material pipe 4 is connected with said inclined tube 9.
In the present embodiment, said buffering harmonious material device 3 tops are connected with main blanking device 2 feed openings, in said buffering harmonious material device 3, are provided with conical all hoppers 10, and the equal hopper 10 of said taper shape is bored points up, and the awl end is connected with said buffering harmonious material device 3 bottom surfaces; Buffering harmonious material device 3 annular bottom surfaces beyond at the bottom of equal hopper 10 awls of said taper shape are evenly equipped with 6 discharge ports; Described buffering harmonious material device 3 inner surface are smooth, and whole buffering harmonious material device 3 mounting heights should guarantee that the bottom material pipe that is connected with discharge port 4 is 20-80 ° with the horizontal plane angulation, can in managing, freely glide with the assurance material.
Alumina blanking system applies of the present invention can significantly reduce aluminum oxide transporting and dispersion distance in ionogen in aluminium cell; Because the blanking hole 6 that is provided with on the anode communicates with electrolyzer, temperature is very high in the blanking hole 6, to the abundant preheating of aluminum oxide of flowing through wherein, makes aluminum oxide get into later can comparatively fast be dissolved in the ionogen of ionogen and does not form deposition; When anode effect takes place, can assist fast and extinguish effect.The interior alumina concentration of the electric tank working time slot of this blanking system is stable, spatially uniform is good, precipitate less, effect coefficient is low, the thermal equilibrium fluctuation is little, comprehensive energy consumption is low, cell life is long so adopt.
Claims (4)
1. aluminum oxide in aluminum electrolytic bath blanking system comprises anode, material pipe, buffering harmonious material device, main blanking device, and said anode is provided with perpendicular to the air slot of anode bottom surface and blanking hole that at least one is communicated with air slot; One end of said buffering harmonious material device is connected with the feed opening of said main blanking device, and the other end is provided with a plurality of discharge ports, and the logical charge tube of each discharge port is connected with blanking hole on being located at anode.
2. a kind of aluminum oxide in aluminum electrolytic bath blanking system according to claim 1 is characterized in that: said anodic air slot laterally or vertically is provided with perpendicular to the anode bottom surface along anode, and said air slot is the 1-3 bar.
3. a kind of aluminum oxide in aluminum electrolytic bath blanking system according to claim 1; It is characterized in that: be connected with a Y-tube on each blanking hole; Said Y-tube is made up of straight tube and inclined tube, and the angle of said inclined tube axis and said straight tube axis is 20-70 °; Said blanking hole is a circular hole, and diameter is 15mm-50mm; One end of said material pipe is connected with said inclined tube.
4. a kind of aluminum oxide in aluminum electrolytic bath blanking system according to claim 1; It is characterized in that: said buffering harmonious material device top is connected with main blanking device feed opening; In said buffering harmonious material device, be provided with conical all hoppers; The equal hopper of said taper shape is bored point up, and the awl end is connected with said buffering harmonious material device bottom surface; At the buffering harmonious material device annular bottom surface of the equal hopper awl of said taper shape at the end, be evenly equipped with 2-12 discharge port; Described buffering harmonious material device inner surface is smooth, and material pipe and horizontal plane angulation that buffering harmonious material device discharge port connects are 20-80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210183387.XA CN102719854B (en) | 2012-06-06 | 2012-06-06 | Alumina blanking system of aluminum reduction cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210183387.XA CN102719854B (en) | 2012-06-06 | 2012-06-06 | Alumina blanking system of aluminum reduction cell |
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| CN102719854A true CN102719854A (en) | 2012-10-10 |
| CN102719854B CN102719854B (en) | 2014-11-26 |
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| CN201210183387.XA Expired - Fee Related CN102719854B (en) | 2012-06-06 | 2012-06-06 | Alumina blanking system of aluminum reduction cell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107164783A (en) * | 2017-06-20 | 2017-09-15 | 青海桥头铝电股份有限公司 | A kind of aluminum oxide feeding system |
| CN110359063A (en) * | 2019-09-02 | 2019-10-22 | 中南大学 | A kind of automatic controllable baiting apparatus of aluminium electroloysis |
Citations (5)
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| JPS5943891A (en) * | 1982-09-07 | 1984-03-12 | Nippon Light Metal Co Ltd | Method for supplying alumina into electrolytic cell for aluminum production |
| CN1270239A (en) * | 1999-04-09 | 2000-10-18 | 党建平 | Aluminium electrolyzer anode and its making method |
| CN201317550Y (en) * | 2008-12-17 | 2009-09-30 | 贵阳铝镁设计研究院 | Structure of a blanking hopper on the bin bottom |
| CN102094216A (en) * | 2009-12-11 | 2011-06-15 | 贵阳铝镁设计研究院 | Blanking device of multifunctional electrolyzing unit |
| CN202626312U (en) * | 2012-06-06 | 2012-12-26 | 中南大学 | Aluminum oxide blanking device for aluminum electrolysis cell |
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2012
- 2012-06-06 CN CN201210183387.XA patent/CN102719854B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943891A (en) * | 1982-09-07 | 1984-03-12 | Nippon Light Metal Co Ltd | Method for supplying alumina into electrolytic cell for aluminum production |
| CN1270239A (en) * | 1999-04-09 | 2000-10-18 | 党建平 | Aluminium electrolyzer anode and its making method |
| CN201317550Y (en) * | 2008-12-17 | 2009-09-30 | 贵阳铝镁设计研究院 | Structure of a blanking hopper on the bin bottom |
| CN102094216A (en) * | 2009-12-11 | 2011-06-15 | 贵阳铝镁设计研究院 | Blanking device of multifunctional electrolyzing unit |
| CN202626312U (en) * | 2012-06-06 | 2012-12-26 | 中南大学 | Aluminum oxide blanking device for aluminum electrolysis cell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107164783A (en) * | 2017-06-20 | 2017-09-15 | 青海桥头铝电股份有限公司 | A kind of aluminum oxide feeding system |
| CN107164783B (en) * | 2017-06-20 | 2019-01-08 | 青海桥头铝电股份有限公司 | A kind of aluminium oxide feeding system |
| CN110359063A (en) * | 2019-09-02 | 2019-10-22 | 中南大学 | A kind of automatic controllable baiting apparatus of aluminium electroloysis |
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| CN102719854B (en) | 2014-11-26 |
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Granted publication date: 20141126 Termination date: 20210606 |