CN201358306Y - Novel energy-saving aluminum electrolysis bath with chamfered and grooved cathode - Google Patents
Novel energy-saving aluminum electrolysis bath with chamfered and grooved cathode Download PDFInfo
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- CN201358306Y CN201358306Y CNU2009200631450U CN200920063145U CN201358306Y CN 201358306 Y CN201358306 Y CN 201358306Y CN U2009200631450 U CNU2009200631450 U CN U2009200631450U CN 200920063145 U CN200920063145 U CN 200920063145U CN 201358306 Y CN201358306 Y CN 201358306Y
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Abstract
A novel energy-saving aluminum electrolysis bath with a chamfered and grooved cathode is characterized in that a cathode block adopted by the electrolysis bath is a novel chamfered and grooved carbon block. The upper part of the cross section of the carbon block has the shape of a trapezoid, a through rectangular groove is formed on the upper middle surface of the longitudinal section transversely, and the entire cathode surface at the bottom part of the electrolysis bath has the shape that a plurality of trapezoidal grooves and a rectangular groove are crossed straight. The novel energy-saving electrolysis bath can not only enable the electric current density distribution of aluminum liquid, the cathode block and a steel bar to be more uniform, but also improve the uniform distribution of the magnetic field, reduce both the stress generated by virtue of magnetic field function to the aluminum liquid and the flow rate of the aluminum liquid, change the flow pattern of the aluminum liquid, transform the turbulent flow into layer flow and retard the fluctuation of the electrolyte and the aluminum liquid inside the bath, thereby reducing polar distance and bath pressure drop and realizing electrolysis energy conservation and consumption reduction.
Description
Technical field
The utility model belongs to the aluminum electrolysis technology field, is specifically related to a kind of novel energy-saving aluminum cell with chamfering grooving cathode.
Background technology
At present, the direct current consumption of international large-scale pre-baked cell aluminium per ton has dropped to about 13000Kwh, but differs greatly apart from theoretical power consumption, and capacity usage ratio is less than 50% also.Constantly explore new technology and realize energy-saving and cost-reducing not only help save energy and minimizing pollution, can also reduce enterprise's production cost, improve the market competitiveness of enterprise.Therefore, the energy-saving and cost-reducing main direction that remains modern Chinalco.
Current efficiency is brought up to more than 96% and direct current consumption is reduced to and has become the struggle of international Aluminum circle direction below the 12800Kwh/t-Al.Ton aluminium direct current consumption is decided by two factors, the one, and bath voltage, the 2nd, current efficiency, the reduction of bath voltage and the raising of current efficiency can both make ton aluminium power consumption reduce.So can be by reducing bath voltage and improving current efficiency and reduce a ton aluminium direct current consumption.
In electrolytic process, V
Work=E+V
Anode+ V
Ionogen+ V
Negative electrode+ V
Bus+ V
Contact, wherein there is bigger compression space in the ionogen pressure drop, and the height of it and pole span has directly and gets in touch.Data shows, when pole span is 4.5cm, when electrolyte voltage was 1.6V, the every reduction of pole span 1mm can reduce electrolyte voltage and fall 33.6mV, was equivalent to direct current consumption and reduced about 100Kwh/t-Al.Current electrolysis slot number distance generally remains on 4.0～5.0cm, and has data to show, if the aluminium fluid wave is moving can further to be reduced, pole span can be reduced to below the 3.0cm, also can reduce the secondary oxidation of aluminium simultaneously, improves current efficiency.Therefore, do not influencing electrolyzer thermal equilibrium, guaranteeing suitably to dwindle pole span by reducing the fluctuation of aluminium liquid under the non-oscillatory situation of bath voltage, reducing the ionogen pressure drop, thereby cut down the consumption of energy.
Adopt sodium aluminum fluoride-alumina molten salt electrolysis method to produce traditional electrolyzer of metallic aluminium, the distribution of current inequality of ubiquity aluminium liquid, cathode block, cathode steel bar, this not only makes cathode block have the localized hyperthermia district, cause electrolyzer early damage to occur or bath life too short, and the skewness of electric current, also can cause the DISTRIBUTION OF MAGNETIC FIELD inequality, thereby cause mobile turbulent flow, fluctuation and the unsettled adverse consequences of groove condition of occurring of aluminium liquid.Cause that owing to the distribution of current of aluminium liquid, cathode block, cathode steel bar is uneven it is the one of the main reasons that traditional electrolysis slot number distance and bath voltage are difficult to continue reduction that the aluminium fluid wave moves excessive.
Summary of the invention
At the sodium aluminum fluoride of present employing-alumina molten salt electrolysis method produce that the metallic aluminium electrolyzer occurs generally that the aluminum liquid horizontal electric current is big, cathode block and cathode steel bar distribution of current inequality so that the aluminium fluid wave that produces is moving excessive, pole span can't continue to reduce, bath voltage is much larger than problems such as theoretical voltage, cathode block local superheating, electrolyzer early damages.The utility model has overcome the deficiencies in the prior art, a kind of novel energy-saving aluminum cell with chamfering grooving cathode is provided, comprise paste between cathode block, charcoal, cathode steel bar and rod iron paste, it is characterized in that described cathode block is the novel carbon piece through chamfering and fluting, its cross section top is trapezoidal, and middle part, vertical section upper surface connects rectangular tank along laterally opening one.
The utility model is achieved through the following technical solutions:
A kind of novel energy-saving aluminum cell with chamfering grooving cathode comprises paste between cathode block, charcoal, cathode steel bar and rod iron paste.
When 1) making cathode block, make cathode block cross section top be trapezoidal, trapezoidal height is 20～180mm, last bottom width 200～350mm, and following bottom width is identical with the cathode block width;
2) connect rectangular tank at cathode block longitudinal middle part upper surface along laterally opening one, groove depth is 20～180mm, and width is 150～250mm;
3) put into one or two cathode steel bars at the cathode block bottom slot, slit between cathode block and the rod iron is stuck with paste with cathode steel bar and is made firm by ramming, wherein the aggregate stuck with paste of cathode steel bar is mixed and made into by in after-smithing petroleum coke, synthetic graphite, electric forging coal, the metallurgical coke one or more, and binding agent is made up of modified coal asphalt and coal tar;
4) keep cathode block to be adjacent and leave 20～40mm slit between the carbon piece, and the gap is made firm by ramming with sticking with paste between charcoal;
5) cathode block is tiled keep behind the bottom of electrolytic tank whole bottom of electrolytic tank negative electrode to have many dovetail grooves, this dovetail groove is by two adjacent carbons pieces and connects to stick with paste between their charcoal and constitute, all cathode block rectangular tanks form vertical elongated slots and with many dovetail groove quadratures.
As improvement, described novel cathode carbon piece can be semi-graphite cathode carbon piece, semi-graphited cathode block, also can be full graphitization cathode carbon block.
When the novel energy-saving aluminum cell with chamfering grooving cathode that adopts the utility model to provide carries out Aluminum Electrolysis Production, for making the energy-saving and cost-reducing best effect of having given play to of electrolyzer, cooperate corresponding electrolysis production processing condition to be: bath voltage is 3.0～4.3V, electrolysis temperature is 930～970 ℃, the electrolyte molecule ratio is 1.9～2.7, electrolyte level is 12～26cm, the aluminium level is 10～28cm (upper surface with the cathode block trapezoidal portions is a benchmark), pole span is 2.5～4.5cm, and alumina concentration is 1.0%～3.0%.
The beneficial effect that produces by the utility model is:
The novel energy-saving aluminum cell with chamfering grooving cathode that the utility model proposes can not only improve the uniform distribution of aluminium liquid, cathode block and rod iron current density and the uniform distribution in magnetic field, the stress that minimizing is produced aluminium liquid because of the action of a magnetic field, can also effectively extenuate the flow velocity of aluminium liquid, and the fluidised form of change aluminium liquid, become turbulent flow and be laminar flow, slow down the fluctuation of interior ionogen of groove and aluminium liquid, thereby reduce pole span and groove pressure drop, make bath voltage reduce 300mV～700mV, ton aluminium direct current consumption is reduced to 11000Kwh～12500Kwh, realizes that electrolysis is energy-saving and cost-reducing.
Description of drawings
Fig. 1 is the electrolyzer cross sectional representation that a chamfering grooving cathode carbon piece connects two rod irons.
Fig. 2 is the electrolyzer vertical section synoptic diagram that a chamfering grooving cathode carbon piece connects two rod irons.
Fig. 3 is the electrolyzer cross sectional representation that a chamfering grooving cathode carbon piece connects a rod iron.
Fig. 4 is the electrolyzer vertical section synoptic diagram that a chamfering grooving cathode carbon piece connects a rod iron.
Among the figure, 1, the steel plate pot shell; 2, calcium silicate board; 3, insulating brick; 4, anti-bleed; 5, lightening casting material; 6, refractory brick; 7, sidewall carbon brick; 8, carbonitride of silicium brick; 9, cathode steel bar; 10, cathode block; 11, rod iron is stuck with paste; 12, stick with paste between carbon; 13, stick with paste on every side; 14, high-strength mould material.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the electrolyzer in the utility model has been strengthened the insulation of sidepiece and bottom, and its concrete brickwork mode is as follows:
1) constructs the electrolyzer periphery with steel plate pot shell 1;
2) at electrolyzer lowest layer place mat one deck calcium silicate board 2;
3) three layers of insulating brick 3 on the calcium silicate board upper berth;
4) the anti-bleed 4 on insulating brick 3 upper berths, and vibration has certain compacted density;
5) will be connected with cathode steel bar 9 and stick with paste the cathode block 10 regular electrolyzers of putting into of the 11 novel chamfering groovings of several piece of making firm by ramming with rod iron;
6) electrolytic bath side part inner lining facet employing lightening casting material 5 is made firm by ramming and is formed, and big face adopts refractory brick 6 near steel plate, makes firm by ramming with high-strength mould material 14 then to form;
7) the side liner on electrolyzer mould material top adopts sidewall carbon brick 7 and carbonitride of silicium brick 8 to build by laying bricks or stones;
8) with sticking with paste 12 between carbon with filling of the space between the cathode block and tamping;
9) with sticking with paste 13 with the space tamping between novel chamfering grooving carbon piece 10, sidewall carbon brick 7, carbonitride of silicium brick 8 and high-strength mould material 14 or the lightening casting material 5 on every side.
The cathode block group of cathode carbon block of electrolytic bath group of the present utility model and traditional electrolyzer also exists than big-difference, is embodied in:
When 1) making cathode block, anticathode carbon piece carries out chamfering, and the cathode block cross section top after the chamfering is trapezoidal, and trapezoidal height is 20～180mm, last bottom width 200～350mm, and the width of going to the bottom is identical with the cathode block width;
2) connect rectangular tank at cathode block longitudinal middle part upper surface along laterally opening one, groove depth is 20～180mm, and width is 150～250mm;
3) put into one or two cathode steel bars at the cathode block bottom slot, slit between cathode block and the rod iron is stuck with paste with cathode steel bar and is made firm by ramming, wherein the aggregate stuck with paste of cathode steel bar is mixed and made into by in after-smithing petroleum coke, synthetic graphite, electric forging coal, the metallurgical coke one or more, and binding agent is made up of modified coal asphalt and coal tar;
4) keep cathode block to be adjacent and leave 20～40mm slit between the carbon piece, and the gap is made firm by ramming with sticking with paste between charcoal;
5) cathode block is tiled keep behind the bottom of electrolytic tank whole bottom of electrolytic tank negative electrode to have many dovetail grooves, this dovetail groove is by two adjacent carbons pieces and connects to stick with paste between their charcoal and constitute, all cathode block rectangular tanks form vertical elongated slots and with many dovetail groove quadratures.
As improvement, described novel cathode carbon piece can be selected semi-graphite cathode carbon piece, semi-graphited cathode block for use, also can be full graphitization cathode carbon block.
Embodiment
Electrolyzer as shown in Fig. 1 and Fig. 2 connects at every cathode block under the situation of two rod irons, and the technical matters condition that electrolyzer described in the utility model is constructed technological standard and production aluminium is as follows:
When 1) making cathode block, anticathode carbon piece carries out symmetrical chamfering, and the cathode block cross section top after the chamfering is trapezoidal, this trapezoidal height is 120mm, upper base hem width 350mm, the width of going to the bottom is all 515mm mutually with the cathode block width, and carbon piece height overall (upper surface and lower surface vertical range) is 550mm; And connect rectangular tank along laterally opening one at carbon piece longitudinal middle part upper surface, and this rectangular tank degree of depth is 120mm, width is 250mm;
2) cathode block adopts semi-graphite cathode carbon piece, and wherein content of graphite is 30%;
3) cathode block is adjacent and leaves the 35mm slit between the carbon piece, and the gap is made firm by ramming with sticking with paste between charcoal.This rod iron is stuck with paste by after-smithing petroleum coke, synthetic graphite and modified coal asphalt and mixed the pinching of coal tar and is formed;
4) construction method that provides previously is provided the electrolyzer mode of constructing, and has strengthened the insulation of sidepiece and bottom;
5) electrolyzer adopts wet method not have the effect roasting and starting, in dovetail groove or rectangular tank, all be filled to and the cathode block upper surface flush before the roasting with synthetic graphite is broken, fill out the medium of the thick different resistivity of one deck 1～2cm at the different subregion of whole electric tank cathode upper surface then, distribution of current is more even when guaranteeing roasting and starting;
When 6) electrolyzer carries out Aluminum Electrolysis Production, the electrolysis process condition is: the groove average voltage is 3.70V, electrolysis temperature is 940～945 ℃, the electrolyte molecule ratio is 2.4～2.6, electrolyte level is 16～18cm, the aluminium level is 20～22cm, and pole span is 3.7～3.9cm, and alumina concentration is 1.5～2.5%.
Carry out Aluminum Electrolysis Production with the technical matters condition of producing aluminium and compare by adopting top electrolyzer to construct technological standard with traditional electrolyzer production method, can make bath voltage be reduced to 3.70V when adopting the utility model by original 4.10V, be that bath voltage reduces 400mV, ton aluminium direct current consumption is reduced to 12000Kwh by original 13300Kwh.
Claims (6)
1, a kind of novel energy-saving aluminum cell with chamfering grooving cathode is characterized in that, the cathode block upper end of described aluminium cell is through chamfering, and the upper surface middle part of cathode block longitudinally is provided with groove.
2, a kind of novel energy-saving aluminum cell with chamfering grooving cathode according to claim 1 is characterized in that, the top of its lateral cross section of novel cathode carbon piece of described process chamfering is trapezoidal.
3, a kind of novel energy-saving aluminum cell with chamfering grooving cathode according to claim 2 is characterized in that, described trapezoidal height is 20～180mm, last bottom width 200～350mm, and following bottom width is identical with the cathode block width.
4, a kind of novel energy-saving aluminum cell with chamfering grooving cathode according to claim 1 is characterized in that, described groove is for connecting the groove of upper surface, and groove shapes is a rectangular tank, and the rectangular tank degree of depth is 20～180mm, and width is 150～250mm.
5, a kind of novel energy-saving aluminum cell with chamfering grooving cathode according to claim 1 is characterized in that, described cathode block bottom connects one or two cathode steel bars.
6, according to each described a kind of novel energy-saving aluminum cell with chamfering grooving cathode of claim 1～5, it is characterized in that described cathode block is adjacent the slit of leaving 20～40mm between the carbon piece, the slit is adopted to stick with paste between carbon and is made firm by ramming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200631450U CN201358306Y (en) | 2009-02-09 | 2009-02-09 | Novel energy-saving aluminum electrolysis bath with chamfered and grooved cathode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200631450U CN201358306Y (en) | 2009-02-09 | 2009-02-09 | Novel energy-saving aluminum electrolysis bath with chamfered and grooved cathode |
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| CN201358306Y true CN201358306Y (en) | 2009-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942676A (en) * | 2010-09-30 | 2011-01-12 | 湖南晟通科技集团有限公司 | Special-shaped cathode structured aluminum electrolytic cell |
| CN101949037A (en) * | 2010-09-30 | 2011-01-19 | 湖南晟通科技集团有限公司 | Building method of aluminum electrolysis cell |
| WO2017132353A1 (en) * | 2016-01-26 | 2017-08-03 | Alcoa Usa Corp. | Insulation assembly for electrolysis cell |
-
2009
- 2009-02-09 CN CNU2009200631450U patent/CN201358306Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942676A (en) * | 2010-09-30 | 2011-01-12 | 湖南晟通科技集团有限公司 | Special-shaped cathode structured aluminum electrolytic cell |
| CN101949037A (en) * | 2010-09-30 | 2011-01-19 | 湖南晟通科技集团有限公司 | Building method of aluminum electrolysis cell |
| CN101942676B (en) * | 2010-09-30 | 2012-05-23 | 湖南晟通科技集团有限公司 | Special-shaped cathode structured aluminum electrolytic cell |
| WO2017132353A1 (en) * | 2016-01-26 | 2017-08-03 | Alcoa Usa Corp. | Insulation assembly for electrolysis cell |
| RU2720129C2 (en) * | 2016-01-26 | 2020-04-24 | АЛКОА ЮЭсЭй КОРП. | Insulation assembly for electrolysis unit |
| US10648094B2 (en) | 2016-01-26 | 2020-05-12 | Elysis Limited Partnership | Insulation assembly for electrolysis cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Deng Fanshun Document name: Notification of patent rights granted to utility models and formalities for registration |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUNAN CHUANG YUAN NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: HUNAN CHUANG YUAN ALUMINUM CO., LTD. Effective date: 20091218 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091218 Address after: Changde County, Hunan City, Taoyuan province disk town, zip code: 415702 Patentee after: Hunan Chuangyuan New Material Co., Ltd. Address before: Changde County, Hunan City, Taoyuan province disk town, zip code: 415702 Patentee before: Hunan Chuangyuan Aluminium Industry Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091209 Termination date: 20170209 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |