CN102851701A - Multi-groove multi-hole prebaked anode - Google Patents
Multi-groove multi-hole prebaked anode Download PDFInfo
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- CN102851701A CN102851701A CN2011101825760A CN201110182576A CN102851701A CN 102851701 A CN102851701 A CN 102851701A CN 2011101825760 A CN2011101825760 A CN 2011101825760A CN 201110182576 A CN201110182576 A CN 201110182576A CN 102851701 A CN102851701 A CN 102851701A
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Abstract
The invention discloses a multi-groove multi-hole prebaked anode used in aluminum electrolysis industry, the bottom of which being provided with at least two grooves having at least one intersecting point, at least one vent hole being disposed on the grooves. By changing the relative positions of a plurality of grooves of the prebaked anode in prior art and disposing a plurality of vent holes on the top of the grooves, channels and passages for discharging gas of the anode are increased, and the discharge distance and the discharge resistance of bubbles are reduced, leading to apparent reduction of bubbling degree of electrolyte around the anode, and the improvement of current efficiency of electrolysis and stable operation of the electrolytic cell.
Description
Technical field
The present invention relates to technical field of aluminum electrolysis, relate in particular to a kind of multiple-grooved multiple-hole prebaked anode that is provided with many intersection trench.
Background technology
The aluminium industrial production mainly adopts sodium aluminum fluoride-alumina molten salt electrolysis method, after direct current passes into electrolyzer, be immersed in negative electrode and multiple-grooved multiple-hole prebaked anode generation electrochemical reaction in the ionogen: the electrolysate on the negative electrode is aluminium liquid, and the electrolysate on the multiple-grooved multiple-hole prebaked anode is CO
2Gas.
The function of multiple-grooved multiple-hole prebaked anode is: direct current is transferred to electrolyte solution in the electrolyzer by anode rod, explosion block, anode steel jaw and anode block, connects circuit.The anode that the aluminum current electrolysis is used is imitative rectangular parallelepiped piece, and upper surface is embedded with steel pawl electric installation, and bottom is planar design.Along with the carrying out of electrolytic process, the anode bottom area is large and flat, and gas discharge bottom resistance is large, and the air film layer that approximately 2cm is thick is just formed on the anode bottom like this.In order to prevent that secondary reaction from reducing current efficiency, then must increase the distance between the anode and cathode, thereby the rising bath voltage increases power consumption, increases the manufacturing cost of electrolytic aluminum.Common CO
2Can produce the volts lost of 250mV, and volts lost meeting power consumption 3 degree of 1mV are produced like this 1 ton of aluminium ingot and can be consumed 750 degree electricity more.Therefore, effectively discharge in time the CO that produces on the prebaked anode
2Gas becomes the focus that each electrolytic aluminum producer pays close attention to.
At present, fluted multiple-grooved multiple-hole prebaked anode is opened as depicted in figs. 1 and 2 in the bottom surface of aluminum electrolysis industry employing both at home and abroad, and existing anode channels mostly is 1-3 road straight line through slot parallel to each other, can be vertical or horizontal perforation, and the groove top is horizontal linear.
Summary of the invention
The embodiment of the invention provides a kind of multiple-grooved multiple-hole prebaked anode, change the relative position of a plurality of grooves of prebaked anode in the prior art, and offer a plurality of venting holes at prebaked anode groove top, increase channel and passage that anodic gas is discharged, reduce bubble and discharge resistance, the electrolysis bath ebullition dynamics obviously reduces around making anode, and is energy-saving and cost-reducing.
For achieving the above object, the embodiment of the invention provides following technical scheme:
A kind of multiple-grooved multiple-hole prebaked anode, its bottom surface is provided with at least two grooves, and there is at least one intersection point in this groove, is provided with at least one vertical venting hole on the described groove.
Further, the angle between at least two these grooves is 90-140 °, and the angle at described venting hole and groove top is 60-90 °.
Further, the shape of cross section of this venting hole is circle, trilateral, tetragon or hexagon, can link to each other with the groove intersection point.
Further, the center top of this this groove arrives the distance of channel bottom less than the top, two ends of described groove to the distance of channel bottom.
Further, this top, groove vertical section is arc or V-arrangement.
Further, the deep equality of at least two these grooves or unequal, the width of at least two these grooves equates or is unequal.
Further, the two ends at this top, groove vertical section are and the parallel or uneven line segment in bottom, groove vertical section.
Further, the distance of the two ends at this top, groove vertical section and groove vertical section bottom is unequal.
Compared with prior art, the concrete beneficial effect of multiple-grooved multiple-hole prebaked anode of the present invention is as follows:
1, with respect to existing parallel-groove, the groove intersection point after charcoal element prebake sun of the present invention is optimized generally is positioned near anode bottom center's point, and the central point bubble that is conducive to the most easily assemble the anode bottom surface is discharged; And the venting hole that links to each other with groove further accelerates the direct rising of bubble;
2, the groove of optimizing relative position and venting hole being set has disperseed bubble to discharge approach, electrolysis bath ebullition is even around making anode, the boiling dynamics obviously reduces, reduce the disturbance of melt in electrolyte flow rate and the electrolyzer, the swing and the pin that reduce bath voltage shake, increase the stability of Aluminium Electrolysis, reduced the chance of negative electrode aluminium liquid and anodic gas generation secondary reaction, be conducive to improve Faradaic current efficient; The swing of bath voltage on average reduces by 2～5mV, improves the stability of Aluminium Electrolysis, improves Aluminum Electrolysis Efficiency approximately 0.3%, and is conducive to improve the other technologies economic target;
3, optimize relative position and venting hole is set after groove increase channel and the channel volume that anodic gas is discharged, shortened the distance that anodic gas is discharged process, so that CO
2Gas effusion resistance is less, is beneficial to the bubble of assembling multiple-grooved multiple-hole prebaked anode bottom and discharges fast, reduces cell resistance, reduces electrolyzer setting voltage and operating voltage, thereby reduces power consumption.
Description of drawings
Apparently, the accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of prior art Anodic groove;
Fig. 2 is the schematic diagram of prior art Anodic bottom surface;
Fig. 3 is the schematic diagram of the embodiment of the invention one anode channels;
Fig. 4 is the elevational schematic view of the embodiment of the invention one anode channels;
Fig. 5 is the schematic diagram of the embodiment of the invention two anode channels;
Fig. 6 is another schematic diagram of the embodiment of the invention two anode channels;
Fig. 7 is the another schematic diagram of the embodiment of the invention two anode channels;
Fig. 8 is an again schematic diagram of the embodiment of the invention two anode channels;
Fig. 9 is the schematic diagram of the embodiment of the invention three anode channels;
Figure 10 is the elevational schematic view of the embodiment of the invention three anode channels;
Figure 11 is another elevational schematic view of embodiment of the invention anode channels;
1, anode end face, the 2, first groove, the 3, second groove, 4, the anode bottom surface, 5, intersection point, the 6, the 3rd groove, 7, vertical venting hole.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention is offered a plurality of venting holes by the relative position of a plurality of grooves of prebaked anode in the change prior art and at the groove top, increase channel and passage that anodic gas is discharged, reduce bubble and discharge resistance, the electrolysis bath ebullition dynamics obviously reduces around making anode, is conducive to improve the steady running of Faradaic current efficient and electrolyzer.
Can use the empty rod of system, make venting hole.Concrete steps are: will make empty rod and insert process vibration pressing one-time moulding in the anode block raw material, thereby form venting hole.Groove then adopts machining process to make.
It below is specific embodiment.The embodiment of the invention and accompanying drawing describe as example with the common anode shape, but those skilled in the art should learn, the anode with anode, ship type anode, inert anode and other shapes and material of chamfering does not affect the realization of the embodiment of the invention yet.
Embodiment one,
Referring to Fig. 3 and Fig. 4, multiple-grooved multiple-hole prebaked anode of the present invention comprises the first groove 2 and the second groove 3, the first grooves 2 arrange along the anode length direction, and the second groove 3 arranges along the anode width direction, and the first groove 2 and the second groove 3 intersections produce an intersection point 5.This intersection point 5 is communicated with two grooves, so that anode bottom bubble can be opened Accelerating Removal speed by the channel ease of four direction; And general near anode bottom centre point because of the position of intersection point 5, just especially accelerated at present bubble difficult discharge, that anode bottom centre's point produces.
The angle that the first groove 2 and the second groove are 3 is between 90-140 °, and angle refers to the obtuse angle that two grooves form.90 ° as shown in Figure 4, and 140 ° as shown in figure 11.
Be provided with at least one vertical venting hole 7 at the top of the first groove 2 and the second groove 3.Vertical venting hole 7 can be 60-90 ° with the angle at groove top, and the bubble that is beneficial in the groove rises.The shape of cross section of vertical venting hole 7 can be circle, trilateral, tetragon or hexagon, does not affect the realization of the embodiment of the invention.
Embodiment two,
Referring to Fig. 5 to Fig. 8, the distance of channel bottom is arrived in the centre of multiple-grooved multiple-hole prebaked anode the first groove 2 of the present invention less than the two ends at groove top to the distance of channel bottom.Crown center refers to groove vertical section trisection in the longitudinal direction, the shared position of middle 1/3 part.
Referring to Fig. 5, namely the length of line segment A2B2 is less than line segment A1B1, and the length of line segment A3B3 is less than line segment A4B4.So, in the middle of the two ends of the first groove 2 top line were higher than, bubble density was less than the electrolyte solution volume density, and then the middle bubble that produces and assemble can be along groove top that tilt, more and more higher road nature fast rise, until the effusion ionogen.
And multiple-grooved multiple-hole prebaked anode the first groove 2 groove vertical section top length of the present invention are greater than the length of bottom, groove vertical section, and referring to Fig. 5, namely the length of line segment A1A2+ line segment A3A4 is greater than the length of line segment B1B2+ line segment B3B4.So, the space at the first groove 2 tops is greater than the bottom, then can further impel the diffusion of stretching to the top of bottom bubble, accelerates effusion.
It should be explained that, referring to Fig. 5 to Fig. 8, bottom, above-mentioned groove vertical section refers to the recess that is revealed in anode surface, and the channel bottom plane overlaps with multiple-grooved multiple-hole prebaked anode surface, being the most shallow place of groove, may be bottom, side or any one surface of multiple-grooved multiple-hole prebaked anode; And top, groove vertical section refers to and sinks into anode interior, is from the sightless plane of anode front appearance, namely the depths of groove.
Groove vertical section top length is greater than the bottom lengths of groove vertical section, and the lines that namely represent top, groove vertical section are non-rectilinear; That is to say, the lines A1A4 at top, groove vertical section 2 includes but not limited to arc, V-arrangement, fold-line-shaped, stepped appearance, irregular shape etc., comprises that also the two ends at top, groove vertical section as shown in Figure 8 are parallel or uneven line segment bottom the groove vertical section.The radian of arc is 0.26 π～0.62 π, and effect is better.
For example, be 1550mm, highly be the multiple-grooved multiple-hole prebaked anode of 650mm for longitudinal length, the bottom lengths of groove vertical section is 1550mm, groove vertical section top length is then greater than 1550mm: the top angle is that the length of 150 ° V-arrangement broken line is about 1600mm, and lowest part is the anode mid-height.
And, aforesaid multiple-grooved multiple-hole prebaked anode also should have the top any point of the first groove 2 and top at least another point to the unequal characteristic of distance of channel bottom.
Above-mentionedly all describe as an example of the top line of the first groove 2 example, those skilled in the art should learn, the processing mode with the first groove 2 all can be taked in the top of each groove such as the second groove 3, the 3rd groove 6 even the 4th groove, is conducive to equally the bottom bubble and overflows.
In addition, as shown in Figure 7 and Figure 8, the degree of depth of the first groove 2, the second groove 3 even each groove can be inconsistent, is conducive to bubble and discharges from the different heights of anode sides, slows down electrolytical boiling intensity on every side, keeps electrolyzer stable.The width of the first groove 2, the second groove 3 even each groove also can be inconsistent, and the position in electrolyzer arranges flexibly according to practical situation and anode, generally changes in 5～30mm scope.The distance of the two ends at each groove top and bottom, groove vertical section can be unequal, and the position in electrolyzer arranges flexibly according to practical situation and anode, is conducive to equally bubble and discharges from the different heights of anode sides, slows down electrolysis bath ebullition.
Embodiment three,
Referring to Figure 10 and Figure 11, Mutislot pre-baked anode of the present invention comprises the first groove 2, the second groove 3 and the 3rd groove 6, the first groove 2 arranges along the anode length direction, the second groove 3 and the 3rd groove 6 arrange along the anode width direction, therefore, the first groove 2 and the second groove 3, the 3rd groove 6 must produce two intersection points 5, have especially accelerated at present bubble difficult discharge, that anode bottom centre's point produces.And bubble can be discharged from 6 notches of anode sides, further disperses bubble to discharge density.
And, vertical venting hole 7 is arranged on the groove top, not only accelerate the bubble velocity of discharge, also so that bubble has more multiple exit, disperse electrolysis bath ebullition density and dynamics, be beneficial to bath voltage and reduce swing, tend to be steady, improve current efficiency.
The processing of each groove top, the degree of depth, width repeats no more with embodiment one and embodiment two.
Above a kind of multiple-grooved multiple-hole prebaked anode that the embodiment of the invention is provided is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in summary, this description should not be construed as limitation of the present invention.
Claims (10)
1. multiple-grooved multiple-hole prebaked anode, its bottom surface is provided with at least two grooves, it is characterized in that, and there is at least one intersection point in described groove, and described groove top is provided with at least one vertical venting hole.
2. multiple-grooved multiple-hole prebaked anode according to claim 1 is characterized in that, the angle between at least two described grooves is 90-140 °, and the angle at described venting hole and groove top is 60-90 °.
3. multiple-grooved multiple-hole prebaked anode according to claim 1 is characterized in that, the shape of cross section of described venting hole is circle, trilateral, tetragon or hexagon.
4. multiple-grooved multiple-hole prebaked anode according to claim 1 is characterized in that, described venting hole links to each other with described intersection point.
5. according to claim 1 to 4 each described multiple-grooved multiple-hole prebaked anodes, it is characterized in that, the center top of described groove arrives the distance of channel bottom less than the top, two ends of described groove to the distance of channel bottom.
6. multiple-grooved multiple-hole prebaked anode according to claim 5 is characterized in that, top, described groove vertical section be shaped as arc or V-arrangement.
7. multiple-grooved multiple-hole prebaked anode according to claim 5 is characterized in that, the deep equality of at least two described grooves or unequal.
8. multiple-grooved multiple-hole prebaked anode according to claim 5 is characterized in that, the width of at least two described grooves equates or be unequal.
9. according to claim 6 to 8 each described multiple-grooved multiple-hole prebaked anodes, it is characterized in that, the two ends at top, described groove vertical section are and the parallel or uneven line segment in bottom, groove vertical section.
10. according to claim 6 to 8 each described multiple-grooved multiple-hole prebaked anodes, it is characterized in that, the distance of the two ends at top, described groove vertical section and bottom, groove vertical section is unequal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110182576.0A CN102851701B (en) | 2011-07-01 | 2011-07-01 | A kind of multiple-grooved multiple-hole prebaked anode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110182576.0A CN102851701B (en) | 2011-07-01 | 2011-07-01 | A kind of multiple-grooved multiple-hole prebaked anode |
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| CN102851701A true CN102851701A (en) | 2013-01-02 |
| CN102851701B CN102851701B (en) | 2016-07-20 |
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| US5538607A (en) * | 1995-04-12 | 1996-07-23 | Pate; Ray H. | Anode assembly comprising an anode bar for the production of molten metal by electrolysis |
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| WO2009066025A2 (en) * | 2007-09-14 | 2009-05-28 | Alcan International Limited | Grooved anode for an electrolysis tank |
| CN101914787A (en) * | 2010-08-25 | 2010-12-15 | 湖南创元铝业有限公司 | Prebaked anode |
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| CN201793769U (en) * | 2010-09-08 | 2011-04-13 | 湖南中大业翔科技有限公司 | Gas-guiding prebaked anode for aluminum electrolysis |
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2011
- 2011-07-01 CN CN201110182576.0A patent/CN102851701B/en not_active Expired - Fee Related
Patent Citations (6)
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| US5538607A (en) * | 1995-04-12 | 1996-07-23 | Pate; Ray H. | Anode assembly comprising an anode bar for the production of molten metal by electrolysis |
| CN2811326Y (en) * | 2005-07-08 | 2006-08-30 | 中国铝业股份有限公司 | Prebaked carbon anode for electrolyzing aluminum |
| WO2009066025A2 (en) * | 2007-09-14 | 2009-05-28 | Alcan International Limited | Grooved anode for an electrolysis tank |
| CN101914787A (en) * | 2010-08-25 | 2010-12-15 | 湖南创元铝业有限公司 | Prebaked anode |
| CN201778126U (en) * | 2010-09-08 | 2011-03-30 | 湖南中大业翔科技有限公司 | Honeycomb-like prebaked anode for aluminum electrolysis |
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| 石良生: "铝电解用预焙阳极开槽问题", 《中国有色金属》 * |
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Inventor after: Wang Ran Inventor after: Chen Meng Inventor after: Guo Lei Inventor after: Han Dong Inventor before: Liu Yu Inventor before: Jing Yeling Inventor before: Hong Bo |
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Effective date of registration: 20171226 Address after: 831300 the Xinjiang Uygur Autonomous Region Wujiaqu City Industrial Park Management Committee Office Building No. 107 Patentee after: Xinjiang agriculture six Division Carbon Co., Ltd. Address before: Sheng Tong Industrial Park No. 109 Venus 410200 Hunan province Changsha road in Wangcheng County Patentee before: Hunan Shengtong Technology Group Co., Ltd. |
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Granted publication date: 20160720 Termination date: 20200701 |