CN1058242A - Rapid electric baking of self-baking anode electrolyser - Google Patents
Rapid electric baking of self-baking anode electrolyser Download PDFInfo
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- CN1058242A CN1058242A CN 91107256 CN91107256A CN1058242A CN 1058242 A CN1058242 A CN 1058242A CN 91107256 CN91107256 CN 91107256 CN 91107256 A CN91107256 A CN 91107256A CN 1058242 A CN1058242 A CN 1058242A
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Abstract
The invention belongs to sodium aluminum fluoride---the alumina molten salt electrolysis method is produced the anode baking process of aluminium.Be applicable to aluminium cell with self-baking anode, its unique distinction is that corresponding position of inserting with anode bar is welded with aluminium bar on aluminium sheet, and the aluminium bar upper end wears the charcoal cap.The present invention can make breakaway starting current moment reach circuital 70%, can rise to total current about 30 minutes, only needs roasting four days, with original various roasting methods relatively, avoided Toona sureni, disconnected rod, leaked phenomenon such as paste, saved human and material resources, electric energy greatly.Especially to having the electrolyzer of producing series, can rise to total current at short notice, be unlikely to influence the work of ordinary production groove, the raising of its production efficiency and economic benefit is very significant.
Description
The invention belongs to sodium aluminum fluoride-alumina molten salt electrolysis method and produce the anode baking process of aluminium, be applicable to cell with self baking anode.
Existing soberberg anode technology, particularly concerning the anode-baking of new series aluminium cell, because distribution of current is inhomogeneous, the bottom land temperature is also inhomogeneous, and the roasting process electric energy loss is big, and it is long to reach the required time of ordinary production temperature, needs six usually round the clock.For the aluminium cell that has ordinary production series,, have a strong impact on its production efficiency because it is long to reach the total current required time.
The objective of the invention is to make the direct current that imports from anode to distribute equably, reduce the electric energy loss of roasting process, reach total current fast, shorten roasting time, save electric energy, enhance productivity.
Usually soberberg anode is that direct current is imported by anode bar, through anode mix, dielectric substrate, derives from negative electrode behind the aluminium sheet.Because resistance was very big before the anode mix roasting became cone, electric current can not flow to negative electrode equably, and anode bar Toona sureni, disconnected rod can appear in electric current when too concentrating.Even leak phenomenon such as paste.The present invention's aluminium bar of burn-oning the position that corresponding sub-anode bar inserts on aluminium sheet plays guide functions, make electric current flow to the negative electrode of bottom land equably, make electric current and bottom land uniformity of temperature profile, between this aluminium bar and anode bar, place a charcoal cap, in case anode bar point fusing during ordinary production.The present invention especially is suitable for sub-lateral contact pin cell with self baking anode, for the electrolyzer of 60KA, and the aluminium bar diameter 5cm that welds, length is 18cm.
The Aluminum Electrolysis Production process mainly is to do ionogen with sodium aluminum fluoride-alumina molten salt, and carbon material is negative electrode and anode, obtains liquid aluminium during electrolysis on negative electrode, obtains CO on the anode
2With the CO mixed gas, the aluminum oxide in the ionogen consumes gradually.
Necessary baked anode before producing, the present invention is mainly used in continuous soberberg anode point and separates groove.After anode mix was added in the slotting or upward slotting anode of side, by the joule heating of self-resistance generation and the heat of electrolyte supply, roasting became carbon anode voluntarily.The anode rod iron hammers into and plays conduction and carrying anode weight in the anode bodies.The main purpose of roasting is to make anode sintering become the cone of certain altitude, makes bottom land seam close-burning and preheating electrolytic bath body simultaneously, and the bottom land temperature should reach the temperature of ordinary production as far as possible equably.
In order to save electric energy; the roasting of electrolyzer should be carried out with fast as far as possible speed; but when adopting the technology of coke grain or powdered carbon baked anode in the past; and adopt molten aluminum roasting and do not carry out before the improvement of the present invention; the roasting electric current at the beginning can not be too big; the time that rises to full stream is long, and it is heavy to work.
The medium cell of a 60kA, usually breakaway starting current is from 500A, bath voltage is 0.7～1A, promoted once every 2 hours, every liter 500A in 20 hours, in 22 to 40 hours, rise 1000A at every turn, do not reach circuital 30% round the clock to two, rose 1500A in 42～60 hours, each 2000A that promotes reached total current to 104 hours in 62～102 hours at every turn, the anode bottom begins sintering, after this keep total current to continue roasting to six round the clock not, Zhiyang polar cone body sinter molding can start operation.
Because between anode bar point and the cast aluminium plate all is the anode mix (containing 28～32% molten asphalt in the composition) of not easy conductive, distribution of current is very inhomogeneous, when electric current progressively rises, indivedual anode bars are easy to rubescent, even blow, and flow out the magma that is difficult for blocking, the electrical roasting of having to sometimes be forced to stop at disconnected burning place, again clear up raw material and anode mix in the groove, carry out the secondary electrical roasting again.
The present invention is applicable to the molten aluminum roasting anodic process, take on aluminium sheet corresponding to the burn-on means of aluminium bar of the position that anode bar inserts, can when roasting, produce guide functions, make the distribution of current on the anode bar even, and then make electric current evenly import negative electrode, make the bottom land temperature reach the temperature of ordinary production equably, between aluminium bar and anode, add a charcoal cap of casting mold, anode bar point fusing in the time of can avoiding ordinary production.Aluminium bar diameter 3～10cm, length is as the criterion with the distance of anode bar point to aluminium sheet.
Be description of drawings below:
Accompanying drawing: aluminium liquid electrical roasting synoptic diagram
Anode, 12-anode superstructure, 13-charcoal cap, 14-aluminium bar, 15-aluminium coaming plate, 16-cast aluminium plate, 17-cathode carbon pieces, 18-negative electrode square steel, 19-asbestos plate, 20-aluminium case behind 1-carriage, 2-aluminosilicate fiberboard, 3-diatomite insulating block, 4-refractory brick, the fire-resistant concrete of 5-, 6-charcoal paste, 7-pot shell, 8-side wall carbon block, 9-roasting tankage material, 10-anode bar, the 11-casting mold.
Embodiment: a 60kA lateral contact pin aluminium cell with self-baking anode, adopt bilayer that end aluminium case is arranged, the bottom surface is one deck, and the side is two-layer, and two big faces and two facets all adopt the aluminium coaming plate.Remove foreign material before the roasting earlier, blow off dust, injecting height is the aluminium liquid of 5cm, and the surface should be smooth, must remove surface scum, cooling forms the cast aluminium plate, weld 22 diameter 5cm then on the cast aluminium plate, the aluminium bar of long 18cm respectively adds a charcoal cap on the aluminium bar, anode bar and electrolyzer plane are 15 ° of angles inserts, and the aluminium bar welding position must make the tip of 22 anode bars of first row just be placed on the charcoal cap.The partly aluminium liquid that reinjects in the spaces that the back produces are shunk in the cooling of four jiaos of cast aluminium plates makes four jiaos of cast aluminium plates contact well with carbon cathode.Electrical roasting then, electric current rising gradient such as following table:
Time (branch) 05 10 15 20 25 30
Electric current (KA) 42 45 48 51 54 57 60
Voltage (V) 9 8.5 8.1 7.6 7.4 7.3 7.2
The breakaway starting current of promptly switching on is 42kA, and the rising one-level was 3kA in later per 5 minutes, rose to 60kA about 30 minutes.Keep total current, to about six hours, anode begins to heat up, the pitch effusion of progressively volatilizing.The formation of anode sintering cone is broadly divided into three phases; The roasting initial stage is to begin to generate cone around the anode bar, and with the carrying out and enlarge of roasting, cone extends to the electrolyzer middle body gradually around anode bar then, and the roasting later stage then is that the cone of middle body gradually grows up.Can start operation to four left and right conical body formation round the clock.
The present invention can make breakaway starting current reach circuital 70% at the very start, can in 30 minutes, rise to total current, roasting time shortened to four days by original six days, reaching the circuital time shortened to 30 minutes by original four days, and the roasting process is steady, anode bar is not rubescent, and constantly the paste phenomenon does not more take place to leak rod.The anode sintering cone is normal, and roasting process is simple to operate, has removed in the past anxiety from and the heavy work scene, reduced the huge loss of human and material resources, electric energy, every platform trough power consumption 1.81 ten thousand kilowatt-hours when roasting finishes, and be 30,000 kilowatt-hours, even up to 50,000 kilowatt-hours in the past.
Particularly, when one of them electrolyzer needs baked anode, can rise to total current at short notice, not influence the work of ordinary production groove, improve the production efficiency of electrolytic aluminum greatly for ordinary production series.
In sum, rapid electric baking of self-baking anode electrolyser method of the present invention is to improve the effective ways of Aluminum Electrolysis Production efficient, has improved production environment, has saved electric energy, has reduced the manpower consumption, and the economic benefit in institute generation is difficult to estimate.
Claims (3)
1, a kind of sodium aluminum fluoride-alumina molten salt electrolysis method is produced the anode baking process of aluminium, and direct current imports from anode bar, through deriving from negative electrode behind anode mix, dielectric substrate, the aluminium lamination, it is characterized in that: be welded with aluminium bar at aluminium lamination corresponding to the position that anode bar inserts.
2, technology according to claim 1 is characterized in that: place a charcoal cap between aluminium bar and anode bar.
3, technology according to claim 1 and 2 is characterized in that: when being used for medium-sized lateral contact pin cell with self baking anode, and 5 centimetres of aluminium bar diameters, 18 centimetres of length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107256 CN1058242A (en) | 1991-07-23 | 1991-07-23 | Rapid electric baking of self-baking anode electrolyser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107256 CN1058242A (en) | 1991-07-23 | 1991-07-23 | Rapid electric baking of self-baking anode electrolyser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1058242A true CN1058242A (en) | 1992-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107256 Pending CN1058242A (en) | 1991-07-23 | 1991-07-23 | Rapid electric baking of self-baking anode electrolyser |
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| CN (1) | CN1058242A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995058A (en) * | 2012-12-06 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
| CN104611723A (en) * | 2015-03-11 | 2015-05-13 | 东北大学设计研究院（有限公司） | Method for reducing new anode current conducting time of electrolytic cell |
| WO2018120255A1 (en) * | 2016-12-30 | 2018-07-05 | 山西精之铝科技有限公司 | Inbuilt conductor continuous aluminium frame anode aluminium electrolytic bath |
-
1991
- 1991-07-23 CN CN 91107256 patent/CN1058242A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995058A (en) * | 2012-12-06 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
| CN102995058B (en) * | 2012-12-06 | 2015-06-17 | 云南云铝涌鑫铝业有限公司 | Method for paving roasting medium in aluminum electrolysis cell and method for roasting lining |
| CN104611723A (en) * | 2015-03-11 | 2015-05-13 | 东北大学设计研究院（有限公司） | Method for reducing new anode current conducting time of electrolytic cell |
| CN104611723B (en) * | 2015-03-11 | 2017-01-11 | 东北大学设计研究院（有限公司） | Method for reducing new anode current conducting time of electrolytic cell |
| WO2018120255A1 (en) * | 2016-12-30 | 2018-07-05 | 山西精之铝科技有限公司 | Inbuilt conductor continuous aluminium frame anode aluminium electrolytic bath |
| US11015254B2 (en) | 2016-12-30 | 2021-05-25 | Shanxi Jingzhi Aluminium Technology Co., Ltd. | Aluminum electrolytic bath having continuous aluminum-frame anode with built-in conductors |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |