CN101928959B - Electric heating roasting device and roasting method before starting aluminium cell - Google Patents
Electric heating roasting device and roasting method before starting aluminium cell Download PDFInfo
- Publication number
- CN101928959B CN101928959B CN2009103015402A CN200910301540A CN101928959B CN 101928959 B CN101928959 B CN 101928959B CN 2009103015402 A CN2009103015402 A CN 2009103015402A CN 200910301540 A CN200910301540 A CN 200910301540A CN 101928959 B CN101928959 B CN 101928959B
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- China
- Prior art keywords
- electric heating
- aluminium cell
- cathode
- roasting
- protective gas
- Prior art date
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 32
- 239000004411 aluminium Substances 0.000 title claims abstract description 32
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000005485 electric heating Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 16
- 229910000323 aluminium silicate Inorganic materials 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 29
- 230000001681 protective effect Effects 0.000 claims description 24
- 238000010792 warming Methods 0.000 claims description 17
- 239000003610 charcoal Substances 0.000 claims description 16
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 12
- 239000011094 fiberboard Substances 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 235000011089 carbon dioxide Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000005995 Aluminium silicate Substances 0.000 abstract 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 abstract 1
- 235000012211 aluminium silicate Nutrition 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- -1 this Chemical compound 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an electric heating roasting device before starting an aluminium cell, comprising an electrolytic cell cathode carbon block or a heteromorphous cathode carbon block (1) in the aluminium cell; the cathode carbon block (1) of the aluminium cell is paved with an electric heating device (2); an aluminium silicate fiber plate (3) is arranged at the lower surface of the electric heating device (2); a carbonization-nitridation silicon block on the side part of the cathode of the aluminium cell is provided with a bracket (4); and an insulation board (5) is paved on the bracket (4). In the invention, through the electric heating device on the cathode carbon block of the aluminium cell is paved, the electric heating device is preferably a crawler-type electric heating device, thus the whole heating is simultaneously carried out on cell cathode, cathode boss and periphery paste of the aluminium cell, heating temperature is relative uniform, and cathode roasting effect is improved.
Description
Technical field
The present invention relates to preceding electric heating roasting device of a kind of starting aluminium cell and roasting method, belong to the aluminium cell technical field.
Background technology
Existing roasting method to negative electrode before the electrobath start is to adopt the mixture roasting method, adds thermal bake-out through the Faradaic current cathode blocks of utilizing electrolyzer self, and this roasting mode is the smooth negative electrode of a general surface mode commonly used.But optimization and development along with the aluminium cell Technology; Specially-shaped cathode charcoal piece has been the preferred substitute of making aluminium electrolytic cell cathode; If continue to use existing cathode charcoal roasting method like this; Just exist specially-shaped cathode charcoal piece and anode carbon block contact surface few, it is inhomogeneous to be heated, problems such as long, the easy oxidation of roasting time, weak effect.There is the uneven shortcoming of being heated to a certain degree too in existing mixture roasting method.
Summary of the invention
The technical problem that the present invention will solve is, electric heating roasting device and roasting method before the good starting aluminium cell of a kind of suitable electric tank cathode charcoal piece roasting and roasting effect are provided, and can overcome the deficiency of prior art.
Technical scheme of the present invention; It comprises specially-shaped cathode charcoal piece or conventional cathode charcoal piece in the aluminium cell calciner, on the cathode carbon pieces of aluminium cell, is equipped with electric heater unit.
Under electric heater unit, be equipped with aluminosilicate fiberboard.
On the sidepiece carbonitride of silicium piece of aluminium electrolytic cell cathode, establish support, on support, be equipped with warming plate.
In the space of support and warming plate sealing, be connected with protective gas.
Described electric heater unit is the resistance-type heating unit.
Described warming plate is an aluminosilicate fiberboard.
On warming plate, be inserted with the protective gas injection tube.
Used protective gas is argon gas or carbonic acid gas.
On electric tank cathode charcoal piece, be provided with device for detecting temperature.
Roasting method is with electric heater unit electric tank cathode charcoal piece to be heated when treating that maturing temperature reaches 90～110 ℃ earlier; Beginning is injected inert protective gas with the flow of 20～30L/min from 4～6 inert protective gas injection tubes; After injecting 150～200min; The flow of inert protective gas is adjusted into 1～2L/min, stops air feed again up to whole electric heating roasting end of processing; Used total time of roasting is 72～96 hours, and the roasting top temperature is 550～850 ℃, decides according to the power of electric heater unit.
Compare with prior art; The present invention is through laying electric heater unit on the cathode carbon pieces of aluminium cell; The preferred resistance-type electrolysis of electric heater unit thermic devices, like the track type electric heater unit, so just can be simultaneously to electric tank cathode, negative electrode boss and paste, the artificial whole heating of stretching one's legs on every side; And Heating temperature is more even, has improved the negative electrode roasting effect.Under electric heater unit, be equipped with aluminosilicate fiberboard, aluminosilicate fiberboard is wideer than electric heater unit, can improve heating surface area like this, makes to be heated more evenly, avoids local temperature too high simultaneously; On the sidepiece carbonitride of silicium piece of aluminium electrolytic cell cathode, establish support, on support, be equipped with warming plate, warming plate adopts aluminosilicate fiberboard, can reduce heat like this and distribute, and accelerates temperature increase speed.In the space of support and warming plate sealing, be connected with protective gas; Can prevent the cathode carbon pieces oxidation like this; Used protective gas is argon gas or carbonic acid gas; The density of argon gas or carbonic acid gas is all big than air, in injection process, just can get rid of oxygen like this, plays the effect of charcoal piece protection against oxidation; On warming plate, be inserted with the protective gas injection tube, make things convenient for sending into of protective gas like this; On electric tank cathode charcoal piece, establish device for detecting temperature, be convenient to grasp temperature rise rate, soaking time and control roasting process like this.The size of the air flow of the temperature in the roasting method, time, inert protective gas all is that the applicant tests, tests the back gained in a large number, at this moment between, can better satisfy roasting in the scope of temperature, flow, improve roasting effect.Meliority such as the present invention simultaneously also has structure, simple to operate, and cost is low.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A view of Fig. 1.
Embodiment
Embodiment: as depicted in figs. 1 and 2, after the solid construction completion of aluminium cell bundle, the aluminium cell upper mechanism is installed, and upper mechanism is carried out the test run examination.On electric tank cathode charcoal piece 1, lay electric heater unit 2 is installed; Electric heater unit 2 preferred resistance-type electrolysis thermic devices; Like the track type electric heater unit; This example is installed 24 of track type electric heater units on electric tank cathode charcoal piece 1, every power is 15kW, and 7 pairs of temperature surveys of 8 device for detecting temperature and control are installed on electric tank cathode charcoal piece 1 before laying.The aluminosilicate fiberboard 3 of 3200 * 300 * 25mm tiles below every track type electric heater unit before laying the track type electric heater unit.After placing electric heater unit 2 and aluminosilicate fiberboard 3; On the sidepiece carbonitride of silicium piece of aluminium electrolytic cell cathode, place the support of manufacturing with channel-section steel 4; At support 4 upper berth warming plates 5; Warming plate 5 preferred aluminosilicate fiberboards all are paved with support 4 with the thick aluminosilicate fiberboard of 25mm when laying, and make the slit minimum.After lay accomplishing, the insulation of scrutiny electric heater unit 2 is sent after guaranteeing not have short circuit or ground connection.Temperature rise rate control curve can the roasting of reference toner particle heating curve carry out the control of electrically heated temperature rise rate.For preventing cathode carbon pieces 1 oxidation in the roasting process; In the space that support 4 and warming plate 5 seal, be connected with protective gas; The method of logical protective gas is on warming plate 5, to insert protective gas injection tube 6, preferred argon gas of used protective gas or carbonic acid gas.The method that concrete cathode blocks is carried out roasting is to add thermal bake-out with electric heater unit 2 cathode blocks 1 earlier; When treating that temperature reaches 90～110 ℃; Beginning is injected inert protective gas with the flow of 20～30L/min from 4～6 inert protective gas injection tubes 6; (fill with the back) behind injection 150～200min, the flow of inert protective gas is adjusted into 1～2L/min, stop air feed again up to whole electric heating roasting end of processing by calculating; Used total time of roasting is 72～96 hours; After when roasting, reaching target temperature, need insulation more than 24 hours.After treating that 1 roasting of electric tank cathode charcoal piece is accomplished, split out electric heater unit 2, aluminosilicate fiberboard 3, support 4, warming plate 5 and device for detecting temperature 7 fast, hang anode fast, strive for being controlled in 2.5 hours to hanging the anode time from splitting out the negative electrode calciner; The adjustment anode carries out flame heating with fuel oil fired heater (kerosene blastburne) at aluminium inlet and flue end behind correct position, just can accomplish the roasting of whole aluminium cell 2 hours heat-up times.
Claims (6)
1. electric heating roasting device before the starting aluminium cell, it comprises specially-shaped cathode or non-specially-shaped cathode charcoal piece (1) in the aluminium cell, it is characterized in that: on the cathode carbon pieces (1) of aluminium cell, be equipped with electric heater unit (2); Under electric heater unit (2), be equipped with aluminosilicate fiberboard (3); On the sidepiece carbonitride of silicium piece of aluminium electrolytic cell cathode, establish support (4), on support (4), be equipped with warming plate (5); On warming plate (5), be inserted with protective gas injection tube (6); On cathode carbon pieces (1), be provided with device for detecting temperature (7).
2. electric heating roasting device before the starting aluminium cell according to claim 1 is characterized in that: in the space that support (4) and warming plate (5) seal, be connected with protective gas.
3. electric heating roasting device before the starting aluminium cell according to claim 1, it is characterized in that: described electric heater unit (2) is the resistance-type electric heater unit.
4. electric heating roasting device before the starting aluminium cell according to claim 1, it is characterized in that: described warming plate (5) is an aluminosilicate fiberboard.
5. electric heating roasting device before the starting aluminium cell according to claim 1, it is characterized in that: used protective gas is argon gas or carbonic acid gas.
6. like electric heating roasting method before each described starting aluminium cell of claim 1 to 5; It is characterized in that: electric tank cathode charcoal piece (1) is heated when treating that maturing temperature reaches 90～110 ℃ earlier with electric heater unit (2); Beginning is injected protective gas with the flow of 20～30L/min from 4～6 protective gas injection tubes (6); After injecting 150～200min, the flow of protective gas is adjusted into 1～2L/min, stops air feed again up to whole electric heating roasting end of processing; Used total time of roasting is 72～96 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103015402A CN101928959B (en) | 2009-06-22 | 2009-06-22 | Electric heating roasting device and roasting method before starting aluminium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103015402A CN101928959B (en) | 2009-06-22 | 2009-06-22 | Electric heating roasting device and roasting method before starting aluminium cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101928959A CN101928959A (en) | 2010-12-29 |
| CN101928959B true CN101928959B (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103015402A Active CN101928959B (en) | 2009-06-22 | 2009-06-22 | Electric heating roasting device and roasting method before starting aluminium cell |
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| CN (1) | CN101928959B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703934B (en) * | 2012-06-08 | 2015-05-20 | 云南铝业股份有限公司 | Method for improving calcination temperature evenness of aluminium electrolysis cell |
| CN103866349B (en) * | 2014-03-07 | 2017-10-10 | 郑州发祥铝业有限公司 | The assemble method of cathode block heater and cathode block and cathode steel bar |
| CN105624730A (en) * | 2016-03-14 | 2016-06-01 | 中冶天工集团有限公司 | Rapid heating method for assembling of aluminum electrolytic cell cathode carbon block |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2416111Y (en) * | 2000-04-07 | 2001-01-24 | 东北大学 | External heating electric roaster |
| CN2928878Y (en) * | 2006-06-08 | 2007-08-01 | 山东铝业股份有限公司 | Electric heater in aluminum electrolytic bath inner lining construction |
| CN101058890A (en) * | 2007-06-12 | 2007-10-24 | 中国铝业股份有限公司 | Method of roasting and starting blast groove type aluminum electrolysis bath |
-
2009
- 2009-06-22 CN CN2009103015402A patent/CN101928959B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2416111Y (en) * | 2000-04-07 | 2001-01-24 | 东北大学 | External heating electric roaster |
| CN2928878Y (en) * | 2006-06-08 | 2007-08-01 | 山东铝业股份有限公司 | Electric heater in aluminum electrolytic bath inner lining construction |
| CN101058890A (en) * | 2007-06-12 | 2007-10-24 | 中国铝业股份有限公司 | Method of roasting and starting blast groove type aluminum electrolysis bath |
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| CN101928959A (en) | 2010-12-29 |
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