CN102912378A - Aluminium cell titanium boride coating thermal curing and charring method - Google Patents
Aluminium cell titanium boride coating thermal curing and charring method Download PDFInfo
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- CN102912378A CN102912378A CN2012104464913A CN201210446491A CN102912378A CN 102912378 A CN102912378 A CN 102912378A CN 2012104464913 A CN2012104464913 A CN 2012104464913A CN 201210446491 A CN201210446491 A CN 201210446491A CN 102912378 A CN102912378 A CN 102912378A
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- titanium boride
- boride coating
- cell
- charring
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Abstract
The invention relates to an aluminium cell titanium boride coating thermal curing and charring method, which is characterized in that a titanium boride coating is thermal cured and charred by radiation heating tubes and then an aluminium cell is continuously heated and roasted; and then, after the electrolytic cell is roasted completely, the heating device is removed and the electrolyte is infused for starting the electrolytic cell. According to the invention, the specific thermal curing and charring device is not required, the radiation heating tubes are used for thermal curing and charring the titanium boride coating and then a roasting cell is heated and roasted directly, as a result, the problems in the conventional method that the titanium boride coating testing cell applies the specific heating equipment for thermal curing and charring, the heating device is demounted after charring, and the cell is filled again for roasting start after the electrolytic cell is cooled down, so that not only is large amount of electric energy wasted, but also the probability of stripping and delaminating, caused by repeatedly temperature rise and drop of the titanium boride coating and a cathode carbon block, of the titanium boride coating and a carbon base with different dilatation coefficients is increased, and the service life thereof is shortened can be solved, and meanwhile, the labor intensity can be reduced substantially.
Description
Technical field
The present invention relates to a kind of titanium boride coating and be heating and curing and charring process, particularly a kind of large-sized prebaked cell for aluminum-reduction titanium boride coating is heating and curing and charring process, belongs to technical field of aluminum electrolysis.
Background technology
TiB
2The applied research work of inert cathode in aluminium cell all is that domestic and international electrolysis of aluminum scientific worker studies a very important problem improving the Aluminium Electrolysis economic and technical norms all the time.In recent years, along with the Materials Science and Engineering technology makes substantial progress, TiB
2The research of inert cathode material makes great progress, TiB
2The technology of preparing of-C gel coating and price satisfy industrialized requirement substantially, and have obtained good economic and technical norms at Thoughs, but TiB
2The application of coating in aluminium cell also is faced with TiB
2Coating is easily peeled off, and work-ing life is short and be heating and curing and the restricted T iB such as the charing difficulty is large
2The difficult problem of coatings industry application.
TiB
2Thermal expansion/the percent thermal shrinkage of-C gel coating is an important factor that all the time restricts the titanium boride coating industrial applications, TiB
2-C gel coating will be applied in the electrolysis of aluminum, and its resistance toheat must be close with body material, otherwise because the difference of the two thermal characteristics can produce thermal stresses at the interface, can cause peeling off or ftractureing of coating when this thermal stresses acquires a certain degree.In addition, existing be heating and curing and the charing mode is to heat by the common heating sheet, because not requiring in strict accordance with heating up control heat-up rate and heat-up time, and be heating and curing and charing after, cool off again tankage, carry out again afterwards roasting and starting aluminum electrolytic cell, and the temperature of electrolyzer from roasting preheating to this one-phase of normal production is all in continuous variation, even the phenomenon that in same electrolyzer, exists temperature distributing disproportionation to spare, so that the different cathode material of two kinds of thermal expansion/percent thermal shrinkages produces in repeatedly heating-cooling-heat-processed and peels off or ftracture simultaneously very power consumption.
Thereby TiB is optimized in research
2-C gel coating composition is selected the coefficient of expansion TiB close with the cathode carbon pieces coefficient of expansion
2-C gel coating, and adopt suitable being heating and curing and charing method, the while is heating and curing in strict accordance with titanium boride coating and the charing heating curve heats up, and is to solve the effective way that titanium boride coating is peeled off.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of new the electrically heated charing of aluminium cell titanium boride coating and curing are provided, to solve titanium boride coating delamination problem, reduce coating and be heating and curing and charing energy consumption and difficulty.
A kind of aluminium cell titanium boride coating provided by the invention is heating and curing and charing method, it is characterized in that the following step is arranged:
A, stick with paste at aluminium electrolytic cell cathode charcoal piece, break joint, stick with paste on every side and the artificial thick TiB of surface-coated 3～8mm that stretches one's legs
2-C gel coating;
B, between cathode carbon pieces and anode, in the cavity between anode carbon block and the electrolyzer periphery side wall carbon block, unsettled installation radiation heating tube is installed resistant to elevated temperatures insulated thermal insulating layer with sidepiece above anode, and reaches resistant to elevated temperatures insulated thermal insulating layer laying electrolyte powder layer above anode;
C, energising add thermal bake-out, until TiB
2-C gel coating solidifies and charing;
D, when the roasting of electrolytic bath temperature when the start-up temperature, take out the radiation heating tube of unsettled installation, pour into ionogen, enter startup, the production process of electrolyzer.
The resistant to elevated temperatures insulated thermal insulating layer of described B step is high temperature resistant asbestos plate, and its thickness is 10～15mm;
The thickness of the electrolyte powder layer of described B step, different in the different sites requirement as required, can prevent that air from entering the roasting groove and being advisable, usually be controlled in 2.5 ± 0.5cm scope.
It is by TiB shown in Figure 2 that the energising of described C step adds thermal bake-out
2-C gel coating heat temperature raising speed and heat-up time carry out.
Described TiB
2-C glue is commercial product.
The present invention compared with prior art has following beneficial effect:
(1) do not need special being heating and curing and carbonizing apparatus is installed, simple to operate.
(2) be heating and curing and charing after continue electrolyzer is added thermal bake-out, directly pouring into ionogen after roasting is finished starts, reduced that traditional heating is solidified and charing after cool off, tankage carries out roasting and starting and the probability of the not quite identical titanium boride coating of the coefficient of expansion that causes and the plain matrix stripping delamination of charcoal again after the cooling.
(3) be heating and curing and charing TiB
2Continue heating roasting electrolyzer behind the-C gel coating, decrease be heating and curing and energy consumption that charing consumes.
(4) can stop TiB
2The obnoxious flavour uncontrollable discharge that-C gel coating is heating and curing and produces during charing.
Description of drawings
Fig. 1 is electrolyzer tankage structural representation of the present invention.
Fig. 2 is TiB
2-C gel coating is heating and curing and charing roasting curve.
Described electrolyzer comprises cell body 1 and is fixed on the cathode block 2 of cell body 1 bottom and artificially stretches one's legs 6 that electric tank cathode charcoal piece, break joint stick with paste, stick with paste and the artificial surface of stretching one's legs scribbles TiB on every side
2-C gel coating 3, establish the anode 4 of ascending, descending in the cell body 1, below anode 4, the limit cavities 7 interior activities of 1 of 4 on anode, anode 4 and cell body arrange radiation heating tube 5, are provided with the electrolyte powder layer 9 that thickness is 2cm in resistant to elevated temperatures insulated thermal insulating layer 8 and anode carbon block 4 tops.
Embodiment
Also the present invention will be further described by reference to the accompanying drawings below by embodiment.
Provided by the invention to TiB
2Method process the following step of the curing of-C gel coating electric heating roasting and charing:
A, at aluminium electrolytic cell cathode charcoal piece 2, artificially stretch one's legs 6, carbon paste and around stick with paste the thick TiB of surface-coated 3mm
2-C gel coating 3;
B, between cathode carbon pieces 2 and anode carbon block 4, the electrolyzer centre joint between anode carbon block 4 and the anode carbon block 4 and sidepiece cavity 7 interior unsettled installation radiation heating tubes 5, above anode carbon block 4, with sidepiece the thick high temperature resistant asbestos plate 8 of 1 ㎝ is installed, and above anode carbon block 4 and resistant to elevated temperatures insulated thermal insulating layer 8 lay the thick electrolyte powder layer 9 of 2.5 ± 0.5cm;
C, in strict accordance with TiB shown in Figure 2
2-C gel coating heat temperature raising speed and heat-up time, energising adds thermal bake-out, to TiB
2-C gel coating is cured and charing, carries out thermal conversion take radiation heating tube (metallic resistance) 5 as electric conductor after the energising, is heat energy with electric energy conversion, by radiation, convection current and heat conducting mode, with heat biography to around, with to TiB
2-C gel coating 3 carries out continual heat temperature raising, and the adjusting by conventional silicon controlled rectifier electrical heating power housing, realization is to the accurate control of electrolyzer heat-up rate, in strict accordance with titanium boride coating and Carbon cathode thickener Characteristics Control heat-up rate and heating-up time, titanium boride coating is heating and curing and charing;
D, calcination are removed the radiation heating tube 5 of unsettled installation to start-up temperature, pour into ionogen, namely carry out startup and the postorder production of electric angle groove.
Provided by the invention to TiB
2Method process the following step of the curing of-C gel coating electric heating roasting and charing:
A, at aluminium electrolytic cell cathode charcoal piece 2, artificially stretch one's legs 6, carbon paste and around stick with paste the thick TiB of surface-coated 5mm
2-C gel coating 3;
B, between cathode carbon pieces 2 and anode carbon block 4, the electrolyzer centre joint between anode carbon block 4 and the anode carbon block 4 and sidepiece cavity 7 interior unsettled installation radiation heating tubes, above anode carbon block 4, with sidepiece the thick high temperature resistant asbestos plate 8 of 1.3 ㎝ is installed, and above anode carbon block 4 and resistant to elevated temperatures insulated thermal insulating layer 8 lay the thick electrolyte powder layer 9 of 2.5 ± 0.5cm;
C, in strict accordance with TiB shown in Figure 2
2-C gel coating heat temperature raising speed and heat-up time, energising adds thermal bake-out, to TiB
2-C gel coating is cured and charing, carries out thermal conversion take radiation heating tube (metallic resistance) 5 as electric conductor after the energising, is heat energy with electric energy conversion, by radiation, convection current and heat conducting mode, with heat biography to around, with to TiB
2-C gel coating 3 carries out continual heat temperature raising, and the adjusting by conventional silicon controlled rectifier electrical heating power housing, realization is to the accurate control of electrolyzer heat-up rate, in strict accordance with titanium boride coating and Carbon cathode thickener Characteristics Control heat-up rate and heating-up time, titanium boride coating is heating and curing and charing;
D, calcination are removed the radiation heating tube 5 of unsettled installation to start-up temperature, pour into ionogen, namely carry out startup and the postorder production of electric angle groove.
Provided by the invention to TiB
2Method process the following step of the curing of-C gel coating electric heating roasting and charing:
A, at aluminium electrolytic cell cathode charcoal piece 2, artificially stretch one's legs 6, carbon paste and around stick with paste the thick TiB of surface-coated 8mm
2-C gel coating 3;
B, between cathode carbon pieces 2 and anode carbon block 4, the electrolyzer centre joint between anode carbon block 4 and the anode carbon block 4 and sidepiece cavity 7 interior unsettled installation radiation heating tubes, above anode carbon block 4, with sidepiece the thick high temperature resistant asbestos plate 8 of 1.5 ㎝ is installed, and above anode carbon block 4 and resistant to elevated temperatures insulated thermal insulating layer 8 lay the thick electrolyte powder of 2.5 ± 0.5cm 9;
C, in strict accordance with TiB shown in Figure 2
2-C gel coating heat temperature raising speed and heat-up time, energising adds thermal bake-out, to TiB
2-C gel coating is cured and charing, carries out thermal conversion take radiation heating tube (metallic resistance) 5 as electric conductor after the energising, is heat energy with electric energy conversion, by radiation, convection current and heat conducting mode, with heat biography to around, with to TiB
2-C gel coating 3 carries out continual heat temperature raising, and the adjusting by conventional silicon controlled rectifier electrical heating power housing, realization is to the accurate control of electrolyzer heat-up rate, in strict accordance with titanium boride coating and Carbon cathode thickener Characteristics Control heat-up rate and heating-up time, titanium boride coating is heating and curing and charing;
D, calcination are removed the radiation heating tube 5 of unsettled installation to start-up temperature, pour into ionogen, namely carry out startup and the postorder production of electric angle groove.
Claims (3)
1. an aluminium cell titanium boride coating is heating and curing and charing method, it is characterized in that having following operation:
A, stick with paste at aluminium electrolytic cell cathode charcoal piece, break joint, stick with paste on every side and the artificial thick TiB of surface-coated 3～8mm that stretches one's legs
2-C gel coating;
B, between cathode carbon pieces and anode, in the cavity between anode carbon block and the electrolyzer periphery side wall carbon block, unsettled installation radiation heating tube is installed resistant to elevated temperatures insulated thermal insulating layer with sidepiece above anode, and reaches resistant to elevated temperatures insulated thermal insulating layer laying electrolyte powder layer above anode;
C, energising add thermal bake-out, until TiB
2-C gel coating solidifies and charing;
D, when the roasting of electrolytic bath temperature when the start-up temperature, take out the radiation heating tube of unsettled installation, pour into ionogen, enter startup, the production process of electrolyzer.
2. according to claim 1 method is characterized in that the said resistant to elevated temperatures insulated thermal insulating layer of described B step is selected high temperature resistant asbestos plate, its thickness 10～15 ㎜; The thickness of said electrolyte powder layer, different in the different sites requirement as required, can prevent that air from entering the roasting groove and being advisable, usually be controlled in 2.5 ± 0.5cm scope.
3. according to claim 1 method is characterized in that the thickness of the electrolyte powder layer of described B step is 2.5 ± 0.5cm, specifically arranges can prevent that air from entering the roasting groove and being advisable.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668331A (en) * | 2013-11-29 | 2014-03-26 | 云南云铝润鑫铝业有限公司 | Method for effectively prolonging service life of aluminum electrolytic tank |
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| US20080023321A1 (en) * | 2006-07-31 | 2008-01-31 | Donald Sadoway | Apparatus for electrolysis of molten oxides |
| CN101550563A (en) * | 2009-05-13 | 2009-10-07 | 云南云铝润鑫铝业有限公司 | Electrolyzer circumfluence calcination method |
| CN101886274A (en) * | 2010-06-29 | 2010-11-17 | 云南云铝润鑫铝业有限公司 | Electric heating roasting preheating electrolytic bath and cleaning and roasting method |
| CN101914786A (en) * | 2010-07-05 | 2010-12-15 | 广西师范大学 | Titanium boride cathode coating paste for aluminum electrolysis, preparation method and coating method thereof |
| CN102304725A (en) * | 2011-09-16 | 2012-01-04 | 云南云铝润鑫铝业有限公司 | Electrolytic cathode containing titanium boride-carbon coating, and preparation method thereof |
| CN202272965U (en) * | 2011-09-06 | 2012-06-13 | 河南万基铝业股份有限公司 | Structure utilizing broken material to start electrolyzing tank |
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2012
- 2012-11-09 CN CN201210446491.3A patent/CN102912378B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2372257A (en) * | 1999-06-25 | 2002-08-21 | Bambour Olubukola Omoyiola | Extraction of aluminum and titanium |
| US20080023321A1 (en) * | 2006-07-31 | 2008-01-31 | Donald Sadoway | Apparatus for electrolysis of molten oxides |
| CN101550563A (en) * | 2009-05-13 | 2009-10-07 | 云南云铝润鑫铝业有限公司 | Electrolyzer circumfluence calcination method |
| CN101886274A (en) * | 2010-06-29 | 2010-11-17 | 云南云铝润鑫铝业有限公司 | Electric heating roasting preheating electrolytic bath and cleaning and roasting method |
| CN101914786A (en) * | 2010-07-05 | 2010-12-15 | 广西师范大学 | Titanium boride cathode coating paste for aluminum electrolysis, preparation method and coating method thereof |
| CN202272965U (en) * | 2011-09-06 | 2012-06-13 | 河南万基铝业股份有限公司 | Structure utilizing broken material to start electrolyzing tank |
| CN102304725A (en) * | 2011-09-16 | 2012-01-04 | 云南云铝润鑫铝业有限公司 | Electrolytic cathode containing titanium boride-carbon coating, and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103668331A (en) * | 2013-11-29 | 2014-03-26 | 云南云铝润鑫铝业有限公司 | Method for effectively prolonging service life of aluminum electrolytic tank |
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