CN102304725A - Electrolytic cathode containing titanium boride-carbon coating, and preparation method thereof - Google Patents
Electrolytic cathode containing titanium boride-carbon coating, and preparation method thereof Download PDFInfo
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- CN102304725A CN102304725A CN201110274580A CN201110274580A CN102304725A CN 102304725 A CN102304725 A CN 102304725A CN 201110274580 A CN201110274580 A CN 201110274580A CN 201110274580 A CN201110274580 A CN 201110274580A CN 102304725 A CN102304725 A CN 102304725A
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Abstract
The invention discloses an electrolytic cathode containing a titanium boride-carbon coating, and a preparation method thereof. The electrolytic cathode is characterized in that: a coating is coated on the surface of the electrolytic cathode, wherein the coating comprises components of, by mass: 20 to 22% of TiB2, 15 to 20% of epoxy resin, 24 to 27% of diethylene triamine, 0.3 to 0.8% of carbon fiber, and balance of graphite powder. The preparation method of the aluminum electrolytic cathode comprises steps that: the materials are sufficiently mixed and uniformly coated on the surface of the electrolytic cathode; the coating is heated from normal temperature to 150 DEG C, such that the coating is cured, and the electrolytic cathode containing the titanium boride-carbon coating is obtained. According to the invention, good wettability of aluminum liquid and the electrolytic cathode is utilized, such that aluminum oxide deposition is not easy to be left on the surface of the electrolytic cathode. Therefore, deposition or crusting is not easy to occur, current is uniformly distributed, disturbance of magnetic fields to the aluminum liquid is reduced, current efficiency is improved, energy consumption is reduced, the service life of an electrolyte tank is prolonged, and aluminum liquid level and polar pitch can be appropriately reduced. With the electrolytic cathode provided by the invention, an average working voltage and a secondary reaction probability of the aluminum electrolyte tank are reduced, aluminum electrolytic production is improved, and the quality of aluminum products is improved.
Description
Technical field
The present invention relates to a kind of electrolysis cathode, particularly a kind of electrolysis cathode with titanium boride-carbon coating belongs to the electrolysis tech field.
Background technology
Sodium aluminum fluoride-alumina molten salt electrolysis method is the unique smelting process of current aluminium industry, and existing carbon cathode is nonwetting to molten metal aluminium, in order to keep the steady of molten metal aluminium cathode surface; Must retain the aluminium liquid of suitable thickness in the existing aluminium cell,, receive the effect of high-intensity magnetic field because of metal aluminium liquid is the conductive fluid in the groove; Induction produces electromagnetic force in the conductive fluid; Aluminium liquid is produced flow, fluctuate and protuberance, this not only makes must keep higher pole span between cathode and anode, increases the secondary reaction loss of aluminium; Current efficiency is reduced, increase unit dc consumption.In addition, carbon cathode surface is prone to form the bottom land deposition, causes that cathode drop increases, distribution of current is uneven, produces unstablely, finally causes the expansion, breakage of negative electrode etc., has influenced the ordinary life of electrolyzer.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency that prior art exists, a kind of boron that has is provided
Electrolysis cathode of change titanium-carbon coating and preparation method thereof to realize the low pole span operation of electrolysis of aluminum, improves the wettability of carbon cathode to molten metal aluminium, reaches raising current efficiency, cuts down the consumption of energy, prolongs the electrolyzer purpose in work-ing life.
The present invention is to provide a kind of like this electrolysis cathode with titanium boride-carbon coating, comprise negative electrode, it is characterized in that, cathode surface scribbles the coating that its composition is following mass percent: TiB
220～22 %, epoxy resin 15～20 %, diethylenetriamine 24～27 %, thomel 0.3～0.8 %, surplus is a Graphite Powder 99.
The thickness of said coating is 3～8mm.
Aluminium electrolysis cathode provided by the invention prepares through following process steps:
A, get the raw materials ready: TiB by following mass percent
220～22 %, epoxy resin 15～20 %, diethylenetriamine 24～27 %, thomel 0.3～0.8 %, surplus is a Graphite Powder 99;
Behind B, the raw material thorough mixing with steps A, evenly be applied to cathode surface, its coat-thickness is 3～8mm, gets surperficial cated negative electrode;
C, step B gained negative electrode is heating and curing according to following method: reach 100 ℃ from normal temperature heating 4 ± 0.2 hours to temperature; 100 ± 2 ℃ of following roastings 4 hours; Be heated to 150 ℃ afterwards, make coating curing, promptly obtain having the electrolysis cathode of titanium boride-carbon coating.
The heating of said step C, roasting are carried out in conventional stoving oven.
The present invention compared with prior art has advantage and beneficial effect:
(1) applies titanium boride-carbon coating at aluminium cell groove, expansion joint and cathode surface; Reduce on the one hand aluminium liquid from the expansion joint seepage; Make full use of the good wettability of aluminium liquid and negative electrode on the other hand; Can reduce anticathode infiltration of ionogen and sodium Metal 99.5 and destruction, to improve the work-ing life of electrolyzer.
(2) utilize molten aluminum liquid and the titanium boride cathode surface can be wetting well; Can effectively weaken aluminium fluid wave this character of crest due to moving; Suitably reduce aluminium level and pole span, help reducing aluminium cell average working voltage and secondary reaction probability, improve the aluminum electrolysis economic and technical norms.
(3) use titanium boride-regular aluminum cell hearth of carbon coating technology ability.Because the moistening enough well inert cathode of aluminium fluid power makes the interior precipitation of alumina thing of electrolyzer be difficult for resting on cathode surface, thereby is difficult for generating deposition or crust at cathode surface; Can make burner hearth regular; Make distribution of current even, reduce the disturbance of magnetic field, slow down the secondary reaction process aluminium liquid; Improve current efficiency, also can improve the quality of aluminium.Bearth precipitation and incrustive minimizing make the furnace bottom volts lost reduce, and effectively cut down the consumption of energy.
Description of drawings
Fig. 1 is the cure profile figure of titanium boride-carbon coating.
Embodiment
Below through embodiment and combine accompanying drawing that the present invention is described further.
Embodiment 1
The concrete preparation process of titanium boride-carbon coating is following:
A, get the raw materials ready by following composition: titanium boride 2kg, epoxy resin 2 kg, diethylenetriamine 2.4 kg, thomel 0.5 kg, Graphite Powder 99 3.1 kg, gross weight be the raw material of 10kg, graphite, titanium boride, thomel are put into container, stir, solid materials; With the diethylenetriamine fluid container of packing into, add epoxy resin, stir, liquid material; Slowly pour solid materials in the liquid material, stir while adding, until solid materials fully equably mixed dissolution in liquid material, so just form titanium boride-carbon coating;
B, titanium boride-carbon coating that steps A is prepared are coated in whole cathode surface uniformly, and thickness is 3mm, dip in the floating surface of a little diethylenetriamine, make whole exquisiteness, smooth, smooth;
C, as shown in Figure 1 puts into stoving oven with the negative electrode that step B makes, and is heated to 100 ℃ through 4h from normal temperature, at 100 ± 2 ℃ of roasting 4h, is heated to 150 ℃ then, makes coating curing, promptly obtains having the electrolysis cathode of titanium boride-carbon coating.
Embodiment 2
The concrete preparation process of titanium boride-carbon coating is following:
A, get the raw materials ready by following composition: titanium boride 2.2 kg, epoxy resin 1.5 kg, diethylenetriamine 2.4 kg, thomel 0.8 kg, Graphite Powder 99 3.1 kg, gross weight be the raw material of 10kg; Graphite, titanium boride, thomel are put into container, stir, get solid materials; With the diethylenetriamine fluid container of packing into, add epoxy resin, stir, liquid material; Slowly pour solid materials in the liquid material, stir while adding, until solid materials fully equably mixed dissolution in liquid material, thereby form titanium boride coating;
B, titanium boride-carbon coating that steps A is prepared are coated in whole cathode surface uniformly, and thickness is 8mm, dip in the floating surface of a little diethylenetriamine, make whole exquisiteness, smooth, smooth;
C, as shown in Figure 1 puts into stoving oven with the negative electrode that step B makes, and is heated to 100 ℃ through 4h from normal temperature, at 100 ± 2 ℃ of roasting 4h, is heated to 150 ℃ then, makes coating curing, promptly obtains having the electrolysis cathode of titanium boride-carbon coating.
Embodiment 3
The concrete preparation process of titanium boride-carbon coating is following:
A, get the raw materials ready by following composition: titanium boride 2.1 kg, epoxy resin 1.7 kg, diethylenetriamine 2.5 kg, thomel 0.3 kg, Graphite Powder 99 3.4 kg, gross weight be the raw material of 10kg; Graphite, titanium boride, thomel are put into container, stir, get solid materials; With the diethylenetriamine fluid container of packing into, add epoxy resin, stir, liquid material; Slowly pour solid materials in the liquid material, stir while adding, until solid materials fully equably mixed dissolution in liquid material, thereby form titanium boride coating;
B, titanium boride-carbon coating that steps A is prepared are coated in whole cathode surface uniformly, and thickness is 5mm, dip in the floating surface of a little diethylenetriamine, make whole exquisiteness, smooth, smooth;
C, as shown in Figure 1 puts into stoving oven with the negative electrode that step B makes, and is heated to 100 ℃ through 4h from normal temperature, at 100 ± 2 ℃ of roasting 4h, is heated to 150 ℃ then, makes coating curing, promptly obtains having the electrolysis cathode of titanium boride-carbon coating.
Claims (3)
1. the electrolysis cathode with titanium boride-carbon coating comprises negative electrode, it is characterized in that, cathode surface scribbles the coating that its composition is following mass percent: TiB
220～22 %, epoxy resin 15～20 %, diethylenetriamine 24～27 %, thomel 0.3～0.8 %, surplus is a Graphite Powder 99.
2. electrolysis cathode according to claim 1, the thickness that it is characterized in that said coating is 3～8mm.
3.
A kind of preparation method of aluminium electrolysis cathode according to claim 1 or claim 2 is characterized in that through following process steps:
A, get the raw materials ready: TiB by following mass percent
220～22 %, epoxy resin 15～20 %, diethylenetriamine 24～27 %, thomel 0.3～0.8 %, surplus is a Graphite Powder 99;
Behind B, the raw material thorough mixing with steps A, evenly be applied to cathode surface, its coat-thickness is 3～8mm, gets surperficial cated negative electrode;
C, step B gained negative electrode is heating and curing according to following method: reach 100 ℃ from normal temperature heating 4 ± 0.2 hours to temperature; 100 ± 2 ℃ of following roastings 4 hours; Be heated to 150 ℃ afterwards, make coating curing, promptly obtain having the electrolysis cathode of titanium boride-carbon coating.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531657A (en) * | 2012-01-05 | 2012-07-04 | 武汉理工大学 | Method for preparing TiB2-Csf-Carbon composite material |
| CN102719097A (en) * | 2012-07-06 | 2012-10-10 | 苏州大学 | Titanium diboride oxide/thermosetting resin composite material and preparation method thereof |
| CN102912378A (en) * | 2012-11-09 | 2013-02-06 | 云南云铝润鑫铝业有限公司 | Aluminium cell titanium boride coating thermal curing and charring method |
| CN103194101A (en) * | 2013-03-27 | 2013-07-10 | 江苏联合金陶特种材料科技有限公司 | Titanium boride-based coating composite material for aluminum electrolysis, preparation method and coating method thereof |
| WO2013177846A1 (en) * | 2012-05-30 | 2013-12-05 | 深圳市新星轻合金材料股份有限公司 | Process for preparing transition metal boride and application thereof |
| 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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| CN1807693A (en) * | 2005-12-26 | 2006-07-26 | 石忠宁 | Aluminium electrolysis cathode with titanium diboride coating and preparation process thereof |
| CN101148549A (en) * | 2006-09-20 | 2008-03-26 | 中国科学院金属研究所 | Electrically-conducting paint based on TiB2 and its preparation method and application |
| CN101876079A (en) * | 2010-06-13 | 2010-11-03 | 中国铝业股份有限公司 | Titanium boride cathode material for aluminium electrolysis and preparation method thereof |
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2011
- 2011-09-16 CN CN 201110274580 patent/CN102304725B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807693A (en) * | 2005-12-26 | 2006-07-26 | 石忠宁 | Aluminium electrolysis cathode with titanium diboride coating and preparation process thereof |
| CN101148549A (en) * | 2006-09-20 | 2008-03-26 | 中国科学院金属研究所 | Electrically-conducting paint based on TiB2 and its preparation method and application |
| CN101876079A (en) * | 2010-06-13 | 2010-11-03 | 中国铝业股份有限公司 | Titanium boride cathode material for aluminium electrolysis and preparation method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531657A (en) * | 2012-01-05 | 2012-07-04 | 武汉理工大学 | Method for preparing TiB2-Csf-Carbon composite material |
| CN102531657B (en) * | 2012-01-05 | 2013-11-20 | 武汉理工大学 | Method for preparing TiB2-Csf-Carbon composite material |
| WO2013177846A1 (en) * | 2012-05-30 | 2013-12-05 | 深圳市新星轻合金材料股份有限公司 | Process for preparing transition metal boride and application thereof |
| CN102719097A (en) * | 2012-07-06 | 2012-10-10 | 苏州大学 | Titanium diboride oxide/thermosetting resin composite material and preparation method thereof |
| CN102719097B (en) * | 2012-07-06 | 2014-10-08 | 苏州大学 | Titanium diboride oxide/thermosetting resin composite material and preparation method thereof |
| CN102912378A (en) * | 2012-11-09 | 2013-02-06 | 云南云铝润鑫铝业有限公司 | Aluminium cell titanium boride coating thermal curing and charring method |
| CN102912378B (en) * | 2012-11-09 | 2015-08-05 | 云南云铝润鑫铝业有限公司 | A kind of aluminium cell titanium boride coating is heating and curing and charing method |
| CN103194101A (en) * | 2013-03-27 | 2013-07-10 | 江苏联合金陶特种材料科技有限公司 | Titanium boride-based coating composite material for aluminum electrolysis, preparation method and coating method thereof |
| CN103194101B (en) * | 2013-03-27 | 2016-03-09 | 江苏联合金陶特种材料科技有限公司 | A kind of titanium boride base coating composite material used for aluminium electrolysis and preparation method thereof, coating method |
| 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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