CN203174212U - Tungsten cathode and electrolysis device comprising same - Google Patents
Tungsten cathode and electrolysis device comprising same Download PDFInfo
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- CN203174212U CN203174212U CN 201220671861 CN201220671861U CN203174212U CN 203174212 U CN203174212 U CN 203174212U CN 201220671861 CN201220671861 CN 201220671861 CN 201220671861 U CN201220671861 U CN 201220671861U CN 203174212 U CN203174212 U CN 203174212U
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Abstract
The utility model relates to a tungsten cathode and an electrolysis device comprising the same. The tungsten cathode is provided with a projection, the cross section area of the projection is increased relative to a body, so that the corrosion resistance of the tungsten cathode can be improved and the service life of the tungsten cathode can be prolonged under the circumstance that the conventional rare earth fused salt electrolysis furnace has no need of any change. Compared with the conventional tungsten cathode, the service life of the tungsten cathode can be prolonged by more than 20%.
Description
Technical field
The electrolyzer that the utility model relates to a kind of tungsten cathode and comprises this tungsten cathode.Especially, this tungsten cathode is the tungsten cathode in the rare earth molten-salt electrolysis stove.
Background technology
Thulium is considerable advantage resource and the strategic resource of China, and it is widely used in every field, have " industrial monosodium glutamate ", " industrial gold ", " mother's of novel material " good reputation.Rare earth element is active very strong metal, is difficult to extract from its compound with general method under usual conditions.Fused salt electrolysis process is the main method for preparing rare earth metal and alloy thereof at present.Fused salt electrolysis process is divided into fused salt chlorimation thing electrolytic process and fused salt oxide electrolysis method.Because high volatile volatile and rare earth metal solubleness in its molten chloride of molten chloride are very big, cause the power consumption height, current efficiency is low, yield is low, electrolytic process produces a large amount of chlorine simultaneously, environment is caused severe contamination, therefore, the electrolysis of chloride technology arena of history that fades out gradually, what replace is fluoride molten salt system oxide electrolysis technology.
Fused salt oxide electrolysis method can be produced nearly all rare earth metal and alloy thereof, is the main method that rare earth metal is produced.The main fused salt oxide electrolysis legal system that adopts is got single light rare earth metal and noriums such as lanthanum, cerium, praseodymium, neodymium in the industrial production.
Fused salt oxide electrolysis method is produced rare earth metal, needs to adopt infusibility and noncorroding metal negative electrode, generally adopts tungsten bar or molybdenum bar as negative electrode, and graphite is made anode.The temperature of molten electrolyte is generally 1000-1400 ℃, for example, the negative electrode working temperature that electrolysis rare-earth oxidation neodymium is produced neodymium metal is 1000～1100 ℃, and tungsten and molybdenum material has good erosion resistance under this type of medium and high temperature, so become the preferred material of negative electrode.Because molybdenum negative electrode erosion resistance in ionogen is poor, it is fast to consume, the molybdenum that is corroded makes the molybdenum content overproof after entering rare-earth products, therefore in order to satisfy the client to the requirement of foreign matter content in the product, molybdenum electrode is eliminated gradually, and tungsten becomes the first-selection of fused salt electrolysis rare earth negative electrode owing to have the erosion resistance stronger than molybdenum.
During fused salt oxide electrolysis, electrolytic solution adopts fluorochemical-oxide compound fused salt, Faradaic current is generally up to about 3000-10000A, electrolyte temperature reaches as high as 1400 ℃, under this condition, the tungsten cathode working condition is very abominable, be inserted in electrolysis liquid surface and be difficult for oxidation with the lower section, and be exposed to tungsten cathode position more than the fused salt liquid level particularly near the position of fused salt liquid level, its temperature is the highest, owing to be subjected to the effect of fire door air-flow, oxygenizement is very strong, causing this position corrosion the most serious, is the topmost failure mode of tungsten cathode.Tungsten cathode corrosion back causes whole of tungsten cathode to be scrapped because attenuating or rupturing, even tungsten cathode is turned around to use, its work-ing life still can not be above 1 year.Tungsten belongs to rare metal, and is expensive, and frequently changing tungsten cathode has increased production cost, has influenced production efficiency.
The utility model content
The purpose of this utility model is exactly the problems referred to above that exist when solving rare earth molten-salt electrolysis.
The utility model provides new departure of a kind of fused salt electrolysis tungsten cathode, does not need the fused salt electrolysis stove is done any change, only needs by at the tungsten cathode body protuberance method being set, and just reaches and delays the tungsten cathode purpose in work-ing life.Should be understood that in use protuberance does not contact with liquid level more than liquid level.
Particularly, the utility model provides a kind of tungsten cathode that is the step shaft form, it is characterized in that, this negative electrode have body and
Be arranged on one or two protuberance on the body,
The cross-sectional area of this protuberance is bigger than the cross-sectional area of body.
In one embodiment, the cross-sectional area of described protuberance is bigger more than 10% than the cross-sectional area of body.
In a preferred embodiment, the cross-sectional area of described protuberance is than the big 10%-60% of cross-sectional area of body.
In a preferred embodiment, this negative electrode has two protuberances.
In a preferred embodiment, described protuberance is arranged on the non-terminal position of body.Should be understood that described non-terminal position refers to terminal any position in addition on the tungsten cathode.
In a preferred embodiment, described body and protuberance all are cylindrical.
In a preferred embodiment, described two protuberances are symmetrical distribution with respect to the center of body.
In a preferred embodiment, described two protuberances are asymmetric distribution with respect to the center of body.
In a preferred embodiment, the cross-sectional area of two protuberances is identical or different.
The utility model also relates to a kind of electrolyzer, and it comprises aforesaid tungsten cathode.
Adopt solution of the present utility model can significantly improve the work-ing life of tungsten cathode.Through experiment, single head work-ing life is more than 8 months, prolongs 1-3 month work-ing life than the tungsten cathode of prior art, and double end work-ing life (namely being provided with under two outstanding situations at body) is for approximately more than a year and a half, prolongs 2-6 month than the negative electrode of prior art.Because only the protuberance to tungsten cathode has increased diameter, cost increases≤5%, surpasses more than 20% and prolong work-ing life.
Description of drawings
Fig. 1 is the synoptic diagram of a preferred embodiment of the present utility model;
Fig. 2 is the synoptic diagram of another embodiment of the present utility model.
Embodiment
Fig. 1 shows the synoptic diagram of a preferred embodiment of the present utility model.Tungsten cathode is the step shaft form, comprises body 1 and the protuberance 2 of symmetric arrangement on body 1.
Can be in fused salt electrolysis liquid when should be understood that the work of the thin position (being body) of tungsten cathode two ends diameter.When reality was used, when an end immersed in the fused salt electrolysis liquid (protuberance that is positioned at this end is positioned at more than the liquid level, contact with liquid level), the other end was used for the former electric installation of connection fused salt electrolysis stove.Because protuberance is symmetrical distribution, can turn around to use.
Near or when reaching work-ing life when tungsten cathode one termination, tungsten cathode unloaded to turn around to reinstall can continue to use, its performance is identical with work-ing life and the other end.
Fig. 2 shows the synoptic diagram of an embodiment of the present utility model, and tungsten cathode has body 1, and this body 1 is provided with protuberance 2, and the cross-sectional area of protuberance 2 is greater than the cross-sectional area of body.In use, protuberance is positioned at more than the liquid level, does not contact with liquid level.Adopt this tungsten cathode also can reach the purpose that improves work-ing life.
Those skilled in the art can suitably change and change diameter and length on the basis of above given embodiment, and these do not break away from scope of the present utility model.
Claims (10)
1. a tungsten cathode that is the step shaft form is characterized in that, this tungsten cathode have body and
Be arranged on one or two protuberance on the body,
The cross-sectional area of this protuberance is bigger than the cross-sectional area of body.
2. tungsten cathode according to claim 1, the cross-sectional area of wherein said protuberance is bigger more than 10% than the cross-sectional area of body.
3. tungsten cathode according to claim 1, the cross-sectional area of wherein said protuberance is than the big 10%-60% of cross-sectional area of body.
4. according to each described tungsten cathode among the claim 1-3, wherein this negative electrode has two protuberances.
5. according to each described tungsten cathode among the claim 1-3, wherein said protuberance is arranged on the non-terminal position of body.
6. according to each described tungsten cathode among the claim 1-3, wherein said body and protuberance all are cylindrical.
7. tungsten cathode according to claim 4, wherein said two protuberances are symmetrical distribution with respect to the center of body.
8. tungsten cathode according to claim 4, wherein said two protuberances are asymmetric distribution with respect to the center of body.
9. tungsten cathode according to claim 4, wherein the cross-sectional area of two protuberances is identical or different.
10. electrolyzer, it comprises according to each described tungsten cathode among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220671861 CN203174212U (en) | 2012-12-07 | 2012-12-07 | Tungsten cathode and electrolysis device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220671861 CN203174212U (en) | 2012-12-07 | 2012-12-07 | Tungsten cathode and electrolysis device comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN203174212U true CN203174212U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220671861 Expired - Fee Related CN203174212U (en) | 2012-12-07 | 2012-12-07 | Tungsten cathode and electrolysis device comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867798A (en) * | 2014-02-25 | 2015-08-26 | 上海亚尔光源有限公司 | Method for manufacturing electrode used by metal halide lamp |
-
2012
- 2012-12-07 CN CN 201220671861 patent/CN203174212U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867798A (en) * | 2014-02-25 | 2015-08-26 | 上海亚尔光源有限公司 | Method for manufacturing electrode used by metal halide lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The industrial zone in Beijing city called 101117 Tongzhou District Lucheng town Patentee after: BEIJING TIAN-LONG TUNGSTEN & MOLYBDENUM Co.,Ltd. Address before: The industrial zone in Beijing city called 101117 Tongzhou District Lucheng town Patentee before: BEIJING TIAN-LONG TUNGSTEN & MOLYBDENUM Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The industrial zone in Beijing city called 101117 Tongzhou District Lucheng town Patentee after: ATTL ADVANCED MATERIALS Co.,Ltd. Address before: The industrial zone in Beijing city called 101117 Tongzhou District Lucheng town Patentee before: BEIJING TIAN-LONG TUNGSTEN & MOLYBDENUM Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20211207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |