CN101649468A - Roasting start method of electrolyte block of aluminum electrolysis bath - Google Patents
Roasting start method of electrolyte block of aluminum electrolysis bath Download PDFInfo
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- CN101649468A CN101649468A CN200910066114A CN200910066114A CN101649468A CN 101649468 A CN101649468 A CN 101649468A CN 200910066114 A CN200910066114 A CN 200910066114A CN 200910066114 A CN200910066114 A CN 200910066114A CN 101649468 A CN101649468 A CN 101649468A
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Abstract
The invention discloses a roasting start method of electrolyte blocks of an aluminum electrolysis bath. Based on the prior cryolite roasting art, the technical scheme of the method is achieved by thefollowing steps: all cryolites in stove charge material, which is originally used for the lateral part before the electrolysis bath is electrified and started, are regulated into the electrolyte blocks; all the electrolyte blocks are used to culture the electrolysis bath used for culturing electrolyte; 1 ton of sodium fluoride ingredients contained in the original stove charge material are also regulated into about 800 kilograms of soda ash; and 800 kilograms of calcium fluoride contained in the original stove charge material is reduced to 200-300 kilograms to ensure electrolyte ingredients tobe unchanged after the electrolysis bath is started so as to achieve the purpose of normal starting; in addition, the method can stably transit to a later period and manage the later period, so thatthe electrolyte blocks can be periodically and circularly used, thereby achieving the purpose of energy saving and consumption reduction. Since the electrolyte blocks are circularly used during roasting start, the invention not only realizes the normal roasting start of the electrolysis bath and saves a large quantity of the cryolites, but also effectively solves the problem of the generation of alarge quantity of the electrolyte in the electrolytic production process, reduces the stock and the production cost.
Description
Technical field:
The present invention relates to a kind of energy saving and cost lowering method, particularly relate to a kind of method of electrolyte block of aluminum electrolysis bath roasting and starting.
Background technology:
Saving energy and reduce the cost and reducing production costs is the theme that an enterprise is pursued, and the electrolysis of aluminum industry itself is exactly a highly energy-consuming manufacturing enterprise, and how to reduce cost also is the research object of each aluminum electrolysis industry.Electrolyte block of aluminum electrolysis bath roasting and starting technology is a kind of modified form roasting and starting of electrolyzer technology, it also is a necessary process before electrolyzer puts into production, the sodium aluminum fluoride usage quantity is huge in the traditional sodium aluminum fluoride roasting and starting in this process, take substantial contribution, only an electrolyzer uses the sodium aluminum fluoride amount to need about 35 tons, is worth about 280,000 yuan according to present price.Sodium Fluoride also is expensive fluoride salt in addition, therefore electrolyzer overhaul once or new groove start once required input just up to 800,000 yuan, the series scale is gone into operation and is expended huge fund, can seek a kind of substitution goods, good and cheap, be the common pursuit of each enterprise for enterprise reduces production costs.
Electrolyte block is a kind of by product in the electrolysis production, in ordinary production owing to stablize molecular ratio in the ordinary production, need to add a large amount of aluminum fluorides, in electrolyzer and aluminum oxide and sodium aluminum fluoride liquid generation combination reaction, produces a large amount of superfluous ionogen, be deposited in the cell room after the taking-up in the groove through a kind of instrument, cumulative, utility value is not high, and cyclic utilization rate is not high in the society, produces superfluous waste.Because its composition is identical with electrolyte ingredient in the ordinary production, can satisfy calcination startup demand by adjusting its composition, therefore adopt electrolyte block roasting and starting technology to help utilizing refuse, save a large amount of purchase fluoride salt costs, reduce and produce input cost, kill two birds with one stone, not only reduced production cost and utilized refuse again, reached the purpose that this net income increase falls in enterprise.
Summary of the invention:
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, a kind of method of electrolyte block of aluminum electrolysis bath roasting and starting technology is provided, make full use of the by product electrolyte block in the electrolysis production, not only reduced production cost and utilized refuse again, in the calcination start-up course, greatly reduced production cost than traditional technology.
The technical scheme that the present invention is taked for the technical solution problem is:
A kind of method of electrolyte block of aluminum electrolysis bath roasting and starting comprises conventional production method, and its concrete technical parameter is as follows:
A, the sodium aluminum fluoride that original sidepiece in the shove charge material before the electrolyzer energising startup is used all are adjusted into electrolyte block, and the sodium aluminum fluoride furnace burdening that is about to 3～5 tons of original sidepieces is adjusted to and uses 2～3 tons electrolyte block, highly is controlled at 20～30cm;
B, the composition of 1 ton of Sodium Fluoride in original shove charge material is adjusted into soda ash about 800kg;
C, the 800kg Calcium Fluoride (Fluorspan) in original shove charge material is reduced to 200～300kg;
D, will cultivate electrolytical electrolyzer and all use electrolyte block to cultivate, the separate unit electrolyzer is cultivated about 4～5 tons high temperature (about 975 ℃) electrolytic liquid; Add 200～300kg soda ash in the culturing process and adjust the electrolytical molecular ratio of cultivation;
E, startup back replenish the broken electrolyte block of 200～300kg every day and use to satisfy the later stage in the process of later stage conversion in groove, finish until the transitional period;
F, other original furnace burdening remain unchanged, and mulch still adopts sodium aluminum fluoride to be incubated on the electrode.
Positive beneficial effect of the present invention is:
1. the method for electrolyte block of aluminum electrolysis bath roasting and starting of the present invention, it is transformed on the basis of traditional electrolyzer sodium aluminum fluoride roast starting process, use by the collocation of adjusting electrolyte block and other material, the components unchanged of assurance and the required electrolytic liquid of sodium aluminum fluoride roasting and starting technology has effectively been sought alternative product.
2. because the present invention has kept on the basis of original roasting and starting in inheriting tradition aluminium cell sodium aluminum fluoride roast starting process, by adjustment to adding materials, by sodium aluminum fluoride is adjusted electrolyte block, by Sodium Fluoride is adjusted into soda ash, reach the identical purpose of electrolyte ingredient behind the electrobath start; Effectively utilized the byproduct electrolyte block in producing in addition, a large amount of electrolyte blocks that use behind electrolytic cell overhaul and in the series startup, not only effectively utilized waste and old material, saved a large amount of production infusion of financial resourcess, separate unit electrolyzer only direct saving of electrolyte block is injected capital into 200,000 yuan, other reduces the usage quantity of Calcium Fluoride (Fluorspan) and Sodium Fluoride in addition, and the separate unit electrolyzer falls originally and achieves noticeable achievement.
Embodiment:
Embodiment: a kind of method of electrolyte block of aluminum electrolysis bath roasting and starting, comprise conventional production method, its concrete technical parameter is as follows:
A, the sodium aluminum fluoride that original sidepiece in the shove charge material before the electrolyzer energising startup is used all are adjusted into electrolyte block, and the sodium aluminum fluoride furnace burdening that is about to 3～5 tons of original sidepieces is adjusted to and uses 2～3 tons electrolyte block, highly is controlled at 20～30cm;
B, the composition of 1 ton of Sodium Fluoride in original shove charge material is adjusted into soda ash about 800kg;
C, the 800kg Calcium Fluoride (Fluorspan) in original shove charge material is reduced to 200～300kg;
D, will cultivate electrolytical electrolyzer and all use electrolyte block to cultivate, the separate unit electrolyzer is cultivated about 4～5 tons high temperature (about 975 ℃) electrolytic liquid; Add 200～300kg soda ash in the culturing process and adjust the electrolytical molecular ratio of cultivation;
E, startup back replenish the broken electrolyte block of 200～300kg every day and use to satisfy the later stage in the process of later stage conversion in groove, finish until the transitional period;
F, other original furnace burdening remain unchanged, and mulch still adopts sodium aluminum fluoride to be incubated on the electrode.
In the present invention: the technology of Xiang Ximiaoshuing partly is not known technology, and the those of ordinary skill of the industry is all clear.
Claims (2)
1. the method for an electrolyte block of aluminum electrolysis bath roasting and starting comprises conventional production method, and mulch adopts sodium aluminum fluoride to be incubated on the electrode, it is characterized in that:
A, the sodium aluminum fluoride that original sidepiece in the shove charge material before the electrolyzer energising startup is used all are adjusted into electrolyte block, and the sodium aluminum fluoride furnace burdening that is about to 3～5 tons of original sidepieces is adjusted to and uses 2～3 tons electrolyte block, highly is controlled at 20～30cm;
B, the composition of 1 ton of Sodium Fluoride in original shove charge material is adjusted into soda ash about 800kg;
C, the 800kg Calcium Fluoride (Fluorspan) in original shove charge material is reduced to 200～300kg;
D, will cultivate electrolytical electrolyzer and all use electrolyte block to cultivate, the separate unit electrolyzer is cultivated about 4～5 tons high-temperature electrolysis matter liquid; Add 200～300kg soda ash in the culturing process and adjust the electrolytical molecular ratio of cultivation;
E, startup back replenish the broken electrolyte block of 200～300kg every day and use to satisfy the later stage in the process of later stage conversion in groove, finish until the transitional period;
F, other original furnace burdening remain unchanged, and mulch still adopts sodium aluminum fluoride to be incubated on the electrode.
2, the method for electrolyte block of aluminum electrolysis bath roasting and starting according to claim 1 is characterized in that: in " D ", the temperature of described high-temperature electrolysis matter liquid is about 975 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910066114A CN101649468A (en) | 2009-09-10 | 2009-09-10 | Roasting start method of electrolyte block of aluminum electrolysis bath |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910066114A CN101649468A (en) | 2009-09-10 | 2009-09-10 | Roasting start method of electrolyte block of aluminum electrolysis bath |
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| CN101649468A true CN101649468A (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910066114A Pending CN101649468A (en) | 2009-09-10 | 2009-09-10 | Roasting start method of electrolyte block of aluminum electrolysis bath |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908216A (en) * | 2016-06-24 | 2016-08-31 | 登封电厂集团铝合金有限公司 | Method for starting roasting of electrolytes of aluminum cell |
| CN106062541A (en) * | 2015-02-04 | 2016-10-26 | 俄罗斯工程技术中心 | Method for determining the composition and cryolite ratio of solid samples of potassium-containing electrolyte in aluminium production by XRD |
-
2009
- 2009-09-10 CN CN200910066114A patent/CN101649468A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106062541A (en) * | 2015-02-04 | 2016-10-26 | 俄罗斯工程技术中心 | Method for determining the composition and cryolite ratio of solid samples of potassium-containing electrolyte in aluminium production by XRD |
| CN106062541B (en) * | 2015-02-04 | 2019-04-30 | 俄铝工程技术中心有限责任公司 | The method for measuring the composition and cryolite ratio of the solid sample of electrolyte containing potassium |
| CN105908216A (en) * | 2016-06-24 | 2016-08-31 | 登封电厂集团铝合金有限公司 | Method for starting roasting of electrolytes of aluminum cell |
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Application publication date: 20100217 |