CN102464345A - Method for producing sandy alumina by using nepheline - Google Patents
Method for producing sandy alumina by using nepheline Download PDFInfo
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- CN102464345A CN102464345A CN2010105476567A CN201010547656A CN102464345A CN 102464345 A CN102464345 A CN 102464345A CN 2010105476567 A CN2010105476567 A CN 2010105476567A CN 201010547656 A CN201010547656 A CN 201010547656A CN 102464345 A CN102464345 A CN 102464345A
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- nepheline
- white lake
- sandy alumina
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Abstract
The invention relates to a method for producing sandy alumina, in particular to a method for producing sandy alumina by using nepheline, which comprises the steps of: producing crude aluminium hydroxide from nepheline as a raw material by adopting a sintering method; and then producing the sandy alumina from the crude aluminium hydroxide by adopting a Bayer process. The invention has the advantages and beneficial effects that a serial connection production process for producing the sandy alumina by adopting sintering and Bayer processes is adopted, the sintering process is used for treating nepheline which can not be treated by adopting the Bayer process, the Bayer process is used for treating the crude aluminium hydroxide produced by adopting the sintering process, and by combining the sintering process with the Bayer process, the difficultly-treated nepheline is treated, and the alumina production with high quality is produced.
Description
Technical field
The present invention relates to a kind of method of producing sandy alumina, relate in particular to a kind of method of utilizing nepheline to produce sandy alumina.
Background technology
Present stage nepheline production method of alumina is main with sintering process.What sintering process adopted till now is that process for desiliconizing crude liquid obtained by sinter is handled, and the seminal fluid after the processing carries out the method that carbon divides and the sintering process kind is divided simultaneously.The quality product of this technology is lower, cannot satisfy the production requirement of sandy alumina.
Summary of the invention
The present invention provides a kind of method of utilizing nepheline to produce sandy alumina in order to solve the problems of the technologies described above, it is high-quality that its purpose utilizes nepheline to produce exactly, is easy to the sandy alumina product that current Aluminum Electrolysis Production needs.
For reaching above-mentioned purpose, the present invention is achieved in that a kind of method of utilizing nepheline to produce sandy alumina, is that raw material adopts the thick white lake of first sintering process output with the nepheline, thicker white lake is produced sandy alumina with Bayer process.
Described is that raw material adopts the thick white lake of first sintering process output to comprise nepheline and lime to be carried out the grog sintering, carry out the grog stripping again, separate and wash obtaining thick liquid after the grog stripping with the nepheline, and thick liquid carries out carbonating and decomposes and obtain thick white lake.
Described carbonation decomposition course adds carbonic acid gas; Carbonating is decomposed the sodium carbonate solution that is produced and is used for grog stripping step.
Describedly thick white lake is produced sandy alumina with Bayer process comprise thick white lake is carried out the low temperature stripping with the mixed liquid of alkali; The slurries of stripping obtain sodium aluminate solution after liquid-solid separating, washing slagging-off; Adding round-robin white lake is done seed and solution is lowered the temperature in sodium aluminate solution simultaneously, makes it carry out decomposition of crystal seed, obtains aluminum hydroxide precipitation; Aluminum hydroxide precipitation obtains white lake through separating, washing, again white lake is carried out obtaining sandy alumina after the roasting.
The mixed liquid of described alkali is that new alkali and aluminum hydroxide precipitation are through the resulting circulation alkali of separating, washing.
Described aluminum hydroxide precipitation obtains white lake through separating, washing and partly does seed and carry out decomposition of crystal seed.
Advantage of the present invention and effect are following:
The present invention has adopted sintering and Bayer process to prepare the series connection production technique of sandy alumina; Sintering process is handled the nepheline ore deposit that Bayer process can not be handled; Bayer process is handled the thick white lake of sintering process output; Reluctant nepheline ore deposit had both been handled in both combinations, had produced high-quality alumina product again.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Embodiment
Combine accompanying drawing to describe in detail in the face of embodiments of the invention down, but protection scope of the present invention is not limit by embodiment.
A kind of method of utilizing nepheline to produce sandy alumina as shown in Figure 1 is that raw material adopts the thick white lake of first sintering process output with the nepheline, thicker white lake is produced sandy alumina with Bayer process.
With the nepheline is that raw material adopts the thick white lake of first sintering process output; Comprise nepheline and lime are carried out the grog sintering, carry out the grog stripping again, the calcium-silicon slag of grog stripping is separated with hot water and washs; The separating, washing overflow is that thick liquid is sodium aluminate solution; The separating, washing underflow is a red mud, and thick liquid carries out the carbonating decomposition and obtains thick white lake, adds carbonic acid gas at carbonation decomposition course; Carbonating is decomposed the sodium carbonate solution that is produced and is divided two portions, and a part is through pervaporation, and another part is without evaporation, and both are used for grog stripping step behind the interflow.
Thick white lake is produced sandy alumina with Bayer process to be comprised thick white lake is carried out the low temperature stripping with the mixed liquid of alkali; The slurries of stripping obtain sodium aluminate solution after liquid-solid separating, washing slagging-off; Adding round-robin white lake is done seed and solution is lowered the temperature in sodium aluminate solution simultaneously; Make it carry out decomposition of crystal seed; Obtain aluminum hydroxide precipitation, aluminum hydroxide precipitation obtains white lake through separating, washing, again white lake is carried out obtaining sandy alumina after the roasting; The mixed liquid of alkali be new alkali and aluminum hydroxide precipitation through the resulting circulation alkali of separating, washing mixing solutions, aluminum hydroxide precipitation obtains white lake through separating, washing and partly does seed and carry out decomposition of crystal seed.
Claims (6)
1. a method of utilizing nepheline to produce sandy alumina is characterized in that with the nepheline being that raw material adopts the thick white lake of first sintering process output, thicker white lake is produced sandy alumina with Bayer process.
2. a kind of method of utilizing nepheline to produce sandy alumina according to claim 1; It is characterized in that with the nepheline being that raw material adopts the thick white lake of first sintering process output to comprise nepheline and lime are carried out the grog sintering; Carry out the grog stripping again; Separate and wash obtaining thick liquid after the grog stripping, thick liquid carries out the carbonating decomposition and obtains thick white lake.
3. a kind of method of utilizing nepheline to produce sandy alumina according to claim 2 is characterized in that described carbonation decomposition course adds carbonic acid gas; Carbonating is decomposed the sodium carbonate solution that is produced and is used for grog stripping step.
4. a kind of method of utilizing nepheline to produce sandy alumina according to claim 1; It is characterized in that describedly thick white lake is produced sandy alumina with Bayer process comprising thick white lake being carried out the low temperature stripping with the mixed liquid of alkali; The slurries of stripping obtain sodium aluminate solution after liquid-solid separating, washing slagging-off; Adding round-robin white lake is done seed and solution is lowered the temperature in sodium aluminate solution simultaneously, makes it carry out decomposition of crystal seed, obtains aluminum hydroxide precipitation; Aluminum hydroxide precipitation obtains white lake through separating, washing, again white lake is carried out obtaining sandy alumina after the roasting.
5. a kind of method of utilizing nepheline to produce sandy alumina according to claim 4, the mixed liquid that it is characterized in that described alkali are that new alkali and aluminum hydroxide precipitation are through the resulting circulation alkali of separating, washing.
6. a kind of method of utilizing nepheline to produce sandy alumina according to claim 4 is characterized in that described aluminum hydroxide precipitation obtains white lake through separating, washing and partly does seed and carry out decomposition of crystal seed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010547656 CN102464345B (en) | 2010-11-17 | 2010-11-17 | Method for producing sandy alumina by using nepheline |
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| CN 201010547656 CN102464345B (en) | 2010-11-17 | 2010-11-17 | Method for producing sandy alumina by using nepheline |
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| CN102464345A true CN102464345A (en) | 2012-05-23 |
| CN102464345B CN102464345B (en) | 2013-11-06 |
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| CN 201010547656 Active CN102464345B (en) | 2010-11-17 | 2010-11-17 | Method for producing sandy alumina by using nepheline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054207A (en) * | 2019-05-13 | 2019-07-26 | 贵州广铝氧化铝有限公司 | A kind of method of Bayer process production sandy alumina |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU460707A1 (en) * | 1973-03-29 | 1979-08-30 | Всесоюзный научно-исследовательский и проектный институт алюминиевой, магниевой и электродной промышленности | Process for the manufacture of aluminia |
| RU2043300C1 (en) * | 1992-11-20 | 1995-09-10 | Акционерное общество "Пикалевское объединение "Глинозем" | Method for production of alumina from nepheline materials |
| CN1562756A (en) * | 2004-03-19 | 2005-01-12 | 邝中 | Technique for extracting alumina from materiel containing calcium aluminate |
| CN101654267A (en) * | 2008-08-19 | 2010-02-24 | 沈阳铝镁设计研究院 | Method for preparing aluminum and coproducing cement from flyash |
| CN101654271A (en) * | 2008-08-19 | 2010-02-24 | 沈阳铝镁设计研究院 | Method for producing sandy alumina from crude liquid by sintering method |
| CN101845550A (en) * | 2010-04-12 | 2010-09-29 | 东北大学 | Method for extracting aluminum hydroxide and aluminum oxide from side product obtained by preparing magnesium metal by taking aluminum or aluminum alloy as reducing agent |
-
2010
- 2010-11-17 CN CN 201010547656 patent/CN102464345B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU460707A1 (en) * | 1973-03-29 | 1979-08-30 | Всесоюзный научно-исследовательский и проектный институт алюминиевой, магниевой и электродной промышленности | Process for the manufacture of aluminia |
| RU2043300C1 (en) * | 1992-11-20 | 1995-09-10 | Акционерное общество "Пикалевское объединение "Глинозем" | Method for production of alumina from nepheline materials |
| CN1562756A (en) * | 2004-03-19 | 2005-01-12 | 邝中 | Technique for extracting alumina from materiel containing calcium aluminate |
| CN101654267A (en) * | 2008-08-19 | 2010-02-24 | 沈阳铝镁设计研究院 | Method for preparing aluminum and coproducing cement from flyash |
| CN101654271A (en) * | 2008-08-19 | 2010-02-24 | 沈阳铝镁设计研究院 | Method for producing sandy alumina from crude liquid by sintering method |
| CN101845550A (en) * | 2010-04-12 | 2010-09-29 | 东北大学 | Method for extracting aluminum hydroxide and aluminum oxide from side product obtained by preparing magnesium metal by taking aluminum or aluminum alloy as reducing agent |
Non-Patent Citations (2)
| Title |
|---|
| 冶金工业出版社《中国冶金百科全书》编辑部: "《中国冶金百科全书：有色金属冶金》", 31 January 1999, article "霞石", pages: 899 * |
| 刘战伟等: "霞石矿在氧化铝工业中的应用", 《轻金属》, no. 12, 31 December 2008 (2008-12-31), pages 10 - 13 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054207A (en) * | 2019-05-13 | 2019-07-26 | 贵州广铝氧化铝有限公司 | A kind of method of Bayer process production sandy alumina |
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| CN102464345B (en) | 2013-11-06 |
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