CA2556439A1 - Treatment of alkaline bayer process residues - Google Patents
Treatment of alkaline bayer process residues Download PDFInfo
- Publication number
- CA2556439A1 CA2556439A1 CA002556439A CA2556439A CA2556439A1 CA 2556439 A1 CA2556439 A1 CA 2556439A1 CA 002556439 A CA002556439 A CA 002556439A CA 2556439 A CA2556439 A CA 2556439A CA 2556439 A1 CA2556439 A1 CA 2556439A1
- Authority
- CA
- Canada
- Prior art keywords
- flue gas
- solution
- contacting
- bicarbonate solution
- bayer process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/066—Treatment of the separated residue
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
A method for the treatment of an alkaline Bayer process residue, the method comprising the steps of: Cooling and dehumidifying a flue gas by contacting the flue gas with a cool water stream and retaining the heat therefrom;
Contacting a carbonate solution with the cooled, dehumidified flue gas to form a bicarbonate solution; Heating the bicarbonate solution utilising the heat recovered from the cooled flue gas; Contacting the alkaline Bayer process residue with the heated bicarbonate solution; Recovering a carbonate solution;
and Recycling the recovered carbonate solution by contacting the recovered carbonate solution with a cooled, dehumidified flue gas to form a bicarbonate solution.
Contacting a carbonate solution with the cooled, dehumidified flue gas to form a bicarbonate solution; Heating the bicarbonate solution utilising the heat recovered from the cooled flue gas; Contacting the alkaline Bayer process residue with the heated bicarbonate solution; Recovering a carbonate solution;
and Recycling the recovered carbonate solution by contacting the recovered carbonate solution with a cooled, dehumidified flue gas to form a bicarbonate solution.
Claims (27)
1. A method for the treatment of an alkaline Bayer process residue, characterised by the step of:
Contacting the alkaline Bayer process residue with a bicarbonate solution.
Contacting the alkaline Bayer process residue with a bicarbonate solution.
2. A method according to claim 1 characterised in that the bicarbonate solution is at an elevated temperature.
3. A method according to claim 1 or claim 2 characterised in that the bicarbonate solution is formed by the step of:
Contacting a solution with carbon dioxide.
Contacting a solution with carbon dioxide.
4. A method according to claim 3 characterised in that the solution contacted with carbon dioxide is a carbonate solution.
5. A method according to claim 3 characterised in that the solution contacted with carbon dioxide is a sodium carbonate solution.
6. A method according to any one of claims 3 to 5 characterised in that the bicarbonate solution is formed by the step of:
Contacting the solution with a gaseous stream containing carbon dioxide.
Contacting the solution with a gaseous stream containing carbon dioxide.
7. A method according to claim 6 characterised in that the gaseous stream is provided in the form of flue gas.
8. A method according to claim 6 or 7 characterised in that the gaseous stream comprises calciner flue gas, boiler flue gas or kiln flue gas, or a mixture of two or more of such.
9. A method according to claim 7 or 8 characterised in that the flue gas is treated to increase carbon dioxide concentration prior to contact with the solution.
10. A method according to any one of claims 7 to 9 characterised in that, prior to the step of contacting the solution with the flue gas, the method comprises the step of:
Cooling the flue gas.
Cooling the flue gas.
11. A method according to any one of claims 7 to 10 characterised in that, prior to the step of contacting the solution with the flue gas, the method comprises the step of:
Cooling the flue gas and retaining the heat therefrom.
Cooling the flue gas and retaining the heat therefrom.
12. A method according to any one of claims 7 to 11 characterised in that, prior to the step of contacting the solution with the flue gas, the method comprises the step of:
Dehumidifying the flue gas.
Dehumidifying the flue gas.
13. A method according to claim 12 when dependent on claim 10 characterised in that the steps of cooling the flue gas and dehumidifying the flue gas are concurrently achieved by the step of:
Contacting the flue gas with a cool water stream.
Contacting the flue gas with a cool water stream.
14. A method according to claim 2, comprising the step of cooling the flue gas and retaining the heat therefrom, the method characterised by the step of:
Utilising the heat retained from the step of cooling the flue gas to produce the bicarbonate solution at elevated temperature.
Utilising the heat retained from the step of cooling the flue gas to produce the bicarbonate solution at elevated temperature.
15. A method according to claim 14 characterised in that the flue gas is contacted with the solution at a temperature amenable to the efficient formation of the bicarbonate solution, whilst the bicarbonate solution is contacted with the alkaline Bayer process residue at a temperature amendable to the efficient neutralisation of solid alkalinity in the form of tri-calcium aluminate.
16. A method according to any one of claims 1 to 15 characterised in that the pH
of the bicarbonate solution is between about 7.5 and 9Ø
of the bicarbonate solution is between about 7.5 and 9Ø
17. A method according to claim 16 characterised in that the pH of the bicarbonate solution is between 7.5 and 8Ø
18. A method according to any one of claims 1 to 17 characterised in that the total alkali concentration of the bicarbonate solution is substantially identical to the total alkali concentration of the alkaline Bayer process residue.
19. A method according to any one of claims 1 to 18 characterised in that the method comprises the step of:
Thickening the alkaline Bayer process residue.
Thickening the alkaline Bayer process residue.
20. A method according to any one of claims 1 to 19 characterised in that, after the step of contacting the solution with a gaseous stream containing carbon dioxide, the method comprises the step of:
Recovering a carbonate solution.
Recovering a carbonate solution.
21. A method according to claim 20 characterised in that the step of contacting the alkaline Bayer process residue with a bicarbonate solution in a reaction vessel having an overflow and an underflow, and the step of recovering a carbonate solution comprises the step of:
Recovering the carbonate solution as an overflow from the reaction vessel.
Recovering the carbonate solution as an overflow from the reaction vessel.
22. A method according to claim 21 characterised in that the reaction vessel is a gravity separation vessel.
23. A method according to any one any one of claims 20 to 22, when dependent on claim 3 characterise in that the carbonate solution contacted with carbon dioxide is provided in the form of the recovered carbonate solution.
24. A method for the treatment of an alkaline Bayer process residue, the method comprising the steps of:
Contacting a carbonate solution with a gaseous stream containing carbon dioxide to form a bicarbonate solution;
Contacting the alkaline Bayer process residue with the bicarbonate solution;
Recovering a carbonate solution; and Recycling the recovered carbonate solution by contacting the recovered carbonate solution with a gaseous stream containing carbon dioxide to form a bicarbonate solution.
Contacting a carbonate solution with a gaseous stream containing carbon dioxide to form a bicarbonate solution;
Contacting the alkaline Bayer process residue with the bicarbonate solution;
Recovering a carbonate solution; and Recycling the recovered carbonate solution by contacting the recovered carbonate solution with a gaseous stream containing carbon dioxide to form a bicarbonate solution.
25. A method for the treatment of an alkaline Bayer process residue, the method comprising the steps of:
Cooling and dehumidifying a flue gas by contacting the flue gas with a cool water stream and retaining the heat therefrom;
Contacting a carbonate solution with the cooled, dehumidified flue gas to form a bicarbonate solution;
Heating the bicarbonate solution utilising the heat recovered from the cooled flue gas;
Contacting the alkaline Bayer process residue with the heated bicarbonate solution;
Recovering a carbonate solution; and Recycling the recovered carbonate solution by contacting the recovered carbonate solution with a cooled, dehumidified flue gas to form a bicarbonate solution.
Cooling and dehumidifying a flue gas by contacting the flue gas with a cool water stream and retaining the heat therefrom;
Contacting a carbonate solution with the cooled, dehumidified flue gas to form a bicarbonate solution;
Heating the bicarbonate solution utilising the heat recovered from the cooled flue gas;
Contacting the alkaline Bayer process residue with the heated bicarbonate solution;
Recovering a carbonate solution; and Recycling the recovered carbonate solution by contacting the recovered carbonate solution with a cooled, dehumidified flue gas to form a bicarbonate solution.
26. A method according to claim 24 or 25 characterised in that the steps of the method are performed simultaneously in a continuous process.
27. A method for the treatment of an alkaline Bayer process residue substantially as described herein with reference to Figure 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2004900721 | 2004-02-16 | ||
| AU2004900721A AU2004900721A0 (en) | 2004-02-16 | Treatment of Alkaline Bayer Process Residues | |
| PCT/AU2005/000182 WO2005077830A1 (en) | 2004-02-16 | 2005-02-11 | Treatment of alkaline bayer process residues |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2556439A1 true CA2556439A1 (en) | 2005-08-25 |
| CA2556439C CA2556439C (en) | 2011-12-13 |
Family
ID=34842351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2556439A Expired - Fee Related CA2556439C (en) | 2004-02-16 | 2005-02-11 | Treatment of alkaline bayer process residues |
Country Status (3)
| Country | Link |
|---|---|
| BR (1) | BRPI0506808A (en) |
| CA (1) | CA2556439C (en) |
| WO (1) | WO2005077830A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101563137B (en) * | 2006-09-22 | 2014-03-26 | 阿尔科澳大利亚有限公司 | Method of concentrating a bayer process liquor |
| WO2009114910A1 (en) * | 2008-03-18 | 2009-09-24 | Alcoa Of Australia Limited | Method of concentrating a bayer process liquor |
| CN105399118B (en) * | 2015-11-27 | 2017-04-12 | 中国铝业股份有限公司 | Production method for alumina through sintering method |
| US11535790B2 (en) | 2020-09-04 | 2022-12-27 | Saudi Arabian Oil Company | Multivalent iron bio-inhibitor from waste bauxite residue to control reservoir souring |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2994582A (en) * | 1956-07-16 | 1961-08-01 | Kaiser Aluminium Chem Corp | Production of cryolite |
| JPS54107900A (en) * | 1978-02-13 | 1979-08-24 | Mizusawa Industrial Chem | Method oftreating bauxite or similar raw material |
| US4468375A (en) * | 1982-09-27 | 1984-08-28 | Aluminum Company Of America | Production of alumina from aluminum-containing mineral ores with sodium bicarbonate |
| IE930076A1 (en) * | 1992-02-06 | 1993-08-11 | Alcoa Australia | Process for the treatment of red mud |
| JPH06107414A (en) * | 1992-09-24 | 1994-04-19 | Earth Chem Corp Ltd | Production of high purity alumina |
| DE10119685A1 (en) * | 2001-04-20 | 2002-10-24 | Stockhausen Chem Fab Gmbh | Removing water-insolubles from aqueous metal solution, e.g. in production of aluminum oxide by the Bayer process, involves adding water-soluble cationic polyelectrolyte based on dimethylaminopropyl-acrylamide |
-
2005
- 2005-02-11 BR BRPI0506808-8A patent/BRPI0506808A/en not_active Application Discontinuation
- 2005-02-11 CA CA2556439A patent/CA2556439C/en not_active Expired - Fee Related
- 2005-02-11 WO PCT/AU2005/000182 patent/WO2005077830A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005077830A1 (en) | 2005-08-25 |
| BRPI0506808A (en) | 2007-05-29 |
| CA2556439C (en) | 2011-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20210211 |