UA80810C2 - Process for preparation of alumina - Google Patents
Process for preparation of aluminaInfo
- Publication number
- UA80810C2 UA80810C2 UA20040604533A UA20040604533A UA80810C2 UA 80810 C2 UA80810 C2 UA 80810C2 UA 20040604533 A UA20040604533 A UA 20040604533A UA 20040604533 A UA20040604533 A UA 20040604533A UA 80810 C2 UA80810 C2 UA 80810C2
- Authority
- UA
- Ukraine
- Prior art keywords
- lixiviation
- aluminate solution
- bauxite
- obtaining
- solution
- Prior art date
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to the field of non-ferrous metallurgy. A process for preparation of alumina consists in mixing bauxite with the part of spillage alkaline-aluminate solution and lixiviation thereof in two stages, at the first stage lixiviation of obtained suspension at the temperature of 95-110 DEGREE C and concentration of caustic alkali of 200-260 g/l, with dosing bauxite by 20-70 % higher as compared with amount of bauxite, necessary for obtaining equilibrium caustic module in available conditions of lixiviation, separation of sludge from aluminate solution, mixing sludge with bauxite and remaining part of recycle solution, and lixiviation of obtained suspension at the temperature of 150-250 DEGREE C and concentration of caustic alkali of 160-220 g/l at the second stage with dosing recycle solution, providing obtaining caustic module in final aluminate solution of 0.03-0.1 unitshigher its equilibrium level in available conditions of lixiviation, separation of sludge from aluminate solution and washing thereof, dissolution of aluminate solution with obtaining aluminium hydroxide and mother liquor, evaporation of mother liquor with obtaining spillage alkaline-aluminate solution. The invention allows to increase efficiency of Bayer method.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2003117554/15A RU2254295C2 (en) | 2003-06-11 | 2003-06-11 | Method of aluminum oxide production |
Publications (1)
Publication Number | Publication Date |
---|---|
UA80810C2 true UA80810C2 (en) | 2007-11-12 |
Family
ID=35836048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
UA20040604533A UA80810C2 (en) | 2003-06-11 | 2004-06-10 | Process for preparation of alumina |
Country Status (2)
Country | Link |
---|---|
RU (1) | RU2254295C2 (en) |
UA (1) | UA80810C2 (en) |
-
2003
- 2003-06-11 RU RU2003117554/15A patent/RU2254295C2/en not_active IP Right Cessation
-
2004
- 2004-06-10 UA UA20040604533A patent/UA80810C2/en unknown
Also Published As
Publication number | Publication date |
---|---|
RU2254295C2 (en) | 2005-06-20 |
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