FIELD: chemistry.
SUBSTANCE: invention relates to chemistry and hydrometallurgy and can be used in production of alumina from nephelines and low-grade bauxites using a sintering technique. Aluminate solutions are carbonised with CO2-containing gases in the presence of an aluminium hydroxide inoculant. Aluminium hydroxide formed during the carbonisation process is separated from the liquid phase and then processed into alumina. Treatment of the aluminate solution with the CO2-containing gas begins before adding the inoculant upon achieving caustic modulus of 1.15-1.55 units in the solution.
EFFECT: high quality of aluminium hydroxide due to low content of fine fractions (45 mcm).
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DECOMPOSING ALUMINATE SOLUTIONS | 2015 |
|
RU2612288C1 |
| METHOD OF PRODUCING ALUMINIUM HYDROXIDE | 2016 |
|
RU2638847C1 |
| METHOD OF PROCESSING ALUMINATE SOLUTIONS | 2000 |
|
RU2200706C2 |
| METHOD FOR DECOMPOSION OF ALUMINATE SOLUTIONS BY CARBONIZATION | 2005 |
|
RU2305101C2 |
| METHOD OF DECOMPOSING ALUMINATE SOLUTIONS WHEN PROCESSING NEPHELINE RAW MATERIAL | 2014 |
|
RU2599295C2 |
| METHOD OF PROCESSING ALUMINATE SOLUTION IN PRODUCTION OF ALUMINA FROM NEPHELINE | 2000 |
|
RU2184703C2 |
| HYDROCHEMICAL METHOD OF PROCESSING ALUMINOSILICATE MATERIAL | 2014 |
|
RU2585648C2 |
| METHOD OF PREPARING ALUMINA AND GALLIUM FROM BAUXITE | 1999 |
|
RU2174955C2 |
| METHOD OF RECEIVING OF SANDY ARGIL AT REPROCESSING OF ARGIL-BEARING RAW MATERIAL BY METHOD OF SINTERING | 2005 |
|
RU2381992C2 |
| METHOD OF RECOVERING GALLIUM FROM SOLID GALLIUM-CONTAINING MATERIALS | 2003 |
|
RU2237740C1 |
