FIELD: metallurgy.
SUBSTANCE: invention relates to nonferrous metallurgy. Proposed method comprises leaching alumina-bearing stock to obtain aluminate solution to be separated from red mud and directed to crystallisation for production of mother solution and precipitate containing aluminium hydroxide to be fed for calcination to making alumina. Crystallisation is carried out by adding crystalline aluminium nitrate to aluminate solution in amount of 3.6-9.9 wt % of aluminium oxide in aluminate solution.
EFFECT: accelerated and efficient processing.
1 tbl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PROCESSING ALUMINA-CONTAINING MATERIAL | 2010 |
|
RU2447023C1 |
| METHOD OF PROCESSING ALUMINA-BEARING STOCK | 2012 |
|
RU2489354C1 |
| METHOD OF PROCESSING ALUMINA-BEARING STOCK | 2011 |
|
RU2490208C1 |
| METHOD OF PROCESSING ALUMINA-CONTAINING RAW MATERIAL | 2007 |
|
RU2361815C1 |
| METHOD OF DECOMPOSING ALUMINATE SOLUTIONS WHEN PROCESSING NEPHELINE RAW MATERIAL | 2014 |
|
RU2599295C2 |
| METHOD OF DECOMPOSING ALUMINATE SOLUTIONS | 2015 |
|
RU2612288C1 |
| METHOD OF PRODUCING ALUMINIUM HYDROXIDE | 2016 |
|
RU2638847C1 |
| METHOD OF RECEIVING OF SANDY ARGIL AT REPROCESSING OF ARGIL-BEARING RAW MATERIAL BY METHOD OF SINTERING | 2005 |
|
RU2381992C2 |
| METHOD OF PRODUCING METALLURGICAL ALUMINA BY AN ACID-ALKALINE METHOD | 2018 |
|
RU2705071C1 |
| METHOD OF PREPARING ALUMINA AND GALLIUM FROM BAUXITE | 1999 |
|
RU2174955C2 |
