FIELD: alumina industry.
SUBSTANCE: invention relates to processing of nepheline ores and obtaining alumina and soda products by sintering. In the process of preparing the nepheline-limestone-soda mixture, sulphate-containing drainage water from the limestone quarry is added to it in amount of 40.0–60.0% of the volume of the liquid phase of the nepheline-limestone-soda mixture.
EFFECT: method increases output of a commercial product—potassium sulphate and prevents its contamination with fluorine-containing toxic compounds, and also prevents discharge of drainage water into an open water body.
1 cl, 3 tbl
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| ALUMINA PRODUCTION PROCESS | 2000 |
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