INTEGRATED RED MUD SETTLING AND SEPARATING WASHING METHOD AND SETTLER

摘要

The present invention discloses an integrated red mud settling and separating washing method and a settler, comprising the step of: settling the diluted slurry and separating sodium aluminate solution and the red mud therefrom, obtaining alumina product after the sodium aluminate solution goes through subsequent steps, settling and washing the red mud with hot water to remove soda contained therein, discharging the red mud to a red mud disposal dam after it reaches the emission standard, effecting settling and separating by using a flat bottomed settler, and effecting washing by hot water by using a highly effective settler. The present invention is constructed as comprising a flat bottomed settler and a highly effective settler, wherein a separating settler and a common settler are of flat bottomed settlers, and wherein several highly effective settlers are used as the washing settlers. The present invention sufficiently combines the advantages of the two prior art settlers so that a stable production is ensured, the red mud is discharged directly, thereby greatly reducing the production costs and ensuring an optimal effect in all respects of the whole production system.