RRA Red Mud Flocculants

In Bayer process production of alumina, bauxite ore is digested in a high temperature, highly caustic solution. Remaining red mud residue, which does not digest, is left suspended in the resulting saturated sodium aluminate solution. This red mud residue must be removed prior to further processing of the saturated solution to ultimately precipitate a purified alumina trihydrate product. Red mud removal requires the use of flocculants effective in bridging and entrapping fine red mud solids to rapidly separate the solids from the saturated liquor. This separation process occurs via decantation and subsequently in multiple counter current washing stages to reclaim soluble alumina and soda.

• Increased alumina production
• Increased mud compaction and alumina recovery
• Improved security filtration capacity & efficiency
• Fewer scale related outages
• Fewer organics introduced

• Improved cost in use
• Lower dose requirement
• Lower soda consumption
• Increased wash efficiency
• Lower energy consumption
• Reduced evaporation requirements
• Fewer scale related outages