High-performance solutions for more efficient alumina refining
Producing alumina efficiently requires precise chemical control throughout the Bayer process. Every stage matters: minimizing sodium losses, optimizing caustic balance, improving filtration, and managing impurities. We support you with high-quality lime-based solutions designed to improve operational efficiency and deliver more consistent alumina production.
Digestion
Adding slaked lime (Ca(OH)2) shifts silica precipitation toward hydrogarnet formation, helping you:
- Reduce costly sodium losses
- Improve digestion efficiency
- Enhance upstream process stability
Causticization
As digestion liquor reacts with CO2 and organics, NaOH converts to Na2CO3, reducing alumina dissolution efficiency.
Lime restores process performance by converting Na2CO3 back into NaOH, enabling you to:
- Maintain strong caustic balance
- Optimize alumina extraction conditions
- Boost overall refinery efficiency
Filtration (Filter Aid)
Before precipitation, fine iron and silica particles must be removed to achieve stable, highpurity production.
Milk of lime generates tricalcium aluminate filter aid, which helps you:
- Improve fineparticle filtration
- Enhance precipitation performance
- Reduce operational variability
Oxalate removal
Organic components in bauxite break down into oxalates, which can accumulate and disrupt refinery stability.
Slaked lime precipitates oxalate as calcium oxalate, helping you:
- Control organic contamination
- Protect precipitation performance
- Maintain longterm circuit stability
Improve your alumina operations
