Proven evaporation and crystallization technologies for alumina refineries
For more than 100 years, GEA has supported alumina producers with process technologies that increase concentration, remove impurities, reduce volume and improve energy performance. Building on the legacy of Kestner and Messo, GEA combines evaporation, crystallization and precipitation expertise with deep process know-how for reliable alumina refinery operation.
Why choose GEA for alumina refining?
GEA has supplied more than 130 evaporation lines to the alumina market, with a total evaporation capacity of about 14,500 t/h. Our technologies support critical Bayer process steps, including spent liquor concentration, impurity removal, salting out evaporation, precipitation support and energy optimization.
Key benefits for alumina production
- Solutions for concentration, precipitation, corrosive applications and energy reduction, based on GEA proprietary process know-how.
- Process expertise supported by laboratory testing, semi-industrial pilots and industrial reference experience.
- High energy savings through GEA meVap® crystallization with mechanical vapor recompression (MVR) or KX technology.
- Energy optimization by integrating spent liquor evaporation (SLE) and salting out evaporation (SOE) technologies.
- Support for salting out technologies, including carbonate, oxalate and sulfate removal, as well as organic liquor burning where applicable.
Want to know more? Get in touch with our experts today
Alumina refinery applications supported by GEA
We know what drives efficient alumina refining
GEA technologies support key alumina process steps and refinery performance targets:
Spent Liquor Concentration
GEA provides robust evaporation technologies for concentrating Bayer liquor, including falling film, multiflash, forced circulation and superconcentration systems, with MVR-assisted options for improved energy efficiency.
Liquor Purification
GEA supports liquor purification with proven technologies for removing oxalates, carbonates, sulfates and organic components, helping improve precipitation efficiency, reduce scaling and increase plant availability.
Energy Optimization
GEA helps alumina refineries reduce energy consumption through smart process integration, vapor reuse, MVR retrofits, evaporation train optimization and energy audits for existing plants.
GEA solutions for alumina refineries
GEA’s alumina expertise dates back to 1905 and incorporates the legacy of renowned technology names such as Kestner and Messo. This know-how is built on decades of industrial plant experience and extensive testing in GEA development centers. Laboratory investigations, process simulations and pilot plant testing support reliable scale-up to industrial production.
GEA solutions include:
GEA KX
GEA KX technology supports efficient process liquor concentration, solvent recovery and waste stream reduction in demanding industrial applications.
Ready to improve alumina refinery performance?
GEA brings thermal separation and process engineering together in one integrated technology portfolio. This helps reduce interfaces, lower project risk and optimize performance across alumina manufacturing.
Whether you are building a greenfield alumina refinery, expanding production, improving liquor purification or reducing energy consumption, GEA provides the process expertise, technologies and lifecycle support needed to maximize refinery performance.
Talk to GEA about safer, more efficient and more sustainable alumina refining.
Want to learn even more?
Webinar: Unlock the potential of meVap® evaporation for alumina refineries
- Learn the fundamentals of MVR and its thermodynamics
- Explore performance considerations
- Discover implementation options
- Consider project economics
Products & technologies
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Evaporation Plants
Advanced systems integrating all components of a thermal separation process plant, utilizing various types of evaporators and heat treatment to optimize energy efficiency and economic viability in industrial processes. GEA specializes in crafting bespoke evaporation solutions that precisely match each client's requirements, prioritizing cost-effe...
Solution Crystallization Plants
Well-suited for most applications and large capacities. Different crystallizer types and arrangements for the desired particle size.
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