With a comprehensive range of filtration technologies and equipment, BOKELA is the leading supplier of filtration solutions for alumina refineries. Our advanced separation technologies not only impress with their superior performance in terms of throughput, moisture content and wash results, they also help our customers to meet high standards of occupational safety. That's why leading alumina producers rely on BOKELA.

Fine Seed and Coarse Seed
Our BoVac Disc filters are the preferred technology for the filtration of aluminum hydrate fine seed and coarse seed on numerous alumina refineries worldwide. They are also used for dewatering of aluminum hydrate product.

Aluminiumhydrate Product 
In the filtration and washing of aluminum hydrate product, our BoVac Pan filters provide intensively washed, soda-free and dry filter cakes. They require a greatly reduced amount of wash condensate.

Bauxite Residue
Sustainable treatment of bauxite residues, their safe landfilling or even recycling are of great relevance to alumina producers. BOKELA BoHiBar Disc Filters have been used successfully for many years for the filtration of red mud and are a breakthrough technology for obtaining dry bauxite residues. They allow a dry landfill or even the industrial recycling of red mud.

Bauxite after Pipeline Transport
Also, for the filtration of bauxite slurries after pipeline transport BoHiBar Disc filters are the right solution.


  • bauxite residue
  • aluminium hydrate
    • fine seed
    • coarse seed
    • product

Main benefits:

  • high throughput
  • low costs with regard to CAPEX and OPEX
  • minimal maintenance
  • highest availability
  • small footprint
  • dry bauxite residues

BoVac Disc filter

For the Filtration of High Suspension Amounts.

BoVac Disc filters are used for the filtration and dewatering of high amounts of suspensions. The enormous filter surface allows high specific throughputs. Due to the modular construction, the filters can be adjusted to various process conditions.

BoHiBar Disc filter

For Particularly Dry Solids.

Continuous pressure filtration for real challenges – such as the filtration of very fine-grained products, high suspension amounts or very low residual moisture. If faced with demanding and challenging filtration tasks and not a lot of space at hand, BoHiBar Disc filters are the right choice.

Continuous Pressure Filtration

For particularly fine particles, high throughputs and very low residual moisture.

Continuous pressure filtration with a BoHiBar Disc filter is the right solution for products difficult to filter and high suspension amounts, as for example in ore, coal or mineral processing. The BoHiBar Drum filter provides excellent results with regard to filtering and washing fine-grained products and demanding process conditions.

Dewatering and Washing of Al-Hydrate (Product)

The BoVac Pan filter is applied for filtering, washing and dewatering of Al-hydrate before the product is given to the calcination process.

Filtration of Al-Hydrate (Fine Seed)

The two BoVac Disc filters L176 are operated in an Australian Alumina refinery for filtration of Al-hydrate fine seed before being recycled to the precipitation tanks.

Vacuum Filtration. State-of-the-Art Design for High Performance.

BoVac Disc, BoVac Drum and BoVac Pan – those are continuously working disc, drum and pan filters for vacuum filtration. They are used especially with regard to continuous production processes with high throughputs.

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