Continuous vacuum rotary filters such as disc filters, drum filters and pan filters are the preferred solution when it comes to the filtration of large suspension amounts because of their cost-effectiveness, reliability and their much smaller space demand compared to discontinuous separation technologies.

They are used for cake-forming filtration and perform tasks such as solids separation, washing and demoisturing of the filter cakes. The fields of application are suspensions with solids concentrations in the range of 3–50 wt .-%. The maximum available pressure difference is about 0.8 to 0.9 bar, whereby usual pressure differences in practice are 0.5 to 0.7 bar.

With the BoVac filter series, BOKELA offers continuous rotary filters with state-of-the-art design. They deliver top performance in several disciplines – be it throughput, separation result, reliability, operational safety or economy.

  • The BoVac Disc filter stands for large filter area and enormous throughput quantities while minimizing space demand.
  • The BoVac Drum filter is characterized by excellent cake washing and a unique quick change of filter cloth.
  • The BoVac Pan filter is used for the filtration and washing of coarse-grained solids due to its horizontal filter area.
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.

BoVac Drum filter – Excellent With Regard to Filtration, Washing and Dehumification.

Thanks to their innovative, distinctive profile, BoVac Drum filter are among the most modern and most efficient vacuum drum filters. They are used in various industries. The exchangeable filter cells allow changing the filter cloth during on-going operation.

BoVac Pan filter – With Horizontal Filter Surface For Ideal Filter Cake Washing.

Filters for coarse-grained and quickly sedimenting suspensions with excellent hydraulics. High solids throughputs, intensive cake washing, low residual moisture – the BoVac Pan filter guarantee high performance and reliable operation.

Dewatering of Quartz Sand

The BoVac Pan filter is used in a quartz sand mine in Russia for filtration and dewatering of hydro-cycloned quartz sand which is used for glass production.

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 Potash (Muriate of Potash - MOP)

This BoVac Pan filter was chosen by the client to replace an old pan filter. The aim of the client was to increase the filter performances on the same footprint and to implement state-of-the-art equipment.

Filtration, Washing and Dewatering of Gypsum

The BoVac Drum filter with 1 m² filter area is operated in parallel to a 12 m² belt filter for filtration and washing of gypsum.

Filtration, Washing and Dewatering of an Organic Pharma Intermediate

The BoVac Drum filter is operated for filtration, washing and dewatering of an organic pharma intermediate. The filter is encapsulated and equipped with 3 adjustable wash bars with full cone spray nozzles and with a CIP system.

Filtration, Washing and Dewatering of a Textile Dye Product

The BoVac Drum filter is operated for filtration, washing and dewatering of a textile dye product. The filter is equipped with a wash hood and adjustable wash bars with spray nozzles and with a CIP system for clean & safe operation.

Filtration, Washing and Dewatering of Pigments

Four BoVac Drum drum filters are operated for filtration, washing and dewatering of fine sized tarnishing pigments. Each of these modern 5 m² vacuum drum filters replaces one 8 m² drum filter of old design.

Filtration of Zinc Tailings

Two BoVac Disc filters M176 are operated for dewatering of zinc tailings from a copper and zinc mine in Australia, Qld. Start of operation was in 2014.

Filtration of Copper/Gold Tailings for Mine Backfill

Two BoVac Disc filters L176 are operated in a Gold/Copper Mine in Bulgaria for the filtration of flotation tailings which are used for mine backfill. The dewatered and discharged filter cake is mixed with cement and pumped back to the underground to fill the galleries.

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.

Filtration of Flotation Coal Concentrate

The two BoVac Disc filters L176 with a filtration area of each 176 m² are used in a coal preparation plant in Australia for the filtration of flotation coal concentrate.

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