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Bokela - Model BoHiBar -Pressure Disc Filter
High solids throughputs. Low residual moisture. Continuous operation. Minimal footprint. These are the strengths of the BoHiBar Disc filter. Particularly dry solids are achieved with BoHiBar steam pressure filtration. So dry that some residues even become recyclables.
Wherever difficult to filter products or large amounts of suspension are to be filtered – such as concentrates from ore, coal and mineral processing or their tailings – BoHiBar Disc filters offer outstanding solutions.
BoHiBar Disc filters represent the most advanced technology for continuous pressure filtration. High filtration pressure differences up to 6 bar (g) and most modern filter and plant design are the reasons why even with very fine-grained, difficult-to-filter products, large specific throughputs and very low residual moisture are achieved. The space requirement is minimal.
For particularly low residual moisture, steam pressure filtration can be performed on these filters, too. This innovative hybrid process produces dry solids which open up new possibilities for product marketing through the re-usage of residues or significant improvements in product handling and transport.
BoHiBar Disc filters are available in various sizes with filter areas up to 168 m2 per filter unit.
BoHiBar Disc filters from BOKELA represent the most advanced technology for continuous pressure filtration.
The basic principle is also known as hyperbaric filtration and very simple: a continuous rotary filter is installed completely in a pressure vessel filled with compressed air of up to 7 bar (a). A pump feeds the slurry into the filter trough in the pressure vessel. The filtrate flows through the filtrate pipes to the control head of the filter and from there to the filtrate separator. The filter cake is removed from the filter cloth by a reverse blast of compressed air and discharged through a solids sluice from the pressure vessel.
- filtration with high differential pressures Δp up to 6 bar (g)
- most modern disc filters with innovations known and proven by BoVac Disc filter technology
- option of installing steam hoods for steam pressure filtration
- closed process area (hermetic) inside the pressure vessel
- manholes allow quick and easy access to the pressure vessel from both sides and allow easy replacement of spare parts via a drawbridge
- reliable double gate valve for solids discharge
- low maintenance requirement due to innovative wear protection components
- Alumina (Bauxite Residue)
- Coal
- Iron Ore
- Base Metals
- Tailings
- filtration of fine-grained products
- filtration of large quantities of suspension
- minimal footprint
- less need for filter cloths as filter area is much smaller compared to discontinuous filter equipment
- fully automatic and continuous operation
- lowest residual moisture, especially with steam pressure filtration
- saving of costs for thermal drying up to the avoidance of thermal drying
- possibility for re-usage of residues
- significant improvements in product handling and transport