Dewatering cyclones

Dewatering cyclones from Multotec are ideal for all dewatering applications in mineral processing, such as in water recovery and slurry densification.

Our range of dewatering cyclones provides higher-capacity processing and reduced vortex finder wear thanks to our unique scrolled evolute inlet head design!

We manufacture a range of dewatering cyclones to suit any classification requirement:

  • Very small diameter polyurethane dewatering cyclones (FC and VV cyclones)
  • Small diameter dewatering cyclones
  • Large diameter dewatering cyclones (HC, HA and VV cyclones)

All dewatering cyclones are manufactured locally at our state-of-the-art facility in Johannesburg, South Africa, where we ensure strict quality control and product customisation.

Features of dewatering cyclones:

  • Designed with scrolled evolute inlet head design
  • Minimised wear in abrasive applications
  • Long life vortex finder cast in abrasion-resistant polyurethane
  • Very fine cut-points for dewatering purposes
  • Suitable for high-pressure applications up to 3.5 bar (VV cyclone range up to 1.7 bar)

Enquire now for more information on our range of dewatering cyclones.

Selecting a dewatering cyclone for your application:

The correct selection of dewatering cyclones for the dewatering process depends on your mineral processing application itself! We custom-design our range of dewatering cyclones to suit your application requirements, including:

  • the underflow slurry density required
  • the required solids yield to the underflow
  • the overflow particle size distribution
  • the required overflow solids concentration
  • the feed particle size distribution

To select the correct dewatering cyclone for the process, it is important that, depending on the particle size distribution of the material being treated and the cyclone cut-point, a certain amount of solid particles could still be present in the cyclone overflow. The amount varies from negligibly small amounts of material to amounts that would classify the cyclone as a classification cyclone.

The most important design aspects of a dewatering cyclone are the cyclone diameter and the spigot diameter. The diameter of the dewatering cyclone will ensure that the correct cut-point is achieved, and the correct spigot diameter will ensure that the design underflow slurry density is achieved.

Very small diameter dewatering cyclones:

Multotec offers very small diameter polyurethane dewatering cyclones (i.e. 25 mm ID to 75 mm ID cyclones from our FC cyclone range) and 100 mm ID and 165 mm ID polyurethane dewatering cyclones from our VV cyclone range.

For large volumetric throughputs, a number of cyclones are necessary, and will be installed within canisters, for the FC cyclone range, or onto cyclone distributorswith discharge tanks for the VV cyclone range.

Small diameter dewatering cyclones:

For slurry dewatering or water recovery (i.e. high solids yield to the underflow), we recommend our range of small diameter dewatering cyclones that achieve a fine cut-point.  A higher-feed pressure can also be accommodated in small diameter dewatering cyclones, which assists in achieving a fine cut-point.

Large diameter dewatering cyclones:

Larger diameter dewatering cyclones may be used in processes where the feed to the cyclone does not contain a high fraction of ultra-fines and / or where solids losses to the overflow are acceptable.

In the latter case, where solids report to the overflow, large diameter dewatering cyclones are acceptable when downstream equipment to recover or dispose of these solids exists – such as thickeners or tailings storage facilities.

Dewatering cyclones applicable to these processes are the high-capacity classification cyclones (HC and HA) and the larger diameter cyclones of the polyurethane cyclones range (VV).

In cases where stockpiles or very high underflow densities are required, see our range of stacker cyclones.

The scrolled evolute inlet design: the heart of the Multotec cyclone range!

Through extensive testing and simulations, Multotec has proven that the scrolled evolute design has a higher capacity when compared to other inlet configurations.

This design substantially reduces vortex finder wear, thereby reducing operating costs while maximising cyclone efficiency by allowing particles to follow its natural spiral trajectory. The scroll section also allow for natural particle segregation to take place before entering the classification zone.

Achieve your mineral processing goals with Multotec. Call us on +27 (0) 11 923 6000 or click here to send us an enquiry here.

Lower your cost per ton with our mineral processing equipment!

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