FLSmidth

- Hydrocyclone

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Innovative hydrocyclone design; KREBS gMAX Cyclones incorporate improved geometry enhancing our inlet head, cylinder section, cones and apex. The result? Finer, sharper particle separations and significantly advanced performance for your operation.

Enhance your fine-particle separation with patented hydrocyclone technology

Optimum cyclone performance relies on minimising turbulence, while maximising tangential (outer edge) velocity. The gMAX Cyclone focuses on both of these important factors, and the result is a cyclone that provides significantly advanced performance. In fact, the performance level reached by the gMAX was once only achievable using many small-diameter cyclones, at a much higher capital cost.

The outer wall involute design entrance pre-classifies the feed solids prior to entering the main body of the cyclone. The inlet head of the gMAX also includes an improved vortex finder and top cover plate liner design.

These improvements result in reduced misplacement of material to the overflow and dramatically increased wear life. By using premium ceramics in the lower section of the cyclone, we’ve boosted overall wear life, greatly increasing the intervals between complete cyclone rebuilds.

Through the use of computational fluid dynamics (CFD) analysis, our gMAX Cyclone design features more sharply angled upper cones, followed by longer, angled lower cones. This combination maximises tangential velocity in the upper part of the cyclone. It also provides a long residence time in the critical separation zones of the cyclone’s lower section.

Our design engineers create custom manifolds for your specific applications. Our manifold designs permit convenient removal of any cyclone without disturbing the other cyclones or disassembling the manifold system. All gMAX Cyclone manifolds are uniquely designed to meet our customer's process requirements. Various materials of construction are used to ensure compatibility with the slurry.

Learn more about KREBS® Hydrocyclones (cyclones)

Finer, sharper separations at high capacities
A combination of more sharply angled upper cones, followed by longer, angled lower cones maximises tangential velocity in the upper part of the cyclone while it provides a long residence time in the lower section. The result is a substantially finer separation, with fewer fines in the underflow and less coarse material bypass to overflow.

Fewer cyclones required for optimal performance
The gMAX Cyclone inlet and cylindrical sections have been modified to minimise turbulence and wear, but still have the ability to operate at much higher capacity. The result is cyclone performance that was formerly only achievable using many small diameter cyclones, at a much higher capital cost.

Extended liner wear life
The advanced design of the gMAX Hydrocyclone not only reduces turbulence at the inlet, but reduces misplacement of material to the overflow – reducing wear. Premium ceramics in the lower section of the cyclone also boost overall wear life, increasing the intervals between complete cyclone rebuilds.

Retrofit into existing installations
The gMAX is easily retrofittable into existing installations, to boost your throughput and/or produce finer separations for your operation.

Inlet Head Design

The innovative gMAX inlet has replaced the former Krebs involute feed inlet design – improving upon what had long been considered the preeminent, state-of-the-art design for more than 30 years. The outer wall involute design entrance pre-classifies the feed solids prior to entering the main body of the cyclone. The inlet head of the gMAX also includes an improved vortex finder and top cover plate liner design.

These improvements result in reduced misplacement of material to the overflow and dramatically increased wear life. By using premium ceramics in the lower section of the cyclone, we’ve boosted overall wear life, greatly increasing the intervals between complete cyclone rebuilds.

Cone Design

Through the use of computational fluid dynamics (CFD) analysis, our gMAX cyclone design features more sharply angled upper cones, followed by longer, angled lower cones.

This combination maximises tangential velocity in the upper part of the cyclone. It also provides a long residence time in the critical separation zones of the cyclone’s lower section. The result is a substantially finer separation, with fewer fines in the underflow and less coarse material bypass to overflow.

Wear tests validate CFD Predictions

To validate our CFD predictions for reduced turbulence and wear characteristics on the gMAX inlet head design, we applied layers of paint in different colours to both the gMAX inlet head liner and a competitor’s outer-wall tangential inlet head liner. We assembled the components onto cyclones in our cyclone laboratory, and pumped and slurry through them. The resulting wear patterns showed a dramatic reduction in wear on the gMAX inlet head liner as a result of its improved geometry.

  • BPC rubber
  • Neoprene
  • Nitrile
  • Chlorobutyl
  • Alumina
  • Nitride-bonded-silicon carbide ceramic
  • Reaction-bonded-silicon carbide ceramic
  • Sintered alpha silicon carbide ceramic

  • 304L/316L SS
  • Duplex 2205
  • CD4MCU
  • Monel
  • Inconel
  • Nickel
  • Hastelloy
  • Other metal alloys
  • Polyurethane

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