Liquids with similar densities

As the density difference becomes smaller, separating two liquids can become more difficult. Conditions must be selected for the actual mixture.

An earlier application involved a heavy-liquid specific gravity of 1.00 and a light-liquid specific gravity of 0.97–0.98. This is an individual example, not a guarantee for every mixture with those values.

Very fine particles

Smaller particles settle less readily. Classification by particle size can also become difficult. Feed rate and other conditions must be considered together with centrifugal force.

In a previous classification application, a particle-size criterion was used to distinguish a solids fraction from a slurry fraction. Slurry means solid particles dispersed in a liquid.

Read about particle classification →

High-viscosity slurry

High viscosity makes particle movement more difficult and can reduce separation efficiency. Removing impurities from a viscous liquid therefore requires a review of operating conditions.

Conditions considered in earlier applications included reducing feed rate or increasing centrifugal force. Heating was used where the material could tolerate a viscosity reduction without an unacceptable quality effect.

Consider the material, not only the centrifugal force

A higher force alone does not solve every difficult separation. Review density difference, particle size and viscosity together with throughput and the target result. We use experience and sample testing to assess an appropriate method.

If you think your material may be difficult to separate