Process reasoning
Liquid must pass through both the filter medium and the growing solids cake. Fine or deformable particles can pack more tightly, increasing resistance. The effect depends on solids shape, distribution, concentration and liquid properties. A thick cake and a thin cake formed from the same slurry may behave differently. Filter-medium blinding can produce similar symptoms, so inspect the media and compare fresh and repeated-cycle results before assigning the cause.
ILLUSTRATIVE EXAMPLE
Apply the reasoning
In an illustrative trial, a higher-force condition initially removes liquid quickly but then drains slowly through a dense cake. A lower-force filling stage followed by an agreed spin sequence may produce a better total cycle. This is a question for controlled testing within the manufacturer’s limits, not an operating instruction for an installed machine. Compare final moisture, clarity and wash performance as well as elapsed time.
What to record
| Item | Basis to document |
|---|---|
| Cake loading | Dry solids per area and estimated thickness |
| Filtration response | Liquid collection versus elapsed time |
| Product quality | Moisture basis, impurity level and crystal integrity |
| Cycle stability | Changes after repeated runs on the same medium |
Review checklist
- Characterize fines and the liquid viscosity.
- Distinguish cake resistance from blocked or damaged filter media.
- Record the full operating sequence approved for the trial.
- Evaluate cake discharge and residual heel after separation.
Your next decision
Request a filtration curve and repeat-cycle observations for shortlisted basket centrifuges. A machine with higher published acceleration may be valuable for one product and offer little benefit for another. Choose the design and control flexibility that produce a stable process window, and specify the feed limits within which that result was demonstrated.