Industrial Minerals & Powder Processing worked example

Particle Size Yield at 99% target yield rate: a worked example in industrial minerals & powder processing

This scenario runs the particle size yield calculation on the strong side: 99% target yield rate, with every other input held at its documented default. Use it when a quality manager or process engineer needs to track how much on-spec product the grinding and classification circuit is producing versus oversize rejects and fines losses.

The inputs for this scenario

  • On-spec product tonnage: 72 tons (unchanged)
  • Total production tonnage: 85 tons (unchanged)
  • Target yield rate: 99 % (raised for this scenario; the documented default is 90)

Working through the calculation

  • Applying the documented formula (Particle size yield = on-spec product tonnage / total production tonnage x 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 84.71 % for particle size yield, the number this scenario is built around.
  • At this operating point the engine returns 14.29 pp for gap to target yield.
  • At this operating point the engine returns 72 tons for on-spec product tonnage.
  • At this operating point the engine returns 85 tons for total production tonnage.

How this compares with the baseline

  • Against the tool's baseline example, where target yield rate sits at 90% and the headline result is 84.71 %, this scenario lands almost exactly on the baseline at 84.71 %.
  • Use it on every grind campaign or shift to confirm the classifier cut and mill settings are holding the particle-size distribution within customer limits. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Particle size yield: 84.71 % (headline result)
  • Gap to target yield: 14.29 pp
  • On-spec product tonnage: 72 tons
  • Total production tonnage: 85 tons

Run it with your numbers

  • Every input above is editable in the live Particle Size Yield calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.