Building Materials Manufacturing worked example

Cement Mill Throughput at 99% mill operating efficiency after stops and rate loss: a worked example

Push mill operating efficiency after stops and rate loss up to 99% and the picture changes. This example computes every intermediate figure at that operating point. a cement plant needs to know whether finish grinding output can meet cement demand

The inputs for this scenario

  • Good cement produced by the mill: 3,200 tons (unchanged)
  • Cement mill producing runtime: 24 hr (unchanged)
  • Mill operating efficiency after stops and rate loss: 99 % (raised for this scenario; the documented default is 88)

Working through the calculation

  • Applying the documented formula (Raw cement mill throughput = good cement produced by the mill รท cement mill producing runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 132 tons / hr for cement mill throughput, the number this scenario is built around.
  • At this operating point the engine returns 133 tons / hr for raw cement mill throughput.
  • At this operating point the engine returns 99 % for mill operating efficiency after stops and rate loss.
  • At this operating point the engine returns 24 hr for cement mill producing runtime.

How this compares with the baseline

  • Against the tool's baseline example, where mill operating efficiency after stops and rate loss sits at 88% and the headline result is 117 tons / hr, this scenario comes in 12.5% above the baseline at 132 tons / hr.
  • It computes effective tons per hour of good cement by dividing good output by producing runtime, then derating that raw rate by mill operating efficiency. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Cement Mill Throughput: 132 tons / hr (headline result)
  • Raw cement mill throughput: 133 tons / hr
  • Mill operating efficiency after stops and rate loss: 99 %
  • Cement mill producing runtime: 24 hr

Run it with your numbers

  • Every input above is editable in the live Cement Mill Throughput calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.