Building Materials Manufacturing worked example

Kiln Throughput at 99% kiln operating efficiency after stops and slowdowns: a worked example

Push kiln operating efficiency after stops and slowdowns up to 99% and the picture changes. This example computes every intermediate figure at that operating point. a kiln team needs to know the actual tons per hour available from a firing or clinker production window

The inputs for this scenario

  • Good fired material discharged from the kiln: 3,200 tons (unchanged)
  • Kiln producing runtime: 24 hr (unchanged)
  • Kiln operating efficiency after stops and slowdowns: 99 % (raised for this scenario; the documented default is 88)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where kiln operating efficiency after stops and slowdowns 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 divides good fired output by producing runtime to get a raw rate, then multiplies by operating efficiency to give the effective tons per hour. 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

  • Kiln Throughput: 132 tons / hr (headline result)
  • Raw kiln throughput: 133 tons / hr
  • Kiln operating efficiency after stops and slowdowns: 99 %
  • Kiln producing runtime: 24 hr

Run it with your numbers

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

Last reviewed 2026-05-12.