Industrial Minerals & Powder Processing worked example

Dryer Energy Cost with production tonnage to dry of 250 tons: a worked example in industrial minerals & powder processing

Suppose production tonnage to dry falls to 250 tons. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate the thermal energy cost to dry industrial minerals from incoming moisture to target moisture using rotary dryers, flash dryers, or fluid bed dryers.

The inputs for this scenario

  • Production tonnage to dry: 250 tons (the input this scenario stresses; the baseline uses 500)
  • Water removal per ton of feed: 100 lb / ton (held at the documented default)
  • Energy cost per lb of water removed: 0.01 $ / lb (held at the documented default)
  • Fixed dryer operating cost per period: 350 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable drying cost = production tonnage x water removal per ton x energy cost per lb of water removed.
  • Total dryer energy cost works out to 351 $ at these inputs, and this is the headline figure for the scenario.
  • Drying cost per ton works out to 1.41 $ / ton at these inputs.
  • Variable drying cost works out to 1.25 $ at these inputs.
  • Fixed dryer operating cost works out to 350 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where production tonnage to dry sits at 500 tons and the headline result is 353 $, this scenario lands almost exactly on the baseline at 351 $.
  • It multiplies tonnage by water removed per ton and energy cost per pound to get variable drying cost, then adds the fixed operating cost for a period total and a cost per ton. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Total dryer energy cost: 351 $ (headline result)
  • Drying cost per ton: 1.41 $ / ton
  • Variable drying cost: 1.25 $
  • Fixed dryer operating cost: 350 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Dryer Energy Cost calculator, set production tonnage to dry to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.