Refractories, Furnace Linings & Foundry Consumables worked example

Dryout Time at 12% hold-step allowance for safe moisture release: a worked example

Push hold-step allowance for safe moisture release up to 12% and the picture changes. This example computes every intermediate figure at that operating point. Use it when dryout time in refractories, furnace linings and foundry consumables is being added to next week's schedule and you need an honest hours estimate.

The inputs for this scenario

  • Bound and free water to drive off (equivalent work): 120 units (unchanged)
  • Controlled heat-up drying rate: 12 units / hr (unchanged)
  • Hold-step allowance for safe moisture release: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base dryout time time = required work รท processing rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for adjusted run time, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base run time.
  • At this operating point the engine returns 12 % for allowance applied.
  • At this operating point the engine returns 12 pieces / min for process rate.

How this compares with the baseline

  • Against the tool's baseline example, where hold-step allowance for safe moisture release sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • It computes controlled heat-up hours by dividing the moisture-release workload by the drying rate, then adds an allowance for hold steps and margin. 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

  • Adjusted run time: 11.2 hr (headline result)
  • Base run time: 10 hr
  • Allowance applied: 12 %
  • Process rate: 12 pieces / min

Run it with your numbers

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

Last reviewed 2026-05-12.