Refractories, Furnace Linings & Foundry Consumables worked example

Cure Time at 12% schedule allowance for ramp and hold margin: a worked example

What does the result look like when schedule allowance for ramp and hold margin reaches 12%? The full calculation is worked below with real intermediate numbers. Use it when cure 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

  • Total lining thickness to cure (equivalent work): 120 units (unchanged)
  • Cure progression rate at holding conditions: 12 units / hr (unchanged)
  • Schedule allowance for ramp and hold margin: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base cure 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 schedule allowance for ramp and hold margin sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • A figure at this level is achievable when schedule allowance for ramp and hold margin is genuinely sustained, not just peaked for a shift. It is a scheduling estimate, not a substitute for the manufacturer's cure schedule; low temperature, low humidity, or high-cement products can extend real cure well beyond a linear rate.

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 Cure Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.