Refractories, Furnace Linings & Foundry Consumables worked example

Material Shrinkage at 99% effective yield after shrinkage losses: a worked example in refractories, furnace linings & foundry consumables

What does the result look like when effective yield after shrinkage losses reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when material shrinkage in refractories, furnace linings and foundry consumables is being committed and you need a throughput number you can defend.

The inputs for this scenario

  • Finished castings or lining pieces produced: 1,200 units (unchanged)
  • Production or cure runtime: 8 hr (unchanged)
  • Effective yield after shrinkage losses: 99 % (raised for this scenario; the documented default is 90)

Working through the calculation

  • Applying the documented formula (Raw material shrinkage = completed output รท runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 149 units for effective throughput, the number this scenario is built around.
  • At this operating point the engine returns 150 units for raw throughput.
  • At this operating point the engine returns 99 % for efficiency.
  • At this operating point the engine returns 8 hr for runtime.

How this compares with the baseline

  • Against the tool's baseline example, where effective yield after shrinkage losses sits at 90% and the headline result is 135 units, this scenario comes in 10% above the baseline at 149 units.
  • A figure at this level is achievable when effective yield after shrinkage losses is genuinely sustained, not just peaked for a shift. A single yield figure blends solidification shrinkage, drying loss, and reject scrap; it will not tell you which loss dominates or predict shrinkage on a part geometry you have not run before.

Results at a glance

  • Effective throughput: 149 units (headline result)
  • Raw throughput: 150 units
  • Efficiency: 99 %
  • Runtime: 8 hr

Run it with your numbers

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

Last reviewed 2026-05-12.