Refractories, Furnace Linings & Foundry Consumables worked example

Service Life ROI with premium lining upgrade investment of 62,500 $: a worked example

What does the result look like when premium lining upgrade investment reaches 62,500 $? The full calculation is worked below with real intermediate numbers. Use it when service life roi in refractories, furnace linings and foundry consumables is being compared against another refractories, furnace linings and foundry consumables project for the same budget.

The inputs for this scenario

  • Premium lining upgrade investment: 62,500 $ (raised for this scenario; the documented default is 25,000)
  • Annual savings from longer campaign life: 18,000 $ / yr (unchanged)
  • Annual support and monitoring cost: 2,500 $ / yr (unchanged)

Working through the calculation

  • Applying the documented formula (Net annual savings = annual savings - annual support) to the inputs above produces each figure below.
  • At this operating point the engine returns 4.03 yr for payback period, the number this scenario is built around.
  • At this operating point the engine returns 15,500 $ / yr for net annual savings.
  • At this operating point the engine returns 62,500 $ for investment.
  • At this operating point the engine returns 15,000 $ for five year net.

How this compares with the baseline

  • Against the tool's baseline example, where premium lining upgrade investment sits at 25,000 $ and the headline result is 1.61 yr, this scenario comes in 150% above the baseline at 4.03 yr.
  • A figure at this level is achievable when premium lining upgrade investment is genuinely sustained, not just peaked for a shift. Simple payback ignores the time value of money and assumes savings repeat every year; a lining that overperforms in year one but degrades faster later will beat this estimate early and miss it later.

Results at a glance

  • Payback period: 4.03 yr (headline result)
  • Net annual savings: 15,500 $ / yr
  • Investment: 62,500 $
  • Five year net: 15,000 $

Run it with your numbers

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

Last reviewed 2026-05-12.