Rubber, Tires, Foam & Elastomer Manufacturing worked example

Carbon Black Usage with carbon black feed rate of 30 units / hr: a worked example

What does the result look like when carbon black feed rate reaches 30 units / hr? The full calculation is worked below with real intermediate numbers. Use it when carbon black usage in rubber, tires, foam and elastomer manufacturing is being quoted and consumables are a real chunk of the cost stack.

The inputs for this scenario

  • Carbon black feed rate: 30 units / hr (raised for this scenario; the documented default is 12)
  • Mixer runtime this run: 8 hr (unchanged)
  • Carbon black cost per unit: 3.5 $ / unit (unchanged)

Working through the calculation

  • Applying the documented formula (Carbon black usage consumed = carbon black usage use rate × carbon black usage runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 240 units for carbon black usage consumed, the number this scenario is built around.
  • At this operating point the engine returns 840 $ for carbon black usage run cost.
  • At this operating point the engine returns 8 hr for carbon black usage runtime.
  • At this operating point the engine returns 3.5 $ / unit for carbon black usage unit cost.

How this compares with the baseline

  • Against the tool's baseline example, where carbon black feed rate sits at 12 units / hr and the headline result is 96 units, this scenario comes in 150% above the baseline at 240 units.
  • A figure at this level is achievable when carbon black feed rate is genuinely sustained, not just peaked for a shift. It uses a flat feed rate and unit cost; real usage varies with ram pressure, N-grade, pellet moisture and dust-collection losses that this linear model does not capture.

Results at a glance

  • Carbon black usage consumed: 240 units (headline result)
  • Carbon black usage run cost: 840 $
  • Carbon black usage runtime: 8 hr
  • Carbon black usage unit cost: 3.5 $ / unit

Run it with your numbers

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

Last reviewed 2026-05-12.