Mixing, Blending & Industrial Batch Processing worked example

Blend Time at 11% process allowance: a worked example

Suppose process allowance falls to 11%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate blend time per batch from batch size, mixer throughput, and a process allowance for charging, sampling, and minor stops.

The inputs for this scenario

  • Batch size: 1,200 kg (held at the documented default)
  • Mixer blend throughput: 600 kg / hr (held at the documented default)
  • Process allowance: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base blend time = batch size รท mixer blend throughput.
  • Adjusted run time works out to 2.22 hr at these inputs, and this is the headline figure for the scenario.
  • Base run time works out to 2 hr at these inputs.
  • Allowance applied works out to 11 % at these inputs.
  • Process rate works out to 600 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where process allowance sits at 15% and the headline result is 2.3 hr, this scenario comes in 3.48% below the baseline at 2.22 hr.
  • It divides batch size by mixer blend throughput for a base time, then inflates it by your process allowance to give an adjusted blend time. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Adjusted run time: 2.22 hr (headline result)
  • Base run time: 2 hr
  • Allowance applied: 11 %
  • Process rate: 600 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Blend Time calculator, set process allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.