Mixing, Blending & Industrial Batch Processing worked example

Powder Wet-Out Time at 14% dispersion allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop dispersion allowance to 14%, then walk the calculation through step by step. Estimate powder wet-out time from powder charge mass, mixer wet-out rate, and a process allowance for de-lump and hold time.

The inputs for this scenario

  • Powder charge: 80 kg (held at the documented default)
  • Mixer wet-out rate: 240 kg / hr (held at the documented default)
  • Dispersion allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base wet-out time = powder charge รท mixer wet-out rate.
  • Adjusted run time works out to 0.38 hr at these inputs, and this is the headline figure for the scenario.
  • Base run time works out to 0.33 hr at these inputs.
  • Allowance applied works out to 14 % at these inputs.
  • Process rate works out to 240 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where dispersion allowance sits at 20% and the headline result is 0.4 hr, this scenario comes in 5% below the baseline at 0.38 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to dispersion allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It models wet-out as a constant rate, so it won't capture powders that wet slowly at first then accelerate, or rate changes from temperature, surfactant, or impeller speed.

Results at a glance

  • Adjusted run time: 0.38 hr (headline result)
  • Base run time: 0.33 hr
  • Allowance applied: 14 %
  • Process rate: 240 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Powder Wet-Out Time calculator, set dispersion allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.