Bulk Solids Characterization

The same screw feeder at the same speed can deliver consistently on one powder and drift by several percent on another. The difference lies in compressibility, wall friction, and cohesion, and in how bulk density shifts as the hopper empties.

Kst quantifies explosion rate-of-pressure-rise under standardized lab conditions. It does not directly describe how an explosion behaves in your vessel, at your turbulence level, or with your ignition scenario. This insight explains what the number means, where the cubic law holds, and when a competent person must go further than the test certificate.

Temperature shifts surface energy, contact compliance, and residual moisture state in ways that can reverse a powder's ambient flow behavior. This Insight explains the dominant mechanisms across three temperature ranges and what elevated-temperature testing reveals for SLS powder beds, spray dryer outlets, and heated conveying systems.

Vibration can improve powder discharge when it breaks a weak arch or [...]

Dust suppression oil can reduce airborne calcium carbonate dust, but it may [...]

Powder residence time matters because the sample and the failure often describe [...]

Powder instability after conveying, filling, or transfer is often treated as [...]

A powder operating window defines the process conditions in which a [...]

Sieve blinding does more than reduce screening capacity. It changes the [...]

Acoustic emission for flow blockage prediction captures high-frequency stress waves generated by [...]

Mass flow requires hopper walls that are steep and smooth enough for [...]

Bulk powder behavior is not controlled by particle size alone. In many [...]