Powder bridging is a general term to describe material arching, bridging, clinging, and rathole inside the storage tank—“it just won’t come down!”
The causes are complex, varying by particle and environmental conditions. When material stops flowing, it directly impacts product quality and efficiency. Flowability is the first KPI in particulate production. A silo with “hammer rash” is a clear sign operators are struggling with flow.
A wiper moves circularly inside the funnel. Its kinetic energy disrupts the static equilibrium of the powder. Gravity overcomes particle adhesion, causing the powder to fall freely.