Tag Archives: impact attrition

Breakage of Powders in Lean-Phase Pneumatic Conveying: The Influence of Material Type

By B.A. Kotzur, R.J. Berry, M.S.A. Bradley, and R.J. Farnish – Lean-phase pneumatic conveying is utilised across a wide range of industrial processes. This conveying method offers a number of advantages such as process hygiene and routing flexibility, however, due to high impact velocities in the pipeline, particle attrition remains a considerable issue. This work looks at how different material types respond to equivalent impact conditions, namely amorphous (Carbolux) and crystalline (cooking salt) morphologies, and translates this to expected behaviour during conveying. A bespoke bench-scale centrifugal attrition tester was used to test an individual particle size fraction of each material across two impact angles and five impact velocities. It was found that the percentage mass retained in the size fraction reduced linearly with velocity for the amorphous material, and polymerically for the crystalline material. Continue reading Breakage of Powders in Lean-Phase Pneumatic Conveying: The Influence of Material Type