Fluidization and discharge of cohesive powders.

The interparticle forces in cohesive powders can influence their flow properties negatively. This may cause great problems in processes involving cohesive powders. In this study the influence of the cohesiveness of a powder on fluidization and the discharge from silos is determined. Fluidization of cohesive powders is very difficult due to the formation of channels in the bed, as soon as the air flow rate is raised above the point of minimum fluidization. These channels provide preferential paths for the upward flowing air, thereby greatly reducing the fluid-like behaviour, that is characteristic for a well fluidized bed. The formation of channels can be suppressed by applying vibration to the bed. ...

Zie: Summary.

Summary

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