Effect of Packing Conditions of a Fine Powder on Powder Pressure in a Bin [Translated]†

Abstract

We examined the effect of packing conditions on the pressure of a fine powder in a bin. Results of experiments on filling fine powders through sieves of different mesh sizes confirmed that the powder pressure and the charge of a fine powder in a bin are influenced by packing conditions. This is because the mechanical properties of a fine powder change considerably in accordance with packing conditions, i.e., normal stress acting on the bed, state of agglomeration, packing structure, filling rate, and the like. The pressure and charge of a fine powder in a bin can be estimated by Janssen's equation using mechanical properties that depend on packing conditions.† This report was originally printed in J. Soc. Powder Technology, Japan. 33(2), 102-107 (1996) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.