The agglomeration characteristics of damp powders in a tapping type gyratory agglomerator.

概要

論文の詳細を見る
A new method of evaluating the marked agglomeration tendency of damp powders, which accounts for the liquid requirements and size control of agglomerates, has been invented. The tapping-type gyratory agglomerator used here consists basically of a shaking pan, the central part of which the rubber bottom is tapped with an eccentric circular motion. The quality of the agglomerate forms at various liquid contents Cd is evaluated by an agglomeration index defined as Ig=Cd/[εo/(1-εo)](ρl/ρs), where εo is the void fraction in a close-packed bed of dry powders, and by the vibration intensity G obtained from the tapping action. The excellent growth of equal-sized agglomerates is revealed in both ranges of α≤Ig<β and 0<G≤38.40. The resulting smaller agglomerates are formed near the critical value of Ig=β, by simple coalescence in the nuclei region and further grown in accordance to the different sizes of the agglomerates.
粉体工学会の論文