Nobuo Nakamura and Yutaka Sato
Regarding pelletizing, we have recently heard reports on various theories about the mechanism of forming wet balls in a balling drum. Most of those theories described simple mechanical mechanism. One of the authors also investigated on this matter a few years ago, and contributed a new theory of ``The Arrangement Effect.'' According to a author's calculation, the so-called capillary force, was not so effective in giving strength to the wet ball as long as it was constructed by the grog of particles about 10-4 cm in radius, but, if it were bound with some colloidal matters, the capillary force should be about 50 kg per square cm between any two particles in a pellet. Further-more, a new theory from the physico-chemical point of view should be introduced in this field. It will be given in detail in our next paper (II).
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