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Article . 1989 . Peer-reviewed
License: Elsevier TDM
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A consideration of ultrafine grinding based on experimental result of single particle crushing

Authors: Torajiro Honma; Yoshiteru Kanda; S. Yashima; T. Hosoya; Yasushi Abe;

A consideration of ultrafine grinding based on experimental result of single particle crushing

Abstract

Abstract In general, it is well known that the energy efficiency of a grinding process decreases with decrease in produced particle size, increase in grinding time, or increase in input energy. In this paper, a grinding method, based on fracture mechanics, to produce ultrafine particles has been investigated. We define the size reduction energy as the elastic strain energy which is stored in the specimen up to the instant of fracture. Assuming that the kinetic energy of a grinding medium or a particle were converted completely into fracture energy, the relationship between impact velocity required to fracture and particle size, or between impact velocity of a grinding medium required for a particle to fracture and mass of a medium have been calculated. As a result, the assumption that, for ultrafine grinding, a grinding medium collides against a particle was found to be more feasible than that a particle collides against a medium. It was necessary to increase the collision probability because the number of particles produced varies inversely as the cube of particle size. The experimental verification of the above considerations was performed using a ball mill. Ground products smaller than 3 μm with a median diameter of about 0.3 μm were obtained.

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Average
Top 10%
Average