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Particle Shapes Produced by Comminution in the Szego Mill
Author(s) -
Trass Olev,
Ramesh Koka V.,
Papachristodoulou George
Publication year - 1995
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19950120308
Subject(s) - comminution , breakage , grinding , agglomerate , materials science , mill , particle (ecology) , slurry , particle size , attrition , coal , metallurgy , composite material , chemical engineering , chemistry , geology , medicine , oceanography , dentistry , organic chemistry , engineering
The shapes of particles produced by comminution in the Szego Mill, a planetary ringroller mill, in different coal grinding operations show that particle shape is dependent on the type of operation, and help explain the breakage mechanisms. Dry grinding produces particles with a low aspect ratio due to interparticle attrition; significant briquetting of fine particles may occur. In slurry grinding flaky particles are produced which are selected for breakage at rates lower than those for granular particles. Similar observations have been made with other materials. Coal‐oil‐water grinding is accompanied by the formation of coal‐oil agglomerates. Their breakage produces uniform particles with a low aspect ratio due to interparticle attrition within the agglomerates.