Kinetic Energy of Fragment and Sound Energy of Fracture in Single Particle Crushing

Abstract

In single particle crushing, sphere specimens (nominal diameter of 2.0 cm) made of glassy materials and three kinds of minerals were used to determine conversion percent of fracture energy into kinetic energy of fragments and sound energy of fracture. From the experiments, the following results were obtained. 1) Cumulative conversion percent of fracture energy into total kinetic energy was 38.6 % in borosilica glass, 28.0 % in soda glass, 10.7 % in quartz, 5.7 % in feldspar, 2.0 % in limestone. 2) Conversion percent of fracture energy into sound energy of fracture was 10^-410^-5 % in all kinds of samples. Their values in five kinds of samples decreased with decrease in total kinetic energy of fragments.