Breakage Behavior of Quartz Under Compression in a Piston Die

  • Abdel-Zaher M. A. Abouzeid
  • A. A. S. Seifelnassr
  • G. Zain
  • Y. S. Mustafa


The main forces acting on minerals in conventional size reduction units are compression, impact, attrition, and/or abrasion. Usually a combination of these forces shares the breakage action of the minerals with one or more of these forces dominating the breaking action, depending on the machine used. The present work concentrates on the behavior of quartz when stressed with compression force in a confined piston die. Several size fractions within the size range minus 10 mm to plus 0.85 mm were compressed in the piston die. The measured parameters are compression load, bed thickness, displacement as a result of compression, rate of displacement, and the size distribution of the products. It was found that the size distributions are, to some extent, different from those produced by the ball mill or the high-pressure roll mill. This is mainly because of the differences in the type of the acting forces in each case. It was also found that the cumulative weight of the distributions is reasonably normalizable with respect to the median particle size of the product. The specific energy expended is inversely proportional to the median size of the products, and the reduction ratios, xf/xp, are directly proportional to the applied compression force, and hence, to the specific energy expended. A simple model is suggested for predicting the particle size distribution as a function of the expended energy. The calculated values of the size distributions match fairly well with the experimental values, except at the very low energy levels, where most of the energy expended is consumed in the rearrangement and packing of the particles in the confined space with little or no breakage.


Confined bed comminution Piston die Size reduction Quartz 


Compliance with Ethical Standards

Conflict of Interest

The authors declare that there is no conflict of interest.


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Copyright information

© The Society for Mining, Metallurgy & Exploration 2018

Authors and Affiliations

  1. 1.Faculty of EngineeringCairo UniversityGizaEgypt
  2. 2.Faculty of Petroleum and MineralsSuez UniversitySuezEgypt
  3. 3.Islamic UniversityKhartoumSudan

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