Abstract
Single-particle breakage test is becoming increasingly popular, as researchers seek to understand fracture response that is purely a function of the material being tested, instead of that which is based on the performance of the comminution device being used. To that end, an empirical breakage probability model that builds on previous work was proposed. The experimental results demonstrate the significance of both energy input and the number of repeated breakage attempts. Four different materials were compared, to gain a better insight into the breakage response. This modelling work goes further from previous research of the authors, by showing that not only does size related threshold energy and repeated impacts characterize particle breakage properties, but each material exhibits unique trends in terms of how its threshold energy and its rate of deterioration varies with particle size and each impact, respectively. This behaviour can be attributed to the different mechanical characteristics of the material and their flaw distribution. The importance of these aspects was highlighted.
Highlights
For quite some time, researchers have been pursuing an understanding of particle fracture at a fundamental level
Though the major goal of this research is to develop a scheme for using discretewhich element (DEM) to predict grinding descriptions of breakage probability by repeated impacts were proposed by Bonfils et al [24]; rate in ball mills, the present work is limited to adequately modelling particle breakage response to Tavares and King [25]
The fracture response of particles to energy input is dependent on the material types and flaw size and density, which varies with particle size
Summary
Researchers have been pursuing an understanding of particle fracture at a fundamental level. This approach is necessary, as it would help in the design of equipment that achieves the most desirable outcomes. There has been appreciable progress to some extent, in most cases, the understanding is more focused on the equipment comminuting the particles. The JKMRC introduced a single breakage test equipment to establish a way of separating material breakage properties from the influence of equipment. This, introduces the challenge of relating material breakage response data obtained independent of the target comminution device to the performance to be expected. As Delboni and Morell [1] point out, the identification of the mechanisms involved in comminution equipment is imperative for the successful modelling of its comminution process
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