Particle Breakage and Attrition

Kalman, Haim

doi:10.14356/kona.2000017

Cited by 34 publications

(5 citation statements)

References 36 publications

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“…Particle breakage may be induced desirably as in milling or undesirably by attrition, thereby altering particle properties, namely size distribution, shape, surface area, and other physical and chemical attributes, such as dissolution. Particularly in chemical and process industries, the operation and economy of manufacturing processes are 13 affected by such changes [1]. Breakage can negatively affect the quality and characteristics of 14 the product and the function of the equipment, as well as the environment due to dust formation, 15 but it can also positively affect the manufacturing process, e.g.…”

Section: Introductionmentioning

confidence: 99%

Impact breakage of acicular crystals

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Impact breakage of acicular crystals

et al. 2020

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“…Impact [13][14][15][16][17][18], wear [19], side crushing [20][21][22][23] and indentation [24] are some of the test methods used for single particles. According to Ghadiri et al [12], these methods have relatively well-defined conditions and can be used to study the influence of stress field and materials properties on particle breakage; however, due to simplicity of these methods, they are not fully representative of industrial conditions.…”

Section: Impact Attrition Of Spray-dried Burkeite Particlesmentioning

confidence: 99%

Impact attrition of spray-dried burkeite particles

et al. 2016

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Particle attrition in manufacturing plants handling particulate solids could cause processing as well as environmental problems, and lead to the degradation of product quality. Spray-dried powders are particularly prone to attrition because of their porous and often weak structure. Spray-dried burkeite particles are a good example and have been used as a model porous powder to investigate the effect of structure on their breakage propensity. The particles are subjected to well-defined stresses due to impact, and the change in the particle size distribution is determined by particle size analysis based on sieving. It is found that impact breakage of burkeite is affected by the structure, and some unexpected trends for breakage are observed; for a given impact velocity some smaller particle sizes break to a greater extent as compared with larger particles. This is attributed to uncontrollable variations of porosity (and hence particle envelope density) as a function of size. To study the effect of porosity on attrition of the spray-dried powders, structure visualisation and analysis have been carried out by Scanning Electron Microscope (SEM) and X-ray microtomography (XRT). SEM images show three levels of structure in a single particle of spray-dried burkeite. Based on the XRT results, the particle envelope density increases as particle size increases, and the variation of envelope density influences the impact breakage. Once the relevant values of the envelope density are taken into account, then the trend of impact breakage data becomes as expected, and the material mechanical properties of the particles can be inferred from the breakage results.

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“…Compaction of powders is widely used in fields such as pharmaceutical tableting, soil consolidation, mineral processing, and powder metallurgy [1]. At large pressure, particles may experience breakage, which affects not only compaction behavior but also the structural and mechanical properties of formed compacts [2].…”

Section: Introductionmentioning

confidence: 99%

DEM investigation of the effect of particle breakage on compact properties

Gou

Yang

2021

EPJ Web Conf.

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Particle breakage during compaction affects compaction behavior and the quality of the formed compact. This work conducted a numerical study based on the discrete element method (DEM) to investigate the effect of particle breakage on compaction dynamics and compact properties, including particle size and density distributions, and pore properties. A force-based breakage criterion and Apollonian sphere packing algorithm were employed to characterize particle breakage behavior. The pore structures of the compacts were characterized by the watershed pore segmentation method. Calibrated with experimental data, the model was able to simulate the stress-strain relation comparable with experimental observation. During compaction, the particles were gradually broken from top to bottom with increasing pressure. Both density and pore size of the compacts had relatively uniform distribution at larger stress, while the pore size decreased sharply when the particles started to break, indicating that the smaller fragments in the compact system have a significant effect on the pore size distribution.

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Particle Breakage and Attrition

Cited by 34 publications

References 36 publications

Impact breakage of acicular crystals

Impact breakage of acicular crystals

Impact attrition of spray-dried burkeite particles

DEM investigation of the effect of particle breakage on compact properties

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