A new Apparatus for Measuring the Impact Fracture Energy of Ore Particles:Taking Fluorite and Quartz as Examples
The ball mill mechanism model describes the grinding process at a microscopic level,where accurately deter-mining particle fracture energy is essential.The research team developed a novel testing device for measuring the fracture ener-gy of ore particles,utilizing a piezoelectric impact force sensor as its core component.This device enabled the team to conduct single-particle impact tests on quartz and fluorite,investigating factors such as impact head shape,mineral type,loading rate,and particle size affect fracture energy.The results revealed that the impact force-time relationship curve can effectively indi-cate the occurrence of primary fractures.It was found that the shape of the impact head—whether flat,rounded,or with rounded curvature—has minimal effect on fracture energy.The differences in fracture energy among various minerals are linked to their mechanical properties.Additionally,the loading rate significantly influences fracture energy.Fracture energy also exhibits a size effect,decreasing with smaller particle sizes while the ratio of fracture energy increases.Moreover,spline interpolation and the Tavares particle size distribution model were employed for regression analysis of the particle size distribution of fracture energy,achieving a goodness of fit(R2)of 0.9.The development of this particle fracture energy testing device within the ball mill sim-ulation model enhances our understanding of the fundamental theories governing the grinding process.
ball millparticle fracture energysingle particle impactTavares model
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