Understanding the mechanisms of the breakage of ore particles is important to predict the particle size distribution in size reduction operations. This paper aims to show the presence of common breakage modes in impact breakage and ball milling of the cement clinker and chromite samples. For that purpose, narrow size fractions of the two samples were broken in a drop-weight tester or ball mill by changing the degree of applied energy. Then the resultant size distributions were evaluated to seek evidence for the common breakage modes. The results showed that increasing the breakage energy will produce a systematic change in the shapes of the size distributions, suggesting a sequential set of breakage modes. The breakage is initially due to tensile stresses at low breakage energies and compressive stresses at high breakage energies. Further studies should be done to assess if these breakage modes occur at size-reduction of different ores.

了解矿石颗粒破碎的机理对于预测粒度减小操作中的粒度分布很重要。本文旨在说明水泥熟料和亚铬酸盐样品在冲击破碎和球磨中常见的破碎方式。为此，通过改变施加能量的程度，在落锤试验机或球磨机中破碎了两个样品的窄尺寸部分。然后评估所得的尺寸分布，以寻找常见破损模式的证据。结果表明，增加断裂能将使尺寸分布的形状发生系统性变化，表明断裂模式是连续的。断裂最初是由于在低断裂能量下的拉应力和在高断裂能量下的压应力引起的。