The size reduction process of rocks in cone crushers is one of the most important issues, particularly for the secondary and tertiary stages of crushing operations. In this study, 17 different rock types were considered for the evaluation of their size reduction variations that occurred in a laboratory-scale cone crusher. Based on several mineralogical, physico-mechanical, and aggregate properties determined for each rock type, the crushability tests were performed.

Before and after the crushability tests, particle size distribution (PSD) of the uncrushed (feed) and crushed (product) materials were determined by sieve analyses. On the basis of these PSDs, the degree of rock crushability (DRC) was attempted to quantify by simple approaches (i.e., size reduction ratio, SRR, and the theoretical square mesh aperture size that corresponds to the 10% of the cumulative undersize in the product, P₁₀ (mm)).

The crushability test results demonstrated that the DRC in cone crusher could be quantified by focusing on the variations in the SRR and P₁₀. The SRR and P₁₀ are associated with three important rock properties, Shore hardness (SH), Los Angeles abrasion loss (LAA, %), and Brazilian tensile strength (BTS, MPa). The textural and mineralogical features of rocks also have substantial impacts on the DRC for several rock types. It was concluded that the combination of the SRR and P₁₀ could be considered together for the evaluation of DRC in cone crushers. Moreover, further research potentials on the DRC were also discussed in this study.

圆锥破碎机中岩石的尺寸减小过程是最重要的问题之一，特别是对于破碎操作的第二和第三阶段。在这项研究中，考虑了17种不同的岩石类型，以评估它们在实验室规模的圆锥破碎机中发生的尺寸减小变化。基于每种岩石类型确定的几种矿物学，物理力学和骨料特性，进行了可压碎性测试。

在压碎性测试之前和之后，通过筛分分析确定未压碎（进料）和压碎（产品）物料的粒度分布（PSD）。在这些PSD的基础上，尝试通过简单的方法（例如，尺寸减小率，SRR和理论方形筛孔尺寸对应于岩石中累积的过小尺寸的10％）来量化岩石的压碎度（DRC）。产品，P ₁₀（mm））。

可破碎性测试结果表明，可以通过关注SRR和P ₁₀的变化来量化圆锥破碎机中的DRC 。SRR和P ₁₀与三个重要的岩石特性相关，肖氏硬度（SH），洛杉矶磨损损耗（LAA，％）和巴西拉伸强度（BTS，MPa）。岩石的结构和矿物学特征也对几种岩石类型的DRC产生重大影响。结论是，可以将SRR和P ₁₀的组合一起用于评估圆锥破碎机中的DRC。此外，本研究还讨论了有关DRC的进一步研究潜力。