A general quantification method for addressing stereological bias in mineral liberation assessment in terms of volume fraction and size of mineral phase
A general quantification method for addressing stereological bias in mineral liberation assessment in terms of volume fraction and size of mineral phase
复制标题
用于解决矿物释放评估中矿物相体积分数和尺寸方面的体视偏差的通用量化方法
DOI：
10.1016/j.mineng.2018.01.034
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发表时间：
2018
影响因子：
4.8
通讯作者：
Koyanaka Shigeki
中科院分区：
文献类型：
--
作者：
Ueda Takao;Oki Tatsuya;Koyanaka Shigeki
矿石颗粒的矿物释放评价通常涉及到颗粒截面的二维测量，这种二维测量不可避免地会由于体视学偏差而导致误差。这种偏差被认为受到颗粒内部矿物结构的强烈影响，但其总体特征尽管从概念上进行了研究，但到目前为止还缺乏量化基础。在本研究中，基于Voronoi模型对具有内部矿物结构的颗粒进行了系统的数值研究，对随机颗粒截面的三维自由度与二维自由度进行了比较。通过这种方式，首次实现了根据矿物相的体积分数和大小对立体学偏差进行全面的定量表征。
Mineral liberation assessment of ore particles generally involves two-dimensional (2D) measurement of particle cross-sections, and this 2D measurement inevitably results in error due to stereological bias. This bias is considered to be strongly influenced by the internal mineral structure of the particles, but its overall characterization, though investigated conceptually, has hitherto lacked a quantitative foundation. In this study, a systematic numerical study was conducted on particles with an internal mineral structure based on Voronoi modeling, in which three-dimensional degrees of liberation were compared with their 2D counterparts, for random particle cross-sections. In this way, for the first time, overall quantitative characterization of stereological bias, in terms of the volume fraction and size of the mineral phase, was achieved.