ABSTRACT

Microscope-based automated image analysis systems have been used to obtain data regarding mineral liberation. However, this kind of analysis leads to stereological bias due to the intrinsic two-dimensionality characteristic of the technique. Three-dimensional imaging techniques such as X-ray microtomography comes as an alternative method to measure liberation. We explored the potentiality of high-resolution X-ray microtomography to investigate the characteristics of liberation of a Brazilian bauxite. Grade distributions in 2D and 3D were correspondent when all possible cross-sections were considered in 2D. However, 2D surface exposure did not converge accurately to the 3D method due to the loss of 3D information.

摘要

基于显微镜的自动图像分析系统已被用于获取有关矿物释放的数据。然而，由于该技术固有的二维特性，这种分析会导致立体偏差。三维成像技术（如 X 射线显微断层扫描）是测量解放的另一种方法。我们探索了高分辨率 X 射线显微断层扫描技术研究巴西铝土矿释放特征的潜力。当在 2D 中考虑所有可能的横截面时，2D 和 3D 中的等级分布是对应的。然而，由于 3D 信息的丢失，2D 表面曝光并没有准确地收敛到 3D 方法。