A Method for On-line Coarse Particle Size Measurement

Lee, Kuang Y. ; Herbst, John A.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 16
Publication Date: Jan 1, 1992
Coarse particle size measurement is essential for the automatic control of a size reduction process like crushing or SAG milling in order to achieve optimal process performance. However, the on-line size measurement of coarse material is not easily obtained due to the problems of material handling and sample statistics. A technique based on advanced image analysis and quantitative stereology has been successfully developed and tested in a pilot scale setting. The chord length distribution of coarse particles on a moving conveyor was measured with an image analyzer and then transformed to the mesh size distribution with a stereological model and a special numerical method. Some test results as well as the technique's industrial suitability and limitations of this method are also discussed.
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