Experimental Investigation of Particle Size Alteration and the Selective Crushing Phenomenon of Gangue during the Jaw Crushing Process

This study examines the particle size and distribution of main chemical components gangue during crushing process. Coal mine was chosen as research object, its at various crusher discharge settings were examined through screening, grinding, composition testing, other methods. The findings demonstrate that characteristic in model has a logarithmic upward trend width port increases. In contrast, uniformity index shown an exponential downward trend. analysis rate enrichment ratio different widths shows exhibits obvious selective each component is affected by screen aperture to extents. As increases, elements CaO MgO are enriched coarse-grained products, while those containing Fe2O3 from fine-grained coarse-grained. Gangue particles Al2O3, SiO2, C product. addition, analyzing alterations intervals, it found amount first rises then falls, follows pattern. results have significance for guiding selection resource utilization methods with sizes after crushing.