AN ASSESSMENT OF INFLUENCE OF SELECTED CHARACTERISTICS OF FEED ON THE RESULTS OF BALL MILL GRINDING PROCESS COURSE FOR POLISH COPPER ORES

The article concerns issues related to the copper ore ball mill grinding process, operating at different technological parameters. aim of study was investigate influence various parameters and feed characteristics on selected effects (comminution degree, yields finest particle size classes, ready for downstream flotation operations). research program included tests two lithological types Polish (dolomite sandstone) their mixtures in proportions: 70% dolomite +30% sandstone 30% +70% sandstone. Material treated under wet dry Bond’s mill. Three time were applied together with three levels mill’s rotational speed. material compositions used rests. results show that increases fine fractions each sample are dependent composition feed, speed Together increasing time, fraction contents increase too, especially coarse without particles. In general, higher comminution degrees obtained mixtures, most favorable a mixture dolomite, where S 50 equaled 358 90 = 178. Correlation analysis showed fact all investigation significantly effectiveness.