Abstract
Article concerns the issues of ore comminution in HPGR. A series of laboratory tests were carried out for three lithologic types of sulphide ore. Four values of operating pressing force were accepted. Bond’s index value, determined with using a standard Bond method, was also determined for all HPGR products. There were also determined functional relationships between Bond index and operational pressure. Results of investigation showed, that application oh HPGR for that type of feed resulted in lowering the value of Bond index. The relationship between the pressing force and Bond index can be approximated with hyperbolic function.
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