PHYSICO-MECHANICAL PROPERTIES OF A MIXED-TYPE SULPHIDE-OXIDE ORE FROM A PORPHYRY-COPPER DEPOSIT

ABSTRACT. Porphyry-copper deposits have significant economic importance as the primary source of copper. Laboratory studies were performed to determine the grindability of a mixed type of sulphide-oxide ore from a porphyry-copper deposit by a particle size analysis carried out at different grinding time (5, 7, 10, 13, 17, 22 min) of the ore feed. The liberation degree of the ore minerals in the different fractions of the milled ore has been determined by microscopic studies. The distribution of component Cu by fractions of the ore, ground to 65% of the 0.080 mm class was determined. A laboratory Bond test was performed, and the Bond Work Index was determined. The results of the conducted research show that the studied mixed sulphide-oxide ore is characterised by relatively easy grindability.