### CORRELATION BETWEEN BOND WORK INDEX AND …

CORRELATION BETWEEN BOND WORK INDEX AND MECHANICAL PROPERTIES OF SOME SAUDI ORES Gamal S. Abdel Haffez ... and grinding processes [12]. In order to design the comminuting process of a r ock, the ... F 80 is the size in (µm), at which 80 percent of the new feed to ball mill passes, P 80 is the size in (µm), at which 80 percent of the last ...