RECOVERY OF MINERALS FROM ULTRABASIC ROCKS

摘要

A process for the metallurgical treatment of pyroxenite-type ore, which comprises comminuting the ore to a particle size range of between about 40 and 600 micron, or alternatively between about 40 to 1000 micron, and thereafter subjecting the comminuted ore to dry HIMS to recover a non-attracted apatite concentrate from weakly attracted silicate minerals contained in the pyroxenite ore. Another aspect of the invention relates to the recovery of phlogopite and/or vermiculite from more weakly attracted diopside and non-attracted apatite by dry HIMS. A further aspect of the invention relates to particle size fractionation by pneumatic classification followed by dry HIMS, electrostatic separation and dry HIMS, and electrostatic separation alone, applied respectively to fine, medium, and coarse particle size fractions respectively to recover apatite from silicate minerals contained in pyroxenite ore.