The invention discloses a fine flaky-
cryptocrystalline mixed
graphite separation technique which comprises the following steps: primary rough
grinding and rough separation, quintic regrinding and sextic concentrating, and middling centralized
processing. According to the technique, in the rough separation step, the
grinding fineness is -0.074mm, and the content is 90-95%; in the concentrating step, the regrinding
fineness is -0.045mm, and the content is 90-95%; and thus, the
graphite monomer is sufficiently dissociated, thereby sufficiently ensuring the
fixed carbon content and
recovery rate of the concentrated concentrate. The technique adopts gradually decreased low concentrating concentrations in multiple concentrating process to ensure the
dispersity of ore
slurry, thereby solving thesevere problem of entrapped impurities in floatation foam; and thus, in the final concentrate, the
fixed carbon content is 91.35%, and the
recovery rate is 91.30%, thereby solving the problems of lowtechnical indexes, low grade, low
recovery rate and high cost in the fine flaky-
cryptocrystalline mixed
graphite concentrate separation, so that the fine flaky-
cryptocrystalline mixed graphite ores are utilized in an efficient, economical and reasonable way.