Abstract: Molybdenum and copper content in a copper-molybdenum ores is low, Cu-content is 0.081% and Mo-content is 0.19%. The disseminated size of Cu minerals is fine and symbiosis with molybdenum ores, that take difficult to separation of Cu and Mo. By using the flowsheet of bulk flotation of Cu and Mo, regrinding and re-concentrantion after mixed concentrate cleaned, and then separation of Cu and Mo, the experiment index of concentrate grade of Mo at 45.30%, the recovery of Mo at 84.16%, the concentrate grade of Cu at 14.28%, the recovery of Cu at 89.59% were got on the condition of the size of the first and the second grinding each -0.074 mm 70%, -0.045 mm 95%, using lime, sodium silicate as modifier, using butylamine black agent and kerosene as collector in the mix-flotation, using lime, water glass and SK as the modifier, using kerosene as collector in the separation flowsheet of Cu and Mo.

Key words: Low grade copper-molybdenum ore, Bulk flotation of Cu and Mo, Regrinding, Separation of Cu and Mo