Flotation separation method for copper-lead-zinc mixed flotation concentrate pulp

The invention relates to a flotation separation method for copper-lead-zinc mixed flotation concentrate pulp. The method is composed of a copper-lead-zinc separation method and a lead-zinc re-separation method. The method for separating copper from lead and zinc comprises the steps of adding activated carbon into the copper-lead-zinc bulk concentrate pulp, adding sodium sulfide after wet ore grinding, stirring for 3 minutes, adjusting the pH value of the pulp to 6.5, and stirring for 3 minutes; and finally, conducting inflatable flotation, and obtaining copper concentrate and lead-zinc bulk concentrate ore pulp through the technological processes of one-time separation roughing, one-time separation scavenging and two-time concentration. The lead-zinc re-separation method comprises the steps of adding zinc sulfate into the lead-zinc bulk concentrate pulp, and stirring for 3 minutes to adjust the pH value of the pulp to be 7; and then adding diethyldithiocarbamate, stirring for 2 minutes, conducting flotation s