Method for separating copper-lead sulfide minerals by adopting lead-zinc sulfide ore tailing backwater

The invention discloses a method for separating copper-lead sulfide minerals by adopting lead-zinc sulfide ore tailing backwater, which comprises the following steps of: adding ore pulp pretreatment operation before active carbon reagent removal, quickly digesting a collecting agent remained in the backwater, quickly generating and separating out harmful ions, and forming a stable micro-fine particle aggregate through in-phase and out-phase condensation; and meanwhile, the pretreatment agent forms a hydrophilic film on the surface of the lead mineral, so that the originally hydrophobic surface of the lead mineral is hydrophilic, finally, under the action of activated carbon, the electric double layer structures on the surfaces of all the minerals are broken, the fresh surfaces of mineral crystals are exposed, and the copper mineral and the lead mineral are separated under the action of the activated carbon, a lead inhibitor and a copper collecting agent which are added subsequently. According to the method, c