New flotation technique of lead zinc sulphur ore

The invention relates to a new technology for lead zinc sulfide ore floatation. Lead sulfide mineral is preferably carried out with mixed floatation in a neutral or weak alkali medium, then zinc floating and lead sulfur separation are carried out in a high alkali medium. The lead sulfide mineral is firstly floated to enter product, before zinc floating, lead sulfide mixed product is obtained, only pure zinc mineral enters slurry in a zinc floating work zone, thus being beneficial to zinc floatation and avoiding the operation method of heavy pulling and heavy stress; and lead tailing has no sulfur mineral, thus reducing useless poor circulation formed in zinc floating of the sulfur mineral, saving the beneficiation reagent and improving the sorting standard.