Agent and method for flotation separation of chalcopyrite-iron sulfide minerals

The invention belongs to the field of copper-iron sulfide mineral flotation, and particularly relates to a chalcopyrite-iron sulfide mineral flotation separation reagent and method, namely separation of chalcopyrite and iron sulfide minerals is achieved through the flotation reagent, and chalcopyrite concentrate is obtained. The flotation reagent comprises a collecting agent; the collecting agent comprises at least one compound with the structural formula as shown in the formula I. The research finds that the new collecting agent can be selectively adsorbed on the surface of the chalcopyrite, but the adsorption to the pyrite is very weak, so that the lime-free separation of the chalcopyrite can be realized, and a plurality of defects of a traditional lime method process are avoided. The chalcopyrite flotation collecting agent is used for chalcopyrite flotation for the first time, can replace a traditional sulfide ore collecting agent poor in selectivity, and is small in dosage, low in cost, free of inhibitors