Flotation separation inhibitor for chalcopyrite and pyrite as well as preparation method and application of flotation separation inhibitor

The invention provides a flotation separation inhibitor for chalcopyrite and pyrite as well as a preparation method and application thereof, and relates to the technical field of mineral separation. Specifically, the flotation inhibitor comprises carbonized sodium cyanurate, alkaline thiourea, alkaline polymeric iron and carbonate; when the flotation separation of the chalcopyrite and the pyrite is carried out, minerals are ground and graded firstly, then flotation separation is carried out through the steps of one-time roughing, two-time scavenging and two-time concentration, and a copper concentrate product is collected and obtained. According to the method, the defects that the copper-iron separation effect is poor in the flotation separation process of the chalcopyrite and the pyrite, and the copper recovery rate is low due to the fact that lime is added can be overcome; by means of the flotation process, the recovery rate of copper in the copper concentrate can reach 92.48%, and the flotation process has