The sulfide minerals of a refractory molybdenum tailings in Henan are mainly pyrite,with a content of 2.293%and sulfur content of 1.60%.The sulfur element mainly exists in the form of pyrite.In or-der to recover sulfur from tailings,under the condition of grinding fineness of-74 μm accounted for 65%,with copper sulfate as activator,butyl xanthate as collector,and new reagent YZ-4 as fluorine inhibitor,by closed-circuit test of one roughing,two cleaning and two scavenging flotation.The sulfur concentrate with sulfur grade of 48.96%,recovery of 80.75%and impurity fluorine content of 0.02%is obtained.It can pro-vide reference for the recovery of valuable metals from similar molybdenum tailings resources.
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