关键词: 铅锌尾矿, 铁闪锌矿, 活化剂

Abstract: There are plenty of sphalerite，pyrite and pyrrhotite in early stage of a Pb-Zn tailing in Fujian. These minerals belong to high-quality secondary resources,and has recovery value.Study on the Zn concentration from representative samples of early tailings were carried out. The results showed that under regrinding fineness of -200 mesh 90% for the sample，Zn concentrate with Zn grade of 45.50% and zinc recovery of 67.05% was obtained by adopting the process of one roughing，three-cleaning，two-scavenging and middles back to the flow-sheet in turn. The reason for difficulty in improving Zn recovery is that there are only 55.92% of Zn existing in floatable Zinc Sulfide，and the remains are in difficult-to-float Zinc salt.

Key words: Pb-Zn tailings, Marmatite, Activator