Abstract: The tailings discarded by a certain lead-zinc concentrator in Guizhou are characterized by high oxidation of lead-zinc minerals, fine particle size, serious sliming and difficult dressing.A technical process consisting of preferential-bulk flotation of sulfide minerals, zinc-sulfur separation of bulk flotation concentrate and sulfuration-flotation of oxidized lead minerals was adopted and gained good test indexes, and then used in production, which effectively and comprehensively recovered the lead, zinc and sulfur minerals that would have otherwise been lost, with the lead grade and recovery of oxidized lead concentrate being 48.56% and 85.38%.

Key words: Lead-zinc tailings, Oxidized lead, Sulfuration flotation, Comprehensive recovery