Abstract:The process of distillation, ozone oxidation, sulfuric acid leaching was put forward to treat flotation sulfur tailings from oxygen pressure zinc leaching. The main treatment methods are distillation to recover elemental sulfur, ozone oxidation-dilute sulfuric acid leaching to recover valuable elements from flotation sulfur tailings. The recovery rate of sulfur element in flotation tailings can reach 92% above under the conditions including temperature of 400 ℃, distillation time of 0.5 h, and carrier gas flow rate of 400 mL/min. Ozone can promote the leaching of Fe, Cu, As, Zn and other elements in sulfur tailings. The leaching rate of Fe, Cu, As and Zn is 73.08%, 90.97%, 89.69% and 99.03% respectively under the conditions including temperature of 80 ℃, time of 2 h, L/S=6, oxygen flow of 400 mL/min, sulfuric acid concentration of 1.6 mol/L, and stirring speed of 400 r/min.