Abstract: There is 9.87% lead,6.25% Zn in a lead-zinc tailings from Gejiu,Yunnan.Most of lead,zinc packaged each other with gangue,it is difficult to separate lead from zinc.Zinc leaching-gravity separation by shaking table experiment was put forward to recovery lead and zinc.Test results showed that:leaching temperature is 70 ℃,dosage of sulfuric acid is 15%,dosage of hydrofluoric acid is 15%,granularity of leaching materials extract is -0.5 mm,liquid-solid ratio is 1.5,leaching time is 120 min,zinc leaching rate can reach 97.02%,Pb grade of leaching residual is 15.37%,leaching residue ground to90% passing 0.045 mm,via one roughing-one cleaning gravity separation by shaking table,lead concentrate with lead grade 45.68%,0.24% Zn,lead recovery rate of 89.98% was obtained,separation effect of lead and zinc is good.After leaching process,crystalline state of leaching residual is dense,and new mineral phrase was generated；lead changes into indissolvable lead sulfate,zinc changes into soluble zinc sulfate during leaching process,lead and zinc was separated through solid-liquid separation.

Key words: Lead-zinc tailings, Leaching, Separation of lead and zinc, Shaking table gravity separation