Abstract: In view of characteristics of close associated relationship with each other and owns complicated ore nature and fine dissemination size of valuable mineral for a copper-lead-zinc sulfide ore in Baiyu, the beneficiation tests were carried out by the process of preferential flotation of copper and lead,lead and zinc, pressure leaching of copper-lead mixed concentrate.And by regrinding rougher lead concentrate, new type special collector EM-WB-12 was added.Then, copper-lead mixed concentrate mixture with Cu and Pb grade of 5.15% and 22.94% at a 85.00% Cu recovery and 53.38% Pb recovery, lead concentrate with Pb grade of 52.68% at a 30.13% recovery were respectively achieved.Also, the associated silver in ores was effectively enriched.Taking pressure leaching to Cu-Pb mixed concentrate, got the leaching rate of Zn at 94.36% and Cu at 91.21%,the grade of Pb ofter dressing at 40%.Based on the tests of laboratory, pilot test were organized, The results fully confirm the reliability of those from laboratory tests.

Key words: Copper-lead-zinc sulfide ore, Fine-disseminated, EM-WB-12 collector, Pressure leaching