Abstract: The complex multi-metal ores contain many valuable metallic elements like gold,silver,copper,lead and zinc.The paper mainly focuses on gold and silver recovery by the flotation.The gold and silver content in raw ores is 2.40 g/t and 150.00 g/t respectively.Under the condition of grinding to85% -0.074mm and a suitable reagent,and in view of the ore's property,some technical measures as strengthening disperse sludge and floatation are adopted in tests.A good concentrate with gold grade of 27.15g/t at a 50.19% recovery and silver grade of 2181.66 g/t at an 60.42% recovery can be obtained from the process of one celerity flotation,one rough,two cleaning and two scavenging separation.

Key words: Multi metal oxidized gold ore, Celerity-flotation, Dispersing sludge