Abstract: The oxidized gold ore in Gansu contains 2.25 g/t gold and associated silver can be comprehensively recovered.Gold mainly exists in form of independent mineral，most gold ore were wrapped in gangue minerals，like quartz，few others was inlayed in the cracks of pyrite，magnetic pyrite，sphalerite，chalcopyrite and galena with the form of fine particles.In order to high efficiently utilize the resource，mineral processing-metallurgy combination experimental research was carried out based on process mineralogy.The results indicate that the mixed concentration with gold grade and recovery of 74.2 g/t and 91.28% can be obtained at the grinding fineness of 73.00% passing 0.074 mm，via one roughing-one cleaning-two scavenging floatation operation，and gravity separation for floatation tailings.Gold leaching rate of 96.52% and total recovery of 88.10% was obtained by lime pretreatment with mixed concentrate and then leaching by sodium cyanide.The experimental results can provide technology basis for beneficiation of the ore in same type.

Key words: Oxidized gold ore, Activated flotation, Gravity separation, Cyanidation leaching, Mineral processing-metallurgy combination process