关键词: 铜尾矿, 综合回收, 再磨

Abstract: For a copper tailing in Guizhou with fineness of 40.17% passing 200 mesh，its valuable minerals are mainly chalcopyrite，pyrite，pyrrhotite and bornite，with a small amount of gold and silver associated.Chalcopyrite，closely associated with pyrite，pyrrhotite，exists in fine or micro-fine form，some of which are too fine to be liberated.Gold mainly exists in form of natural gold or enclosed by chalcopyrite.In order to high-efficiently develop and utilize the secondary resources，the experiment on recovery of copper-gold is carried out.The results show that，at the grinding fineness of 80% passing 200 mesh，through the processes of one roughing-two cleanings-two scavengings，concentrate 2 regrounded to 85% passing 325 mesh and then through two cleanings，and middlings back to the flow-sheet in order，Cu-Ag concentrate with copper，gold，silver grade of 13.05%，18.75 g/t，229.62 g/t，and recovery of 58.70%，56.66%，43.72% is achieved respectively.

Key words: Copper tailings, Comprehensive recovery, Regrinding