Abstract: In order to provide some guidance to the research on development and utilization of a porphyry and low—grade gold—bearing copper ore,the process mineralogy on the ore was conducted.The result showed that the raw ore contained 0.44% Cu and 0.092 g/t Au,the object ore is mainly chalcopyrite,secondly covelline and bornite,all of which have simple mineral dissemination characteristics and easily to be liberated.The gold mostly exposed,the gold content is a little related to sulphide ore and non—sulphide ore.The contents of pyrite and gangue minerals are high and their compositions are very complex,which will be the main factor on the separation of these useful minerals.The study showed that the processing of coarse—grained tail—throwing and fine—grained separation was suitable for this ore.It was predicted that the theoretical recovery of copper is between 82.98% and 89.59%,and the recovery of gold is 78%~84%.

Key words: Gold—bearing copper ore, Process mineralogy, Coarse—grained tail—throwing, Fine—grained separation, Theoretical recovery rate