Abstract: A gold ore from a foreign mine contains 7.98 g/t Au，exist in fine，granular and rounded granular gold minerals closely associated with gold-bearing minerals like pyrite and arsenic pyrite.Based on the probe tests，beneficiation research was conducted by applying the process flow-sheet of gravity separation-flotation to realize efficient utilization of the ore.The results indicated that under the proper grinding fineness of 60% -0.074 mm and by an open-circuit separation of a shaking table of one roughing and one cleaning，one roughing，two cleaning and two scavenging，and the middlings returned to the previous operation deal with shaking table tailings，gravity gold concentrate with 450.00 g/t Au and recovery of 17.48% by was obtained，and flotation concentrate containing 54.20 g/t Au and recovery of 76.54% was achieved.Equivalently by the whole process，mixed concentrate will contain 64.80 g/t Au with Au recovery of 94.02%.As can be seen，the combined process of gravity separation-flotation is an appropriate and effective flow-sheet to treat the ore.

Key words: Gold ore, Pyrite, Arsenic pyrite, Gravity separation, Flotation