Abstract: The gold grade of a sulphide gold ore in Gansu is 3.34 g/t,the main gold bearing minerals are pyrite,arsenopyrite and galena.In order to determine the reasonable development and utilization process of the ore,the ore dressing test was carried out.The results showed that the gold concentrate with gold grade of 47.44 g/t and recovery rate of 91.87% was obtained by using one roughing two cleaning three scavenging and middings back to the flowsheet in turn process,with condition of grinding particle size of -200 mesh accounted for 70%.And the separation effect was ideal.

Key words: Gold ore, Gravity separation, Flotation