Abstract: The gold in a gold mine in Shaanxi is mainly composed of micro and super micro natural gold particles,to resonable develop and utilize the gold resources,gravityflotation combined beneficiation was cjonducted according to the ore properties,gravity separation study was using Nielsen concentrator.The final obtained gold grade of gold concentrate 1 is 5 250 g/t,gravity tailings via flotation,gold grade of gold concentrate 2 is 41.17 g/t,total gold recovery is 95.45%,gold grade of tailings is 0.09 g/t.Compared with single process,application of combined process is benifit for obtain better metallurgy index,the resources can be better resonable develop and utilization.

Key words: Lean sulfur gold ore, Fine particle gold, Knelson concentrator, Gravityflotation combined process