Experimental Study on the Beneficiability of a Gold Ore in Tibet

In order to provide a suitable mineral processing technological scheme for rational exploitation and utilization of the refractory gold ore in Tibet,an experimental study on beneficiability of the ore has been carried out under the conditions of laboratory scale.The results of comparative tests of single flotation flowsheet and combined flowsheet of gravity separation-flotation separotion showed that compared with single flotation technology,the combined flowsheet of gravity separation-flotation separation can obtain a gold concentrate with slightly higher gold recvery than that of single flotation flowsheet.However,the combined flowsheet of gravity separation-flotation separation is more complicated and the grade of gold is comparatively low.Under the conditions of selecting single flotation flowsheet and using sulfuric acid as an activator,a satisfactory gold concentrate with gold grade of 71.92g/t,gold recovery of 96.40% was produced.The technological flowsheet consists of one stage roughing flotation,one cleaning flotation and one stage scavenging flotation.The grade of gold in tailings is 0.17g/t.