西藏某金矿石可选性试验研究

Experimental Study on the Beneficiability of a Gold Ore in Tibet

对西藏某难处理金矿石进行了可选性试验研究。单一浮选和重—浮联合流程的对比试验结果表明,重—浮联合流程所获得的金精矿金回收率指标较单一浮选工艺略高,但其流程更加复杂,金品位较低。单一浮选工艺,采用硫酸为活化剂,经一粗一精一扫,可获得品位71.92g/t、回收率96.40%的金精矿,尾矿含金可降至0.17g/t,该选别指标较为理想。

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.