江西某含碳砷难处理金矿石浮选试验

Beneficiation of Carbonaceous-Arsenic Bearing Refractory Gold Ore in Jiangxi

江西某含碳砷金矿石金品位为2.89 g/t,碳、砷含量分别为0.96%和0.36%。为高效开发利用该金矿资源,采用粗磨回收粗粒载金矿物、细磨回收细粒载金矿物的阶段磨矿、阶段浮选原则流程进行了选矿试验。结果表明:在磨矿细度为-0.074 mm占60%的情况下,采用1粗2扫2精、中矿顺序返回流程主要回收碳质物中的金,获得的金精矿1的金品位为69.91 g/t、金回收率为45.19%;在再磨细度为-0.074 mm占90%的情况下,采用1粗2扫2精、中矿顺序返回流程回收细粒载金矿物中的金,获得的金精矿2的金品位为32.82 g/t、金回收率为47.99%;2种精矿的金总回收率达93.18%。试验确定的工艺流程是该矿石的高效开发利用流程。

There is 2. 89 g / t gold,0. 96% carbon,and 0. 36% arsenic in a C-As bearing gold ore in Jiangxi Province. In order to high efficiently develop and utilize the ore,beneficiation experiments were carried out by primary grinding to recover coarse gold bearing minerals and fine grinding to recover fine gold bearing minerals in stage grinding and stage flotation process. The results indicated that： gold-concentrate-Ⅰ with gold grade of 69. 91 g / t and recovery of 45. 19% was obtained through the process of one roughing-two cleaning-two scavenging and middlings back to the flow-sheet in turn to recover gold in carbonaceous materials at the ore grinding fineness of 60%-0. 074 mm; gold-concentrate-Ⅱ with gold grade of 32. 82 g / t and recovery of 47. 99% was obtained through the process of one roughing-two cleaning-two scavenging and middlings back to the flow-sheet in turn to recover gold in fine gold-bearing minerals at the regrinding fineness of 90%-0. 074 mm. The gold total recovery of the two concentrate is 93. 18%. The process in the experiments can high efficiently develop and utilize the ore.