关键词: 含碳砷金矿, 载金矿物, 嵌布粒度, 难处理金矿, 阶段磨矿, 阶段浮选

Abstract: 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-Ⅰwith 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.

Key words: Carbonaceous-arsenic bearing gold ore, Gold bearing minerals, Particle size dissemination, Refractory gold ore, Stage grinding, Stage flotation