关键词: 泥质难选氧化金矿, 氰化浸出, 摇床, Falcon离心机, 离心力场

Abstract: Based on the analysis of process mineralogy and exploratory experiments，the technical condition study on cyanide leaching-gravity separation process was conducted，to provide the technical basis for high efficient exploitation and utilization of a clayish oxide gold ore containing arsenic in Western Sichuan.The results showed that the gold leaching rate reached 76.55% under the grinding fineness of 95% passing 74 μm，dosage of lime at 1 000 g/t，NaCN dosage at 750 g/t，ration of liquid to solid 2∶1 for 36 h leaching.After the residue or tailings from cyanide leaching process are treated by roughing concentration with 6-S shaking table(stroke distance of 12 mm，stroke frequency of 300 r/min，table horizontal slope 2.5°，flush volume 2 m3/t，and feeding speed 5 kg/min) and scavenging separation with Type-B Falcon centrifuge of intermittent discharge(feeding speed 2 L/min，pulp concentration 15%，centrifugal field 225 g，recoil pressure 0.02 MPa，rotational frequency 60 Hz)，gold concentrate with Au grade of 33.79 g/t and recovery of 19.15% was received，and the total gold recovery reached 95.70% eventually.

Key words: Clayish refractory oxidized gold ore, Cyanide leaching, Shaking table, Falcon centrifuge, Centrifugal field