(1. 中南大學 冶金與環(huán)境學院，長沙 410083；
2. 中國有色金屬工業(yè)協(xié)會 中國清潔冶金工程研究中心，長沙 410083)
摘 要: 以氧壓渣為原料，考察酸性硫脲體系和堿性多硫化物體系碳浸法浸金效果，對浸出過程礦相行為進行分析。結(jié)果表明：堿性多硫化物體系較酸性硫脲體系金浸出率高30%，堿性多硫化物體系包裹金得到釋放和暴露，利于金的高效浸出。在堿性多硫化物體系下考察各因素對金浸出率的影響并確定最優(yōu)浸出條件，在最優(yōu)條件下，金的浸出率達85%以上。開展深度浸金研究，超聲波強化金浸出率達89.77%，超細磨金浸出率達91.95%。
關鍵字: 氧壓渣；非氰體系；硫脲；多硫化物；浸出；金
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Cleaner Metallurgical Engineering Research Center, China Nonferrous Metals Industry Association, Changsha 410083, China）
Abstract:Using oxygen pressure leaching residue as raw material, the leaching behavior of carbon leaching in acidic thiourea system and alkaline polysulfide system was investigated, and the mineralogical change during leaching was analyzed. The results show that the gold leaching rate using the alkaline polysulfide system is 30% higher than that of acidic thiourea system, and gold is exposed and released in alkaline polysulfide system, which is conducive to the efficient leaching of gold. The influences of various factors on the gold leaching rate were investigated in the alkaline polysulfide system, and the optimum leaching conditions were determined. Under the optimal conditions, the gold leaching rate is over 85%. A study on enhanced gold impregnation is carried out, the ultrasonic gold leaching rate reaches 89.77%，the leaching rate of ultrafine ground gold reaches 91.95%.
Key words: oxygen pressure leaching residue; non-cyanide system; thiourea; polysulfide; leaching; gold
