Based on the analysis of ore ore properties, the author studied the gold leaching using preflotation-sodium thiosulfate flowsheet. Flotation reagents for sodium silicate, sodium sulfide, butyl xanthate,pine oil were 1800g/t,40g/t,80g/t,24g/t with one roughing and one scavenging. With preleaching (4h)-leaching (24 h)-five times washing process, normal temperature and pressure, slurry concentration 33% ,0. l0kg/t protective agent,sodium thiosulfate l0kg/t,additive concentration 0. 76%o>ammonia 1. 27%, lime 2kg/t,the final recovery rate of gold was more than 86%. This method was not only small toxicity, green environmental protection, but also provided technology feasible, economically reasonable process and conditions for the gold pilot recovery.%通过对某矿原矿矿石性质的分析,采用预浮选—硫代硫酸盐法进行浸金工艺试验研究.浮选采用一粗一精浮选流程,药剂用量为硅酸钠1800g/t,硫化钠40g/t,丁基黄药80g/t,松油24g/t.浸出采用预浸(4h)-浸出(24h)-五次洗涤流程,常温常压、矿浆浓度33％、保护剂0.10kg/t、硫代硫酸钠10kg/t、助剂浓度0.76‰、氨水1.27％、石灰用量2kg/t,最终金浸出率达到86％以上.采用该法不仅毒性小,绿色环保,而且为金的中试回收提供了技术可行、经济合理的工艺流程和条件.
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