预浮选-硫代硫酸钠浸金试验研究

The study on gold leaching with preflotation-sodium thiosulfate process

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。

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%,0.10kg/t protective agent,sodium thiosulfate 10kg/t,additive concentration 0.76‰,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.