880 工程科学学报，第43卷，第7期 浸金试剂，但无论是在酸性还是碱性体系中，硫脲 refractory gold concentrate with a two-stage chemical-biological 都不太稳定；在pH值大于2的酸性体系或温度大 approach.Hydrometallurgy,2020,197:105421 于25℃时易分解，导致硫脲消耗高，需要进一步 [11]Wang J,Wang W,Dong K W,et al.Research on leaching of carbonaceous gold ore with copper-ammonia-thiosulfate solutions. 研究硫脲的稳定性，防止二硫甲脒的分解，控制氧 Miner Eng,2019,137:232 化还原电位值，防止硫脲的过度氧化.生物氧化和 [12]Liu X L,Jiang T,Xu B,et al.Thiosulphate leaching of gold in the 两步硫脲浸出工艺药剂消耗低，浸出液中和无需 Cu-NH-S202--H2O system:An updated thermodynamic analy- 额外成本，且环境友好，因此，将两步硫脲法与生 sis using predominance area and species distribution diagrams. 物氧化法相结合是一种值得进一步研究甚至应用 Miner Eng,.2020,151:106336 于工业的方法 [13]Liu X L,Xu B,Yang Y B,et al.Effect of galena on thiosulfate (5)二甲基亚砜是一种非质子极性溶剂，用含 leaching of gold.Hydrometallurgy,2017,171:157 CBr,的二甲基亚砜溶液浸金，浸出液可重复使用 [14]Yang Y B,Gao W,Xu B,et al.Study on oxygen pressure 且浸金过程中不产生化学污泥.因此，中小型企业 thiosulfate leaching of gold without the catalysis of copper and ammonia.Hydrometallurgy,2019,187:71 可采用此工艺从二次资源中回收金. 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