The selective flotation separation of pyrite and chalcopyrite, and the comprehensive utilization of AMD play a vital role in the cleaner production of copper sulfide ore. In this paper, flotation separation of chalcopyrite and pyrite via Fenton oxidation modification in a low alkaline acid mine drainage (AMD) system was investigated. The results of micro-flotation experiment displayed that the maximum recovery difference between chalcopyrite and pyrite was 74.6% at recommended test conditions. The artificial mixed-mineral flotation experiment further confirmed the desirable flotation separation of minerals. Zeta potential, FTIR spectra analysis, contact angle measurement and adsorption amount analysis results confirmed that the hydrophilic species caused by Fenton oxidation could seriously hinder the interaction between pyrite surfaces and EX collector. Whereas, the Fenton oxidation had feeble influence on the floatability of chalcopyrite. The XPS study indicated that Fenton oxidation significantly increased the contents of SO₄^2- on pyrite surfaces, and the concentration of SO₄^2- increased from 5.9% to 37.65%. Meanwhile, this modification promoted the deep transformation of Fe chemical states mainly from Fe(Ⅱ)-S to Fe(III)–OOH and Fe₂(SO4)₃. As a result, the contents of Fe(III)–OOH and Fe₂(SO₄)₃ reached 50.04% and 29.19%, respectively. For chalcopyrite, a small amount of oxide/hydroxide species were formed during this processing, and the chalcopyrite can interact with EX collector effectively. Thus, flotation separation of chalcopyrite and pyrite via Fenton oxidation modification in a low alkaline AMD system mainly attributes to the significant differences in the number and species of hydrophilic species.

黄铁矿和黄铜矿的选择性浮选分离和AMD的综合利用对硫化铜矿的清洁生产起着至关重要的作用。本文研究了低碱性酸性矿山排水（AMD）系统中Fenton氧化改性浮选黄铜矿和黄铁矿的方法。微浮选实验结果表明，在推荐的试验条件下，黄铜矿和黄铁矿的最大回收率差异为74.6%。人工混合矿物浮选实验进一步证实了矿物的理想浮选分离。Zeta 电位，FTIR 光谱分析，接触角测量和吸附量分析结果证实，Fenton 氧化引起的亲水物种严重阻碍了黄铁矿表面与 EX 捕收剂的相互作用。而芬顿氧化对黄铜矿的可浮性影响不大。XPS 研究表明 Fenton 氧化显着增加了 SO 的含量₄ ^2-在黄铁矿表面，SO ₄ ^2-浓度从5.9%增加到37.65%。同时，这种改性促进了Fe化学态主要由Fe(Ⅱ)-S向Fe(III)-OOH和Fe ₂ (SO4) ₃的深度转变。结果，Fe(III)-OOH 和 Fe ₂ (SO ₄ ) _3的含量分别达到 50.04% 和 29.19%。对于黄铜矿，在此加工过程中形成了少量的氧化物/氢氧化物，黄铜矿可以有效地与 EX 捕收剂相互作用。因此，在低碱性 AMD 体系中通过 Fenton 氧化改性浮选黄铜矿和黄铁矿主要归因于亲水物种的数量和种类的显着差异。