Oxidation will affect the flotation of sulfide ore, but both sulfide ore and xanthate are easily oxidized, the role of oxidation in the flotation separation of sulfide ore is still unclear. In this study, different single mineral flotation tests were designed to explore the role of hydrogen peroxide (H₂O₂) in the flotation separation of chalcopyrite and sphalerite, and artificial mixed minerals tests was conducted to verify the selective depression effect of H₂O₂. Ultraviolet–visible (UV–vis) spectrometer, inductively coupled plasma-mass spectrometry (ICP-MS) measurement, microcalorimetry measurement, contact angle measurement, and Fourier transform infrared (FTIR) spectrometer were used to discuss the depressive mechanism of H₂O₂ on sphalerite. Flotation tests with different dosing methods show that mineral self-oxidation is the main reason for its depression. Both the chalcopyrite and sphalerite can be oxidized by H₂O₂, and the PBX adsorbed on its surfaces can also be desorbed by H₂O₂. However, sphalerite is easier to oxidize than chalcopyrite, and the PBX adsorbed on the surface of sphalerite is also easier to be desorbed. Therefore, sphalerite is selectively depressed by H₂O₂ in the flotation of chalcopyrite in the order of “mineral + PBX + H₂O₂″.

氧化会影响硫化矿的浮选，但硫化矿和黄药都容易被氧化，氧化在硫化矿浮选分离中的作用尚不清楚。本研究设计了不同的单一矿物浮选试验，探讨过氧化氢（H ₂ O _{2 ）在黄铜矿和闪锌矿浮选分离中的作用，并通过人工混合矿物试验验证了H 2} O的选择性抑制作用。₂ . 使用紫外-可见 (UV-vis) 光谱仪、电感耦合等离子体质谱 (ICP-MS) 测量、微量热法测量、接触角测量和傅里叶变换红外 (FTIR) 光谱仪来讨论 H 的抑制机制_{闪锌矿上的2} O ₂。不同投加方式的浮选试验表明，矿物自氧化是其抑制的主要原因。黄铜矿和闪锌矿都可以被H ₂ O ₂氧化，吸附在其表面的PBX也可以被H ₂ O ₂解吸。但闪锌矿比黄铜矿更容易氧化，吸附在闪锌矿表面的PBX也更容易解吸。因此，闪锌矿在黄铜矿浮选中被H ₂ O ₂选择性抑制，顺序为“矿物+PBX+H ₂ O ₂ ”。