The application of Fe³⁺ and NH₄⁺ in the flotation separation of chalcopyrite and arsenopyrite were investigated by micro-flotation tests, infrared spectroscopy, local electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy, Time-of-flight secondary ion mass spectrometry, surface adsorption experiments and inductively coupled plasma mass spectrometry. Finally, it mainly explained the interaction mechanism of Fe³⁺ and NH₄⁺ on chalcopyrite surface. The micro-flotation tests showed that the combined use of Fe³⁺ and NH₄⁺ can not only inhibit arsenopyrite but also activate chalcopyrite. The action of Fe³⁺ on the surface of the two minerals leads to a deeper oxidation of the mineral surface, and hydrophilic compounds are produced on the mineral surface to inhibit flotation. The X-ray photoelectron spectroscopy and surface adsorption experiments showed that after addition of NH₄⁺, the hydrophilic compounds on chalcopyrite surface treated with Fe³⁺ did not decrease, but the adsorption of xanthate significantly increased. The inductively coupled plasma mass spectrometry showed that ammonium chloride can react with the copper sites on the surface of chalcopyrite, causing a small amount of copper to dissolve. It is speculated that the mechanism is that it reacts with Cu sites on the surface of chalcopyrite under the action of dissolved oxygen after the addition of ammonium chloride. The dissolved Cu²⁺ on the mineral surface forms a relatively stable ammoniacal copper complex ion (Cu (NH₃) _n²⁺) with ammonium. These ammoniacal copper complex ions undergo redox reactions with xanthate, which capture the electrons in the copper ammonium complex and Cu (I) to produce cuprous xanthate and dixanthogen. Cuprous xanthate precipitates and adsorbs on the surface of the mineral, while the dixanthogen physically adsorbs around the cuprous xanthate.

通过微浮选试验，红外光谱，局部电化学阻抗谱，X射线光电子能谱，飞行时间二次离子质谱法研究了Fe ³⁺和NH ₄ ⁺在黄铜矿和毒砂的浮选中的应用，表面吸附实验和电感耦合等离子体质谱。最后，主要解释了黄铜矿表面Fe ³⁺和NH ₄ ⁺的相互作用机理。微浮选试验表明，Fe ³⁺和NH ₄ ⁺的联合使用不仅可以抑制毒砂，还可以活化黄铜矿。Fe ^3+的作用两种矿物的表面上的硫会导致矿物表面更深的氧化，并且在矿物表面上会产生亲水性化合物以抑制浮选。X射线光电子能谱和表面吸附实验表明，加入NH ₄ ^+后，经Fe ³⁺处理的黄铜矿表面亲水性化合物没有减少，但黄药的吸附量显着增加。电感耦合等离子体质谱法表明，氯化铵可与黄铜矿表面的铜位反应，导致少量的铜溶解。推测其机理是在添加氯化铵后，在溶解氧的作用下，其与黄铜矿表面的Cu位发生反应。矿物表面上溶解的Cu ²⁺形成相对稳定的氨铜络合物离子（Cu（NH ₃）_n ²⁺）与铵。这些氨性铜络合物离子与黄药发生氧化还原反应，从而捕获铜铵络合物和Cu（I）中的电子，从而生成黄药酸亚铜和二黄原酸。黄药酸亚铜沉淀并吸附在矿物表面上，而黄原酸物理吸附在黄药酸亚铜周围。