The mechanism of oxygen pressure acid leaching of sphalerite catalyzed by Fe³⁺/Fe²⁺ self-precipitation was investigated in this study. Artificial sphalerite was fabricated with varying amounts of iron content via the sintering of ZnS and FeS and used for the pressure acid leaching experiment. The variations in the potential of the pressure leaching system were investigated by using a self-designed potential autoclave. The results showed that compared to the non-iron sphalerite, there was a violent redox reaction between the 25.70% Fe-artificial sphalerite and dissolved oxygen during the process of pressure leaching; and the catalytic mechanism was attributed to the redox couple Fe³⁺/Fe²⁺, where Fe³⁺oxidizes the H2S gas film and the reduced Fe²⁺ state is subsequently oxidized by the dissolved oxygen. Furthermore, the effect of temperature, H₂SO₄ concentration, and oxygen partial pressure on the artificial sphalerite with different iron contents was studied. The sphalerite samples with iron content were observed to dissolve more easily in sulfuric acid compared to the non-iron samples. Moreover, the activation energy of artificial sphalerite was observed to be lower in the sample with 25.70% iron content (22.26 kJ/mol) compared to that with no iron (32.31 kJ/mol); and the apparent reaction orders were obtained with respect to H₂SO₄ concentration (1.10 and 1.36) and oxygen partial pressure (1.29 and 1.41), respectively. A comprehensive kinetic model was developed on the basis of the experimental data and the fitted leaching ratio plot; and the kinetic equations for the leaching of sphalerite catalyzed by Fe³⁺/Fe²⁺ self-precipitation were determined.

研究了Fe ³⁺ / Fe ²⁺自沉淀催化闪锌矿氧压酸浸的机理。通过ZnS和FeS的烧结制备了具有不同铁含量的人造闪锌矿，并将其用于加压酸浸实验。通过使用自行设计的高压釜，研究了压力浸出系统的电势变化。结果表明，与非铁闪锌矿相比，压力浸出过程中25.70％的铁人造闪锌矿与溶解氧之间发生剧烈的氧化还原反应。催化机理归因于氧化还原对Fe ³⁺ / Fe ²⁺，其中Fe ³⁺氧化H2S气膜，然后还原的Fe ²⁺态被溶解的氧氧化。此外，研究了温度，H ₂ SO ₄浓度和氧分压对不同铁含量的人造闪锌矿的影响。与非铁样品相比，观察到含铁的闪锌矿样品更容易溶于硫酸。此外，在铁含量为25.70％（22.26 kJ / mol）的样品中，人工闪锌矿的活化能较低，而铁含量为32.31 kJ / mol的样品则较低。得到了关于H ₂ SO ₄的表观反应阶数浓度（1.10和1.36）和氧分压（1.29和1.41）。根据实验数据和拟合的浸出率图，建立了一个综合的动力学模型。并建立了Fe ³⁺ / Fe ²⁺自沉淀催化闪锌矿浸出的动力学方程。