In this study, a comprehensive hydrometallurgical processing of molybdenite (MoS) concentrate was investigated. This investigation involved a novel approach combining mechanical activation, leaching, and polyelectrolyte extraction methods. The integrated method effectively addressed the challenge of low leaching rate of molybdenite, resulting in the successful production of high-purity molybdenum trioxide. Milled molybdenite samples were analyzed by different methods of X-ray diffraction, atomic force and electron microscopy, and BET. The increasing trend of the specific surface area during milling was determined by a model fitting which was useful for optimization of milling time. Several leaching reagents were studied to achieve high molybdenum dissolution. The most promising results were achieved through a two-hour process, yielding an impressive leaching efficiency of 80% and a resulting Mo concentration of 6700 mg/L. Molybdenum recovery was efficiently carried out through polyelectrolyte extraction, as confirmed by ICP and CHNS analyses, demonstrating selective precipitation of molybdenum from the solution. The subsequent calcination of the precipitated molybdenum(VI) compound resulted in the production of high-purity molybdenum trioxide. Furthermore, a conceptual hydrometallurgical treatment process for molybdenite concentrate was proposed, aiming to recover molybdenum, sulfuric acid, and copper. This proposed process presents a promising avenue for further exploration in pilot plant studies within the molybdenum industry.

中文翻译：

---

从辉钼矿中回收MoO3的湿法冶金工艺流程


在这项研究中，研究了辉钼矿（MoS）精矿的综合湿法冶金加工。这项研究涉及一种结合机械活化、浸出和聚电解质提取方法的新方法。该集成方法有效解决了辉钼矿浸出率低的难题，成功生产了高纯三氧化钼。通过 X 射线衍射、原子力和电子显微镜以及 BET 的不同方法对研磨的辉钼矿样品进行了分析。铣削过程中比表面积的增加趋势是通过模型拟合确定的，这对于优化铣削时间非常有用。研究了几种浸出剂以实现高钼溶解。最有希望的结果是通过两个小时的过程实现的，浸出效率高达 80%，钼浓度达到 6700 mg/L。 ICP 和 CHNS 分析证实，通过聚电解质萃取有效地进行了钼回收，证明了钼从溶液中选择性沉淀。随后对沉淀的钼(VI)化合物进行煅烧，生成高纯度的三氧化钼。此外，提出了辉钼矿精矿湿法冶金处理工艺的概念，旨在回收钼、硫酸和铜。该工艺为钼行业中试工厂研究的进一步探索提供了一条有希望的途径。