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<p>Process mineralogy studies provide critical guidance for selecting and optimizing vanadium extraction technologies from vanadium shale, as variations in the process mineralogy characteristics of these ores require distinct processing strategies. In this study, a comparative analysis of the process mineralogy parameters among vanadium shale, roasted product, and leaching residue was conducted. The mineral composition, particle size distribution, vanadium migration behavior, micromorphology, liberation, and intergrowth relationships of the vanadium (V)-bearing minerals (muscovite, sericite, and limonite) and the primary gangue mineral (quartz) were systematically characterized. Roasting was found to primarily enhance vanadium leaching by reducing particle size and increasing liberation. Comparative analysis of mineral composition and vanadium distribution before and after leaching revealed leaching contributions of 68.95%, 25.74%, and 5.31% for muscovite, sericite, and limonite, respectively. Detailed characterization of residual V-bearing minerals in leaching residue showed that residual sericite particles were larger and more liberated, while muscovite and limonite remained fine-grained with complex intergrowth. These findings offer theoretical support for optimizing vanadium leaching from this ore and provide insights applicable to similar V-bearing ores.</p>

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Transformation of Distribution Characteristics of V-Bearing Minerals in Vanadium Shale During Roasting-Leaching Process by Process Mineralogy

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Zhe Bai,
  • Yuangan Chen,
  • Jianping Jin,
  • Yongsheng Sun,
  • Yuexin Han,
  • Zhenya Zhou

摘要

Process mineralogy studies provide critical guidance for selecting and optimizing vanadium extraction technologies from vanadium shale, as variations in the process mineralogy characteristics of these ores require distinct processing strategies. In this study, a comparative analysis of the process mineralogy parameters among vanadium shale, roasted product, and leaching residue was conducted. The mineral composition, particle size distribution, vanadium migration behavior, micromorphology, liberation, and intergrowth relationships of the vanadium (V)-bearing minerals (muscovite, sericite, and limonite) and the primary gangue mineral (quartz) were systematically characterized. Roasting was found to primarily enhance vanadium leaching by reducing particle size and increasing liberation. Comparative analysis of mineral composition and vanadium distribution before and after leaching revealed leaching contributions of 68.95%, 25.74%, and 5.31% for muscovite, sericite, and limonite, respectively. Detailed characterization of residual V-bearing minerals in leaching residue showed that residual sericite particles were larger and more liberated, while muscovite and limonite remained fine-grained with complex intergrowth. These findings offer theoretical support for optimizing vanadium leaching from this ore and provide insights applicable to similar V-bearing ores.