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The demand for niobium has continued to grow in high-end manufacturingManufacturing, alloys, and aerospace fields in recent years. However, many complex niobium resourcesNiobium resources, such as the Bonga deposit in Angola, the Ghurayyah deposit in Saudi Arabia, and Bayan Obo in China, remain underutilized. How to achieve the extractionExtraction and utilization of complex niobium resources is a major issue that must be addressed for current and future development. Here, a high-temperature reduction-sulfurationSulfuration strategy was proposed for transforming and separating niobium from complex Bayan Obo symbiotic ore resources. After the reduction-sulfuration process, niobium-bearing minerals were converted into niobium-bearing sulfide, which was naturally separated from slag. And the high recoveryRecovery rate of Nb reaches 93.8%. The separation process of niobium is similar to that of chalcophile metals through matte separation, but the transformation mechanisms differ fundamentally. Besides, the effects of temperature on niobium recoveryRecovery were discussed in this study. This strategy offers an effective solution for the development of niobium resourcesNiobium resources.

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Recycling Niobium from Complex Resources by High-Temperature Reduction-Sulfuration Strategy

  • 会议论文

  • 发表日期：

    2026年

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  • Wensheng Han,
  • Xiang Lu,
  • Wen Chen,
  • Mengjie Ran

摘要

The demand for niobium has continued to grow in high-end manufacturingManufacturing, alloys, and aerospace fields in recent years. However, many complex niobium resourcesNiobium resources, such as the Bonga deposit in Angola, the Ghurayyah deposit in Saudi Arabia, and Bayan Obo in China, remain underutilized. How to achieve the extractionExtraction and utilization of complex niobium resources is a major issue that must be addressed for current and future development. Here, a high-temperature reduction-sulfurationSulfuration strategy was proposed for transforming and separating niobium from complex Bayan Obo symbiotic ore resources. After the reduction-sulfuration process, niobium-bearing minerals were converted into niobium-bearing sulfide, which was naturally separated from slag. And the high recoveryRecovery rate of Nb reaches 93.8%. The separation process of niobium is similar to that of chalcophile metals through matte separation, but the transformation mechanisms differ fundamentally. Besides, the effects of temperature on niobium recoveryRecovery were discussed in this study. This strategy offers an effective solution for the development of niobium resourcesNiobium resources.