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<p>This study investigated the spatiotemporal evolution of acid in-situ leaching (ISL) in the Bayan Ula uranium deposit’s C12 mining area. Tracer tests and anorthite dissolution analysis revealed progressive ore-layer clogging, reducing dispersion, most notably along the KZ15262 → KC15060 pathway. Anorthite dissolution generally decreased due to passivation but increased downstream owing to prolonged contact time. A dynamic "dissolution–precipitation–clogging–dispersion weakening" coupling mechanism was identified, with dissolution dominating near injection wells and precipitation-induced clogging prevailing farther away. These processes impaired leaching solution migration, ultimately lowering uranium recovery. The findings highlight the critical role of spatiotemporal dynamics in optimizing ISL efficiency.</p>

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Spatiotemporal evolution characteristics of leaching solution dispersion and mineral dissolution in acid ISL of uranium

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Xuefeng Liu,
  • Jinhui Liu,
  • Yongguo Xing,
  • Yihan Yang,
  • Ruyi Wang

摘要

This study investigated the spatiotemporal evolution of acid in-situ leaching (ISL) in the Bayan Ula uranium deposit’s C12 mining area. Tracer tests and anorthite dissolution analysis revealed progressive ore-layer clogging, reducing dispersion, most notably along the KZ15262 → KC15060 pathway. Anorthite dissolution generally decreased due to passivation but increased downstream owing to prolonged contact time. A dynamic "dissolution–precipitation–clogging–dispersion weakening" coupling mechanism was identified, with dissolution dominating near injection wells and precipitation-induced clogging prevailing farther away. These processes impaired leaching solution migration, ultimately lowering uranium recovery. The findings highlight the critical role of spatiotemporal dynamics in optimizing ISL efficiency.