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<p>The efficient recovery of valuable minerals from tailings and the optimization of resource utilization are critical challenges in sustainable mineral processing. This study presents an advanced tailings re-beneficiation strategy integrating jet pre-mineralization technology to enhance copper recovery. A comprehensive investigation combining experimental studies, computational fluid dynamics (CFD) simulations, and bubble dynamics analysis was conducted to elucidate the effects of jet pressure (0.2–0.4&#xa0;MPa) on turbulence intensity, bubble size distribution, and flotation kinetics within a pre-mineralization reactor. As jet pressure increased from 0.2&#xa0;MPa to 0.4&#xa0;MPa, turbulence intensity and gas-liquid phase velocity significantly increased, leading to a progressive reduction in bubble size. At the optimal jet pressure of 0.2&#xa0;MPa, flotation tests on fresh tailings achieved a concentrate grade of 1.72% Cu with a recovery of 21.18%. Fresh tailings and reprocessed concentrates were characterized using the BGRIMM Process Mineralogy Analyzing System (BPMA). The results indicate that copper minerals in fresh tailings primarily exist as poorly liberated composite particles, mainly associated with quartz, feldspar, mica, and dolomite. Copper was predominantly enriched in the + 0.1&#xa0;mm and − 0.025&#xa0;mm size fractions. In the reprocessed concentrate, copper minerals were mainly present in the fine fraction (− 0.025&#xa0;mm), accounting for 53.05% by mass, and remained insufficiently liberated, forming complex intergrowths with feldspar, mica, quartz, and rutile. By optimizing grinding fineness and employing a “one roughing, three cleaning, two scavenging” closed-circuit flotation process, a final copper concentrate with a grade of 23.73% Cu and a recovery of 94.04% was achieved. The proposed jet-assisted pre-mineralization flotation process effectively reduces fine-grained copper losses in tailings, offering theoretical guidance for efficient copper recovery and a novel flotation strategy applicable to other mineral systems.</p>

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Fine Copper Recovery From Tailings Via Jet-Assisted Pre-Mineralization

  • 期刊论文

  • 发表日期：

    2026年3月20日

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  • Yongliang Jiang,
  • Xiaojin Wen,
  • Peilong Wang,
  • Shuofu Li,
  • Shuai Qin,
  • Xizhen Yuan,
  • Chunbao Sun,
  • Jue Kou

摘要

The efficient recovery of valuable minerals from tailings and the optimization of resource utilization are critical challenges in sustainable mineral processing. This study presents an advanced tailings re-beneficiation strategy integrating jet pre-mineralization technology to enhance copper recovery. A comprehensive investigation combining experimental studies, computational fluid dynamics (CFD) simulations, and bubble dynamics analysis was conducted to elucidate the effects of jet pressure (0.2–0.4 MPa) on turbulence intensity, bubble size distribution, and flotation kinetics within a pre-mineralization reactor. As jet pressure increased from 0.2 MPa to 0.4 MPa, turbulence intensity and gas-liquid phase velocity significantly increased, leading to a progressive reduction in bubble size. At the optimal jet pressure of 0.2 MPa, flotation tests on fresh tailings achieved a concentrate grade of 1.72% Cu with a recovery of 21.18%. Fresh tailings and reprocessed concentrates were characterized using the BGRIMM Process Mineralogy Analyzing System (BPMA). The results indicate that copper minerals in fresh tailings primarily exist as poorly liberated composite particles, mainly associated with quartz, feldspar, mica, and dolomite. Copper was predominantly enriched in the + 0.1 mm and − 0.025 mm size fractions. In the reprocessed concentrate, copper minerals were mainly present in the fine fraction (− 0.025 mm), accounting for 53.05% by mass, and remained insufficiently liberated, forming complex intergrowths with feldspar, mica, quartz, and rutile. By optimizing grinding fineness and employing a “one roughing, three cleaning, two scavenging” closed-circuit flotation process, a final copper concentrate with a grade of 23.73% Cu and a recovery of 94.04% was achieved. The proposed jet-assisted pre-mineralization flotation process effectively reduces fine-grained copper losses in tailings, offering theoretical guidance for efficient copper recovery and a novel flotation strategy applicable to other mineral systems.