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<p>Rare earth elements (REEs) are essential to various high-tech applications, including electronics, renewable energy technologies, and advanced defense systems. However, sustainability and efficiently recovering REEs from low-grade ores remain a significant challenge. This study focuses on the efficient separation of monazite, a REEs-bearing mineral, from zircon, utilizing magnetic separation and flotation techniques. Monazite, a paramagnetic mineral, was identified in notable concentration (1.22% REOs) within a feed zircon-rich sample containing 57.90% ZrO<sub>2</sub>. The magnetic separation was performed using Carpco induced roll magnetic separator, resulting in a paramagnetic monazite pre-concentrate of 12.50% REOs with a high recovery of 96.82%. Simultaneously, zircon was upgraded in the non-magnetic fraction, achieving a ZrO<sub>2</sub> content of 61.04% with a recovery exceeding 95%. The monazite rich-fraction was further processed through flotation, employing sodium N-Lauroylsarcosinate (SNLS) as a novel collector and compared to oleic acid. Optimized flotation conditions with SNLS produced a monazite-rich concentrate containing 33.06% REOs and a recovery of 75.16%. Many analytical techniques, including XRD, XRF, FTIR, ICP-OES, SEM, EDS, and photomicrograph were utilized to evaluate the separation efficiency. This work demonstrates the potential of SNLS as a novel collector, presenting a promising pathway for enhancing REEs recovery.</p>

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Efficient separation of rare earths-bearing monazite from zircon via combined magnetic separation and flotation using sodium N-Lauroylsarcosinate (SNLS) as a promising collector

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • El-Sayed R. E. Hassan,
  • F. Mutelet,
  • M. M. Abdel-Halim,
  • M. M. M. Ahmed,
  • A. M. Elbendari,
  • Yun Chen

摘要

Rare earth elements (REEs) are essential to various high-tech applications, including electronics, renewable energy technologies, and advanced defense systems. However, sustainability and efficiently recovering REEs from low-grade ores remain a significant challenge. This study focuses on the efficient separation of monazite, a REEs-bearing mineral, from zircon, utilizing magnetic separation and flotation techniques. Monazite, a paramagnetic mineral, was identified in notable concentration (1.22% REOs) within a feed zircon-rich sample containing 57.90% ZrO2. The magnetic separation was performed using Carpco induced roll magnetic separator, resulting in a paramagnetic monazite pre-concentrate of 12.50% REOs with a high recovery of 96.82%. Simultaneously, zircon was upgraded in the non-magnetic fraction, achieving a ZrO2 content of 61.04% with a recovery exceeding 95%. The monazite rich-fraction was further processed through flotation, employing sodium N-Lauroylsarcosinate (SNLS) as a novel collector and compared to oleic acid. Optimized flotation conditions with SNLS produced a monazite-rich concentrate containing 33.06% REOs and a recovery of 75.16%. Many analytical techniques, including XRD, XRF, FTIR, ICP-OES, SEM, EDS, and photomicrograph were utilized to evaluate the separation efficiency. This work demonstrates the potential of SNLS as a novel collector, presenting a promising pathway for enhancing REEs recovery.