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<p>This study investigates the beneficiation of beige phosphate tailings from the Djebel Onk mining complex using both calcination and electrostatic separation techniques. Extensive mineralogical and chemical analyses were performed, including X-ray diffraction (XRD) and X-ray fluorescence (XRF). The XRD results identified the predominant phases as carbonate-fluorapatite and carbonate-hydroxyapatite, along with significant amounts of dolomite, quartz, and calcite. Chemical analysis via XRF indicated high concentrations of CaO and P<sub>2</sub>O<sub>5</sub>, with a CaO/P<sub>2</sub>O<sub>5</sub> ratio of 3.20. Calcination tests conducted at temperatures of 850 °C, 950 °C, and 1050 °C showed that the highest P<sub>2</sub>O<sub>5</sub> content (31.15%) and a CaO content of 39.14% were achieved at 1050 °C for 60&#xa0;min, with the MgO content remaining below 1.2%. Electrostatic separation tests revealed optimal conditions at a rotation speed of 75 r/min and an electric voltage of 32&#xa0;kV, achieving a phosphate content of 32.8%, MgO content of 0.86%, CaO content of 43.49%, and a recovery rate of 95.46%. The study demonstrates the potential for effective recovery and enrichment of phosphate from tailings, providing a viable solution for managing mining waste and reducing environmental impact.</p>

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Utilizing Calcination and Electrostatic Separation to Enhance Recovery and Enrichment of Phosphate Tailings

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Rim Amata,
  • Mohamed Bounouala,
  • Ashraf Alsafasfeh,
  • Amar Amata,
  • Chourouk Meniai

摘要

This study investigates the beneficiation of beige phosphate tailings from the Djebel Onk mining complex using both calcination and electrostatic separation techniques. Extensive mineralogical and chemical analyses were performed, including X-ray diffraction (XRD) and X-ray fluorescence (XRF). The XRD results identified the predominant phases as carbonate-fluorapatite and carbonate-hydroxyapatite, along with significant amounts of dolomite, quartz, and calcite. Chemical analysis via XRF indicated high concentrations of CaO and P2O5, with a CaO/P2O5 ratio of 3.20. Calcination tests conducted at temperatures of 850 °C, 950 °C, and 1050 °C showed that the highest P2O5 content (31.15%) and a CaO content of 39.14% were achieved at 1050 °C for 60 min, with the MgO content remaining below 1.2%. Electrostatic separation tests revealed optimal conditions at a rotation speed of 75 r/min and an electric voltage of 32 kV, achieving a phosphate content of 32.8%, MgO content of 0.86%, CaO content of 43.49%, and a recovery rate of 95.46%. The study demonstrates the potential for effective recovery and enrichment of phosphate from tailings, providing a viable solution for managing mining waste and reducing environmental impact.