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<p>Recoverable reserves of high-grade metal ores have gradually become depleted because of mining and consumption of good-quality deposits, making efficient process design urgent. Physicochemical froth flotation was employed in this study to separate valuable contents. Complex polymetallic Mo-Pb-Fe-REO (rare earth oxides) ore was used to design an optimum technological process by flotation. Optical microscope and SEM analyses were initially operated to analyze the ore properties. Relevant reagents and flotation stages were determined. Finally, preferential mixed flotation was conducted to simultaneously harvest Mo-Pb minerals and then separate them using the Pb depressant P-Nokes. The optimized process yielded Mo and Pb concentrates with grades of 49.60% and 54.98% and recovery rates of 85.44% and 85.83%, respectively; the REO concentrate achieved a grade of 14.75% with a recovery rate of 24.48%. Pyrite, magnetite, and REO beneficiation were disassociated by combined flotation and magnetic separation methods, respectively. The quantity-quality flowsheet of the whole closed-circuit process was calculated to interpret the recovery and grade data of every product for each procedure. So far, almost all contents have been separated and recycled successively, reducing the risks of tailing stacked dams, thereby achieving cleaner production and contributing to environmental protection.</p>

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Comprehensive Recovery of the Complex Polymetallic Ore by Efficient Flotation Technological Processes

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Ya Gao,
  • Jinhui Li,
  • Heqiao Wang,
  • Weifan Gao,
  • Wenhe Wu

摘要

Recoverable reserves of high-grade metal ores have gradually become depleted because of mining and consumption of good-quality deposits, making efficient process design urgent. Physicochemical froth flotation was employed in this study to separate valuable contents. Complex polymetallic Mo-Pb-Fe-REO (rare earth oxides) ore was used to design an optimum technological process by flotation. Optical microscope and SEM analyses were initially operated to analyze the ore properties. Relevant reagents and flotation stages were determined. Finally, preferential mixed flotation was conducted to simultaneously harvest Mo-Pb minerals and then separate them using the Pb depressant P-Nokes. The optimized process yielded Mo and Pb concentrates with grades of 49.60% and 54.98% and recovery rates of 85.44% and 85.83%, respectively; the REO concentrate achieved a grade of 14.75% with a recovery rate of 24.48%. Pyrite, magnetite, and REO beneficiation were disassociated by combined flotation and magnetic separation methods, respectively. The quantity-quality flowsheet of the whole closed-circuit process was calculated to interpret the recovery and grade data of every product for each procedure. So far, almost all contents have been separated and recycled successively, reducing the risks of tailing stacked dams, thereby achieving cleaner production and contributing to environmental protection.