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<p>Ferromolybdenum smelting dust, characterized by its fine grain size and complex composition, presents unclear molybdenum leaching behavior. This study systematically examines this behavior using chemical phase analysis, X-ray diffraction, and electron microscopy on dust from a specific enterprise. Leaching experiments under varying conditions were conducted, followed by microstructure characterization of the residues and leaching kinetics analysis. The findings reveal that molybdenum in the dust exists as molybdite, molybdate, and molybdenite, encased by impurities like lead molybdate. Sodium hydroxide was used to dissolve lead molybdate and molybdenum trioxide. However, some Mo(II) remained undissolved, forming copper hydroxide encapsulation that hindered leaching. Kinetic analysis indicated that diffusion and interfacial chemical reactions control the leaching process. These results offer a theoretical basis for efficiently recovering molybdenum from ferromolybdenum smelting dust.</p>

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Investigation of Molybdenum Leaching Mechanisms in Ferromolybdenum Smelting Dust

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Wei Yang,
  • Wenbin Wang,
  • Tao Long,
  • Sha Deng,
  • Hua Dong

摘要

Ferromolybdenum smelting dust, characterized by its fine grain size and complex composition, presents unclear molybdenum leaching behavior. This study systematically examines this behavior using chemical phase analysis, X-ray diffraction, and electron microscopy on dust from a specific enterprise. Leaching experiments under varying conditions were conducted, followed by microstructure characterization of the residues and leaching kinetics analysis. The findings reveal that molybdenum in the dust exists as molybdite, molybdate, and molybdenite, encased by impurities like lead molybdate. Sodium hydroxide was used to dissolve lead molybdate and molybdenum trioxide. However, some Mo(II) remained undissolved, forming copper hydroxide encapsulation that hindered leaching. Kinetic analysis indicated that diffusion and interfacial chemical reactions control the leaching process. These results offer a theoretical basis for efficiently recovering molybdenum from ferromolybdenum smelting dust.