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This study employs microwaveMicrowave calcination technology to prepare molybdenum trioxideMolybdenum trioxide (MoO₃) from complex molybdenum concentratesComplex molybdenum concentrate. Analysis of the temperatureTemperature rise trend during microwaveMicrowave oxidationOxidation calcination and high-temperatureTemperature dielectric properties reveals the interaction mechanismInteraction mechanism between complex molybdenum concentratesComplex molybdenum concentrate and their primary components under microwaveMicrowave fields. The effects of calcination temperatureTemperature, soaking time, and feed quantity on MoO₃ crystallization rate were investigated. Results indicate that the highest MoO₃ crystallization rate occurs at 30 g feed quantity under identical conditions of 650 °C calcination temperatureTemperature and 80 min soaking time. Kinetics analysis indicates that the oxidationOxidation reaction of complex molybdenum concentrateComplex molybdenum concentrate under microwave irradiationMicrowave irradiation occurs in two stages, governed by external diffusion and interfacial chemical reactions (contraction sphere model), respectively. The apparent activation energies for these stages are 0.80 kJ/mol and 0.65 kJ/mol, representing a significant reduction compared to conventional oxidation roastingOxidation roasting of complex molybdenum concentrateComplex molybdenum concentrate.

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Interaction Mechanisms and Kinetic Characteristics of Microwave Calcination for Preparing Molybdenum Trioxide from Complex Molybdenum Concentrates

  • 会议论文

  • 发表日期：

    2026年

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  • Tang Yunxi,
  • Liu Chenhui,
  • Zhang Fengjuan,
  • Zhou Pan,
  • Li Yumei

摘要

This study employs microwaveMicrowave calcination technology to prepare molybdenum trioxideMolybdenum trioxide (MoO₃) from complex molybdenum concentratesComplex molybdenum concentrate. Analysis of the temperatureTemperature rise trend during microwaveMicrowave oxidationOxidation calcination and high-temperatureTemperature dielectric properties reveals the interaction mechanismInteraction mechanism between complex molybdenum concentratesComplex molybdenum concentrate and their primary components under microwaveMicrowave fields. The effects of calcination temperatureTemperature, soaking time, and feed quantity on MoO₃ crystallization rate were investigated. Results indicate that the highest MoO₃ crystallization rate occurs at 30 g feed quantity under identical conditions of 650 °C calcination temperatureTemperature and 80 min soaking time. Kinetics analysis indicates that the oxidationOxidation reaction of complex molybdenum concentrateComplex molybdenum concentrate under microwave irradiationMicrowave irradiation occurs in two stages, governed by external diffusion and interfacial chemical reactions (contraction sphere model), respectively. The apparent activation energies for these stages are 0.80 kJ/mol and 0.65 kJ/mol, representing a significant reduction compared to conventional oxidation roastingOxidation roasting of complex molybdenum concentrateComplex molybdenum concentrate.