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A novel process for treating copper concentratesCopper concentrate is currently being scaled up at the UniversityUniversities of Concepción, involving an air-roastingRoasting step followed by hydrogen reductionHydrogen reduction of the calcines and subsequent separation to recover contained metalsMetal. This process enables the recoveryRecovery of not only copperCopper and sulfurSulfur (in the form of acid) but also ironIron and molybdenum as magnetite concentrateConcentrate and molybdenum salt, respectively—both of which are typically lost to slagSlag in conventional smeltingSmelting and converting technologiesTechnology. This work presents the results and optimizationOptimization of a flowsheet developed at a pilot scale, processingProcessing 250–300 kg/day of concentrateConcentrate. Various alternatives for CAPEXCapex and OPEXOPEX were evaluated, demonstrating that this technologyTechnology is competitive with existing methods. Opportunities for value chain optimizationOptimization are explored, particularly in upstream processes. The ability to treat low-Cu, high-Fe concentratesConcentrate transforms ironIron, traditionally an environmental liability in slagsSlag, into sustainable magnetite for the ironIron and steel industry.

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Oxidation–Reduction Process for Copper Concentrates: An Alternative to Smelting–Converting

  • 会议论文

  • 发表日期：

    2025年

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  • Igor Wilkomirksy,
  • Marcela Angulo,
  • Roberto Parra,
  • Fernando Parada,
  • Hugo Rojas,
  • Gonzalo Reyes,
  • Maximiliano Roa,
  • Camila Mora

摘要

A novel process for treating copper concentratesCopper concentrate is currently being scaled up at the UniversityUniversities of Concepción, involving an air-roastingRoasting step followed by hydrogen reductionHydrogen reduction of the calcines and subsequent separation to recover contained metalsMetal. This process enables the recoveryRecovery of not only copperCopper and sulfurSulfur (in the form of acid) but also ironIron and molybdenum as magnetite concentrateConcentrate and molybdenum salt, respectively—both of which are typically lost to slagSlag in conventional smeltingSmelting and converting technologiesTechnology. This work presents the results and optimizationOptimization of a flowsheet developed at a pilot scale, processingProcessing 250–300 kg/day of concentrateConcentrate. Various alternatives for CAPEXCapex and OPEXOPEX were evaluated, demonstrating that this technologyTechnology is competitive with existing methods. Opportunities for value chain optimizationOptimization are explored, particularly in upstream processes. The ability to treat low-Cu, high-Fe concentratesConcentrate transforms ironIron, traditionally an environmental liability in slagsSlag, into sustainable magnetite for the ironIron and steel industry.