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Using fuels that produce low greenhouse gas emissionsGas emissions in heavy industriesIndustry is a promising method to reduce their carbon footprintCarbon footprint, and hence an effective method in combating global warming. Hydrocarbon-based fuels are commonly used in metalMetals melting furnacesMelting furnace utilizing air- or oxy-fuelOxy-fuel burners. It is critical to understand the effect of using low-carbonCarbon fuels (hydrogenHydrogen) on the melting process and the quality or properties of the melt. In this study, experiments are conducted using a test furnaceFurnace equipped with burner technology for various fuel combinations. This test furnaceFurnace allows for a more focused study to identify how a change in the furnaceFurnace atmosphere impacts the aluminumAluminum melt and dross formation. X-ray diffraction (XRD) and Scanning Electron MicroscopyElectron microscopy/Energy-Dispersive X-ray SpectroscopySpectroscopy (SEM/EDS) analyses of the slag layer and the core metalMetals were conducted to evaluate the effect of using oxy-hydrogen combustionHydrogen combustion on the melting process. The results were compared against baseline oxy-natural gas combustion, under similar furnaceFurnace heat-up ramp rate and melting period. The results show that elevated water vapor concentration and the absence of carbonCarbon dioxide in the furnaceFurnace atmosphere when using hydrogenHydrogen as fuel didn’t impact the total oxide formation significantly during the melting process as compared to natural gas combustion. XRD analysis of the slag layer shows similar oxides in the melt from both hydrogenHydrogen and natural gas combustion, while the hydrogen combustionHydrogen combustion melt showed presence of Al2O3.

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Oxy-Fuel Combustion: Impact of Hydrogen Combustion on Aluminum Melt Quality in Secondary Melting Processes

  • 会议论文

  • 发表日期：

    2024年

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  • Pooyan Kheirkhah,
  • Valmiro Sa,
  • Anandkumar Makwana

摘要

Using fuels that produce low greenhouse gas emissionsGas emissions in heavy industriesIndustry is a promising method to reduce their carbon footprintCarbon footprint, and hence an effective method in combating global warming. Hydrocarbon-based fuels are commonly used in metalMetals melting furnacesMelting furnace utilizing air- or oxy-fuelOxy-fuel burners. It is critical to understand the effect of using low-carbonCarbon fuels (hydrogenHydrogen) on the melting process and the quality or properties of the melt. In this study, experiments are conducted using a test furnaceFurnace equipped with burner technology for various fuel combinations. This test furnaceFurnace allows for a more focused study to identify how a change in the furnaceFurnace atmosphere impacts the aluminumAluminum melt and dross formation. X-ray diffraction (XRD) and Scanning Electron MicroscopyElectron microscopy/Energy-Dispersive X-ray SpectroscopySpectroscopy (SEM/EDS) analyses of the slag layer and the core metalMetals were conducted to evaluate the effect of using oxy-hydrogen combustionHydrogen combustion on the melting process. The results were compared against baseline oxy-natural gas combustion, under similar furnaceFurnace heat-up ramp rate and melting period. The results show that elevated water vapor concentration and the absence of carbonCarbon dioxide in the furnaceFurnace atmosphere when using hydrogenHydrogen as fuel didn’t impact the total oxide formation significantly during the melting process as compared to natural gas combustion. XRD analysis of the slag layer shows similar oxides in the melt from both hydrogenHydrogen and natural gas combustion, while the hydrogen combustionHydrogen combustion melt showed presence of Al2O3.