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Published in:
2023 | OriginalPaper | Chapter
Characterization of Low- and High Mg-Containing Aluminum White Dross Using Deterministic Image Analysis of EPMA Scans
Authors : Cathrine Kyung Won Solem, Hannes Zedel, Ragnhild E. Aune
Published in: Light Metals 2023
Publisher: Springer Nature Switzerland
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Abstract
White dross is a hazardous waste generated during the primary production of aluminum (Al) which consists of a heterogeneous mixture of different oxides and metallic Al in the form of large flakes, lumps, particles, and dust. Due to the heterogeneity of the dross, sampling is challenging. A sampling tool with step-by-step procedures for its use has previously been introduced, with recommendations for how to pulverize and analyze different fractions of the dross using X-Ray Diffraction (XRD). In the present study, Electron Probe MicroAnalysis (EPMA) scans of white dross samples collected from the holding furnace in an Al casthouse during the production of Al alloy 5182 (AlMg4.5Mn0.4) and 6016 (AlSi1.2Mg0.4) have been quantified and referenced to XRD analysis. The obtained results suggest that the image analysis method can quantitatively assess the influence of various process parameters on dross characteristics and thereby contribute to optimizing industrial furnace operations aiming to reduce dross formation.