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<p>The increasing generation of metallic waste from aluminum production poses not only an environmental challenge but also an opportunity for the recovery of high value-added materials. This work presents a process for obtaining alumina (Al<sub>2</sub>O<sub>3</sub>) from aluminum ingot waste and foundry slag through controlled leaching. The objective was to optimize alumina recovery by analyzing the elemental composition and crystalline structure of the final product. Aluminum residues were subjected to mechanical pretreatment followed by leaching for aluminum compound extraction. X-ray fluorescence (XRF) analysis confirmed high Al<sub>2</sub>O<sub>3</sub> content and a marked reduction of impurities originally present in the waste. X-ray diffraction (XRD) revealed the formation of α-alumina, identified by its characteristic crystallographic patterns, evidencing the effectiveness of the process in producing a stable structure of industrial relevance. These results demonstrate the potential of leaching for aluminum waste valorization, aligning with circular economy principles and enabling applications in ceramic, catalytic, and biomedical industries.</p> Graphical abstract <p></p>

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Recovery of alumina from aluminum foundry waste via leaching: Composition and structural analysis

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Castro Zúñiga Marvin Sebastian,
  • Flores Villaseñor Sergio Enrique,
  • Reyes Guzmán Claudia Verónica,
  • Esmeralda Gómez Alma Graciela

摘要

The increasing generation of metallic waste from aluminum production poses not only an environmental challenge but also an opportunity for the recovery of high value-added materials. This work presents a process for obtaining alumina (Al2O3) from aluminum ingot waste and foundry slag through controlled leaching. The objective was to optimize alumina recovery by analyzing the elemental composition and crystalline structure of the final product. Aluminum residues were subjected to mechanical pretreatment followed by leaching for aluminum compound extraction. X-ray fluorescence (XRF) analysis confirmed high Al2O3 content and a marked reduction of impurities originally present in the waste. X-ray diffraction (XRD) revealed the formation of α-alumina, identified by its characteristic crystallographic patterns, evidencing the effectiveness of the process in producing a stable structure of industrial relevance. These results demonstrate the potential of leaching for aluminum waste valorization, aligning with circular economy principles and enabling applications in ceramic, catalytic, and biomedical industries.

Graphical abstract