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The strong incentives to increase the total share of recycled aluminiumAluminium in new products create challenges in the remelting chain to maintain control of alloying elements in the final products. Efficient and improved sorting of scrapScrap has enabled good utilization of scrapScrap from various sources; however, the sorting also yields a significant stream of scrapScrap with alloy contents not suitable for remelting. Today this scrapScrap is discarded, but it should rather be purified and used in remelting. The principles of the Hoopes cell for producing high-purity aluminiumAluminium was adapted in a laboratory cell with completely new geometry and optimized for high throughput and a purity like primary aluminiumAluminium metal. 99.5% pure Al was achieved from highly alloyed scrapScrap sources with less than 5 kWh/kg energyEnergy usage and no CO2CO2 emissionsEmissions. The process can remove any alloying elements.

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Electrorefining of Highly Alloyed Aluminium Scrap to Obtain Primary Metal Quality

  • 会议论文

  • 发表日期：

    2026年

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  • Ole Kjos,
  • Camilla Sommerseth,
  • Cathrine K. W. Solem,
  • Asbjørn Solheim,
  • Debora Foppiano,
  • Einar Jonsson,
  • Zhaohui Wang,
  • Henrik Gudbrandsen

摘要

The strong incentives to increase the total share of recycled aluminiumAluminium in new products create challenges in the remelting chain to maintain control of alloying elements in the final products. Efficient and improved sorting of scrapScrap has enabled good utilization of scrapScrap from various sources; however, the sorting also yields a significant stream of scrapScrap with alloy contents not suitable for remelting. Today this scrapScrap is discarded, but it should rather be purified and used in remelting. The principles of the Hoopes cell for producing high-purity aluminiumAluminium was adapted in a laboratory cell with completely new geometry and optimized for high throughput and a purity like primary aluminiumAluminium metal. 99.5% pure Al was achieved from highly alloyed scrapScrap sources with less than 5 kWh/kg energyEnergy usage and no CO2CO2 emissionsEmissions. The process can remove any alloying elements.