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The AluminumAluminum (Al) industryIndustry is currently faced with the challenge of significantly reducing the environmental impactEnvironmental Impact of Al production. Secondary Al or Al produced from Al scrap offers a beneficial pathway to lowering the production carbon footprintCarbon footprint and energy consumptionEnergy consumption while transitioning to a circular economyCircular economy business model. However, mixingMixing of Al scrap streams and introduction of impurity elementsImpurity elements at end-of-life lead to “downcycling” of Al alloysAl alloy. Downcycling of Al alloysAl alloy is notorious in the automotiveAutomotive recyclingRecycling industryIndustry. AutomotiveAutomotive Al scrap from auto shredders dubbed “TwitchTwitch”, is an amalgamation of different Al alloysAl alloy, cast as well as wrought alloys. TwitchTwitch is traditionally downcycled to low-value Al alloysAl alloy due to the complexities in separating the TwitchTwitch into various alloy families as well as difficulties in blending and producing high-value Al alloysAl alloy from scrap. This paper provides a framework and an approach that uses size gating, mass, and image analysis to separate the wrought and cast alloys within the TwitchTwitch feedstock and provides a simpler and cost-effective means of separation of the scrap stream.

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Classification of Automotive Aluminum Scrap into Cast and Wrought Alloys

  • 会议论文

  • 发表日期：

    2025年

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  • Shrivatsav Shankar,
  • Carl Söderhjelm,
  • Diran Apelian

摘要

The AluminumAluminum (Al) industryIndustry is currently faced with the challenge of significantly reducing the environmental impactEnvironmental Impact of Al production. Secondary Al or Al produced from Al scrap offers a beneficial pathway to lowering the production carbon footprintCarbon footprint and energy consumptionEnergy consumption while transitioning to a circular economyCircular economy business model. However, mixingMixing of Al scrap streams and introduction of impurity elementsImpurity elements at end-of-life lead to “downcycling” of Al alloysAl alloy. Downcycling of Al alloysAl alloy is notorious in the automotiveAutomotive recyclingRecycling industryIndustry. AutomotiveAutomotive Al scrap from auto shredders dubbed “TwitchTwitch”, is an amalgamation of different Al alloysAl alloy, cast as well as wrought alloys. TwitchTwitch is traditionally downcycled to low-value Al alloysAl alloy due to the complexities in separating the TwitchTwitch into various alloy families as well as difficulties in blending and producing high-value Al alloysAl alloy from scrap. This paper provides a framework and an approach that uses size gating, mass, and image analysis to separate the wrought and cast alloys within the TwitchTwitch feedstock and provides a simpler and cost-effective means of separation of the scrap stream.