Aluminothermic Reduction of Sulfides via Reactive Vacuum Distillation
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LightMetals2022_StinnTollAllanore.pdf
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1.21 MB
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20a484b6d87bd8365b67c9c902766e54
Author(s)
Stinn, Caspar
Toll, Spencer
Allanore, Antoine
Date Issued
February 5, 2022
Publisher
Springer International Publishing
Citation
Stinn, C., Toll, S., Allanore, A. (2022). Aluminothermic Reduction of Sulfides via Reactive Vacuum Distillation. In: Eskin, D. (eds) Light Metals 2022. The Minerals, Metals & Materials Series. Springer, Cham.
Version
Author's final manuscript
Abstract
Master alloys for aluminum serve as a source of alloying elements that are essential to tailoring the metal to its many end uses, ranging from automotive to aerospace to structural applications. Presently, aluminum master alloy production is complicated by challenges ranging from high emissions and costs to low yields and productivities. While master alloys are typically produced from oxide, halide, or metallic feedstocks, sulfide chemistry provides a new opportunity to reduce economic and environmental costs via process intensification and increased yields. Herein, we explore the production of aluminum master alloys from sulfide feedstocks through aluminothermic reduction via reactive vacuum distillation. We present a thermodynamic framework to elucidate the behavior of aluminum as a reductant for sulfides, focusing on volatility and gas atmosphere. We demonstrate the production of a 10 wt% manganese master alloy via aluminothermic reduction of manganese sulfide, with a manganese yield of over 95%. Our thermodynamic and experimental results suggest that aluminothermic reduction of sulfides is a possible new route for the production of aluminum master alloys.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1007/978-3-030-92529-1_89
