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- Title
Resource Utilization and High-Value Targeted Conversion for Secondary Aluminum Dross: A Review.
- Authors
Huang, Kepeng; Yi, Xuemei
- Abstract
Secondary aluminum dross (SAD) is a solid waste that is separated from primary aluminum dross, which contains approximately 40–60 wt.% alumina, 2–5 wt.% aluminum, and 10–30 wt.% poisonous and harmful aluminum nitride. SAD serves as both a resource and a contaminant. Its harmlessness is mainly found in the extraction of alumina from the SAD through hydrometallurgy, and its resource utilization mainly occurs through its use for the preparation of high-value products, such as ceramics, refractory insulation bricks, and construction materials. Research on the harmless extraction of alumina has mainly focused on the preparation and high-temperature roasting of alumina hydroxide precursors and the hydrolysis and oxidation of aluminum nitride (AlN). Studies on the high-value targeted conversion of extracted Al2O3 to resources have mainly focused on the preparation of porous materials and firing of SAD-sintered bricks. We suggest the use of SAD for the fabrication of porous-based composite phase change thermal storage materials, primarily by employing Al2O3, the primary component of SAD. As a result, the mechanism of porous structure generation and regulation, binding properties of the SAD porous structure and phase change materials, and mechanism of the porous structure effect on heat storage performance should be clarified.
- Subjects
PHASE change materials; CONSTRUCTION materials; ALUMINUM nitride; POROUS materials; ALUMINUM; BRICKS; ALUMINUM oxidation
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 2, p279
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05560-1