Zero‐Waste Progress for the Synthesis of High‐Purity β‐Sialon Ceramics from Secondary Aluminum Dross

The worldwide recycled aluminum generation is increasing quickly thanks to the environmental considerations and continuous growing of use demands. Aluminum dross recycling, as the secondary aluminum process, has been always considered as a problematic issue in the world. The aim of this work is to propose a methodical and easy procedure for the proposed system selection as the MCDM problem. Here, an evaluation method, integrated FAHP, is presented to evaluate aluminum waste management systems. Therefore, we drive weights of each pair comparison matrix by the use of the goal programming (GP) model. The functional unit includes aluminum dross and aluminum scrap, which is defined as 1000 kilograms. The model is confirmed in the case of aluminum waste management in Arak. For the proposed integrated fuzzy AHP model, five alternatives are investigated. The results showed that, according to the selected attributes, the best waste management alternative is the one involving the primary aluminum ingot 99.5% including 200 kg and the secondary aluminum 98% (scrap) including 800 kg, and beneficiation activities are implemented, duplicate aluminum dross is recycled in the plant, and finally it is landfilled.

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Harmless disposal and resource utilization for secondary aluminum dross: A review

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.143968 ◽

2021 ◽

Vol 760 ◽

pp. 143968

Author(s):

Hanlin Shen ◽

Bo Liu ◽

Christian Ekberg ◽

Shengen Zhang

Keyword(s):

Resource Utilization ◽

Secondary Aluminum ◽

Aluminum Dross ◽

Harmless Disposal

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Synthesis and characterization of high purity aluminum sec-butoxide from aluminum dross

Korean Journal of Chemical Engineering ◽

10.1007/s11814-009-0048-3 ◽

2009 ◽

Vol 26 (1) ◽

pp. 281-284 ◽

Cited By ~ 6

Author(s):

Seung-Joon Yoo ◽

Dong-Heui Kwak ◽

Se-Il Lee ◽

Jae-Wook Lee ◽

Un-Yeon Hwang ◽

...

Keyword(s):

High Purity ◽

Synthesis And Characterization ◽

Aluminum Dross ◽

High Purity Aluminum

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A Study of Stabilization and Recycling for Aluminum Dross

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.275-277.2237 ◽

2013 ◽

Vol 275-277 ◽

pp. 2237-2240 ◽

Cited By ~ 1

Author(s):

Hsieh Kuo Cheng ◽

T.H. Ueng ◽

Ching Chyi Chen

Keyword(s):

Calcium Oxide ◽

Manufacturing Process ◽

Raw Materials ◽

Aluminum Carbide ◽

Raw Material ◽

Hydration Reaction ◽

Secondary Aluminum ◽

Stabilizing Agents ◽

Alkaline Environment ◽

Aluminum Dross

In this study, a recycling process for stabilized secondary aluminum dross is proposed. Calcium oxide-containing materials, such as de-sulfur slag produced from steel manufacturing process, are used as stabilizing agents for secondary aluminum dross. The de-sulfur slag was first hydrolyzed. Due to the high content of calcium oxide (about 45%), hydration of de-sulfur slag can produce a solution with strong alkalinity (pH≧12). In the strong alkaline environment, the residual pernicious components in the aluminum dross, such as aluminum nitride, aluminum carbide and metal aluminum, are hydrolyzed and decomposed rapidly, resulting in the stabilization of secondary aluminum dross. The stabilized aluminum dross, therefore, was used as the raw material for preparing concrete bricks. In the subsequent concrete brick manufacturing process, the hydration reaction between stabilized aluminum dross and other raw materials can also produce strong alkaline environment (pH≧12), which further stabilizes the aluminum dross wastes, and produce high-pressure concrete bricks with satisfactory performance.

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