酸アルミニウムスラグからアルミニウムを生産する HCl ベースの新技術
Maria Bagani1, Amalia Bempelou1, Michail Vafeias1
1School of Mining and Metallurgical Engineering, National Technical University of Athens, 15780 Athens, Greece.
Journal of sustainable metallurgy
|September 2, 2025
まとめ
この研究は,カルシウムアルミナートスラグから高純度アルファ-アルミニウム酸化物 (α-Al2O3) を生成するための新しいHClベースのプロセスを提示しています. この方法はアルミニウムを効率的に抽出し,α-Al2O3にカルシネーションするために浄化します.
科学分野:
- 金属工学
- 無機化学
- 材料科学
背景:
- アルミ酸カルシウムは 工業的な副産物で 価値ある素材を回収する可能性がある.
- 効率的なアルミニウム抽出は 資源の利用に不可欠です
研究 の 目的:
- カルシウムアルミ酸塩のスラグから高純度アルファ-アルミニウム酸化物 (α-Al2O3) を生産するためのHClベースのプロセスを開発し,最適化する.
- アルミニウムの抽出,浄化,α-Al2O3への変換の主要な段階を調査する.
主な方法:
- カルシウムアルミ酸塩のスラグを水性HClで溶かしてアルミニウムとシリカを沈殿する.
- HClガスの浄化とアセトン洗浄による溶解アルミニウム塩化物 (ACH) の浄化
- 精製されたACHをカルシネートしてα-Al2O3を生成する.
主要な成果:
- 洗浄の最適化により,約90%のアルミニウム抽出が可能になった.
- ACHの純度は,浄化後に97.5%に達した.
- 最終的なα-Al2O3製品は98.5%の純度を達成した.
結論:
- 開発されたHClベースのプロセスは,カルシウムアルミ酸塩のスラグから高純度のα-Al2O3を生産するのに有効です.
- 洗浄,浄化,カルシネーションを含む多段階のアプローチにより,貴重な最終製品が得られます.
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