金属の除去と,石炭のフライアッシュから高シリカ粉の生産は,相分離プロセスを経て行われる
An Jiang1, Jingwen Wu2, Boyu Qu2
1School of Building Intelligence, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221100, P. R. China.
Waste management (New York, N.Y.)
|February 15, 2026
まとめ
この研究は,石炭の飛灰 (CFA) からシリカを浄化する新しい熱相分離-酸浸出法を示しています. このプロセスは,金属酸化物を効率的に除去し,貴重な用途のために高純度のシリカを生成します.
科学分野:
- 材料科学 材料科学とは
- 化学工学は化学工学というものです.
- 環境科学 環境科学
背景:
- 石炭フライアッシュ (CFA) の発生は,経済成長と都市化により増加しています.
- CFA利用の進歩は限られており,廃棄物管理の課題となっている.
- CFAは,高価値アプリケーションのシリカ (SiO2) の豊富な供給源です.
研究 の 目的:
- CFAからシリカを回収し,浄化する効率的な方法を開発する.
- 金属酸化物の除去のための熱相分離と酸浸出パラメータを最適化するために.
- プロセス中の相分離と金属移動のメカニズムを調査する.
主な方法:
- B2O3を相分離剤として使用した熱相分離-酸浸出技術を使用した.
- B2O3の添加,温度,保持時間を含む最適なプロセスパラメータを体系的に調査した.
- 原子スケールメカニズムを理解するために分子動力学 (MD) シミュレーションを使用しました.
主要な成果:
- 最適な条件下では,金属酸化物の除去効率が95%を超える (25重量%B2O3,1100°C,1時間) を達成しました.
- 97.22%の純度を持つ高シリカ製品を製造しました.
- MDシミュレーションでは,冷却中に急速な相分離が確認されました.
結論:
- 開発された方法は,CFAのリソース利用に対する新しい効果的なアプローチを提供します.
- 高純度のシリカはCFAから回収でき,貴重な応用が可能です.
- 段階分離メカニズムを理解することは,プロセスの最適化に不可欠です.
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