湿法冶金2025，Vol.44Issue(4)：440-447,8.DOI:10.13355/j.cnki.sfyj.2025.04.002
粉煤灰酸浸液中AlCl3-FeCl3-FeCl2-HCl-H2O体系的离子结构研究
Ionic Structure of AlCl3-FeCl3-FeCl2-HCl-H2O System in Acid Leaching Solution of Fly Ash
摘要
Abstract
Preparation of alumina from fly ash by hydrochloric acid method is one of the processes with significant industrial application potential.Therefore,studying the ionic structure in acid leaching solution of fly ash is of great significance for iron removal process in the method.The ionic structure of the AlCl3-FeCl3-FeCl2-HCl-H2O system in hydrochloric acid leaching solution of fly ash at pH values of 1.0,1.5,and 2.0 was investigated by combining thermodynamic calculation,quantum chemical calculation,and Raman spectroscopy.The results show that at pH=1.0,the main forms of Fe and Al complex ions in the system are[FeCl]+,[FeCl2]+and[AlCl]2+;when the pH rises to 1.5 and 2.0,[FeCl]+,[FeCl2]+and[AlCl]2+transform into hydrolysis products such as[FeOH]+,[FeOH]2+and[AlOH]2+with hydroxyl ligands.The wave function analysis results indicate that at low pH,due to the high concentration of chloride ions,the chloride complexes are more stable.As the pH increases,the concentration of hydroxide ions increases,and the formation of high-coordination hydroxyl complexes becomes easier due to their higher metal-oxygen bond order and lower Gibbs free energy.关键词
氧化铝/粉煤灰/配合离子/拉曼光谱/量子化学计算Key words
alumina/fly ash/complex ion/Raman spectroscopy/quantum chemical calculations分类
矿业与冶金引用本文复制引用
张晗阳,胡宪伟,康红光,郭瑞东,Muhammad Murtadho,严枫云,杨酉坚,王耀武,王兆文..粉煤灰酸浸液中AlCl3-FeCl3-FeCl2-HCl-H2O体系的离子结构研究[J].湿法冶金,2025,44(4):440-447,8.基金项目
国家自然科学基金资助项目(52341402) （52341402）
教育部中央高校基本科研业务费资助项目(N2225045). （N2225045）
