双酸协同强化浸出赤泥中铝铁的试验研究  

Experimental Study on Enhanced Leaching of Aluminum and Iron from Red Mud by Synergistic Dual Acids

作　　者：王鸿齐 朱晓波 李望 袁彩凤 王梦园 WANG Hong-qi;ZHU Xiao-bo;LI Wang;YUAN Cai-feng;WANG Meng-yuan(College of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Jiaozuo 454000,China;Henan Ecological Environment Technology Center,Zhengzhou 450000,China;Henan Engineering Research Center for Ecological Environment Damage Identification and Restoration,Zhengzhou 450000,China)

机构地区：[1]河南理工大学化学化工学院,河南焦作454000 [2]煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454000 [3]河南省生态环境技术中心,河南郑州450000 [4]河南省生态环境损害鉴定与修复工程技术研究中心,河南郑州450000

出　　处：《稀有金属与硬质合金》2025年第2期34-40,共7页Rare Metals and Cemented Carbides

基　　金：河南省重点研发计划项目(231111321800);国家自然科学基金项目(51804103,51904097);河南省科技项目(242102320354)。

摘　　要：为促进赤泥中铝铁资源的回收利用,本文研究了赤泥中Al、Fe在双酸(硫酸+盐酸)体系中的浸出行为,系统考察了双酸浓度、硫酸与盐酸体积比、浸出温度、液固比和浸出时间对Al、Fe元素浸出率的影响,得到了如下Al、Fe的最佳浸出条件:硫酸和盐酸总体积分数28%、硫酸与盐酸体积比1∶1、浸出温度100℃、液固比9 mL/g和浸出时间60 min。在此条件下Al和Fe的浸出率分别可达到97.5%和73.8%。双酸浸出产生了有效的协同效应,盐酸可以与Fe^(3+)形成稳定的络合物,而硫酸则提供必要的酸度和氧化性,促进Al^(3+)的溶解,显著提高了铝铁的浸出效率,为赤泥资源化利用提供了新的路径。To promote the recovery and utilization of aluminum and iron resources from red mud,the lea-ching behaviors of Al and Fe were studied in a dual-acid(H_(2)SO_(4)+HCl)system.The effects of dual-acid concentration,volume ratio of sulfuric acid to hydrochloric acid,leaching temperature,liquid-solid ratio,and leaching time on the leaching rates of Al and Fe were systematically investigated.The optimal leaching conditions are determined as follows:total volume fraction of sulfuric acid and hydrochloric acid of 28%,volume ratio of sulfuric acid to hydrochloric acid of 1∶1,leaching temperature of 100℃,liquid-solid ratio of 9 mL/g,and leaching time of 60 min.Under these conditions,the leaching rates of Al and Fe can reach 97.5%and 73.8%,respectively.The dual-acid leaching exhibits effective synergistic effect.Hydrochloric acid can form a stable complex with Fe^(3+),while sulfuric acid provides the necessary acidity and oxidizing ability to promote the dissolution of Al^(3+),which significantly enhances the leaching efficiency of aluminum and iron,and provides a novel approach for the resource utilization of red mud.

关 键 词：赤泥 铝 铁 浸出 硫酸 盐酸 协同效应 

分 类 号：TD98[矿业工程—选矿]