(1. 中南民族大学 资源与环境学院/湖北省重金属污染防治工程技术研究中心，武汉 430074；
2. 中南民族大学 催化转化与能源材料化学教育部重点实验室，武汉 430074)
摘 要: 电解锰渣(Electrolytic manganese residues, EMRs)是电解锰工业产生的废渣，但电解锰渣还含有部分的Mn。目前，对电解锰渣的处理大多为露天堆放，不仅造成严重的环境问题还造成Mn资源的浪费。针对长期堆放的库存电解锰渣，采用球磨的方式浸出常规方法无法浸出的Mn。试验探究了固液比、转速、料球比、填充系数、球磨时间和不同化学助剂下等因素对Mn浸出率的影响。结果表明：当固液比为1:5、转速为200 r/min、料球比为0.5、填充系数为0.06、球磨时间为60 min，在化学助剂柠檬酸三钠添加量为2.2 g/kg或二水合草酸添加量为2.0 g/kg时，Mn的浸出率可达99%以上。球磨能够实现对堆放较久的库存电解锰渣中Mn的高效选择性浸出并减少Cr的干扰，为库存电解锰渣中Mn的回收处理提供了新的方法。
关键字: 电解锰渣；选择性；回收；锰；资源化
（1. Hubei Engineering Research Center for Control & Treatment of Heavy Metal Pollution, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China;
2. Key Laboratory of Catalysis Conversion and Energy Materials Chemistry, Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China）
Abstract:Electrolytic manganese residues (EMRs) contained some of manganese. At present, EMRs were treated by open-air stacking, which caused serious environmental problems and made waste of Mn resources. This research provided a method for recovering Mn from EMRs by using ball milling. Solid-liquid ratio, rotation speed, material ball ratio, filling factor, ball milling time and different chemical additives were explored for effects of the Mn leaching. The results show that the leaching rate of Mn reaches more than 99% when the solid-liquid ratio is 1:5, the rotation speed is 200 r/min, the material ball ratio is 0.5, the fill factor is 0.06, the ball milling time is 60 min, the trisodium citrate is 2.2 g/kg or the oxalic acid dihydrate is 2.0 g/kg. By ball milling, manganese can be efficiently and selectively leached from the old EMRs which stacks for a long time and reduces the interference of Cr.
Key words: electrolytic manganese residue; selectivity; recovery; manganese; resource
