(1. 中南民族大學(xué) 資源與環(huán)境學(xué)院/湖北省重金屬污染防治工程技術(shù)研究中心，武漢 430074；
2. 中南民族大學(xué) 催化轉(zhuǎn)化與能源材料化學(xué)教育部重點實驗室，武漢 430074)
摘 要: 電解錳渣(Electrolytic manganese residues, EMRs)是電解錳工業(yè)產(chǎn)生的廢渣，但電解錳渣還含有部分的Mn。目前，對電解錳渣的處理大多為露天堆放，不僅造成嚴重的環(huán)境問題還造成Mn資源的浪費。針對長期堆放的庫存電解錳渣，采用球磨的方式浸出常規(guī)方法無法浸出的Mn。試驗探究了固液比、轉(zhuǎn)速、料球比、填充系數(shù)、球磨時間和不同化學(xué)助劑下等因素對Mn浸出率的影響。結(jié)果表明：當固液比為1:5、轉(zhuǎn)速為200 r/min、料球比為0.5、填充系數(shù)為0.06、球磨時間為60 min，在化學(xué)助劑檸檬酸三鈉添加量為2.2 g/kg或二水合草酸添加量為2.0 g/kg時，Mn的浸出率可達99%以上。球磨能夠?qū)崿F(xiàn)對堆放較久的庫存電解錳渣中Mn的高效選擇性浸出并減少Cr的干擾，為庫存電解錳渣中Mn的回收處理提供了新的方法。
關(guān)鍵字: 電解錳渣；選擇性；回收；錳；資源化
（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
