废锌催化剂的铵盐浸出工艺  

Leaching waste zinc-bearing catalyst by ammonium salt

作　　者：刘晓红[1] 田明明[1] 章小明[1] 

机构地区：[1]南昌大学环境与化学工程学院,江西南昌330031

出　　处：《无机盐工业》2013年第11期50-52,共3页Inorganic Chemicals Industry

摘　　要：废锌催化剂是一种含锌废弃物，可采用铵盐浸出工艺回收其中的锌资源。具体步骤：对废锌催化剂先进行预处理，以氯化铵为浸取剂，经浸取反应、过滤分离得到氯化锌溶液。实验得到适宜的工艺条件：废锌粒度为58。80μm、氯化铵质量分数为17％、反应温度为60℃、反应时间为2h。在此条件下，锌浸出率达95．2％，镍残存率为0．7％，实验证实了氯化铵溶液作为浸取剂的优势。XRD测试表明，前驱体为Zn4CO，（0H）。·H20，得到的样品是氧化锌粉体，粉体粒径为63nm，纯度为99.3％。Waste zinc-bearing catalyst is a kind of zinc-containing waste, and zinc resource could be recovered by ammonium salt leaching process.First,the waste zinc-bearing catalyst should be pretreated.Then use ammonium chloride as leaching a- gent to get zinc chloride solution by leaching reaction and filtrating separation.The suitable process conditions have been ac- quired：the particle size of waste zinc catalyst was at 58-80 ~m,the mass fraction of ammonium chloride was 17 %, reaction time was 2 h, and reaction temperature was 60 ~C.The leaching rate of Zn was up to 95.2% and the residual rate of nickel was 0.7% under those conditions.The experiment confirmed the advantages of using the ammonium chloride solution as leaching agent.The XRD pattern showed the precursor was ZnaCO3 （OH）6＂H20 and the sample was ZnO,whose particle size was 63 nm, and the purity was 99.3%.

关 键 词：废锌催化剂 浸取剂 氯化铵 氧化锌粉体 

分 类 号：TQ132.41[化学工程—无机化工]