摘要
针对从废旧碱性锌锰电池极性材料酸浸锌时选择性差以及锌、锰分离困难等问题。研究了在NH3.H2O体系和NH3.H2O-(NH4)2SO4体系中浸出锌。结果表明:在NH3.H2O体系中,氨水质量分数为25%、液固体积质量比为15∶1、浸出时间40 min条件下,锌浸出率最高仅为45%;在NH3.H2O-(NH4)2SO4体系中,氨水质量分数为25%、硫酸铵质量浓度为200g/L、液固体积质量比为15∶1、浸出时间为20min条件下,锌浸出率最高达96%。氨水中加入硫酸铵可以促进锌的选择性浸出。
The leaching of zinc from electrode materials of spent alkaline Zn-Mn battery using acids was not ideal, and it was difficult to separate zinc from manganese in leaching solution. The leaching mechanism of zinc from electrode materials in ammonia and NH3 · H2O-（NH4 ）2 SO4 system respectively were investigated. The results showed that in ammonia system, the leaching rate of zinc only reached 45% when the electrode materials were leached for 40 min at room temperature using 25 % ammonia aqueous solution at V（liquid）： m （solid） of 15 ： 1. After adding （NH4） z SO4 into ammonia aqueous system, the leaching rate of zinc reached 96% when the electrode materials were leached for 20 min at the conditions of room temperature, （NH4）2SO4 mass concentration of 200 g/L and V（liquid） ： re（solid） of 15 ： 1 using 25% ammonia aqueous solution.
出处
《湿法冶金》
CAS
北大核心
2013年第4期252-255,共4页
Hydrometallurgy of China
基金
新世纪优秀人才支持计划项目(NCET-09-0570)
四川省杰出青年基金项目(2011JQ0008)
四川省博士后基金资助项目
关键词
废旧碱性锌锰电池
极性材料
氨水-硫酸铵体系
锌
浸出
spent alkaline Zn-Mn battery
electrode materials ~ ammonia- （NH4） 2 SO4 system
zinc
leaching
