摘要
研究了以NH_(3)·H_(2)O-NH_(4)Cl体系从再生铜冶炼渣中强化浸出铜,考察了氨水浓度、NH_(4)Cl浓度、浸出时间和温度对铜浸出率的影响。结果表明:在固液质量体积比1/7、氨水浓度4 mol/L、NH_(4)Cl浓度5 mol/L、温度60℃、浸出时间1.5 h、搅拌速度900 r/min条件下,铜浸出率为95.15%;浸出过程符合单颗粒反应动力学模型,反应受内扩散控制,反应活化能为21.38 kJ/mol;NH_(4)^(+)与铜化合物反应生成铜氨配合物,其中Cu(NH_(3))_(4)^(2+)具有氧化性,与氨水共同作用加速浸出过程实现铜的浸出;研究结果为再生铜冶炼渣实现资源化提供参考。
Enhanced leaching of copper from regenerated copper smelting slag using NH_(3)·H_(2)O-NH_(4)Cl system was studied.The effects of ammonia concentration,NH_(4)Cl concentration,leaching time and temperature on leaching of copper were investigated.The results show that the copper leaching rate is 95.15%under the conditions of solid mass/liquid volume of 1/7,ammonia concentration of 4 mol/L,NH_(4)Cl concentration of 5 mol/L,temperature of 60℃,leaching time of 1.5 h and stirring speed of 900 r/min.The leaching process conforms to the single particle reaction kinetic model,the reaction is controlled by internal diffusion,and the reaction activation energy is 21.38 kJ/mol;NH_(4)^(+) reacts with copper compounds to form copper ammonia complex,Cu(NH_(3))_(4)^(2+) has oxidation property and acts with ammonia to accelerate the leaching process and realize copper leaching.The research results provide a reference for the recycling of copper smelting slag.
作者
黄浩纶
辛旺皓
陈佳明
舒建成
雷天涯
何德军
陈梦君
HUANG Haolun;XIN Wanghao;CHEN Jiaming;SHU Jiancheng;LEI Tianya;HE Dejun;CHEN Mengjun(School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621000,China)
出处
《湿法冶金》
CAS
北大核心
2022年第5期399-404,共6页
Hydrometallurgy of China
基金
国家自然科学基金资助项目(52174386)
四川省重点研发计划项目(19ZDYF0911)
大学生创新基金资助项目(CX21-089)。
