摘要
研究了采用化学—电积法从废旧镀锡铜线中回收铜、锡,采用H_2SO_4-CuSO_4体系从镀锡铜线中脱锡,然后根据铜-锡电极电位差,在恒压条件下分步电积得到铜和锡,再通过添加Cu_2(OH)_2CO_3实现电积尾液循环利用。考察了浸出剂成分、浸出时间、浸出温度对脱锡效果的影响,以及电积液成分、电压和阳极材料对铜、锡电积回收率的影响。结果表明:在CuSO_4·5H_2O质量浓度120~140g/L、H_2SO_4质量浓度75~100g/L、硼酸质量浓度20g/L、浸出温度30℃、浸出时间30min条件下,铜、锡分离效果较好;在电积电压2.00V条件下,铜电积回收率接近100%;在电积电压3.00V条件下,锡电积直接回收率达80%;石墨电极的铜、锡回收效果优于不锈钢电极的回收效果。
Recovery of copper and tin from tinned copper wire was studied.Tin was removed in H2SO4-CuSO4 solution.Then copper and tin were recovered by two-stage electrodeposition based on their differences of electrode potential at the constant voltage condition.Finally,the electrolysis waste liquid was reused by adding Cu2（OH）2CO3 to realize recycling.The effects of leaching solution,reaction time and temperature on leaching of tin from waste tinned copper wire were examined.The effects of electrolyte compositions,voltage and anode materials on the recovery of tin and copper were also investigated.The results show that copper and tin can be separated well at the conditions of CuSO4·5H2O concentration of 120-140g/L,H2SO4 concentration of 75-100g/L,temperature of 30 ℃ and reaction time of 30 min.When the concentration of HBO3 is 20g/L,the optimal electrodeposition voltages for copper and tin are 2.0V and 3.0V,respectively,the recovery of copper is nearly 100%,while the direct recovery of tin is about 80%.Graphite anode is better than stainless steel anode.
出处
《湿法冶金》
CAS
北大核心
2017年第2期137-142,共6页
Hydrometallurgy of China
关键词
镀锡铜线
电积
分离
铜
锡
回收
tinned copper wire
electrodeposition
copper
tin
recovery
