矿浆电解法回收废旧CPU插槽中的Cu

Recovery of Cu from wasted CPU sockets by slurry electrolysis

随着电子产品的更新换代,电子废弃物的回收需要更深入、更精细的研究。实验通过矿浆电解法实现阴极回收废弃CPU插槽中的Cu。通过改变矿浆质量浓度、电流密度、反应时间和温度,研究分析矿浆电解中金属回收率的变化,探究回收Cu的最佳条件。利用电感耦合等离子体原子发射光谱仪(ICP-AES)检测电解液和阴极粉末中的金属含量。结果显示,回收的金属元素主要存在于阴极粉末中,而不是电解液中。此外,阴极粉末中的金属元素主要由Cu和少量的Sn和Ni组成。在矿浆质量浓度为40 g·L^(-1),反应时间为7 h,电流密度为80 mA·cm^(-2),温度为15℃的条件下,Cu的阴极回收率可以达到70%。所以通过矿浆电解法能有效地将Cu从废弃CPU插槽中分离出来,实现废弃CPU插槽中Cu的回收。

With the renewal of electronic products,the recycling of e-waste requires more in-depth and detailed research.In this study,Cu was recovered from wasted CPU sockets by slurry electrolysis in the cathode.The effects of slurry concentration,current density,reaction time and temperature on the recovery of Cu from slurry electrolysis were investigated in this experiment.Inductively coupled plasma atomic emission spectrometry(ICP-AES)was used to detect metal contents in electrolyte and cathode powder.The results showed that the recovered metallic elements were mainly present in the cathode powder rather than in the electrolyte.Additionally,the metallic elements in the cathode powder consisted mainly of Cu and small amounts of Sn and Ni.Under the optimal conditions,slurry concentration of 40 g·L^(-1),reaction time of 7 h,current density of 80 mA·cm^(-2)and temperature of 15℃,the cathode recovery rate of Cu could reach to 70%.Therefore,the slurry electrolysis method could separate Cu from wasted CPU sockets and realize the recovery of Cu from wasted CPU sockets.