矿浆电解法废弃CPU插槽的资源化回收  

Waste CPU Sockets Reutilization by Slurry Electrolysis

作　　者：李非凡[1] 陈梦君[1] 王蓉[2] LI Feifan;CHEN Mengjun;WANG Rong(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education, Southwest University of Science and Technology Mianyang,Sichuan 621010)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学国防科技学院,四川绵阳621010

出　　处：《工业安全与环保》2018年第10期88-92,共5页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(21377104);西南科技大学重点科研平台专职科研创新团队建设基金(14tdgk01);上海电子废弃物资源化协同创新中心开放基金项目

摘　　要：随着电子废弃物拆解技术的进步,其资源化向分类精细化方向发展,特别是某些稀贵金属含量高的电子元器件。以废弃CPU插槽为研究对象,采用矿浆电解法在盐酸体系中回收废弃CPU插槽中的金属,探究矿浆浓度、电流密度、盐酸浓度和电解时间对总金属分离率的影响。结果表明,当电流密度、矿浆浓度和电解时间逐渐增加时,总金属分离率呈现先增大后减小;当盐酸浓度增加时,总金属分离率不断增大。当电流密度为80 mA/cm2,矿浆浓度为75 g/L,盐酸浓度为4 mol/L和电解时间为4 h,总金属分离率最佳,为93. 49%。因此,采用矿浆电解法可以成功地将金属从废弃CPU插槽中分离回收出来,实现废弃CPU插槽中金属与非金属的分离。With the development of electronic wastes dismantling technology,the recycling of electronic wastes heads to reutilize by categories,especially for those electronic components containing high-content precious metals.Aiming to recycle valuable metals from waste CPU sockets by slurry electrolysis in the hydrochloric acid system,four factors,pulp density,current density,HCl concentration of and electrolysis time,are investigated in detail.The results show that the total metal separation rate increased first and then decreases with the increase of current density,pulp density and electrolysis time.Meanwhile,the total metal separation rate increases with the rise of HCl concentration.The highest metal separation rate is up to 93.49%when the current density is 80 mA/cm 2,pulp density is 75 g/L,HCl concentration is 4 mol/L and electrolysis time is 4 h.Therefore,slurry electrolysis can successfully recycle metals from waste CPU sockets and achieve the separating of metals and non-metals.

关 键 词：电子废弃物 CPU插槽 矿浆电解 金属回收 盐酸 

分 类 号：X705[环境科学与工程—环境工程]