废旧线路板富集体中金属与非金属的分离研究  

Metal and Nonmetal Separation by Slurry Electrolysis for Waste Printed Circuit Boards Metal Concentrated Scraps

作　　者：张玉改 谭秋峡 张莎[1] 陈梦君[1] ZHANG Yugai;TAN Qiuxia;ZHANG Sha;CHEN Mengjun(Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China)

机构地区：[1]西南科技大学环境与资源学院,固体废物处理与资源化教育部重点实验室,四川绵阳621010

出　　处：《环境科学与技术》2018年第6期81-85,共5页Environmental Science & Technology

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项目(14tdgk01);西南科技大学研究生创新基金(16ycx040)

摘　　要：在中国,废旧印刷线路板(WPCBs)的资源化处理一般为破碎后多级物理分选,所得金属富集体中Cu含量约60%,仍含有大量的非金属,需进一步分离。将矿浆电解法应用于此富集体,研究了Cu SO_4·5H_2O、NaCl、H_2SO_4、WPCBs富集体添加量、电流密度和电解时间对WPCBs富集体所含金属与非金属分离率的影响。结果表明:H_2SO_4、NaCl和电解时间对金属与非金属的分离率有促进作用;金属分离率随着电流密度和Cu SO_4·5 H_2O的增加先升高后降低,随着WPCBs添加量的增加而不断降低。当Cu SO_4·5H_2O、H_2SO_4、NaCl分别为30、130、60 g/L时,加入6 g WPCBs金属富集体,80 mA/cm^2下电解4 h,金属的分离率可达95.56%;此条件下所得金属粉末中Cu含量高达97.20%,其次是Fe 1.24%,最后为Al 0.59%、Pb 0.40%、Zn 0.29%、Sn 0.16%。In China,waste printed circuit boards（WPCBs）are crushed and physical separated.And the obtained WPCBs metal concentrated scraps still contain a large part of non-metals,though Cu contained in these scraps could be up to 60%.To reach a complete separation,slurry electrolysis was applied to these WPCBs metal concentrated scraps and the effect of CuSO4·5H2O,NaCl,H2SO4,WPCBs metal concentrated scraps adding amount,current density and time on separation rate were investigated in details.The results showed that H2SO4,NaCl and time indicated a positive influence on the separation rate,and it increased first and then decreased as the increase of current density and Cu SO4·5H2O.Metal separation rate decreased as the increase of WPCBs metal concentrated scraps adding amount.When Cu SO4·5H2O,NaCl and H2SO4,were respectively30,130 and 60 g/L,6 g WPCBs metal concentrated scraps adding amount was 6 g,metal and nonmetal separation was up to 95.56%at 80 mA/cm^2for 4 h by slurry electrolysis.Under this experimental conditions,Cu in the obtained metal powders was 97.20%,Fe was 1.24%,and the rest were Al,Pb,Zn and Sn,which were 0.59%,0.40%,0.29% and 0.16%,respectively.

关 键 词：废旧印刷线路板富集体 矿浆电解法 金属与非金属 分离 

分 类 号：X705[环境科学与工程—环境工程]