废旧印刷线路板取制样方法研究  

Study on method of sampling and preparation for waste printed circuit boards

作　　者：徐丰平 谢中科 XU Fengping;XIE Zhongke(JiangXi Huagan Nerin Precious Metals Technology Co.,Ltd.,Fengcheng 331100,China)

机构地区：[1]江西华赣瑞林稀贵金属科技有限公司,江西丰城331100

出　　处：《再生资源与循环经济》2023年第6期29-31,共3页Recyclable Resources and Circular Economy

基　　金：国家重点研发计划资助项目:多源有色冶炼固废中稀散金属的可控富集关键装备与示范(2018YFC1903404)。

摘　　要：我国已成为世界上最大的电子废弃物产生国,废旧印刷线路板(WPCB)中含有大量的贵金属元素。采取合适的方法进行回收,可以提高二次资源的综合利用率。实验以WPCB为原料,利用“破碎—取样—缩分—细碎—分选”的方法得到金属和非金属(含少量金属)两个样品,金属通过熔融加工成试样1,非金属样品则直接进行研磨加工成试样2,试样1和试样2的品位通过加权计算出废旧印刷电路板最终品位。实验结果表明:该方法样品损耗率低,样品均匀性好,能够确保取制样的代表性。China has become the world's largest producer of electronic waste,wasted printed circuit boards(WPCB)contain massive precious metal elements.The comprehensive utilization rate of secondary resources can be improved using appropriate methods.In this experiment,metals and non-metals were obtained by the method of"breaking-dividing-fine-breaking-sorting"using WPCB as raw materials.The metal sample(1)was fused using medium frequency furnace,and non-metallic sample(2)was divided and grinded.The grade of sample(1)and sample(2)was calculated using weighted average method.The experiment results were showed as follows:The representativeness.of sampling and preparation can be ensured according to low loss rate and good uniformity of comparing samples.

关 键 词：废旧印刷线路板 二次资源 综合利用 品位 均匀性 

分 类 号：X796[环境科学与工程—环境工程]