二次进风与折流对电子废弃物干法分选的影响  

Effect of Secondary Air Intake and Folding on Dry Sorting of Electronic Waste

作　　者：杨凡 柳忠彬 董泽宇 雷国强 王文强 薛建勇 YANG Fan;LIU Zhongbin;DONG Zeyu;LEI Guoqiang;WANG Wenqiang;XUE Jianyong(College of Mechanical Engineering,Sichuan University of Science&Engineering,Yibin 644000,Sichuan,China)

机构地区：[1]四川轻化工大学机械工程学院,四川宜宾644000

出　　处：《有色金属（选矿部分）》2023年第1期104-109,共6页Nonferrous Metals（Mineral Processing Section）

基　　金：四川省重点研发计划项目(2021YFG264);过程装备与控制工程四川省高校重点实验室项目(GK202109)。

摘　　要：基于电子废弃物高效、物理分离的回收需求,建立了电子废弃物颗粒干法分选模型,在常规一次气流分选的基础上增加折流与二次进风强化电子废弃物颗粒气固耦合分离特征,研究表明结果,折流角度与二次进风气速对电子废弃物颗粒迁移轨迹和分离行为有显著影响,当进风开口大小为35 mm,一次进风速度为3.2 m/s,二次进风速度为3.6 m/s且折流角度为25°时,金的回收率达99.66%,金品位达84.35%,铜的回收率达77.91%,铜品位达88.28%,富集比为4.41,且塑料颗粒与金、铜颗粒分离效果最佳。说明在控制适当二次进风气流速度与颗粒折流角度下可显著提高电子废弃物分选的经济性,且分离环境友好,研究成果为电子废弃物无污染回收提供了一种新的参考。Based on the recovery needs of efficient and physical separation of electronic waste,a dry sorting model of electronic waste particles was established.The gas-structured separation characteristics of secondary air intake and folding are added on the basis of conventional primary airflow sorting.And the results showed that the folding angle and secondary air intake velocity had a significant impact on the migration trajectory and separation behavior of E-waste particles.When the size of the air intake opening was 35 mm,the primary air intake speed was 3.2 m/s,the secondary air inlet speed was 3.6 m/s and the folding angle was 25°.The recovery of gold was 99.66%,the grade was 84.35%.The recovery of copper was 77.91%,the grade was 88.28%and the enrichment ratio was 4.41.The separation effect between plastic particles and gold and copper particles was the best.It showed that under the control of the appropriate secondary air intake velocity and particle folding angle,the economics of E-waste sorting can be significantly improved and the separation was environmentally friendly.The research results provided a new reference for the pollution-free recycling of E-waste.

关 键 词：电子废弃物 二次进风 折流 

分 类 号：TD952[矿业工程—选矿] TD922