废弃电路板湿法破碎粒度特性研究  

Research on the Characteristics of Size Distribution of Wet-Crushed Discarded Printed Circuit Boards

作　　者：段晨龙[1] 赵跃民[1] 叶璀玲[1] 石常省[2] 张洪建[3] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [2]华北科技学院环境系,北京101601 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《中国矿业大学学报》2008年第1期88-92,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重点项目(90210035);国家自然科学基金项目(50574094)

摘　　要：为解决干法破碎过程中粉尘等的二次污染,采用以水为介质的湿法冲击式破碎机对废弃电路板进行破碎研究.探讨了破碎机理,分析了破碎机锤头类型、锤头转速和进水流量对破碎产物粒度分布的影响.提出了废弃电路板湿法破碎产品粒度分布的双罗辛-拉姆勒(DRR)函数,应用Origin 7.0软件自定义DRR函数对18种不同条件下得到的废弃电路板筛上累积产率曲线进行非线性拟合,相关性系数R2均大于0.999,且残差E值较小.说明用DRR函数描述该粒度分布,表现出良好的收敛特性,且拟合误差较小.采用Design Expert 6.0.8软件建立了DRR分布函数中各个参数与操作参数之间的关系,为废弃电路板的湿法高效冲击破碎提供了基础.A wet impacting crusher was used to achieve combination liberation of the printed circuit boards （PCB） in a water medium to solve the problem of secondary pollution from dust etc generated during the crushing process. The crushing mechanism was analyzed. The effects of hammerhead style, rotation speed, and inlet water volume on particle size distribution were investigated. A Double-Rosin-Rammler （DRR） distribution function of particles from wet crushed PCB was developed. The 18 curves of cumulative weight-percentage oversize were fit non-linearly by a self-defining DRR function using Origin 7. 0. The correlation coefficients of the fit curves are larger than 0. 999, and the residuals are small. This shows that a DRR function can accurately describe the size distribution of PCB particles. Design Expert 6.0.8 was used to establish a relationship between the DRR distribution function parameters and the operating variables, which provides a basis for the highly-effective wet crushing of PCB.

关 键 词：废弃电路板 湿法冲击破碎 粒度分布 非线性拟合 

分 类 号：TD922.4[矿业工程—选矿]