变径水介质分选床回收废弃电路板中金属物质的相关因素研究  

Correlated Factors for Reclaiming Metal Materials from PCBs by Variable-diametered Water Medium Separation Bed

作　　者：伍玲玲[1,2] 段晨龙[1,2] 吕科技[1,2] 陈常州 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [2]煤炭加工与高效洁净利用教育部重点实验室,江苏徐州221116 [3]河南永锦选煤有限公司,河南禹州461470

出　　处：《矿冶工程》2013年第1期34-36,40,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金创新研究群体(50921002);中央高校基本科研业务费专项资金青年科技基金(2012QNA12);高等学校博士学科点新教师专项科研基金(20100095120003)

摘　　要：为了提高变径水介质分选床回收细粒级电路板颗粒的分选效率,对破碎至-1.00 mm的电路板颗粒进行了分选研究,建立了颗粒在流动水介质中的受力与运动学模型,确定影响分选效果的两个因素为水流速度和床体倾角。研究了床体倾角和水流速度之间的相关性,得出水流速度随床体倾角的变化率为Δv≤0.006 m3/h,可忽略两者的相关性。同时,通过单因素试验,测得水流速度为6.7 m3/h、床体倾角接近35°时,对-1.00 mm粒级物料分选效果最佳。With an aim to improve the separation etliclency ot vanabte-dlameterea water meamm separauon bed in recovering fine PCB particles, experiments were carried out to separate PCB particles crushed to -1. 130 mm. Mechanic and kinematic models of particles in flowing water were established. It can be concluded that two key factors influencing separation efficiency are the water flowing rate and obliquity angle of separation bed. According to the correlation analysis of these two factors, it can be found that, the variable rate of flowing speed with the obliquity angle of bed is no more than O. 006 m^3/h, so the correlation effects can be i of 6.7 ma/h and the obliquity angle of nearly actualized. gnored. The results of single-factor tests show that, with the flowing speed 35°, the most efficient separation of PCB with the size of - 1 mm can be

关 键 词：电子废弃物 回收 废弃电路板 变径水介质分选床 床体倾角 水流速度 相关性 

分 类 号：TD92[矿业工程—选矿]