摘要：针对废弃印刷电路板具有硬度高、韧性强的特点,采用具有冲击、剪切作用的分级式冲击磨对粗碎后的废弃印刷电路板物料进行细碎实验研究,根据实验数据,利用Rittinger面积学说对破碎功耗进行分析。结果表明:使用分级式冲击磨能够实现对废弃印刷电路板的充分破碎,并且当破碎粒径小于0.6 mm时,金属与非金属能够完全解离;分级式冲击磨破碎废弃印刷电路板过程中粒度分布规律符合Rosin-Rammler粒度特性方程式;随着破碎粒径的减小,破碎比表面功耗增大,当平均粒径小于0.312 mm时,比表面功耗急剧增加。

关键词： 废弃印刷电路板；分级式冲击磨；Rosin-Rammler 粒度分布函数；破碎功耗

Abstract：For waste printed circuit boards having the characteristics of high hardness and toughness, an experiment of preparing ultrafine particles of waste printed circuit boards thickly broked was conducted by classify-impact mill. The power consumption was evaluated using Rittinger's area hypothesis according to the experimental data. The results show that the waste printed circuit boards are broken and liberated effectively by classify-impact mill. The metal and nonmetal particles are totally separated while the dimension is less than 0.6 mm. The size distribution during waste printed circuit boards crushed by classify-impact mill can be described by Rosin-Rammler distribution function. With the decrease of the particle size, the specific surface power consumption increases. When the average particle size is less than 0.312 mm, the specific surface power consumption increases greatly.

keywords: waste printed circuit board； classify-impact mill； Rosin Rammler distribution function； power consumption