摘要
常温粉碎废弃电路板易产生许多问题,如冲击热解、有害气体产生和较低的粉碎效率等,本文设计并建立了实验室液氮低温冷冻粉碎系统,研究了不同温度、不同冷冻时间对破碎产品累积产率、颗粒表面形态和性质、解离度以及粉碎效果综合指标的影响.结果表明,低温冷冻使线路板表现出脆性,在预冷温度为-120℃,冷冻时间为5 m in时,可以获得较多细粒级产品、较平滑的颗粒表面和较高的解离度.
The ambient comminution of discarded printed wiring boards can easily cause a series of problems, such as impaction pyrogenation, harmful gas emission, rower eomminution efficiency and so on. A laboratory liquid nitrogen cryogenic comminution system for discarded printed wiring boards （PWBs） was set up. Effects of different temperatures and cooling times on accumulating productivity, surface feature and character of particle, liberation degree and comminution efficiency were ;analyzed. The experimental results show that PWBs had good brittleness under cryogenic conditions, and finer size, more smooth surface and higher liberation degree of PWBs product were achieved at -120℃ in 5 rains.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2006年第2期220-224,共5页
Journal of China University of Mining & Technology
基金
国家高技术研究发展计划项目(2002AA644020)
关键词
废弃线路板
低温粉碎
累积产率
解离度
discarded printed wiring boards
cryogenic comminution
accumulating productivity
liberation degree
