摘要
以粗破碎后的PCB为例,利用分级机对其进行分级,研究PCB中铜的分布与分级的关系,并对分级后产物进行热解动力学研究。分级结果表明,分级产物主要存在于分级轮转速为290 r/min的除尘器中,为55.53wt%;铜主要富集于870 r/min除尘器中,为61.83wt%。TG-DTG分析表明:除870 r/min除尘器产物因含铜量高达11.77%而失重率仅为17.36%外,1 450 r/min除尘器、435 r/min除尘器、290 r/min除尘器和290 r/min分级机产物的失重率在30%～52%之间,且失重率随分级产物含铜量的增大而减小。通过Friedman法和LF法建立热解反应动力学模型,分别得出5组产物的热解表观活化能E和频率因子lnA。
Coarsely crushed PCB sample was firstly classified to investigate the connection of copper distribution and classification.The classified products were studied by pyrolysis kinetics analysis.The results showed that,after classification,the main product obtained at 290 r/min dust catcher was 55.53wt%,while copper was mainly in the product of 870 r/min dust catcher,61.83wt%.TG-DTA results indicated that the weight-loss ratio of the five classified products were in range of 30%～52%,except for the product obtained at 870 r/min dust catcher,only 17.36%,which may be caused by its higher copper content（11.77%）.Finally,apparent activation energy（E） and frequency factor（lnA） of this five products were investigated by Friedman and LF method.
出处
《广州化工》
CAS
2011年第13期57-60,105,共5页
GuangZhou Chemical Industry
基金
四川省教育厅攻关项目(NO.08zb005)
西南科技大学科研基金(09zx7116)
关键词
PCB
分级
热解
动力学
PCB
classification
pyrolysis
kinetics
