摘要
对PCB边角料进行了温度为380℃、N2∶O2=7∶3的氧化焙烧处理,然后对其进行了金属成分定量分析,结果表明四种PCB边角料属于正常的PCB范畴。这为冶金及化工企业回收PCB边角料提供了一种简易、科学可行的金属成分测定方法。此外,采用热重-差热法对四种PCB边角料在氮气气氛下进行了升温速率为20K/min的热解实验,发现PCB边角料的热解可分为三个阶段：在300℃以下时质量变化甚微,在300~360℃时质量急剧减少,在360~1000℃时质量减少得比较缓慢。随后本文对PCB边角料的热解过程进行了动力学研究,建立了四种PCB边角料在300~360℃间的表观动力学方程,并为冶金及化工企业分类回收PCB边角料提供了一些建议。
Oxidizing roast of PCB scrap was carried out under 380℃ and N2∶O2=7∶3.Subsequently,the metal composition analysis experimental was carried out under PCB scrap.It was showed that four kinds of PCB scrap belong to the ecumenic PCBs.This paper provides a simple,scientific and feasible analysis method of the metal components for metallurgical and chemical enterprises on recycling PCBs.Besides,pyrolysis experiments of four kinds of PCB scrap have been carried out with a heating rates of 20K/min in atmosphere of nitrogen by a thermogravimetry-differential thermal analysis.It was found that there were three stages during the pyrolysis reaction： the mass won＇t change much when the temperature is under 300℃;it will decrease greatly when the temperature is between 300℃ and 360℃;and it will decrease relatively slowly when the temperature is between 360℃ and 1000℃.In the following part of this paper,there is the kinetic research of the pyrolysis of PCB scrap.The apparent kinetic equations of four kinds of PCB scrap in 300~360℃ were established,and this paper provides some advices for the metallurgy and the chemical enterprises on classified recycling PCBs.
出处
《矿冶》
CAS
2010年第3期96-100,111,共6页
Mining And Metallurgy
