废旧电脑印刷电路板的热解特性及动力学分析  

Pyrolysis characteristics and kinetics analysis of waste computer printed circuit board

作　　者：刘承飞 李江平 刘大方 张鑫 田强坤 张威 夏洪应[1] LIU Chengfei;LI Jiangping;LIU Dafang;ZHANG Xin;TIAN Qiangkun;ZHANG Wei;XIA Hongying(School of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Chuxiong Dianzhong Nonferrous Metals Co.,Ltd.,Chuxiong 675000,Yunnan,China;Yunnan Copper Co.,Ltd.,Kunming 650000,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]楚雄滇中有色金属有限责任公司,云南楚雄675000 [3]云南铜业股份有限公司,昆明650000

出　　处：《有色金属科学与工程》2022年第1期38-43,共6页Nonferrous Metals Science and Engineering

基　　金：云南省万人计划产业技术领军人才(云发改人事〔2019〕1096号);云南省万人计划青年拔尖人才计划(云人社发[2018]73号)。

摘　　要：为了分析废旧电脑印刷电路板热解过程中的反应机理,研究废旧电脑印刷电路板(DN)在常规热解条件下的升温特性和热解动力学。研究发现,DN粉末主要的质量损失发生在热解温度为553~773 K时的有机物分解阶段,且可分为主要热解和残渣分解两个过程,其相应的平均活化能分别为137.12 kJ/mol和31.31 kJ/mol。通过Coats-Redfern法计算发现,升温速率为10 K/min时,电脑电路板的主要热解段符合Mample单行法则一级函数,残渣热解段则符合反应级数为1.5的Avrami-Erofeev方程。升温速率为20、30、40 K/min时,电脑电路板的热解过程符合Mample单行法则二级反应。To analyze the reaction mechanism in the pyrolysis process of waste computer printed circuit boards,this paper studied the heating characteristics and pyrolysis kinetics of waste computer printed circuit boards(DN) under conventional pyrolysis conditions.It was found that the main mass loss of DN powder occurred in the decomposition stage of organic matter at 553 ~773 K,and it could be divided into two processes,main pyrolysis and residue decomposition.Their corresponding average activation energies were respectively 137.12 kJ/mol and 31.31 kJ/mol.When the Coats-Redfern method was used,it was found that the main pyrolysis section of the computer circuit board conformed to the Mample single-line rule first-order function at the heating rate of 10 K/min,and the residue pyrolysis section conformed to the Avrami-Erofeev equation of a reaction order of 1.5.When the heating rate was 20,30 and 40 K/min,the pyrolysis process of the computer circuit board was in accordance with the second-level reaction of Mample’s single-line rule.

关 键 词：废旧印刷电路板 热重 动力学 热解特性 

分 类 号：TF111.5[冶金工程—冶金物理化学]