( 中南大學(xué) 資源加工與生物工程學(xué)院， 長沙 410083)
摘 要: 采用顎式破碎機(jī)或輥式破碎機(jī)均難以實(shí)現(xiàn)對(duì)廢舊印刷電路板的充分粉碎，從粉碎過程來看， 具有剪切和沖擊作用的圓盤粉碎機(jī)或振動(dòng)磨樣機(jī)的粉碎效果要優(yōu)越一些。 廢舊印刷電路板的資源組成包括47%的金屬、 27%的塑料以及26%的玻璃、 陶瓷等難熔氧化物。 與天然資源相比， 廢舊印刷電路板中的金屬含量特別豐富， 1t中的金屬含量分別達(dá)到了300gAu、 5~10kgAg、 19.66%Cu、 3.93%Pb和3.68%Sn， 此外還含有Fe、 Al、 Zn、 Ca、 Mn、 Ni、 In等十多種有價(jià)金屬， 具有重要的回收價(jià)值。
關(guān)鍵字: 電子廢棄物； 印刷電路板； 粉碎； 回收
printed circuit board scrap
（ School of Resource Processing and Bioengineering,
Central South University, Changsha 410083, China）
Abstract: The crushing performance of printed circuit board(PCB) was studied with several crushers. The results show that it is difficult to crush PCB. The crushing performance of PCB with gyradisc crusher, especially vibration grinding, which have cut or impact action, is excelled that with jaw crusher or roller crusher. The PCB scrap is proved worthwhile to recycle by using variety of modern characterization methods. With comparing to the natural resources, this material stream remains to be rich precious metals and nonferrous metals. In PCB scrap, metals account for 47% the total material composition, in which there are 19.66% copper, 11.47% iron, 3.93% lead, 300g gold and 5-10kg silver in 1t PCB. In addition, the PCB scrap contains 27% plastics and 26% refractory oxides.
Key words: electronic scrap; printed circuit board; crushing; recycling
