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废旧电路板低温改性研究
摘要: 介绍了电路板的组成和类型,重点研究了废旧电路板在低温状态下冲击强度、弯曲强度和剪切强度的改性变化.实验结果表明,冲击强度和剪切强度在-30℃时变化明显.在此基础上进行了粗碎实验和细碎实验,先使用ZKB-2型双辊式剪切破碎机将电路板破碎到20 mm×20 mm的块状,测试在低温状态下的功耗并计算其生产能力,在-30℃~-10℃范围内,生产能力可提高约17%,再降低温度会使产品质量受到影响.然后使用R型冲击破碎机对废旧电路板进行细碎实验,将物料破碎到3 mm以下,并记录在不同工况下的参数.实验结果表明在-30℃左右平均功率下降得较快,冷却5min对低温改性最有利. Abstract: Introduce cryogenic grinding and the components of Printed Circuit Board (PCB). Study the low-temperature modification of PCB, including mechanical property to find the influence of the different low-temperature on impact strength, flexural strength, shear strength of PCB. Tests show that impact strength and shear strength of PCB change sharply at -30℃. Used ZKB-2 type double roll shear crusher to crush PCB to 20mm×20mm particle size, in a temperature range of -30℃~ -10℃, the product yield is 17% higher than room temperature, and much lower temperature may deteriorate the product quality of crusher. Used R type mill to grind sample to minus 3mm under different working condition, the average power is decrease in evidence at -30℃, freezing time for 5 minutes is best. 作 者: 周翠红 路迈西 潘永泰 陈茂和 乔雪峰 ZHOU Cui-hong LU Mai-xi PAN Yong-tai CHEN Mao-he QIAO Xue-feng 作者单位: 周翠红,乔雪峰,ZHOU Cui-hong,QIAO Xue-feng(北京石油化工学院环境工程系,北京,102617)路迈西,潘永泰,陈茂和,LU Mai-xi,PAN Yong-tai,CHEN Mao-he(中国矿业大学北京校区化学与环境工程学院,北京,100083)
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