| Research on Selective Shredding of Wasted Printed Circuit Boards |
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| 引用本文： | 曹亦俊,文学峰,赵跃民. Research on Selective Shredding of Wasted Printed Circuit Boards[J]. 中国矿业大学学报(英文版), 2002, 12(1): 25-29 |
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| 作者姓名： | 曹亦俊 文学峰 赵跃民 |
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| 作者单位： | SchoolofChemicalEngineeringandTechnology,CUMT,Xuzhou,Jiangsu,221008,P.R.China |
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| 摘 要： | Electronic scrap, especially wasted printed circuit boards (PCBs), is regarded as an environmental challenge. At present, the physical separation is thought to be the environmental friendly and economical method of treating and reutilizing electronic waste. An effective liberation of metals from non-metallic components is a crucial step towards mechanical separation and recycling of wasted PCBs. In this paper, the selective shredding theory and mechanics characteristics of wasted PCBs were analyzed, and the shredded experiments of wasted PCBs by hammer mill were investigated. The result shows that the selective shredding exists in the wasted PCBs shredded process by hammer mill. The shredding velocity of non-metallic components is far greater than that of metals in the wasted PCBs shredding, which makes the metals concentrate in the coarserfr action. And the impact force of hammer mill is superior to metai liberation from non-metallic components, a satisfied metal liberation degree can be achieved in the wasted PCBs shredding by hammer mill.
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| 关 键 词： | PCBs 印制电路板 电力设备 锤式粉碎机 非金属 |
Research on Selective Shredding of Wasted Printed Circuit Boards |
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| CAO Yi jun,WEN Xue feng,ZHAO Yue min. Research on Selective Shredding of Wasted Printed Circuit Boards[J]. Journal of China University of Mining and Technology, 2002, 12(1): 25-29 |
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| Authors: | CAO Yi jun WEN Xue feng ZHAO Yue min |
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| Abstract: | Electronic scrap, especially wasted printed circuit boards (PCBs), is regarded as an environmental challenge. At present, the physical separation is thought to be the environmental friendly and economical method of treating and reutilizing electronic waste. An effective liberation of metals from non metallic components is a crucial step towards mechanical separation and recycling of wasted PCBs. In this paper, the selective shredding theory and mechanics characteristics of wasted PCBs were analyzed, and the shredded experiments of wasted PCBs by hammer mill were investigated. The result shows that the selective shredding exists in the wasted PCBs shredded process by hammer mill. The shredding velocity of non metallic components is far greater than that of metals in the wasted PCBs shredding, which makes the metals concentrate in the coarser fraction. And the impact force of hammer mill is superior to metal liberation from non metallic components, a satisfied metal liberation degree can be achieved in the wasted PCBs shredding by hammer mill. |
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| Keywords: | wasted printed circuit boards (PCBs) selective shredding reclaim |
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