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| Research on Metal Content and Economic Value of Waste Printed Circuit Boards |
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Received:June 28, 2024
Revised:July 17, 2024
Accepted:July 18, 2024
Published Online:February 18, 2025
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| DOI：doi：10.20237/j.issn.1007-7545.2025.02.020 |
| KeyWord:Waste;printed circuit;boards, metal;content, economic;value, compatibility |
| Author | Institution |
| DING Yin-gui |
中节能工程技术研究院有限公司 |
| HUANG Wen |
中节能汕头再生资源技术有限公司 |
| CHEN Shi-chao |
中节能工程技术研究院有限公司 |
| ZHAO Hai |
中节能汕头再生资源技术有限公司 |
| ZHENG Huan-dong |
中节能工程技术研究院有限公司 |
| HAN Zhi-biao |
中节能工程技术研究院有限公司 |
| YOU Shao-wei |
中节能工程技术研究院有限公司 |
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| Abstract: |
| In this paper, the variation of copper, gold, and silver content over time in 72 waste printed circuit boards samples from 9 types, 8 years, including television, computer, air conditioning, and refrigerator were analyzed . There is a significant difference in copper content among different types of waste circuit boards, with the lowest average value for washing machine circuit boards (4.58%) and the highest average value for telephone circuit boards (20.38%). The gold and silver content in waste circuit boards has been decreasing year by year. The average gold content in telephone circuit boards is the lowest (0.17g/t), while the average gold content in mobile phone circuit boards is the highest (305.69g/t). The silver content in telephone circuit boards is the lowest (3.19g/t), and the silver content in computer circuit boards is the highest (524.12g/t). The economic value of different types of circuit boards varies greatly, with mobile phone circuit boards having the highest economic value (186000 yuan/ton), gold having an economic value of 168000 yuan, and washing machine circuit boards having the lowest economic value (6000 yuan/ton). Based on years of production experience, suggestions have been made for controlling the composition of incoming materials for pyrometallurgical treatment of waste circuit boards. |
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