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| Analysis on Energy Conservation and Carbon Reduction of Bath Smelting Technology of Waste Printed Circuit Boards |
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Received:April 11, 2022
Revised:April 19, 2022
Accepted:April 21, 2022
Published Online:August 11, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.09.010 |
| KeyWord:waste printed circuit boards; bath smelting; calorific value; energy conservation and carbon reduction |
| Author | Institution |
| DING Yin-gui |
中节能工程技术研究院有限公司 |
| CHEN shi-chao |
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 |
| ZHAO Hai |
中节能汕头再生资源技术有限公司 |
| ZHU Cai-fei |
中节能工程技术研究院有限公司 |
| ZOU Jie-fu |
中节能工程技术研究院有限公司 |
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| Abstract: |
| The main physical and chemical characteristics of waste printed circuit boards were analyzed. Combined with the advantages of top blow bath smelting technology, when the calorific value of the charge is controlled to be 8.5-9.5 MJ/kg, the organic matter in the charge can be fully burned by adding oxygen-rich air, and basically self-heating smelting can be realized. After calculation, the energy consumption of producing 1 ton of crude copper is 220 kgce/t, which can save 2 520 kgce/t and reduce CO2 emission by 6.60 t/t compared with ore copper, and save 170 kgce/t and reduce CO2 emission by 459 kg/t compared with recycled copper. In the actual production process of the demonstration project of waste printed circuit board melting technology, when the feed time is maintained at 2.5-3.0 h, the self-heating smelting can be realized over 80% of the production time in normal production, except for discharging slag and refueling during shutdown. |
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