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| Experiment of Recovery of Valuable Elements from Waste Printed Circuit Boards Smelting Ash by Water Leaching |
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Received:May 24, 2019
Revised:May 27, 2019
Accepted:May 27, 2019
Published Online:August 16, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.09.010 |
| KeyWord:waste printed circuit boards smelting ash; sulfation roasting product; water leaching; copper; zinc; lead; separation |
| Author | Institution |
| LIU Gongqi |
北京工业大学材料科学与工程学院 |
| PAN De’an |
北京工业大学材料科学与工程学院 |
| LI Bin |
北京工业大学材料科学与工程学院 |
| WU Yufeng |
北京工业大学材料科学与工程学院 |
| YANG Feihua |
北京建筑材料科学研究总院固废资源化利用与节能建材国家重点实验室 |
| CHENG Na |
沈阳中科生态环评有限公司 |
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| Abstract: |
| Process of sulfation roasting product from waste printed circuit boards smelting ash was studied. Effects of leaching temperature, stirring speed, leaching time and L/S on leaching rate of copper, zinc and lead were investigated. The results show that leaching rate of copper and zinc is 99% above at room temperature, and lead can be mostly enriched in leaching residue. Stirring speed, leaching time and L/S exert big influence on leaching rate of copper and zinc, while weak influence on lead leaching rate. Leaching rate of copper and zinc is 99.49% and 99.58%, respectively, and lead content in leaching residue is about 50% under the optimum conditions including leaching temperature of 40 ℃, stirring speed of 175 r/min, leaching time of 1 h, and L/S of 5︰1. |
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