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| Research on Recovery of Selenium from Sulfuric Acid Leaching Solution of Waste CIGS Material |
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Received:August 02, 2021
Revised:August 09, 2021
Accepted:August 11, 2021
Published Online:October 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.11.011 |
| KeyWord:CIGS waste chips; sulfuric acid leaching solution; SO2 reduction; Se recovery |
| Author | Institution |
| LI Tuo-fu |
矿冶科技集团有限公司 |
| JIN Ran-gong |
矿冶科技集团有限公司 |
| HUANG Hai-hui |
矿冶科技集团有限公司 |
| CHANG Yao-chao |
矿冶科技集团有限公司 |
| WANG Wei-zhen |
矿冶科技集团有限公司 |
| GAO Chong |
矿冶科技集团有限公司 |
| XU Xiao-hui |
矿冶科技集团有限公司 |
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| Abstract: |
| Recovery of selenium in Cu(In, Ga)Se2 (CIGS) solar cell waste materials is of great importance. Recovery of selenium from sulfuric acid leaching solution of waste CIGS solar cell materials was studied. Effects of three reducing agents, namely copper powder, sodium sulfite and sulfur dioxide, on precipitation of selenium were studied. The results show that precipitation rate is better when using SO2, and impurity elements in acid leaching solution can hardly precipitate together with selenium, which has good selectivity. Effects of temperature, sulfur dioxide flow rate and initial acid concentration on selenium precipitation were investigated. Precipitation rate of selenium is about 94.51% and selenium content in crude selenium precipitate is about 95.67% under the optimum conditions including initial acid concentration of CIGS sulfuric acid leaching solution of 20 g/L, 100 mL of acid leaching solution is fed with SO2 at flow rate of 1.8 L/h, reacting temperature of 80 ℃ and reaction time of 2 h. It provides an effective method for recycling of waste CIGS materials. |
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