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| Research on Recovery of Selenium from Semiconductor Waste by Adjusting Oxidation Potential in HCl-NaClO3 System |
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Received:August 24, 2021
Revised:September 03, 2021
Accepted:September 06, 2021
Published Online:December 17, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2022.01.009 |
| KeyWord:regulation of oxidation potential; semiconductor scrap; HCl-NaClO3; selenium |
| Author | Institution |
| LIU Kai-hua |
北京高能时代环境技术股份有限公司 |
| JIA Meng-xin |
北京市碳纤维工程技术研究中心 |
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| Abstract: |
| Recovery of selenium from semiconductor waste by adjusting oxidation potential in HCl-NaClO3 system was studied. Effects of various factors on purity of crude selenium and recovery rate of selenium were investigated. The results show that purity of recovered crude selenium is 98.08% and recovery rate of selenium is 98.75% under the conditions including particle size of raw material of -0.125 mm, L/S of 10 mL/g, initial concentration of hydrochloric acid of 3 mol/L, oxidation potential of solution of (650±15) mV, reaction temperature 70 ℃, and reaction time of 2.5 h. |
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